Medial Synovial Fold of the Posterior Cruciate Ligament on Knee Magnetic Resonance Imaging and Arthroscopy: Retrospective Investigation of Impingement
Objective: The purpose of this study was to classify the types of medial synovial fold of the posterior cruciate ligament (PCL) on magnetic resonance imaging (MRI) and to identify the relationships between fold type and impingement of the PCL on arthroscopy. Subjects and Methods: Ninety-nine patients who underwent knee MRI and arthroscopy were included. All MRIs were retrospectively and independently assessed by 2 radiologists. Medial synovial folds of the PCL on MRI were categorized into 3 types. Type A showed no medial synovial fold. Type B showed a small synovial protrusion that did not extend beyond an imaginary line ...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Primary Extremity Liposarcoma: MRI Features, Histopathology, and Clinical Outcomes
This study aimed to describe magnetic resonance imaging (MRI) features of extremity liposarcoma (LPS) subtypes, correlating with histopathology and clinical outcomes. Methods: In this retrospective study, we included 125 patients (80 men, 45 women; mean age, 53 years) with extremity LPS [23 atypical lipomatous tumor (ALT), 9 dedifferentiated (DDLPS), 70 myxoid (MLPS), 23 pleomorphic (PLPS)]. Pretreatment MRI of primary tumors in 56 patients (10 ALT, 4 DDLPS, 28 MLPS, 14 PLPS) was reviewed. Results: All subtypes were predominantly T1 isointense relative to skeletal muscle (DDLPS = 3/4, MLPS = 28/28, PLPS = 13/14) and T2 h...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

A Comparison of the Image Quality and Radiation Dose Using 100-kVp Combination of Different Noise Index and 120-kVp in Computed Tomography Pulmonary Angiography
The objective of our study was to compare the image quality and radiation dose of computed tomography pulmonary angiography (CTPA) in patients with different body mass indexes using 100-kVp combination of different noise indexes (NIs) and 120-kVp scan protocol with the adaptive statistical iterative reconstruction 2.0 algorithm (ASiR 2.0). Methods: A total of 120 patients who had undergone a CTPA were divided into 4 groups (A, B, C, and D), with 30 patients in each group. Group A underwent 120-kVp CT scan protocol in combination with NI = 25, while groups B, C, and D underwent 100-kVp CT scan protocol in combination with ...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Thoracic and Cardiovascular Imaging Source Type: research

Effectiveness of Adaptive Statistical Iterative Reconstruction for 64-Slice Dual-Energy Computed Tomography Pulmonary Angiography in Patients With a Reduced Iodine Load: Comparison With Standard Computed Tomography Pulmonary Angiography
Objective: The aim of the study was to assess the effectiveness of the adaptive statistical iterative reconstruction (ASIR) for dual-energy computed tomography pulmonary angiography (DE-CTPA) with a reduced iodine load. Materials and Methods: One hundred forty patients referred for chest CT were randomly divided into a DE-CTPA group with a reduced iodine load or a standard CTPA group. Quantitative and qualitative image qualities of virtual monochromatic spectral (VMS) images with filtered back projection (VMS-FBP) and those with 50% ASIR (VMS-ASIR) in the DE-CTPA group were compared. Image qualities of VMS-ASIR images in ...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Thoracic and Cardiovascular Imaging Source Type: research

Iterative Reconstruction Results in Larger Computed Tomography Measurements of Iliofemoral Artery Diameter in Patients Referred for Transcatheter Aortic Valve Replacement
We examined 56 consecutive patients undergoing computed tomography for possible TAVR and compared image quality and iliofemoral artery size between adaptive statistical iterative reconstructions (ASIRs) and improved model-based iterative reconstructions (MBIRs). Results: Model-based iterative reconstruction (vs ASIR) was associated with improved (P (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Thoracic and Cardiovascular Imaging Source Type: research

Volumetric Single-Beat Coronary Computed Tomography Angiography: Relationship of Image Quality, Heart Rate, and Body Mass Index. Initial Patient Experience With a New Computed Tomography Scanner
Background: Cardiac computed tomography (CT) image quality (IQ) is very important for accurate diagnosis. We propose to evaluate IQ expressed as Likert scale, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) from coronary CT angiography images acquired with a new volumetric single-beat CT scanner on consecutive patients and assess the IQ dependence on heart rate (HR) and body mass index (BMI). Methods: We retrospectively analyzed the data of the first 439 consecutive patients (mean age, 55.13 [SD, 12.1] years; 51.47% male), who underwent noninvasive coronary CT angiography in a new single-beat volumetric CT ...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Thoracic and Cardiovascular Imaging Source Type: research

Multivariate Analysis of Pleural Invasion of Peripheral Non–Small Cell Lung Cancer-Based Computed Tomography Features
Objective: The aim of this study was to comprehensively analyze computed tomography features to improve the diagnostic accuracy of visceral pleural invasion of peripheral non–small cell lung cancer. Methods: The computed tomography features of 205 non–small cell lung cancer patients were retrospectively studied. The lesion's relation to the pleura was classified into 5 grades. A multivariate logistic regression analysis was conducted to identify independent factors predicting pleural invasion. Results: The multivariate logistic regression analysis showed that sex (odds ratio [OR], 1.822; P = 0.080), pleural i...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Thoracic and Cardiovascular Imaging Source Type: research

Evaluation of Lung Radiofrequency Ablation With Dual-Energy Computed Tomography: Analysis of Tumor Composition and Lung Perfusion
Objective: The aim of this study was to evaluate radiofrequency ablation (RFA) of lung tumors with dual-energy computed tomography while focusing on tumor composition and lung perfusion. Methods: The 36 tumors in 25 patients were included. Dual-energy computed tomography was performed before RFA and at 2 days and 1, 3, and 6 months thereafter. The effective atomic number (Zeff) of the tumors before RFA was compared with the Zeff at each follow-up using the paired t test. Lung perfusion was evaluated by iodine map images. When decreased perfusion was suspected after RFA, lung perfusion scintigraphy was performed. Results:...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Thoracic and Cardiovascular Imaging Source Type: research

A Quantitative Approach to Distinguish Pneumonia From Atelectasis Using Computed Tomography Attenuation
The objective of the study is to demonstrate that an HU threshold can be quantitatively used to effectively distinguish pneumonia from atelectasis. Methods: Retrospectively identified CT pulmonary angiogram examinations that did not show pulmonary embolism but contained nonaerated lungs were classified as atelectasis or pneumonia based on established clinical criteria. The HU attenuation was measured in these nonaerated lungs. Receiver operating characteristic (ROC) analysis was performed to determine the area under the ROC curve, sensitivity, and specificity of using the attenuation to distinguish pneumonia from atelecta...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Thoracic and Cardiovascular Imaging Source Type: research

Computed Tomography Perfusion of Prostate Cancer: Diagnostic Value of Quantitative Analysis
Conclusions: Blood volume and permeability surface are the 2 CTp parameters with the highest diagnostic accuracy in differentiating between normal tissue and prostatic neoplasia. Due to the extremely high negative predictive value, they are particularly valuable in excluding the presence of cancer and thus resulting potentially useful in assessing cancer response to adjuvant therapy. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

A Liver Phantom Study: CT Radiation Dose Reduction and Different Image Reconstruction Algorithms Affect Diagnostic Quality
Objective: The aim of this study was to evaluate whether iterative reconstruction techniques for different dose levels and/or reduction of tube potential can increase liver lesion detectability. Methods: An anthropomorphic liver phantom was scanned at different dose levels (CTDIvol 15 mGy, 7.5 mGy, 5 mGy, and 2.6 mGy) and tube potential levels (120 kV, 100 kV, and 80 kV). Images were reconstructed with the following algorithms: filtered back projection (FBP), adaptive statistical iterative reconstruction (ASiR) 40%, and a model-based iterative reconstruction (Veo). The presence or absence of lesions was assessed independe...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Assessment of Early Therapeutic Changes to Concurrent Chemoradiotherapy in Uterine Cervical Cancer Using Blood Oxygenation Level–Dependent Magnetic Resonance Imaging
This study aimed to investigate blood oxygenation level–dependent magnetic resonance imaging (MRI) in assessing early therapeutic changes in cervical cancers to concurrent chemoradiotherapy (CCRT). Methods: Fifteen consecutive patients with cervical cancer treated with CCRT were evaluated with blood oxygenation level–dependent MRI at 3 T. Magnetic resonance imaging examinations were performed before treatment (preTx), 1 week after treatment (postT1) and 4 weeks after treatment (postT2). At each time, the rate of spin dephasing (R2*) values were measured in tumor and in normal uterus. Results: Tumor R2* increa...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Retrospective Assessment of Histogram-Based Diffusion Metrics for Differentiating Benign and Malignant Endometrial Lesions
Conclusions: Volumetric ADC histogram metrics may help radiologists assess the risk of malignancy in endometrial abnormalities on magnetic resonance imaging in premenopausal patients. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Evaluation of Magnetic Resonance (MR) Biomarkers for Assessment of Response With Response Evaluation Criteria in Solid Tumors: Comparison of the Measurements of Neuroendocrine Tumor Liver Metastases (NETLM) With Various MR Sequences and at Multiple Phases of Contrast Administration
Conclusion: The HBP-Gd series had the smallest interreader variability and is the recommended series to measure lesion size for evaluation of response to treatment. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Apparent Diffusion Coefficient and Dynamic Contrast-Enhanced Magnetic Resonance Imaging in Pancreatic Cancer: Characteristics and Correlation With Histopathologic Parameters
Conclusion: Apparent diffusion coefficient values and parameters of DCE-MRI can differentiate PC from nontumoral pancreases. There are correlations between ADC, Ktrans, Ve, and fibrosis content of PC. Fibroblast activation protein staining score of PC is negatively correlated to ADC and Ktrans. Apparent diffusion coefficient, Ktrans, and Ve may be feasible to predict prognosis of PC. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Focal Liver Lesions Classification and Characterization: What Value Do DWI and ADC Have?
Conclusions: Diffusion-weighted imaging may improve classification/characterization of FLLs at unenhanced/enhanced examinations. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Dynamic Contrast-Enhanced Magnetic Resonance Imaging With Gadolinium Ethoxybenzyl Diethylenetriamine Pentaacetic Acid for Quantitative Assessment of Vascular Effects on Hepatocellular-Carcinoma Lesions Treated by Transarterial Chemoembolization or Radiofrequency Ablation
Purpose: The aim of this study was to investigate the role of dynamic contrast-enhanced magnetic resonance imaging (MRI) in evaluation of blood flow changes related to transarterial chemoembolization (TACE) and radiofrequency ablation (RFA) procedures in patients with hepatocellular carcinoma (HCC) lesions. Methods: Fifty-four patients, with biopsy-proven HCC, who underwent TACE or RFA, were evaluated, 1 month after treatment, with upper abdominal MRI examination. Multiplanar T2-weighted, T1-weighted, and dynamic contrast-enhanced sequences were acquired. Dedicated perfusion software (T1 Perfusion Package, Viewforum; Phil...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Beak-Like Extension of the Pancreatic Uncinate Process on MDCT: Is It Hyperplasia or Movement?
Conclusions: Beak-like extension is caused by movement of the small bowel mesentery with deviation of mesenteric vessels or by adjacent organ expansion. Beak-like extension closely mimics other pathology on nonenhanced MDCT. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Short- and Long-Term Reproducibility of Intrahepatic Lipid Quantification by 1H-MR Spectroscopy and CT in Obesity
Conclusions: Proton magnetic resonance spectroscopy and CT are reproducible methods for short- and long-term quantification of IHL content. Our results can guide sample size calculations for interventional and longitudinal studies. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Lesion Size and Iodine Quantification to Distinguish Low-Grade From High-Grade Clear Cell Renal Cell Carcinoma Using Dual-Energy Spectral Computed Tomography
Objective: The aim of this study was to assess the utility of lesion size and iodine quantification using dual-energy spectral computed tomography to distinguish between low-grade and high-grade clear cell renal cell carcinomas (ccRCCs). Methods: Spectral parameters of 75 patients with pathologically proven ccRCCs who underwent preoperative dual-energy spectral computed tomography examinations were divided into low-grade and high-grade groups. Independent sample t test, receiver operating characteristic curve analysis, and Spearman rank correlation were analyzed. Results: The lesion size was significantly smaller, and sp...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Quantitative Computed Tomography Assessment of Air Trapping in Relapsing Polychondritis: Correlations with Spirometric Values: Erratum
No abstract available (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Erratum Source Type: research

How Low Can We Go in Radiation Dose for the Data-Completion Scan on a Research Whole-Body Photon-Counting Computed Tomography System
Purpose: A research photon-counting computed tomography (CT) system that consists of an energy-integrating detector (EID) and a photon-counting detector (PCD) was installed in our laboratory. The scanning fields of view of the EID and PCD at the isocenter are 500 and 275 mm, respectively. When objects are larger than the PCD scanning field of view, a data-completion scan (DCS) using the EID subsystem is needed to avoid truncation artifacts in PCD images. The goals of this work were to (1) find the impact of a DCS on noise of PCD images and (2) determine the lowest possible dose for a DCS such that truncation artifacts are ...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Radiologic Physics Source Type: research

Application of a Colored Multiexposure High Dynamic Range Technique to Radiographic Imaging: An Experimental Trial to Show Feasibility
Conclusions: This experimental trial showed the feasibility of applying the HDR technique to radiographic imaging to expand the dynamic range of conventional radiographic images using a colored multiexposure approach. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Radiologic Physics Source Type: research

Periprosthetic Artifact Reduction Using Virtual Monochromatic Imaging Derived From Gemstone Dual-Energy Computed Tomography and Dedicated Software
Objective: The aim of this study was to explore the usefulness of combined virtual monochromatic imaging and metal artifact reduction software (MARS) for the evaluation of musculoskeletal periprosthetic tissue. Methods: Measurements were performed in periprosthetic and remote regions in 80 patients using a high-definition scanner. Polychromatic images with and without MARS and virtual monochromatic images were obtained. Results: Periprosthetic polychromatic imaging (PI) showed significant differences compared with remote areas among the 3 tissues explored (P
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Radiologic Physics Source Type: research

A New Method for Cone-Beam Computed Tomography Geometric Parameters Estimation
Abstract: This work demonstrates a new approach for geometric parameters estimation of cone-beam computed tomography system from the coordinates of the centroids of 2 projected point sources sampled over 360 degrees. Nonlinear object expression was derived for the coordinates of the centroids in terms of the geometric parameters after a slice of reasonable simplification, which aims to improve the convergence and robustness of the nonlinear object expression. All of the geometric parameters could be precisely estimated from the nonlinear object expression using the annealing algorithm. The simulations and experiments indic...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Radiologic Physics Source Type: research

A Novel Scatter Correction Method for Cone-Beam Computed Tomography
Abstract: In this article, a novel scatter correction approach was proposed based on the Klein-Nishina formulation. Through a series of deductions from this formulation, a principle was proposed that the photon intensity distribution was determined by the attenuation coefficient μ and the path length l. This means if 2 pencil beams pass through 2 objects with the same μl, even if the attenuation coefficient μ and the path length l of the objects are different, they will still achieve the same photon intensity distribution, that is, the same point spread function. Subsequently, a novel scatter correction approach w...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Radiologic Physics Source Type: research

A Prototype Hybrid Gypsum-Based 3-Dimensional Printed Training Model for Computed Tomography–Guided Spinal Pain Management
This article details design methodology of an anatomically realistic and accurate physical 3-dimensional model of the lumbosacral spine from computed tomography data utilizing 3-dimensional printing. This model is unique in that the radiodense bony lumbosacrum is reconstructed using gypsum, which because of its high calcium content allows for the appropriate imaging characteristics mimicking bone. The model allows trainees to become competent in needle placement for image-guided diagnostic and therapeutic procedures. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Methodology for Morphometric Analysis of Modern Human Contralateral Premolars
This study aimed at developing a standard methodology for morphometric analysis and comparison of contralateral human premolar pulp space using microcomputed tomography (micro-CT) and semiautomated software. The primary objective was to establish a method to compare the complex and minute morphological internal volumes of contralateral premolar pulp spaces and determine their degree of similarity. The secondary aim was to introduce new methodology for selecting contralateral premolars for the study of biomaterials and techniques. Methods: Forty-one intact human premolar pairs (n = 82) extracted from 28 patients were scann...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Prognostic Utility of Computed Tomography Histogram Analysis in Patients With Post–Cardiac Arrest Syndrome: Evaluation Using an Automated Whole-Brain Extraction Algorithm
Objective: The aim of the study was to evaluate the prognostic utility of computed tomography (CT) histogram analysis with an automated whole-brain extraction algorithm in patients with post–cardiac arrest syndrome (PCAS). Methods: Computed tomography data from consecutive patients between January 2009 and February 2012 were obtained and retrospectively analyzed. All CT images were obtained using a 64-detector-row CT scanner with a slice thickness of 4.0 mm. A brain region was extracted from the whole-brain CT images using our original automated algorithm and used for the subsequent histogram analysis. The obtained ...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Intracardiac Embolized Prostate Brachytherapy Seeds: Imaging Features in Patients Undergoing Electrocardiogram-Gated Cardiac Computed Tomography
Conclusions: Intracardiac embolized brachytherapy seeds appear as small objects with surrounding metallic artifact characteristically embedded in the inferior aspect of the basal right ventricular free wall. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Effect of the Motion Correction Technique on Image Quality at 320-Detector Computed Tomography Coronary Angiography in Patients With Atrial Fibrillation
Objective: Adaptive motion correction (AMC) is a new technique that can suppress blurring of the coronary arteries. We evaluated its effect on the image quality of coronary computed tomography angiography in patients with atrial fibrillation (AF). Methods: Twenty-five patients with persistent AF underwent coronary computed tomography angiography. Axial image data sets were reconstructed with and without AMC and the image noise in the perivascular tissue of the coronary arteries was measured. Two radiologists visually evaluated the overall image quality of the coronary artery segment using a 4-point scale (1, uninterpretab...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Inferior Vena Cava Filter Elucidation: How to Identify Specific Inferior Vena Cava Filter Types on Multi–Detector-Row Computed Tomography Imaging
Abstract: The use of inferior vena cava (IVC) filters in the United States has increased substantially over the last 3 decades. In addition, the number of Food and Drug Administration–approved devices has also increased during this time, and there are now more than 24 different IVC filter types that may be encountered in clinical practice. These devices vary substantially with regard to design, retrievability, and risk of potential complications that include fracture, penetration, embolization, migration, recurrent venous thromboembolism, and chronic IVC occlusion. A myriad of devices are now routinely encountered on...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Quantitative Computed Tomography Classification of Lung Nodules: Initial Comparison of 2- and 3-Dimensional Analysis
Conclusions: Three-dimensional CT methods did not improve discrimination of lung cancer, but may help distinguish benign nodules from metastases. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Computed Tomography Manifestations and Excision Cross-Complementation Group 1 Expression of Stage I Non–Small-Cell Lung Cancer and Their Correlation With Prognosis
Objective: The aim of this study was to evaluate the computed tomography (CT) manifestations and expression of the excision cross-complementation group 1 (ERCC1) and their correlation with prognosis in stage I non–small-cell lung cancer (NSCLC). Materials and Methods: A total of 133 patients with stage I NSCLC with complete 3- and 5-year disease-free survival (DFS) and overall survival (OS) data, who underwent thoracic CT and pathological examination, were included. Expression of ERCC1 in tumor samples was evaluated using semiquantitative immunohistochemical analysis. Results: The 3- and 5-year DFS rates for the 13...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Pulmonary Nodule Volumetry at Different Low Computed Tomography Radiation Dose Levels With Hybrid and Model-Based Iterative Reconstruction: A Within Patient Analysis
Conclusions: Pulmonary nodule volumetry can be accurately performed at a submillisievert dose with both FBP and hybrid IR. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

The Use of a Dynamic 4-Dimensional Computed Tomography Scan in the Diagnosis of Atraumatic Posterior Sternoclavicular Joint Instability
We report an unusual case of an atraumatic posterior subluxation of the SC joint, leading to a feeling of choking. The posterior subluxation, which occurred during shoulder motion and in supine body position, was demonstrated using a dynamic wide-volume 4-dimensional computed tomography scan. Based on continuing patient symptoms and imaging findings, surgical stabilization of the SC joint was undertaken. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Advanced Imaging of the Scapula: What Every Radiologist Needs to Know
Abstract: The scapula plays a central role in shoulder motion and stability. A wide variety of anatomic variants as well as traumatic, neoplastic, and infectious pathologies can involve the scapula. Detection of scapular lesions using radiography can be challenging because of the obscuration by the overlying structures or incomplete imaging during shoulder magnetic resonance imaging or computed tomography examinations. Familiarity with imaging characteristics of these abnormalities will allow radiologists to better diagnose and characterize scapular disorders. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Cystic Cervicitis: A Case Report and Literature Review of Cystic Cervical Lesions
We present a case of a 30-year-old woman who, while undergoing infertility evaluation, was found to have a large cystic cervical mass, shown to be cystic cervicitis on cervical cone biopsy. Differential diagnosis for benign cystic cervical lesions includes Nabothian cysts, tunnel cluster, endocervical hyperplasia, and cervicitis, whereas cystic cervical malignancies include adenocarcinoma and adenoma malignum. While it is crucial to differentiate benign from malignant lesions, imaging characteristics often overlap and may not provide a specific diagnosis. In difficult cases, definitive diagnosis should be based on clinical...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Radiation-Induced Liver Injury Mimicking Metastatic Disease in a Patient With Esophageal Cancer: Correlation of Positron Emission Tomography/Computed Tomography With Magnetic Resonance Imaging and Literature Review
We report a case of focal radiation-induced liver injury with a new focus of fluorodeoxyglucose uptake on posttreatment positron emission tomography as well as masslike enhancement and signal abnormality on magnetic resonance imaging, thus mimicking new liver metastasis. Correlation with radiation planning images suggested the correct diagnosis, which was confirmed on follow-up imaging. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Limitation of Virtual Noncontrasted Images in Evaluation of a Liver Lesion Status Post Transarterial Chemoembolization
Abstract: The authors describe a case of a patient with a solitary hepatocellular carcinoma status post transarterial chemoembolization. Follow-up imaging was performed using dual-energy computed tomography. The study was performed with and without contrast and a virtual noncontrast data set was constructed from the postcontrast images. The evaluation of this patient status post transarterial chemoembolization with virtual noncontrast alone erroneously suggested enhancement and viable tumor. However, examination of true noncontrast images revealed these findings to be due to the subtraction of iodine in Ethiodol within the...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Usefulness of the Short–Echo Time Cube Sequence at 3-T Magnetic Resonance Cholangiopancreatography: Prospective Comparison With the Conventional 3-Dimensional Fast Spin-Echo Sequence
Objectives: We evaluated prospectively the clinical use of the short–echo time (TE) Cube sequence for magnetic resonance cholangiopancreatography (MRCP) at 3 T. Methods: Using a 3-T unit, we subjected 41 consecutive patients to short-TE Cube MRCP and conventional 3-dimensional fast spin-echo (3D-FSE) MRCP. Two radiologists independently rated the image quality and the visibility of the right and left hepatic, cystic, common bile, and main pancreatic ducts and the gallbladder on a 4-point scale. The averaged visual scores by 2 readers for the image quality were calculated, and the artifacts were evaluated in cases wi...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Use of a Balloon Rectal Catheter in Magnetic Resonance Imaging of Complex Anal Fistula to Improve Detection of Internal Openings
Objective: The aim of this study was to investigate the utility of a balloon rectal channel catheter (BRCC) in complex anal fistula magnetic resonance imaging (MRI). Methods: A prospective study was done on 54 patients with clinical diagnosis of complex anal fistula. Eighteen patients had preoperative MRI before and after inserting BRCC. Another 18 underwent MRI with BRCC and the rest without. Fistulas, internal openings, extensions, and abscesses were identified on MRI and compared with surgical findings. Intraindividual and interindividual differences with and without BRCC were analyzed. Results: In intragroup patients...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Correlation Between Magnetic Resonance Imaging–Based Evaluation of Extramural Vascular Invasion and Prognostic Parameters of T3 Stage Rectal Cancer
Purpose: The aim of this study was to analyze the correlation between magnetic resonance imaging–based extramural vascular invasion (EMVI) and the prognostic clinical and histological parameters of stage T3 rectal cancers. Methods: Eighty-six patients with T3 stage rectal cancer who received surgical resection without neoadjuvant therapy were included. Magnetic resonance imaging–based EMVI scores were determined. Correlations between the scores and pretreatment carcinoembryonic antigen levels, tumor differentiation grade, nodal stage, and vascular endothelial growth factor expression were analyzed using Spearm...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Where Does Diffuse Large B-Cell Lymphoma Relapse?
Conclusions: Relapsed DLBCL generally tends to affect previously involved sites, although close to one third of patients seem to have disease recurrence exclusively in previously uninvolved sites. The great majority of involved nodal stations at relapse are also involved at baseline, whereas only one half of involved extranodal locations at relapse are involved at baseline. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Preoperative Fluorine 18 Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography for Prediction of Microvascular Invasion in Small Hepatocellular Carcinoma
Conclusions: 18F-FDG PET-CT and AFP-L3 may be useful for predicting MVI in small HCC, and the combination of the 2 factors provided reliable assessment for selection of suitable hepatic resection and liver transplantation candidates. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Active Surveillance of Small Renal Masses: A Review on the Role of Imaging With a Focus on Growth Rate
Conclusions: Growth rate is often used as a discriminant in following up a small renal mass in patients undergoing active surveillance. However, there is great variability in growth rate and it alone is not an adequate marker for determining whether the tumor is malignant. Because very few studies specified radiological characteristics of small renal masses, future studies can be done to better characterize masses. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Computed Tomography Appearance of Renal Hybrid Oncocytic/Chromophobe Tumors
Conclusions: A series of HOCTs were found on CT to have 2 distinct patterns—a heterogenous enhancement pattern and an “oncocytoma-like” pattern with a central stellate hypodensity. Although the prospective diagnosis of HOCTs on the basis of CT findings is unlikely, an awareness of the existence of these lesions is important as new means of characterizing renal masses on imaging arise. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Diffusion-Weighted Magnetic Resonance Imaging in Distinguishing Between Mucin-Producing and Serous Pancreatic Cysts
Objective: The aim of this study was to evaluate the feasibility and reproducibility of diffusion-weighted imaging in distinguishing between mucin-producing and serous pancreatic cysts. Methods: Forty-four pancreatic cysts (43 patients, 27 women; mean age, 57 years; 26 mucin-producing cysts, 18 serous cysts) that underwent histological examination or cyst analysis after diffusion-weighted magnetic resonance imaging were retrospectively reviewed. Three blinded readers independently evaluated signal intensity and apparent diffusion coefficient (ADC). Intraobserver and interobserver agreements were calculated. Fisher exact t...
Source: Journal of Computer Assisted Tomography - July 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Standard-b-Value Versus Low-b-Value Diffusion-Weighted Imaging in Hepatic Lesion Discrimination: A Meta-analysis
Conclusions: Hepatic DWI is useful in differentiating between malignant and benign hepatic lesions. Standard-b-value DWI displayed an overall superior diagnostic accuracy over low-b-value DWI. Further trials needed to determine whether increasing b values beyond 1000 s/mm2 affects the diagnostic accuracy of hepatic lesion discrimination. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Multiphase Multi–Detector Row Computed Tomography Imaging Characteristics of Large (>5 cm) Focal Hepatocellular Carcinoma
Conclusions: Large (>5 cm) focal HCC may present as a dominant mass with a pseudocapsule and initial heterogeneous or peripheral enhancement with gradual or centripetal fill-in without washout on multiphase MDCT. Awareness of this variant is important to allow distinction from other benign (eg, hemangioma) and malignant (eg, cholangiocarcinoma) focal liver lesions. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research