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

Diagnostic Usefulness of Low-Dose Nonenhanced Computed Tomography With Coronal Reformations in Patients With Suspected Acute Appendicitis: A Comparison With Standard-Dose Computed Tomography
Conclusions: Low-dose NECT with coronal reformation showed high diagnostic performance and can be used as the first-line imaging tool in the work-up of patients with suspected acute appendicitis. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

The Liver Segmental Volume Ratio for Noninvasive Detection of Cirrhosis: Comparison With Established Linear and Volumetric Measures
Objective: The aim of this study was to compare the liver segmental volume ratio (LSVR), a novel volumetric computed tomography measurement, with established linear measurements for differentiating normal from cirrhotic livers. Methods: Hepatic volumes were measured using semiautomated software (Liver Analysis Application, Philips IntelliSpace Portal) on contrast-enhanced abdominal computed tomography scans in 312 adults, including 108 patients with end-stage liver disease (mean age, 55 years; 63 men/45 women) and 204 healthy controls (potential renal donors; mean age, 46 years; 82 men/122 women). The LSVR was defined as ...
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Correction of Motion Artifacts From Shuttle Mode Computed Tomography Acquisitions for Body Perfusion Imaging Applications
Conclusions: Shuttling effects introduced during shuttle-mode CT acquisitions can be computationally corrected for body perfusion applications. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Hepatocellular Carcinoma Histological Grade Prediction: A Quantitative Comparison of Diffusion-Weighted, T2-Weighted, and Hepatobiliary-Phase Magnetic Resonance Imaging
This study aimed to compare quantitative assessments for predicting hepatocellular carcinoma (HCC) histological grades using magnetic resonance imaging. Methods: We retrospectively reviewed magnetic resonance imaging data from 49 patients with 54 surgically resected HCCs (11 well differentiated, 29 moderately differentiated, and 14 poorly differentiated). We measured the lesion-to-liver relative contrast ratio (RCR) on diffusion-weighted (DW), T2-weighted (T2W), and ethoxybenzyl-hepatobiliary images. We also evaluated contrast-to-noise ratio (CNR) on DW images, and the apparent diffusion coefficient. We compared the feasi...
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Imaging of Rare Primary Malignant Hepatic Tumors in Adults With Histopathological Correlation
Abstract: Hepatocellular carcinoma and cholangiocarcinoma are the most common primary liver malignancies in adults (comprising>85%); however, liver is also host to some unusual primary malignant tumors. Some of these tumors show distinct demographic, clinicopathologic, and imaging features. Imaging features of these uncommon primary malignant liver tumors are presented with an attempt to correlate them with histopathology. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Association of Quadriceps Muscle Fat With Isometric Strength Measurements in Healthy Males Using Chemical Shift Encoding-Based Water-Fat Magnetic Resonance Imaging
We presently investigated the association of quadriceps muscle fat with isometric strength measurements in healthy males using chemical shift encoding-based water-fat magnetic resonance imaging. Intermuscular adipose tissue fraction and intramuscular proton density fat fraction correlated significantly (P
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Feasibility of Dual Flip Angle-Based Fast 3-Dimensional T1 Mapping for Delayed Gadolinium-Enhanced Magnetic Resonance Imaging of Cartilage of the Knee: A Histologically Controlled Study
Objective: The aim of the study was to validate dual-flip angle-based fast 3-dimensional (3D) T1 mapping for delayed gadolinium-enhanced magnetic resonance imaging (MRI) of cartilage (dGEMRIC) by means of histological analyses in the assessment of the cartilage of the knee in a porcine model. Methods: A total of 15 mini pigs were included in this study. The left knee anterior cruciate ligaments of all mini pigs were transected. The mini pigs were divided into 3 groups postoperatively, with 5 pigs randomly assigned to 1 group. Dual-flip angle-based fast T1 mapping for dGEMRIC was obtained in the sagittal planes at 0 week (...
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

The Use of Breast Magnetic Resonance Imaging Parameters to Identify Possible Signaling Pathways of a Serum Biomarker, HE4
Conclusions: High correlation with MRI parameters related to neoangiogenesis may indicate signaling pathway of HE4. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Breast Imaging Source Type: research

Diffusion-Weighted Breast Magnetic Resonance Imaging: A Semiautomated Voxel Selection Technique Improves Interreader Reproducibility of Apparent Diffusion Coefficient Measurements
Conclusions: A semiautomated voxel selection tool can improve interreader reproducibility of breast lesion ADC measures. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Breast Imaging Source Type: research

Noninfectious Meningitis Caused by Systemic Lupus Erythematosus: A Case Series of 4 Patients
We report magnetic resonance imaging findings of 4 patients with systemic lupus erythematosus who presented with noninfectious meningitis by lupus itself. Magnetic resonance imaging of the brain demonstrated diffuse or localized high-signal intensity in subarachnoid spaces on fluid-attenuated inversion recovery (FLAIR) or postcontrast fluid-attenuated inversion recovery. Cerebrospinal fluid study revealed no abnormalities other than increased level of proteins. Our report is the first description of magnetic resonance findings in context of leptomeningeal involvement in non-infectious meningitis of patients with systemic l...
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Evaluating the Microcirculation of Normal Extraocular Muscles Using Quantitative Dynamic Contrast-Enhanced Magnetic Resonance Imaging
Conclusion: The quantitative DCE-MRI can be used as an important and noninvasive technique to evaluate the microcirculation of extraocular muscles. Further investigations for other extraocular muscles diseases by using quantitative DCE-MRI are warranted. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Intravoxel Incoherent Motion Diffusion Weighted Magnetic Resonance Imaging for Differentiation Between Nasopharyngeal Carcinoma and Lymphoma at the Primary Site
Objective: The aim of the study was to investigate the utility of intravoxel incoherent motion (IVIM) diffusion-weighted magnetic resonance imaging (DWI) for differentiating nasopharyngeal carcinoma (NPC) from lymphoma. Methods: Intravoxel incoherent motion–based parameters including the apparent diffusion coefficient (ADC), pure diffusion coefficient (D), pseudodiffusion coefficient (D*), perfusion fraction (f), and fD* (the product of D* and f) were retrospectively compared between 102 patients (82 with NPC, 20 with lymphoma) who received pretreatment IVIM DWI. Results: Compared with lymphoma, NPC exhibited highe...
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Paradoxically Decreased Mean Transit Time in Patients Presenting With Acute Stroke
Conclusions: A paradoxical MTT response is a frequent finding in CTP analysis of patients with acute stroke. Its presence is not associated to the location or size of the affected cerebral territory and could be related to the presence of collateral circulation. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Low-Voltage, High-Pitch Computerized Tomography Angiography of the Infrarenal Aorta and Lower Extremity Vessels: Assessment of Radiation Dose, Image Quality With Hybrid Iterative Reconstruction, and Efficacy of Test Injection Using a Monitoring Scan at Knee Level
Objectives: Our aim was to assess image quality and radiation dose of low-voltage high-pitch computed tomography angiography of the infrarenal aorta and lower extremities and evaluate the efficacy of test injection technique using a monitoring scan at knee level. Methods: A total of 60 patients with suspected peripheral arterial disease were divided into 2 groups: group 1 (30 patients, 80 kVp, high pitch [3.2], and hybrid iterative reconstruction [sinogram-affirmed iterative reconstruction]) and group 2 (30 patients, 120 kVp, low pitch [1.0], and filtered back projection reconstruction). The test injection technique at kn...
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Characteristics of Coronary Artery to Pulmonary Artery Fistula on Coronary Computed Tomography Angiography
Conclusions: More than half of patients with CPAF had no related symptoms. Coronary artery-to-pulmonary artery fistula may have a single origin or multiple origins. All of the CPAFs coursed anteriorly to the main pulmonary artery and drained into the anterolateral aspect; the CPAFs identified here frequently exhibited aneurysmal changes. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Role of Cardiac Computed Tomography in the Evaluation of Coronary Artery Stenosis in Patients With Ascending Aorta Aneurysm Detected at Transthoracic Echocardiography
Objective: The aim of our study was to evaluate the diagnostic performance of cardiac computed tomography (CCT) in the evaluation of coronary artery stenosis in patients with ascending aorta aneurysm detected at transthoracic echocardiography. Methods: We conducted a retrospective analysis of patients with an aneurysm 45 mm or greater at transthoracic echocardiography who underwent CCT from 2012 to 2014 in our hospital. We calculated the sensitivity, specificity, and positive and negative predictive values of CCT for the assessment of coronary artery stenosis ( (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Implementation and Performance of Automated Software for Computing Right-to-Left Ventricular Diameter Ratio From Computed Tomography Pulmonary Angiography Images
Objective: The aim of this study was to prospectively test the performance and potential for clinical integration of software that automatically calculates the right-to-left ventricular (RV/LV) diameter ratio from computed tomography pulmonary angiography images. Methods: Using 115 computed tomography pulmonary angiography images that were positive for acute pulmonary embolism, we prospectively evaluated RV/LV ratio measurements that were obtained as follows: (1) completely manual measurement (reference standard), (2) completely automated measurement using the software, and (3 and 4) using a customized software interface ...
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Impact of Implementing Cardiac CT in Evaluating Patients Suspected of Cardioembolic Stroke
Conclusions: Implementing cardiac CT in assessing patients suspected of cardioembolic stroke added value to echocardiographic evaluation, by detecting major embolic potential findings. In addition, cardiac CT revealed additional potentially significant stroke-unrelated findings and CAD. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Utility of MDCT MIP Postprocessing Reconstruction Images in Children With Hereditary Hemorrhagic Telangiectasia
Conclusions: Maximum intensity projection images in children with HHT can help identify the presence and the anatomy of pAVMs for future embolization. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Exponentially Decelerated Contrast Media Injection Rate Combined With a Novel Patient-Specific Contrast Formula Reduces Contrast Volume Administration and Radiation Dose During Computed Tomography Pulmonary Angiography
Clinical Relevance: Matching contrast injection timing with vessel dynamics significantly improves vessel opacification and reduces contrast dose in the assessment of pulmonary embolism during computed tomography (CT) pulmonary angiography. Purpose: The aim of this study was to investigate opacification of the pulmonary vasculature (PV) during CT pulmonary angiography using a patient-specific contrast formula (PSCF) and exponentially decelerated contrast media (EDCM) injection rate. Materials and Methods: Institutional review board approved this retrospective study. Computed tomography pulmonary angiography was performed...
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Computed Tomography Features of Septic Pulmonary Embolism Caused by Klebsiella pneumoniae Liver Abscess Associated With Extrapulmonary Metastatic Infection
Conclusions: Multiple pulmonary nodules and DVS were associated with EMI. Hepatic and pulmonary vein invasion are possible causes underlying the metastatic spread of infection. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Risk Analysis for Pathological Changes in Pulmonary Parenchyma Based on Lung Computed Tomography Images
Conclusions: The study results demonstrate that the proposed LDA model is conductive to lung computed tomography image retrieval and has reliable efficacy on risk analysis about pathological changes of pulmonary parenchyma. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Image Quality in Oncologic Chest Computerized Tomography With Iterative Reconstruction: A Phantom Study
Conclusions: Quantitative image quality parameters in oncologic chest CT are improved with MBIR compared with FBP and simpler iterative reconstruction algorithms. Artifacts at low doses are reduced. A shift in HU values was shown; thus, absolute HU values should be used with care. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Prognostic Value of Semiautomatic CT Volumetry in Patients With Stage I Non–Small Cell Lung Cancer Treated With Stereotactic Body Radiation Therapy
Conclusions: VOL and ATN from 3-dimensional image analysis of CT scans have prognostic values for non–small cell lung cancer patients treated with stereotactic body radiation therapy. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Fat Embolism Syndrome: Lung Computed Tomography Findings in 18 Patients
Conclusions: In FE syndrome, pulmonary CT findings are ground-glass opacities and dependent consolidations, associated with other variably overlapping signs, such as lobular opacities, random nodules, septal thickening, and bronchial wall thickening. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research