Review of Commonly Used Serum Tumor Markers and Their Relevance for Image Interpretation
Abstract: Serum tumor markers are firmly entrenched as one of the primary tools in an oncologist's armamentarium. They can be implemented in a broad range of applications from diagnostic assistance, assessing prognosis, or guiding therapeutic decisions. However, tumor markers also have limitations, which significantly impact how they should be used. Radiologists should be familiar with the following most prevalent tumor markers, which will all be discussed here: prostate-specific antigen (prostate), carcinoembryonic antigen (colon), α-fetoprotein (hepatocellular and testicular), carbohydrate antigen 19.9 (pancreas), ...
Source: Journal of Computer Assisted Tomography - November 1, 2015 Category: Radiology Tags: Special Review Article Source Type: research

Procedure Oriented Torsional Anatomy of the Forearm for Spasticity Injection
Conclusions: It is hoped that this series of images will increase the accuracy and safety of needle placement for spasticity injections in the forearm. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Graphic Anatomy Source Type: research

Cardiac Hydatid Cysts: Computed Tomography and Magnetic Resonance Imaging Findings of the 5 Cases
Conclusions: Regarding the diagnostic work-up of cardiac hydatid disease, CT and MRI are complimentary techniques. Whereas CT effectively depicts wall calcifications, MRI reveals the exact anatomic location and nature of the internal and external structures and is the technique used for the early diagnosis, assessment, and follow-up of patients with cardiac hydatid disease. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Residual Anatomical Disease in Diffuse Large B-Cell Lymphoma Patients With FDG-PET–Based Complete Response After First-Line R-CHOP Therapy: Does It Have Any Prognostic Value?
Conclusions: The NCCN-IPI retains its prognostic value in diffuse large B-cell lymphoma patients with 18F-fluoro-2-deoxy-d-glucose positron emission tomography–based complete response after first-line R-CHOP therapy. However, the presence of residual anatomical disease, including its size and reduction relative to baseline, has no prognostic value in these patients. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Computed Tomography Assessment of Ablation Zone Enhancement in Patients With Early-Stage Lung Cancer After Stereotactic Ablative Radiotherapy
Conclusions: The textural feature of the ablation zone of enhancement and perfusion as demonstrated in computed tomography nodule enhancement may allow early differentiation of recurrence from radiation-induced lung injury in patients' status after SABR or primary lung cancer. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Myocardial Fibrosis in Hypertrophic Cardiomyopathy: Volumetric Assessment of Late Enhancement Provided by Cardiac Computed Tomography
Introduction: With subgroups of patients with hypertrophic cardiomyopathy (HCM) confers a 4% to 5% risk for adverse prognosis. Besides left-ventricular muscle mass (LV-MM) myocardial fibrosis (MF) assessable by late gadolinium enhancement in cardiovascular magnetic resonance (LGE-CMR) has been related to that. Myocardial fibrosis can also be demonstrated by late enhancement (LE) in late-enhanced multislice computed tomography (leMDCT). This analysis investigates leMDCT whether to enable quantification of LE load in terms of LE mass by percent LV-MM in HCM. Methods: In a prospective validation study, we included 30 consecut...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Assessment of Left Ventricular Enlargement at Multidetector Computed Tomography
Purpose: Because left ventricular (LV) enlargement (LVE) is indicative of an array of cardiac pathologies, including cardiomyopathic, ischemic, and valvular heart diseases, it is important to recognize it early in the course of these diseases. The recognition of LVE on nongated contrast-enhanced computed tomography (CT) scans should be facilitated by the availability of a dimensional index. To our knowledge, no CT index of LVE has been proposed. Therefore, the study aimed to define whether the maximum LV diameter (LVd) measured on nongated multidetector computed tomography can identify LVE when referencing echocardiography...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Prediction of Reperfusion-Associated Hemorrhagic Transformation Using Dynamic Contrast-Enhanced Imaging in a Rat Stroke Model
In this study, we determined the relationship between timing of reperfusion and the frequency and severity of HT, and whether very early dynamic contrast-enhanced (DCE) imaging predicts the occurrence of reperfusion-associated HT in a model of experimental stroke. Methods: Intraluminal suture occlusion of the middle cerebral artery was used to produce transient ischemia in male Sprague Dawley rats (n = 50). Reperfusion was performed by withdrawal of the occluding filament after 3 (n = 10), 4 (n = 10), 5 (n = 10), 6 (n = 10), or 7 (n = 10) hours. Magnetic resonance imaging studies were performed before reperfusion using DCE...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Neuroradiology Source Type: research

Automatic Segmentation of the Corpus Callosum Using a Cell-Competition Algorithm: Diffusion Tensor Imaging-Based Evaluation of Callosal Atrophy and Tissue Alterations in Patients With Systemic Lupus Erythematosus
Conclusions: A cell-competition algorithm could be used to automatically evaluate callosal atrophy and tissue alterations. Assessments of the corpus callosal volume and tissue integrity helped to demonstrate the effects of CNS involvement in patients with SLE. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Original Article Source Type: research

Low-Dose Computed Tomography With Adaptive Statistical Iterative Reconstruction and Low Tube Voltage in Craniocervical Computed Tomographic Angiography: Impact of Body Mass Index
Objectives: To assess radiation dose and image quality using Adaptive Statistical Iterative Reconstruction (ASIR) in craniocervical computed tomographic angiography and to further evaluate the impact of body mass index (BMI) on image quality. Methods: A total of 178 consecutive patients (112 men, 66 women; age range, 25–79 years) were enrolled in this prospective study and randomly divided into 2 groups: group A (conventional group): 120 kV, filtered back-projection reconstruction, and group B (low-dose group): 100 kV, 40% ASIR reconstruction. Radiation dose and image quality between groups A and B were compared. Cor...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Neuroradiology Source Type: research

Functional and Anatomical Brain Abnormalities and Effects of Antidepressant in Major Depressive Disorder: Combined Application of Voxel-Based Morphometry and Amplitude of Frequency Fluctuation in Resting State
Conclusions: There is no overlap of brain regions with the functional and anatomical alterations, and they may alter independently in MDDs. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Neuroradiology Source Type: research

Apparent Diffusion Coefficient Value Is Not Dependent on Magnetic Resonance Systems and Field Strength Under Fixed Imaging Parameters in Brain
Objective: The aim of the study was to investigate the causes of apparent diffusion coefficient (ADC) measurement errors and to determine the optimal scanning parameters that are independent of the field strength and vendors of the magnetic resonance (MR) system. Materials and Methods: Brain MR images of 10 healthy volunteers were scanned using 6 MR scanners of different field strengths and vendors in 2 different institutions. Ethical review board approvals were obtained for this study, and all volunteers gave their informed consents. Coefficient of variation (CV) of ADC values were compared for their differences in variou...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Neuroradiology Source Type: research

Effect of Right-Sided Versus Left-Sided Contrast Injection on Intra-arterial Opacification Characteristics of Head and Neck Computed Tomography Angiograms and Interactions With Patient Sex, Weight, and Cardiac Output
Objective: The aims of this study were to support the standard clinical assumption that preferential right-sided injection (RSI) over left-sided injection (LSI) results in improved head and neck computed tomography angiograms and to determine which patients most benefit from RSIs. Methods: Head and neck computed tomography angiograms of 453 RSIs and 419 LSIs were included. Interactions between injection side, age, weight, body mass index, and left ventricular ejection fraction with mean vessel Hounsfield units (HU) were compared. Statistical analysis was performed using 2-tailed Student t tests, Mann-Whitney U tests, and s...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Neuroradiology Source Type: research

Magnetic Resonance Imaging Findings of Intrahepatic Bile Duct Adenoma: A Report of 4 Cases
In this study, 4 cases of BDA diagnosed from surgical resection pathology were examined. Their clinical and magnetic resonance imaging (MRI) data were retrospectively analyzed. The 4 cases (1 men and 3 women) were aged 21 to 55 years without obvious clinical symptoms. Three were identified through routine examination. Three had a history of chronic hepatitis B virus infection. Two cases were accompanied by hepatocellular carcinoma, and one had a higher level of α-fetoprotein. The MRI images of BDA all manifested as peripheral hepatic nodules with abnormal signals. The diameters of the lesions in the 4 cases were 7.7 ...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Abdominal Imaging Source Type: research

Prediction of Adrenal Adenomas With Hypercortisolism by Using Adrenal Computed Tomography: Emphasis on Contralateral Adrenal Thinning
Purpose: To analyze computed tomography (CT) characteristics of adrenal adenomas with hypercortisolism on adrenal CT compared to adenomas with hyperaldosteronism. Materials and Methods: Thirty-two adrenal adenomas, consisting of group A (hypercortisolism, n = 16) and group B (hyperaldosteronism, n = 16), were evaluated with adrenal CT. Thirty-four patients without adrenal nodule on CT and hormonal abnormality (group C) were selected for comparison. In adenomas, lesion size, attenuation value, and absolute and relative washout were compared between groups A and B. The mean adrenal thickness was compared quantitatively and q...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Abdominal Imaging Source Type: research

High-Pitch Dual-Source Computed Tomography Renal Angiography Comparison With Conventional Low-Pitch Computed Tomography Angiography: Image Quality, Contrast Medium Volume, and Radiation Dose
The objective of this study was to compare the image quality (IQ), contrast medium (CM) volume, and radiation dose of the high-pitch renal computed tomography angiography (CTA) with low-pitch protocol. Methods: Fifty patients underwent renal CTA on a dual-source 128-slice scanner via a high-pitch mode (pitch = 2.05) with 0.5-mL/kg CM injection, whereas 50 patients were also scanned on the same scanner with low-pitch (pitch = 0.6) and 1.0 mL/kg CM injection. Subjective IQ was evaluated. Objective IQ was determined by the signal-to-noise ratio and contrast-to-noise ratio. Effective radiation dose was also evaluated. Results:...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Abdominal Imaging Source Type: research

Dynamic Computed Tomographic Features of Adult Renal Cell Carcinoma Associated With Xp11.2 Translocation/TFE3 Gene Fusions: Comparison With Clear Cell Renal Cell Carcinoma
Objective: To investigate the dynamic contrast-enhanced computed tomography (CT) characteristics of renal cell carcinoma associated with Xp11.2 translocation and TFE gene fusion (Xp11.2 RCC) by comparison with clear cell renal cell carcinoma (CCRCC). Methods: Dynamic contrast-enhanced CT images and clinical and pathological records of 20 adult patients with Xp11.2 RCC confirmed by TFE3 immunohistochemical and fluorescence in situ hybridization assay were retrospectively analyzed and compared with the findings of 21 contemporary CCRCCs. Results: Renal cell carcinoma associated with Xp11.2 translocation and TFE gene fusions ...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Abdominal Imaging Source Type: research

Dual-Energy Multidetector-Row Computed Tomography of the Hepatic Arterial System: Optimization of Energy and Material-Specific Reconstruction Techniques
Purpose: To investigate the optimal dual-energy reconstruction technique for the visualization of the hepatic arterial system during dual-energy multidetector computed tomographic (MDCT) angiography of the liver. Materials and Methods: Twenty-nine nonconsecutive patients underwent dual-energy MDCT angiography of the liver. Synthesized monochromatic (40, 50, 60, and 80 keV) and iodine density data sets were reconstructed. Aortic attenuation, noise, and contrast-to-noise ratio (CNR) were measured. In addition, volume-rendered images were generated and qualitatively assessed by 2 independent readers, blinded to technique. The...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Abdominal Imaging Source Type: research

Application of an Advanced Image-Based Virtual Monoenergetic Reconstruction of Dual Source Dual-Energy CT Data at Low keV Increases Image Quality for Routine Pancreas Imaging
Conclusions: Use of a single advanced image-based virtual monoenergetic reconstruction at 55 keV in pancreatic DECT showed improved objective image quality and reader preference compared to routine images. As this image reconstruction can be incorporated into the scan protocol, this technique should be considered for routine clinical use. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Abdominal Imaging Source Type: research

Comparison of Free-Breathing With Navigator-Triggered Technique in Diffusion Weighted Imaging for Evaluation of Small Hepatocellular Carcinoma: Effect on Image Quality and Intravoxel Incoherent Motion Parameters
Objective: To evaluate the effect on image quality and intravoxel incoherent motion (IVIM) parameters of small hepatocellular carcinoma (HCC) from choice of either free-breathing (FB) or navigator-triggered (NT) diffusion-weighted (DW) imaging. Methods: Thirty patients with 37 small HCCs underwent IVIM DW imaging using 12 b values (0-800 s/mm2) with 2 sequences: NT, FB. A biexponential analysis with the Bayesian method yielded true diffusion coefficient (D), pseudodiffusion coefficient (D*), and perfusion fraction (f) in small HCCs and liver parenchyma. Apparent diffusion coefficient (ADC) was also calculated. The acquisit...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Abdominal Imaging Source Type: research

Optimizing Liver Magnetic Resonance Imaging: Does Intuitive Protocol Management Software Save Time and Produce Better Scans than Manually Optimized Protocols?
Purpose: The purpose of this study is to determine if a software package (Abdomen DOT; Siemens Medical Systems, Erlangen Germany) designed to automate magnetic resonance imaging (MRI) scans of the liver results in faster and higher quality examinations compared to optimized protocols performed by appropriately trained technologists. Materials and Methods: One hundred eight liver MRIs obtained using Abdomen DOT and 94 liver MRIs obtained without Abdomen DOT were retrospectively reviewed. Total scan time and the number of repeated sequences were objectively measured. Timing of the arterial phase, motion artifact, and quality...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Abdominal Imaging Source Type: research

The Correlation Between Diffusion-Weighted Imaging at 3.0-T Magnetic Resonance Imaging and Histopathology for Pancreatic Ductal Adenocarcinoma
Conclusions: The ADC of PDA cannot be used to reflect grades of differentiation, degree of tumor fibrosis, the expression of VEGF, the expression of Ki-67, and the tumor MVD. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Abdominal Imaging Source Type: research

Advanced Hepatocellular Carcinoma: Perfusion Computed Tomography–Based Kinetic Parameter as a Prognostic Biomarker for Prediction of Patient Survival
Conclusions: The AATH model–derived E was an effective prognostic biomarker for advanced HCC. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Original Article Source Type: research

Evaluation of Acute Abdominal Pain in the Emergency Setting Using Computed Tomography Without Oral Contrast in Patients With Body Mass Index Greater Than 25
Conclusions: In patients with body mass index greater than 25 presenting to the ED with acute abdominal pain, CT examinations can be acquired without oral contrast without compromising the clinical efficacy of CT. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Original Article Source Type: research

Multiparametric Prostate Magnetic Resonance Imaging at 3 T: Failure of Magnetic Resonance Spectroscopy to Provide Added Value
Conclusion: The addition of MRSI does not improve the accuracy of 3 T mpMRI for sextant localization of prostate cancer. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Abdominal Imaging Source Type: research

The Combination of Diffusion- and T2-Weighted Imaging in Predicting Deep Myometrial Invasion of Endometrial Cancer: A Systematic Review and Meta-Analysis
Objective: The aim of this study was to explore the diagnostic difference among the combination of diffusion-weighted imaging (DWI) and T2-weighted imaging (T2WI), diffusion-weighted imaging (DWI), and dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) in predicting deep myometrial invasion of endometrial cancer. Methods: A structured search was conducted to identify published studies between January 2005 and April 2014, which assessed depth of myometrial invasion in endometrial cancer by using DCE-MRI or DWI or DWI-T2WI. Results: A total of 15 studies were included. Significant difference was found between D...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Abdominal Imaging Source Type: research

Can Radiation Dose Be Reduced and Image Quality Improved With 80-kV and Dual-Phase Scanning of the Lower Extremities With 64-Slice Computed Tomography Angiography?
Objective: To prospectively compare the new computed tomographic angiography (CTA) protocol (NCP) using 80-kV and dual-phase scanning with the routine CTA protocol (RCP) using 120-kV and single-phase scanning in patients with peripheral arterial disease. Methods: A total of 60 patients were randomized to undergo the NCP (30 patients) or RCP (30 patients) scan. We compared the arterial attenuation values, overriding of the contrast bolus, signal-to-noise ratio, and radiation dose between 2 groups. Results: The occurrence rate of contrast bolus overriding was not statistically significant (P = 0.69). The average arterial att...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Musculoskeletal Radiology Source Type: research

Low Dose Computed Tomography for 3D Planning of Total Hip Arthroplasty: Evaluation of Radiation Exposure and Image Quality
Objective: The aim of the study was to compare radiation exposure and image quality between dedicated computed tomography (CT) protocols for preoperative total hip arthroplasty (THA) planning. Methods: Three protocols with automated tube current modulation using 64-slice (n = 177) and 128-slice CT scanners without (n = 129) and with automated tube voltage preselection (n = 84) were compared. Results: All 390 CTs were of sufficient quality for THA planning. Mean DLP was 235.0 mGy*cm (effective dose 2.8 mSv). Lowest radiation exposure (2.5 mSv) was seen with automated voltage preselection and the algorithm's selection was 10...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Musculoskeletal Radiology Source Type: research

Physiological Background of Differences in Quantitative Diffusion-Weighted Magnetic Resonance Imaging Between Acute Malignant and Benign Vertebral Body Fractures: Correlation of Apparent Diffusion Coefficient With Quantitative Perfusion Magnetic Resonance Imaging Using the 2-Compartment Exchange Model
Objective: To test the hypothesis that apparent diffusion coefficient (ADC) in vertebral bone marrow of benign and malignant fractures is related to the volume of the interstitial space, determined with dynamic contrast-enhanced (DCE) magnetic resonance imaging. Methods: Patients with acute benign (n = 24) and malignant (n = 19) vertebral body fractures were examined at 1.5 T. A diffusion-weighted single-shot turbo-spin-echo sequence (b = 100 to 600 s/mm2) and DCE turbo-FLASH sequence were evaluated. Regions of interest were manually selected for each fracture. Apparent diffusion coefficient was determined with a monoexpon...
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Musculoskeletal Radiology Source Type: research

Ultrashort Echo Time T1ρ Is Sensitive to Enzymatic Degeneration of Human Menisci
Conclusions: Ultrashort echo time T1ρ measurements can noninvasively detect and quantify severity of meniscal degeneration, which has been correlated with progression of osteoarthritis. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2015 Category: Radiology Tags: Musculoskeletal Radiology Source Type: research

Magnetic Resonance Imaging Patterns of Tumor Regression After Neoadjuvant Chemotherapy in Breast Cancer Patients: Correlation With Pathological Response Grading System Based on Tumor Cellularity
No abstract available (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Errata Source Type: research

Effect of Localizer Radiograph on Radiation Dose Associated With Automatic Exposure Control: Human Cadaver and Patient Study
No abstract available (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Errata Source Type: research

Low-Dose Pelvic Computed Tomography Using Adaptive Iterative Dose Reduction 3-Dimensional Algorithm: A Phantom Study
Conclusions: The AIDR 3D algorithm substantially reduced image noise and improved the image quality of pelvic CT images compared with those obtained with the FBP algorithm and can thus be considered a promising technique for low-dose pelvic CT examinations. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Radiation Physics Source Type: research

First Clinical Evaluation of High-Pitch Dual-Source Computed Tomographic Angiography Comparing Automated Tube Potential Selection With Automated Tube Current Modulation
Objective: To investigate and compare the use of automated tube potential selection (ATPS) with automated tube current modulation (ATCM) in high-pitch dual-source computed tomographic angiography (CTA) for imaging the whole aorta without electrocardiogram synchronization. Methods: Two groups of 60 patients underwent CTA on a dual-source computed tomographic device in high-pitch mode: ATCM (with 100-kV fixed tube potential) was used in group 1 and ATPS (with the same image quality options) in group 2. For the evaluation of radiation exposure, CT dose index and dose-length product were analyzed. Contrast and image quality we...
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Radiation Physics Source Type: research

Assessment of Low-Contrast Resolution for the American College of Radiology Computed Tomographic Accreditation Program: What Is the Impact of Iterative Reconstruction?
Conclusions: The CNR threshold used by the ACR CT accreditation program yields higher PPRs than visual assessment of LCR, potentially resulting in lower-quality images passing the ACR CNR criteria. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Radiation Physics Source Type: research

Development of a Rabbit Model of Radiation-Induced Sciatic Nerve Injury: In Vivo Evaluation Using T2 Relaxation Time Measurements
Objectives: To develop a rabbit model of radiation-induced sciatic nerve injury (RISNI), using computed tomography (CT)–guided stereotactic radiosurgery, and assess the value of T2 measurements of injured nerves. Materials and Methods: Twenty New Zealand rabbits were randomly divided into A (n = 5) and B (n = 15) groups. Group A rabbits underwent CT and magnetic resonance scan and were then killed for comparison of images and anatomy of sciatic nerves. One side of the sciatic nerve of group B rabbits received irradiation doses of 35, 50, or 70 Gy (n = 5 per group). Magnetic resonance imaging and functional assessment...
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Texture Analysis of Non–Contrast-Enhanced Computed Tomography for Assessing Angiogenesis and Survival of Soft Tissue Sarcoma
Conclusion: Texture parameters are associated with tumor angiogenesis and OS in STS. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Computed Tomography and Magnetic Resonance Manifestations of Spinal Pigmented Villonodular Synovitis
Conclusions: The CT and MR manifestations of spinal PVNS have certain characteristics and can provide the basis for the preoperative diagnosis. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Clot Through the Heart: Paradoxical Embolism With Thrombus-in-Transit at Multidetector Computed Tomography
We present the case of a 67-year-old man with concomitant stroke and pulmonary embolism 1 day after radiofrequency catheter ablation for refractory atrial tachycardia. A chest computed tomographic angiogram revealed “thrombus-in-transit” across a patent foramen ovale, confirming the diagnosis of paradoxical embolism. Paradoxical embolism is a rare definitive diagnosis. Our case is a key demonstration of the even rarer instance where such a diagnosis is confirmed at multidetector computed tomography. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Organ Doses and Radiation Risk of Computed Tomographic Coronary Angiography in a Clinical Patient Population: How Do Low-Dose Acquisition Modes Compare?
Conclusions: The use of high-pitch helical scanning leads to 65% and 72% lower lifetime-attributable risk values for men and women, respectively, compared with sequential scanning. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Effect of Reducing Field of View on Multidetector Quantitative Computed Tomography Parameters of Airway Wall Thickness in Asthma
Objective: We reduced the computed tomography (CT)–reconstructed field of view (FOV), increasing pixel density across airway structures and reducing partial volume effects, to determine whether this would improve accuracy of airway wall thickness quantification. Methods: We performed CT imaging on a lung phantom and 29 participants. Images were reconstructed at 30-, 15-, and 10-cm FOV using a medium-smooth kernel. Cross-sectional airway dimensions were compared at each FOV with repeated-measures analysis of variance. Results: Phantom measurements were more accurate when FOV decreased from 30 to 15 cm (P
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Computed Tomographic Diagnosis of Myocardial Fat Deposits in Sarcoidosis
Objective: Fat deposits in the left ventricle (LV) myocardium are uncommon and usually indicate scar due to chronic myocardial infarction. The purpose of this study was to determine the incidence of fatty lesions in the LV of patients with sarcoidosis. Materials and Methods: Review of noncontrast computed tomographic images (2-mm thickness) in 133 patients with documented extracardiac sarcoidosis (age, 35–82 years, 55 ± 10 years, 67% female) with no history of significant coronary artery disease (clinical and coronary calcium) was performed. A control group included noncontrast computed tomographies with no co...
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Diagnosis of Dissection of the Coronary Artery Dissection by Multidetector Computed Tomography: A Comparative Study With Coronary Angiology
Conclusions: Multidetector computed tomography angiography was a more sensitive and specific technique for the diagnosis of DCA compared with CAG. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Diagnostic Role of Magnetic Resonance Imaging in Obstructive Sleep Apnea Syndrome
Abstract: We aim to review the diagnostic role of magnetic resonance (MR) imaging in obstructive sleep apnea syndrome (OSAS). Basic background about sleep apnea, MR anatomy of the pharyngeal airway, and MR imaging sequences applied in obstructive sleep apnea are discussed. Static and dynamic MR imaging is used in the assessment of patients with OSAS. Magnetic resonance imaging can detect the level, degree, and cause of obstruction in the upper airway that guide the clinical diagnosis and treatment. Imaging is used for prediction of treatment outcome and monitoring and follow-up of patients with OSAS after therapy. (Source:...
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Neuroradiology Source Type: research

Longitudinal Partial Volume Correction in 2-[18F]-Fluoro-2-Deoxy-D-Glucose Positron Emission Tomography Studies of Alzheimer Disease
Conclusions: These findings suggest that applying PVC in a longitudinal context in Alzheimer disease might produce unpredictable results. Accordingly, both PVC corrected and uncorrected data should be reported to ensure that the results are physiologically plausible. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Neuroradiology Source Type: research

Automatic Brain Portion Segmentation From Magnetic Resonance Images of Head Scans Using Gray Scale Transformation and Morphological Operations
Conclusions: In this article, we have proposed a novel skull stripping method using intensity transformation and morphological operations. This is a low computational complexity method but gives competitive or better results than that of the popular skull stripping methods Brain Surface Extractor and Brain Extraction Tool. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Neuroradiology Source Type: research

Morphological Characteristics of Round Window Niche in Congenital Aural Atresia and Stenosis Patients
Objective: The aim of this study was to measure the round window niche (RWN) among congenital aural atresia (CAA), congenital aural stenosis (CAS) and control groups and to analyze whether differences exist between them. Methods: Computed tomography images of 10 normal subjects (20 ears), 27 CAS patients (30 ears) and 25 CAA patients (30 ears) were analyzed. We measured RWN on the basis of 3-dimensional reconstruction. Results: The anterior wall length and the depth of RWN were smaller in control group than those in the CAS group; furthermore, the anterior wall length and the depth of RWN in CAS group were smaller than those in CAA group (P
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Neuroradiology Source Type: research

320-Row Multidetector Computed Tomographic Angiogram in the Evaluation of Cerebral Vasospasm After Aneurysmal Subarachnoid Hemorrhage: A Pilot Study
Conclusions: A quantitative approach can be used to objectively evaluate the ability of multidetector CT angiography to assess arterial diameter in patients with clinical symptoms of postsubarachnoid hemorrhage cerebral vasospasm. This pilot study also suggests that CT angiography may overestimate the degree of cerebral vasospasm in the anterior circulation. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Neuroradiology Source Type: research

In Patients With Idiopathic Normal Pressure Hydrocephalus Postoperative Cerebral Perfusion Changes Measured by Dynamic Susceptibility Contrast Magnetic Resonance Imaging Correlate With Clinical Improvement
Conclusions: Apparently, dynamic susceptibility contrast magnetic resonance imaging can measure postoperative perfusion changes in responders. Postoperatively, perfusion increase in some grey matter structures seems to determine the degree of clinical improvement. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Neuroradiology Source Type: research

Imaging Manifestation of Adenoid Cystic Carcinoma of the Breast
Conclusions: Although ACC is a rare event in the breast, we believe that the following signs may suggest the diagnosis of this entity: a well-defined border, extensive high T2WI signals, and internal septations that demonstrate delayed enhancement in larger lesions. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2015 Category: Radiology Tags: Breast Imaging Source Type: research