Assessment of Liver and Spleen in Children With Gaucher Disease Type 1 With Chemical Shift Imaging
Conclusions Hepatic and splenic fat fraction is a promising quantitative imaging parameter for detection and quantification of hepatic and splenic infiltration in children with Gaucher disease and correlated with clinical scoring, hematologic parameters, and enzyme assay of the disease. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - March 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Impact Analysis of the Routine Use of Dual-Energy Computed Tomography for Characterization of Incidental Renal Lesions
Conclusions Incidental indeterminate renal lesions are common on routine contrast-enhanced CT. More than half of these lesions could potentially be exonerated with DECT as benign Bosniak II cysts, which could avert the need for further workup in 2.8% of patients undergoing routine abdominal CT. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - March 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Iron-Containing Abdominal Pathologies: Exploiting Magnetic Susceptibility Artifact on Dual-Echo Gradient-Echo Magnetic Resonance Imaging
A multitude of pathologic entities involve abnormal iron deposition in the abdomen. These lesions demonstrate decreased signal on longer magnetic resonance sequences with longer echo time due to T2* effect. Dual-echo gradient-echo sequences demonstrate increased susceptibility artifact with longer echo sequences. In this article, the spectrum of iron-containing abdominal pathologies is illustrated, with their characteristic distributions. Included is a brief discussion of the physics of magnetic resonance imaging of iron-containing lesions. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - March 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Diffusion-Weighted Breast Magnetic Resonance Imaging: A Semiautomated Voxel Selection Technique Improves Interreader Reproducibility of Apparent Diffusion Coefficient Measurements: Erratum
No abstract available (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Erratum Source Type: research

Comparison of Abdominal Computed Tomographic Enhancement and Organ Lesion Depiction Between Weight-Based Scanner Software Contrast Dosing and a Fixed-Dose Protocol in a Tertiary Care Oncologic Center
This study aimed to evaluate the quality of enhancement and solid-organ lesion depiction using weight-based intravenous (IV) contrast dosing calculated by injector software versus fixed IV contrast dose in oncologic abdominal computed tomographic (CT) examinations. Methods This institutional review board–exempt retrospective cohort study included 134 patients who underwent single-phase abdominal CT before and after implementation of weight-based IV contrast injector software. Patient weight, height, body mass index, and body surface area were determined. Two radiologists qualitatively assessed examinations (4 indi...
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Incidentally Detected Focal Fundal Gallbladder Wall Thickening at Contrast-Enhanced Computed Tomography: Prevalence and Computed Tomography Features of Malignancy
Conclusions Incidental focal fundal gallbladder wall thickening is usually benign. Computed tomography features help distinguish benign from malignant etiologies. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Comparison of Navigator Triggering Reduced Field of View and Large Field of View Diffusion-Weighted Imaging of the Pancreas
Rationale and Objectives The purpose of this study is to compare image quality, presence and grade of artifacts, signal-to-noise ratio, and apparent diffusion coefficient (ADC) values in pancreatic tissue between high-resolution navigator-triggered (NT) restricted field of view (rFOV) FOCUS single-shot (SS) echo-planar imaging (EPI) diffusion-weighted imaging (DWI) and NT large FOV SS-EPI DWI. Materials and Methods Magnetic resonance imaging examinations were performed with GE 3-T systems using a 32-channel body array coil. Seventeen consecutive patients were imaged. A 5-point scale semiquantitative grading system was...
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Asymptomatic Endometrial Thickening of 8 mm or Greater on Postcontrast Computed Tomography in Postmenopausal Women Is a Predictor of Endometrial Cancer
Objectives The aim of this study was to assess the value of opportunistic endometrial thickness measurement on postcontrast computed tomography (CT) as a predictor of endometrial cancer in asymptomatic postmenopausal women. Methods For this Health Insurance Portability and Accountability Act–compliant, institutional review board–approved retrospective study with waiver of informed consent, our institution's tumor board database was searched for postmenopausal patients, diagnosed with endometrial cancer between August 2003 and December 2016 and who had a postcontrast pelvic CT within 12 months prior to the ...
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Use of Postpartum Magnetic Resonance Imaging for Diagnosis and Classification of Retained Placenta Tissue
Objective To study the potential application of magnetic resonance imaging (MRI) for classification of retained placental tissue (RPT) in the uterus postnatally. Methods Twenty-two patients with clinically or pathologically proven RPT were studied. Results The thickness ratio (D1/D2) of invaded (D1) to normal (D2) myometrium could be categorized into 3 groups (>0.6, 0.1–0.6, and (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Newly Categorized Seromucinous Tumor of the Ovary: Magnetic Resonance Imaging Findings
Conclusions The imaging features of seromucinous tumors varied by tumor type. More than half of tumors were accompanied by endometriosis. High T2-weighted SI of the solid portion could be a specific feature of borderline tumors. It is hard to differentiate seromucinous carcinomas from other endometriosis-related carcinomas. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Prevalence and Natural History of Coronary Ostial Aneurysms in Marfan Patients
Conclusions Coronary ostial aneurysms were common in Marfan patients after aortic root replacement. These findings remain stable over time and may have little clinical consequence. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Cardiac and Thoracic Imaging Source Type: research

Accuracy of Digital Tomosynthesis of the Chest in Detection of Interstitial Lung Disease Comparison With Digital Chest Radiography
Purpose The aim of the study was to assess the ability of chest digital tomosynthesis (DTS) for detection of interstitial lung disease (ILD) compared with conventional chest radiography. Materials and Methods We retrospectively reviewed 78 patients (60 males, 18 females, mean age = 53.05 years, range, 19–83 years) who underwent chest DTS for a 5-year interval (January 1, 2009–December 31, 2014). Of the 78 patients, 33 (42.3%) carried a diagnosis of ILD and 45 (57.7%) were not ILD. All computed tomography reports and medical records were reviewed. The conventional chest radiography and DTS were separately r...
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Cardiac and Thoracic Imaging Source Type: research

Fetal Cardiac Functional Assessment by Fetal Heart Magnetic Resonance Imaging
Conclusions There was no significant difference in descending aorta blood flow measurements between ultrasonography and MRI, but the EF showed a significant between-group difference. In the normal group, the variation of EF and blood flow measured by MRI was significantly smaller compared with those of ultrasonography. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Cardiac and Thoracic Imaging Source Type: research

Predictive Features for Anterior Mediastinal Mass Diagnoses
Conclusions Nine demographic and imaging features were found to be helpful in diagnosing anterior mediastinal masses. By using these features, radiologists can suggest the diagnosis with fair accuracy. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Cardiac and Thoracic Imaging Source Type: research

Computerized Image Analysis to Differentiate Benign and Malignant Breast Tumors on Magnetic Resonance Diffusion Weighted Image: A Preliminary Study
Purpose This work aims to determine the feasibility of using a computer-aided diagnosis system to differentiate benign and malignant breast tumors on magnetic resonance diffusion-weighted image (DWI). Materials and Methods Institutional review board approval was obtained. This retrospective study included 76 patients who underwent breast magnetic resonance imaging before neoadjuvant chemotherapy from March 10, 2017, to October 12, 2017, with a total of 80 breast tumors including 40 cases of breast cancers and 40 cases of benign breast tumors. The textural features of DWI images were analyzed. The area under the receiv...
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Breast Imaging Source Type: research

Assessment of Quantitative Magnetic Resonance Imaging Background Parenchymal Enhancement Parameters to Improve Determination of Individual Breast Cancer Risk
Conclusions Elevated quantitative BPE parameters, related to both area and intensity of enhancement, are associated with breast cancer development. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Breast Imaging Source Type: research

Superiority of Multidetector Computed Tomography With 3-Dimensional Volume Rendering Over Plain Radiography in the Assessment of Spinal Surgical Instrumentation Complications in Patients With Cancer
Conclusions Multidetector computed tomography with VRTLD series seems best for evaluation of spinal instrumentation after tumor resection and reconstruction. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Whole-Body Imaging Source Type: research

Whole-Body Magnetic Resonance Imaging in the Oncology Setting: An Overview and Update on Recent Advances
Whole-body magnetic resonance imaging is becoming an important tool in oncology as a nonirradiating imaging technique since recent technological advances allowed the incorporation of high-quality imaging in an adequate time. Moreover, the noninjection of radioisotope/intravenous contrast, low cost compared with traditional nuclear medicine techniques, and fast acquisition times are another distinct feature. Thus, the purpose of this article is to review the whole-body magnetic resonance imaging protocol and its main applications in the oncology setting. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Whole-Body Imaging Source Type: research

Effect of Statistically Iterative Image Reconstruction on Vertebral Bone Strength Prediction Using Bone Mineral Density and Finite Element Modeling: A Preliminary Study
Statistical iterative reconstruction (SIR) using multidetector computed tomography (MDCT) is a promising alternative to standard filtered back projection (FBP), because of lower noise generation while maintaining image quality. Hence, we investigated the feasibility of SIR in predicting MDCT-based bone mineral density (BMD) and vertebral bone strength from finite element (FE) analysis. The BMD and FE-predicted bone strength derived from MDCT images reconstructed using standard FBP (FFBP) and SIR with (FSIR) and without regularization (FSIRB0) were validated against experimental failure loads (Fexp). Statistical iterative r...
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Magnetic Resonance Arthrographic Demonstration of Association of Superior Labrum Anterior and Posterior Lesions With Extended Anterior Labral Tears
Conclusions Isolated anterior labral tears are less than expected. In majority of the cases, a distinct tear at a different site of the labrum accompanies the anterior labral tear. Massive anterior labral tears are mostly seen together with SLAP lesions. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Contrast-enhanced Magnetic Resonance Imaging of Pelvic Bone Metastases at 3.0 T: Comparison Between 3-dimensional T1-weighted CAIPIRINHA-VIBE Sequence and 2-dimensional T1-weighted Turbo Spin-Echo Sequence
Conclusions Our results suggest that CAIPIRINHA-VIBE may be superior to turbo spin-echo for contrast-enhanced MRI of pelvic bone metastases at 3.0 T. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Evaluation of a Computer-Aided Diagnosis System for Automated Bone Age Assessment in Comparison to the Greulich-Pyle Atlas Method: A Multireader Study
Conclusion A novel version of a CAD system enables highly accurate automated BA assessment. The assessment of carpal bones revealed lower precision and interreader agreement. Therefore, methods determining BA without analyzing carpal bones may be more precise and accurate. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Current Update on Desmoid Fibromatosis
Conclusions Desmoid fibromatosis is a rare soft tissue neoplasm with a high incidence of local recurrence. Imaging plays an important role in the diagnosis and management of this disease. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Evaluating the Prognosis of Ischemic Stroke Using Low-Dose Multimodal Computed Tomography Parameters in Hyperacute Phase
Purpose The aim of this study was to evaluate the potential value of low-dose multimodal computed tomography (CT) in predicting prognosis of acute ischemic stroke (AIS) within 6 hours. Methods The admission “one-stop-shop” multimodal CT examination, including noncontrast CT (NCCT), low-dose CT perfusion, and CT angiography (CTA), was performed in patients with symptoms of stroke within 6 hours. Noncontrast CT, CTA source image (CTA-SI), cerebral blood flow (CBF), cerebral blood volume (CBV), time to peak (TTP), and mean transit time (MTT) maps were studied using Alberta Stroke Program Early CT Score (ASPEC...
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Automated Early Identification of an Excessive Air-in-Oil X-ray Tube Artifact That Mimics Acute Cerebral Infarct
Conclusions Serious clinical problems associated with AIO artifact can be detected and avoided by incorporating NPS average frequency measurements of daily phantom images into an automated QC program. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Differentiation of Glioblastoma and Solitary Brain Metastasis by Gradient of Relative Cerebral Blood Volume in the Peritumoral Brain Zone Derived from Dynamic Susceptibility Contrast Perfusion Magnetic Resonance Imaging
Objective The purpose of our study was to evaluate the efficacy of the relative cerebral blood volume (rCBV) gradient in the peritumoral brain zone (PBZ)—the difference in the rCBV values from the area closest to the enhancing lesion to the area closest to the healthy white matter—in differentiating glioblastoma (GB) from solitary brain metastasis (MET). Methods A 3.0-T magnetic resonance imaging (MRI) machine was used to perform dynamic susceptibility contrast perfusion MRI (DSC-MRI) on 43 patients with a solitary brain tumor (24 GB, 19 MET). The rCBV ratios were acquired by DSC-MRI data in 3 regions of t...
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Standardizing Magnetic Resonance Imaging Protocols, Requisitions, and Reports in Multiple Sclerosis: An Update for Radiologist Based on 2017 Magnetic Resonance Imaging in Multiple Sclerosis and 2018 Consortium of Multiple Sclerosis Centers Consensus Guidelines
The advent of magnetic resonance imaging has improved our understanding of the pathophysiology and natural course of multiple sclerosis (MS). The ability of magnetic resonance imaging to show the evolution of MS lesions on sequential scans has brought it to be one of the endpoints in clinical trials for disease-modifying therapies. Based on the most updated consensus guidelines from the American (Consortium of MS Centers) and European (Magnetic Resonance Imaging in MS) boards of experts in MS, this document shows the most relevant landmarks related to imaging findings, diagnostic criteria, indications to obtain a magnetic ...
Source: Journal of Computer Assisted Tomography - January 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Torsional Anatomy of the Lower Limb: The Appearance of Anatomy in Hemispastic Position
Conclusions Sonographic imaging allows a better localization of muscles associated with spasticity and can instruct the clinician to alter usual injection pathways. This article documents visual evidence that previous assumptions for injection strategies require updating. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Graphic Anatomy Source Type: research

Adaptive Nonlocal Means Method for Denoising Basis Material Images From Dual-Energy Computed Tomography
We propose an adaptive nonlocal means approach for image-domain material decomposition in low-dose dual-energy micro–computed tomography. The key idea is to create a distribution map for decomposition error and assign a smooth weight for a given pixel. This method is applied to the decomposed images of 3 basis materials: bone, soft tissue, and gold in our applications. We assume that bone and gold cannot coexist in the same pixel and regroup these basis materials into 2 categories. For soft tissue, the proposed algorithm is implemented in a noniterative mode. For bone and gold, an iterative mode is used and followed ...
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Technical Developments in Dual Energy CT Source Type: research

Accuracy of Quantification of Iodine and Hounsfield Unit Values on Virtual Monochromatic Imaging Using Dual-Energy Computed Tomography: Comparison of Dual-Layer Computed Tomography With Fast Kilovolt-Switching Computed Tomography
Conclusions Overall, the accuracy of iodine and HU values was higher for DLCT than for FKSCT. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Technical Developments in Dual Energy CT Source Type: research

Phantom Validation of Spectral Detector Computed Tomography–Derived Virtual Monoenergetic, Virtual Noncontrast, and Iodine Quantification Images
Conclusion Reconstructions of SDCT show lower VME image noise, accurate iodine quantification, and VNC attenuation values within 5 HU of expected in a phantom model. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Technical Developments in Dual Energy CT Source Type: research

Dual-Energy Spectral Computed Tomography With Adaptive Statistical Iterative Reconstruction for Improving Image Quality of Portal Venography
Objective The aim of the study was to investigate whether spectral computed tomography (CT) plus adaptive statistical iterative reconstruction (ASIR) could improve imaging quality of computed tomography portal venography (CTPV). Methods Sixty-four patients underwent CTPV, with CT number of portal vein (PV) less than 150 HU in portal phase, were divided into 2 groups A (n = 31), using standard 120-kVp protocol. group B (n = 33), using spectral CT protocol. Standard 120-kVp images were reconstructed with 40% ASIR, and monochromatic images at 60 keV were reconstructed with the following 4 ASIR percentages: 0%, 20%, 40%, ...
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Abdominal Applications of Dual Energy CT Source Type: research

Mixed Imaging on Port-Venous Phase of Contrast-Enhanced Dual-Source Dual-Energy Computed Tomography: A Measurement Method Based on Couinaud Segments
Objective The aim of this study was to evaluate the changes of the iodine value quantified on the Couinaud segments measured in port-venous phase using the iodine-mixed technique of contrast-enhanced dual-source dual-energy computed tomography (CT) scanning in different Child-Pugh stages of hepatitis B–induced liver cirrhosis. Methods Patients clinically diagnosed with hepatitis B–induced cirrhosis were prospectively engaged in our study. Each patient underwent multiphase iodine agent contrast-enhanced dual-source dual-energy CT scanning, and then the iodine-mixed imaging of port-venous phase was postproce...
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Abdominal Applications of Dual Energy CT Source Type: research

Dual-Energy Computed Tomography in Patients With Small Hepatocellular Carcinoma: Utility of Noise-Reduced Monoenergetic Images for the Evaluation of Washout and Image Quality in the Equilibrium Phase
Conclusions Virtual monoenergetic image reconstructed with nMERA 50+ was most appropriate to detect washout of small HCCs. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Abdominal Applications of Dual Energy CT Source Type: research

Dual-Source Dual-Energy CT Portal Venous Phase Abdominal CT Scans in Large Body Habitus Patients: Preliminary Observations on Image Quality and Material Decomposition
Purpose Our objective was to evaluate image quality (IQ) and material decomposition in patients with large body habitus undergoing portal venous phase abdominal computed tomography (CT) scans on dual-source dual-energy CT (dsDECT) scanners. Methods This retrospective analysis included 30 scans from consecutive patients (19 males/11 females, mean ± SD age = 55.3 ± 17.5 years, range = 27–87 years) with large body habitus (≥90 kg, mean ± SD weight = 105.4 ± 12.35, range = 91–145 kg) who underwent portal venous phase abdominal DECT examinations on dsDECT scanner between Jan 2015 ...
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Abdominal Applications of Dual Energy CT Source Type: research

Virtual Monoenergetic Images for Diagnostic Assessment of Hypodense Lesions Within the Liver: Semiautomatic Estimation of Window Settings Using Linear Models
Conclusions The increase in attenuation and SNR on low-keV VMIs requires adjustment of C/W, and they can be estimated in dependency of HUliv using linear models. Reference values for standard display of VMIs of 40 to 120 keV are reported. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Abdominal Applications of Dual Energy CT Source Type: research

Measurement of Vascular Diameter in Computed Tomography Angiography With Reduced Iodine Load: Comparison of Virtual Monochromatic Imaging in Dual-Energy Computed Tomography and Conventional Polychromatic Scan In Vitro
Conclusions Acquisition of images by VMI at low energy facilitates accurate measurement of diameters of poorly enhanced vessels with reduced iodine load but can increase measurement errors in other situations by decreasing spatial resolution, so VMI should be applied carefully to evaluate vessel diameter. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Cardiovascular Applications of Dual Energy CT Source Type: research

Effect of Virtual Monoenergetic Images From Spectral Detector Computed Tomography on Coronary Calcium Blooming
Conclusions Calcium blooming significantly decreases at higher monoenergetic levels from SDCT, increasing luminal dimensions and decreasing stenotic grading, with best overall subjective image quality using 80-keV VMI. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Cardiovascular Applications of Dual Energy CT Source Type: research

The Value of 16-cm Wide-Detector Computed Tomography in Coronary Computed Tomography Angiography for Patients With High Heart Rate Variability
Objective The aim of this study was to investigate radiation dose and image quality of coronary computed tomography (CT) angiography (CCTA) for patients with high heart rate variability (HRv) using 16-cm wide-detector CT scanner. Methods One hundred sixty-six patients with uncontrolled heart rate underwent CCTA on a 16-cm wide-detector CT system and were divided into 2 groups based on their HRv for analysis: group A (n = 95, HRv ≤10 beats/min [bpm]) and group B (n = 71, HRv>10 bpm). Images in both groups were reconstructed with motion correction algorithm. Subjective and objective image qualities were analyzed. ...
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Cardiovascular Applications of Dual Energy CT Source Type: research

Assessing the Relationship Between American Heart Association Atherosclerotic Cardiovascular Disease Risk Score and Coronary Artery Imaging Findings
Conclusions There is some concordance but not a perfect overlap between 10-year ASCVD risk scores and coronary artery imaging findings. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Cardiovascular Applications of Dual Energy CT Source Type: research

Coronary Artery Calcium Scoring: Current Status and Review of Literature
Coronary artery calcium is a marker of overall atherosclerotic plaque burden, corresponding to approximately 20% overall atherosclerotic plaque burden. Coronary artery calcium screening, most commonly performed using the Agatston score, has been shown to be a predictor of future cardiovascular risk independent of conventional risk scores such as the Framingham risk score. Coronary artery calcium screening is also recommended on routine nongated, noncontrast chest computed tomography scans using several ordinal and visual scoring systems. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Cardiovascular Applications of Dual Energy CT Source Type: research

Heterogeneous Pulmonary Perfusion on Dual-Energy Computed Tomography: Faulty Postprocessing or New Artifact?
We report a new imaging artifact or faulty image postprocessing in a commercially available rapid kV switching technique of dual-energy computed tomography, which can confound its clinical utility for evaluation of iodine uptake. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Pulmonary and Thoracic Applications of Dual Energy CT Source Type: research

CT Window Blending for Evaluation of Multicompartmental Thoracic Pathology
Standard computed tomography windows are limited in the thorax because they can only display 1 tissue at a time. Computed tomography window blending allows for simultaneous viewing of all 3 tissues in a single image, which may improve evaluation of diseases that contiguously affect multiple compartments. In this article, we use examples to illustrate the utility of window blending in aggressive infections, metastatic cancer, and penetrating trauma. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Pulmonary and Thoracic Applications of Dual Energy CT Source Type: research

Iodine Quantification Using Dual-Energy Computed Tomography for Differentiating Thymic Tumors
Purpose The aim of the study was to explore the efficacy of iodine quantification with dual-energy computed tomography (DECT) in differentiating thymoma, thymic carcinoma, and thymic lymphoma. Materials and Methods Fifty-seven patients with pathologically confirmed low-risk thymoma (n = 16), high-risk thymoma (n = 15), thymic carcinoma (n = 14), and thymic lymphoma (n = 12) underwent chest contrast-enhanced DECT scan were enrolled in this study. Tumor DECT parameters including iodine-related Hounsfield unit (IHU), iodine concentration (IC), mixed HU (MHU), and iodine ratio in dual phase, slope of energy spectral HU cu...
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Pulmonary and Thoracic Applications of Dual Energy CT Source Type: research

Quantitative Dual-Energy Computed Tomography Predicts Regional Perfusion Heterogeneity in a Model of Acute Lung Injury
Objective The aims of this study were to investigate the ability of contrast-enhanced dual-energy computed tomography (DECT) for assessing regional perfusion in a model of acute lung injury, using dynamic first-pass perfusion CT (DynCT) as the criterion standard and to evaluate if changes in lung perfusion caused by prone ventilation are similarly demonstrated by DECT and DynCT. Methods This was an institutional review board–approved study, compliant with guidelines for humane care of laboratory animals. A ventilator-induced lung injury protocol was applied to 6 landrace pigs. Perfused blood volume (PBV) and pul...
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Pulmonary and Thoracic Applications of Dual Energy CT Source Type: research

Evaluation of Virtual Monoenergetic Images on Pulmonary Vasculature Using the Dual-Layer Detector-Based Spectral Computed Tomography
Objective To evaluate the ability of retrospectively generated virtual monoenergetic images (VMIs) from the detector-based spectral computed tomography (SDCT) to augment pulmonary artery enhancement in CT and if iodine map can predict the optimal monoenergetic level. Methods The study included 79 patients with contrast-enhanced chest CT scans on an SDCT scanner. Conventional 120-kVp images and VMI from 40 to 80 keV were generated. Attenuation, noise, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) were measured at 7 different locations in the pulmonary arterial system. The iodine concentration (in milli...
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Pulmonary and Thoracic Applications of Dual Energy CT Source Type: research

Spectral Detector Computed Tomography Pulmonary Angiography: Improved Diagnostic Assessment and Automated Estimation of Window Settings Angiography of Pulmonary Arteries From Novel Spectral Detector Computed Tomography Provides Improved Image Quality if Settings are Adjusted
Conclusions The VMIs from spectral detector computed tomography improve objective and subjective IQ in angiography of the pulmonary arteries, if window settings are adjusted; they can be automatically estimated using reported linear models. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Pulmonary and Thoracic Applications of Dual Energy CT Source Type: research

Navigating the Pulmonary Perfusion Map: Dual-Energy Computed Tomography in Acute Pulmonary Embolism
Pulmonary embolism is the third most common acute cardiovascular disease. Dual-energy computed tomography perfusion imaging is a promising adjunct in the detection of acute PE providing simultaneous functional assessment of pulmonary perfusion alongside the high-resolution morphological information from computed tomography pulmonary angiography. We review the evidence to date and common causes of perfusion defects including artifacts, parenchymal, and vascular causes, and discuss its potential in furthering our understanding of physiology and pathophysiology in acute pulmonary embolism. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Pulmonary and Thoracic Applications of Dual Energy CT Source Type: research

Dual-Energy Computed Tomography Applications in Neurointervention
Dual-energy computed tomography (CT) combines the high spatial resolution of standard CT with the ability to improve contrast resolution, reduce artifact, and separate materials of different atomic weights and energy-based attenuation through postprocessing. We review the underlying physical principles and applications of dual-energy CT within the context of patients undergoing preprocedural and postprocedural evaluation for neurointerventional therapies. The broad imaging categories of cerebral ischemia and hemorrhage, head and neck angiography, and the spine are reviewed. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Neuroradiology Applications of Dual Energy CT Source Type: research

How to Incorporate Dual-Energy Computed Tomography Into Your Neuroradiology Practice: Questions and Answers
This article reviews in a question-and-answer format common issues that arise when incorporating DECT into a busy neuroradiology practice. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2018 Category: Radiology Tags: Neuroradiology Applications of Dual Energy CT Source Type: research