Myxoinflammatory Fibroblastic Sarcoma: Clinical, Imaging, Management and Outcome in 29 Patients
Conclusions: Myxoinflammatory fibroblastic sarcoma, a rare low-grade subcutaneous soft tissue tumor of distal extremities with high local recurrence after resection can mimic several benign and malignant lesions on histopathology and imaging. Rarely, it can arise in muscles and tendons, occur in nonacral sites, be aggressive, and even metastasize. In most cases, surgical resection with wide margins can be curative with low local recurrence. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Musculoskeletal Radiology Source Type: research

Systematic Review on the Additional Value of 18F-Fluoro-2-Deoxy-D-Glucose Positron Emission Tomography in Staging Follicular Lymphoma
Conclusions: Although upstaging by FDG-PET compared with CT occurs in a considerable proportion of patients, the available studies on this topic have numerous methodological errors. Data on FDG-PET–induced FLIPI risk stratification changes relative to CT are lacking. Future well-designed studies are needed before FDG-PET can be recommended for routine pretreatment staging of follicular lymphoma. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Whole Body Imaging Source Type: research

Radiologic and Clinicopathologic Findings of Inflammatory Myofibroblastic Tumor
Conclusions: Inflammatory myofibroblastic tumor can involve any part of the body, and the clinical and radiological appearances are various owing to different anatomic sites. An ill-defined soft tissue mass heterogeneous enhancement with or without invasion into adjacent structures on computed tomographic or magnetic resonance images and positive staining for SMA and vimentin on immunohistochemical examination could suggest the diagnosis. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Whole Body Imaging Source Type: research

Noise Power Characteristics of a Micro–Computed Tomography System
Conclusions: The noise power properties investigated in this study provide important image quality references for refined cone beam system development, optimization, and operations. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Physics and Image Processing Source Type: research

How Different Iterative and Filtered Back Projection Kernels Affect Computed Tomography Numbers and Low Contrast Detectability
Conclusions: Iterative reconstruction improved contrast-to-noise ratio in most cases, but in certain situations, it decreased it. Variations in CT numbers can be large between kernels with similar sharpness for certain densities. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Physics and Image Processing Source Type: research

Evaluation of Abdominal Computed Tomography Image Quality Using a New Version of Vendor-Specific Model-Based Iterative Reconstruction
Purpose: To qualitatively and quantitatively compare abdominal computed tomography (CT) images reconstructed with a new version of model-based iterative reconstruction (Veo 3.0; GE Healthcare) to those created with Veo 2.0. Materials and Methods: This retrospective study was approved by our institutional review board and was Health Insurance Portability and Accountability Act compliant. The raw data from 29 consecutive patients who had undergone CT abdomen scanning was used to reconstruct 4 sets of 3.75-mm axial images: Veo 2.0, Veo 3.0 standard, Veo 3.0 5% resolution preference (RP), and Veo 3.0 20% RP. A slice thickness...
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Physics and Image Processing Source Type: research

Acute Symptomatic Hyponatremia After Computed Tomography Renal Protocol
Abstract: Computed tomography (CT) is a widely used imaging modality. Although hyponatremia after CT imaging is rare, its effects can be devastating. Hyperosmolar radiocontrast acts as effective osmoles and causes fluid migration from intracellular into extracellular compartment. Dilutional hyponatremia will ensue if translocation of fluid is in excess of diuresis. This case report detailed an unusual case of acute symptomatic hyponatremia after CT renal protocol and the treatments given after its recognition. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Left Colonic Bleeding Secondary to Inferior Mesenteric Vein Stenosis
We present a case of a 50-year-old man diagnosed as having intermittent left colonic bleeding from mesenteric varices due to a critical stenosis at the portal vein–inferior mesenteric vein confluence. This case illustrates a multimodality imaging approach to arrive at the diagnosis with a brief discussion of an atypical endovascular intervention. At the conclusion, we suspect that venous stenting may be suboptimal in treating mesenteric variceal bleeding and recurrence is likely unavoidable. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Multidetector Computed Tomography Evaluation of Mesenteric Venous Thrombosis Following Laparoscopic Bariatric Surgery
Conclusions: Mesenteric venous thrombosis is an increasingly recognized complication of laparoscopic bariatric surgery. Awareness demands that postbariatric surgery patients with acute abdominal pain be studied with intravenous contrast material. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Computed Tomography Features of Appendiceal Metastasis in Patients With Underlying Malignancy: Comparison With Pathological Findings
Objective: To evaluate the computed tomography (CT) findings compared with pathologic features and to determine whether CT findings are useful for diagnosis of appendiceal metastasis in patients with underlying malignancy. Materials and Methods: Preoperative CT examinations of 59 patients who had underlying malignancy and underwent appendectomy were evaluated. Appendiceal metastasis (n = 21) and nonmetastasis (n = 38) were pathologically confirmed. Computed tomography features (appendiceal morphology and diameter, presence of ascites, rectal shelf, omental cake, lymphadenopathy or organ metastasis) were retrospectively re...
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Use of a Noise Optimized Monoenergetic Algorithm for Patient-Size Independent Selection of an Optimal Energy Level During Dual-Energy CT of the Pancreas
Purpose: To investigate the impact of a second-generation noise-optimized monoenergetic algorithm on selection of the optimal energy level, image quality, and effect of patient body habitus for dual-energy multidetector computed tomography of the pancreas. Materials and Methods: Fifty-nine patients (38 men, 21 women) underwent dual-energy multidetector computed tomography (80/Sn140 kV) in the pancreatic parenchymal phase. Image data sets, at energy levels ranging from 40 to 80 keV (in 5-keV increments), were reconstructed using first-generation and second-generation noise-optimized monoenergetic algorithm. Noise, pancreat...
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

CT Differentiation of Female Peritoneal Tuberculosis and Peritoneal Carcinomatosis From Normal-Sized Ovarian Cancer
Objective: The purpose of this study was to analyze the computed tomography (CT) features of female peritoneal tuberculosis and peritoneal carcinomatosis from normal-sized ovarian cancer for their differentiation. Materials and Methods: We analyzed the CT features of 18 female peritoneal tuberculosis and 17 peritoneal carcinomatosis with proven normal-sized ovarian carcinomas. Omental change, mesenteric change, parietal peritoneal thickening, lymph node enlargement, ascites, ovarian CT attenuation, and ovarian capsular change were analyzed. Results: Heterogeneous parenchymal hyperattenuation and capsular change of the ov...
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Performance of Gadoxetic Acid–Enhanced Liver Magnetic Resonance Imaging for Predicting Patient Eligibility for Liver Transplantation Based on the Milan Criteria
Conclusions: Gd-EOB-MRI showed high specificity but poor sensitivity for assessing transplant eligibility based on MC when adopting the conventional radiological hallmarks of HCC. Our modified criteria showed significantly better sensitivity and accuracy than the conventional radiological hallmarks. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Improving Detection of Iron Deposition in Cirrhotic Liver Using Susceptibility-Weighted Imaging With Emphasis on Histopathological Correlation
Conclusions: Susceptibility-weighted imaging can improve detection of minimal and mild iron deposition in cirrhotic liver. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Computed Tomography Study of the Feet of Mummy of Ramesses III: New Insights on the Harem Conspiracy
Conclusions: The Pharaoh's left big toe was likely chopped perimortem by an assailant using a heavy sharp instrument as an ax. This additional injury supports the plot and gives more information about the death scene. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Special Articles Source Type: research

White Paper of the Society of Computed Body Tomography and Magnetic Resonance on Dual-Energy CT, Part 4: Abdominal and Pelvic Applications
This article, part 4, discusses DECT for abdominal and pelvic applications and, at the end of each, will offer our consensus opinions on the current clinical utility of the application and opportunities for further research. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Special Articles Source Type: research

White Paper of the Society of Computed Body Tomography and Magnetic Resonance on Dual-Energy CT, Part 3: Vascular, Cardiac, Pulmonary, and Musculoskeletal Applications
Abstract: This is the third of a series of 4 white papers that represent Expert Consensus Documents developed by the Society of Computed Body Tomography and Magnetic Resonance through its Task Force on dual-energy computed tomography. This paper, part 3, describes computed tomography angiography and thoracic, cardiac, vascular, and musculoskeletal clinical applications. At the end of the discussion of each application category (vascular, cardiac, pulmonary, and musculoskeletal), we present our consensus opinions on the current clinical utility of the application and opportunities for further research. (Source: Journal of C...
Source: Journal of Computer Assisted Tomography - January 1, 2017 Category: Radiology Tags: Special Articles Source Type: research

MIP Improves Detection of Brain Metastases
Conclusions: In our study, we found that using MIP-3DT1 reconstructions of previously obtained postcontrast 3DT1W improved detection of brain metastases. This improvement was experienced by both the junior and experienced neuroradiologists and was also better at 3.0 T than at 1.5 T. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Imaging of Ventriculoperitoneal Shunt Complications: Comparison of Whole Body Low-Dose Computed Tomography and Radiographic Shunt Series
Objective: To determine diagnostic value and radiation exposure of low-dose computed tomography (LD-CT) compared to radiographic shunt series (SS) for the detection of ventriculoperitoneal (VP) shunt complications. Methods: Fourteen VP shunts were implanted in 7 swine cadavers. Mechanical complications were induced in 50% of VP shunts. Low-dose CT (80 kVp, 10 mAs, Pitch = 1.5) and SS were acquired. Dose area product (DAP) and effective doses for SS and LD-CT were collected. Scoring of diagnostic confidence and blinded readings of SS and CT data were performed. Results: The sensitivity of LD-CT was high (0.97; 95% confide...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Contrast-Enhanced Dixon Fat-Water Separation Imaging of the Spine: Added Value of Fat, In-Phase and Opposed-Phase Imaging in Marrow Lesion Detection
Conclusions: Contrast-enhanced FO, WO, and OP outperform traditional techniques, providing reliable lesion characterization and highest conspicuity. In-phase imaging offered limited impact on the subjective assessment of enhancement. The added value and robustness of FWD, particularly the unique contrast provided by FO imaging, suggests consideration for routine use for postgadolinium spine imaging. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Baseline Cartilage Thickness and Meniscus Extrusion Predict Longitudinal Cartilage Loss by Quantitative Magnetic Resonance Imaging: Data From the Osteoarthritis Initiative
This study aimed to assess how meniscus damage and baseline cartilage thickness influence the rate of cartilage loss and knee pain. Methods: Of 4796 participants in the Osteoarthritis Initiative, 86 had baseline and 48-month follow-up quantitative magnetic resonance imaging data for medial compartment cartilage thickness. Baseline meniscus pathology was scored by a musculoskeletal radiologist using Whole-Organ Magnetic Resonance Imaging Score. Findings were correlated with 72-month Knee injury and Osteoarthritis Outcome Score. Results: Univariate analysis showed cartilage change was not influenced by demographic variable...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Computed Tomography Imaging of a Hip Prosthesis Using Iterative Model-Based Reconstruction and Orthopaedic Metal Artefact Reduction: A Quantitative Analysis
Objectives: To quantify the combined use of iterative model-based reconstruction (IMR) and orthopaedic metal artefact reduction (O-MAR) in reducing metal artefacts and improving image quality in a total hip arthroplasty phantom. Methods: Scans acquired at several dose levels and kVps were reconstructed with filtered back-projection (FBP), iterative reconstruction (iDose4) and IMR, with and without O-MAR. Computed tomography (CT) numbers, noise levels, signal-to-noise-ratios and contrast-to-noise-ratios were analysed. Results: Iterative model-based reconstruction results in overall improved image quality compared to iDose...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

256 Slice Multi-detector Computed Tomography Thoracic Aorta Computed Tomography Angiography: Improved Luminal Opacification Using a Patient-Specific Contrast Protocol and Caudocranial Scan Acquisition
Clinical Relevance Statement: Caudocranial scan direction and contrast injection timing based on measured patient vessel dynamics can significantly improve arterial and aneurysmal opacification and reduce both contrast and radiation dose in the assessment of thoracic aortic aneurysms (TAA) using helical thoracic computed tomography angiography (CTA). Objectives: To investigate opacification of the thoracic aorta and TAA using a caudocranial scan direction and a patient-specific contrast protocol. Materials and Methods: Thoracic aortic CTA was performed in 160 consecutive patients with suspected TAA using a 256-slice comp...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Adaptive Statistical Iterative Reconstruction-V: Impact on Image Quality in Ultralow-Dose Coronary Computed Tomography Angiography
This study evaluates the impact of ASiR-V on signal, noise and image quality in CCTA. Methods: Sixty-five patients underwent clinically indicated CCTA on a 256-slice CT scanner using an ultralow-dose protocol. Data sets from each patient were reconstructed at 6 different levels of ASiR-V. Signal intensity was measured by placing a region of interest in the aortic root, LMA, and RCA. Similarly, noise was measured in the aortic root. Image quality was visually assessed by 2 readers. Results: Median radiation dose was 0.49 mSv. Image noise decreased with increasing levels of ASiR-V resulting in a significant increase in sig...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Optimized Protocol for Fast CT Angiography of Lower Limbs Using 160-Row Detector
Conclusions: An optimized protocol for performing a fast acquisition computed tomography angiography of lower limbs is feasible, has sufficient diagnostic quality, and can be used in selected patients who would benefit from a short-time scan. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Arterial and Venous Pulmonary Vascular Morphology and Their Relationship to Findings in Cardiac Magnetic Resonance Imaging in Smokers
Conclusions: Lobar assessment and segmentation of the parenchymal vasculature into arterial and venous components provide additional information about the relationship between loss of vasculature on CT scans and right ventricular dysfunction. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Low-Contrast and Low-Radiation Dose Protocol in Cardiac Computed Tomography: Usefulness of Low Tube Voltage and Knowledge-Based Iterative Model Reconstruction Algorithm
This study aimed to evaluate the feasibility of a low contrast, low-radiation dose protocol of 80-peak kilovoltage (kVp) with prospective electrocardiography-gated cardiac computed tomography (CT) using knowledge-based iterative model reconstruction (IMR). Methods: Thirty patients underwent an 80-kVp prospective electrocardiography-gated cardiac CT with low-contrast agent (222-mg iodine per kilogram of body weight) dose. We also enrolled 30 consecutive patients who were scanned with a 120-kVp cardiac CT with filtered back projection using the standard contrast agent dose (370-mg iodine per kilogram of body weight) as a hi...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Evaluation of Left Ventricular Outflow Tract Obstruction With Four-Dimensional Phase Contrast Magnetic Resonance Imaging in Patients with Hypertrophic Cardiomyopathy—A Pilot Study
Conclusions: The 4D PC MRI can assess for LVOT obstruction in HCM patients. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Cardiovascular Imaging Source Type: research

Risk Factors for False-Negative and False-Positive Results of Magnetic Resonance Computer-Aided Evaluation in Axillary Lymph Node Staging
Conclusions: Tumor margin and lymphovascular invasion are the key factors that affect the false MR-CAE results in ALN staging. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Radiological Evaluation of Artificial Stone Silicosis Outbreak: Emphasizing Findings in Lung Transplant Recipients
Objective: The aim of this study was to describe the computed tomography (CT) findings and correlate pulmonary function tests (PFTs) of silicosis patients with emphasis on the findings in lung transplantation (LTX) recipients. Methods: We studied the chest CT scans from 82 marble workers exposed to artificial stone dust and who had a diagnosis of silicosis, of whom 13 patients underwent LTX. Silicosis-associated findings were graded and correlated to concomitant PFT. Results: A statistically significant inverse relationship was found between chest CT scores and PFT including forced expired volume in the first second (r =...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Pulmonary Legionellosis in Oncologic Patients: Findings on Chest CT
Conclusions: Findings in L. pneumophila pneumonia and non–pneumophila Legionella pneumonia are similar but nonspecific. Airspace consolidation is almost always present; the halo sign is not uncommon. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Pulmonary Tuberculosis in Patients With Emphysema: Computed Tomography Findings
Objective: To evaluate the computed tomography (CT) findings and clinical characteristics of pulmonary tuberculosis (TB) in patients with emphysema, compared with those without emphysema. Materials and Methods: Thirty-nine patients (M:F = 36:3; mean age, 64.8 years) who were diagnosed with chronic obstructive pulmonary disease and had emphysema in pretreatment chest CT scans were included in this study (emphysema group). Their clinical presentation, laboratory findings, and CT findings were compared with those of 57 pulmonary TB patients without chronic obstructive pulmonary disease and emphysema (M:F = 52:5; mean age, 64...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Application of Gemstone Spectral Computed Tomography Imaging in the Characterization of Solitary Pulmonary Nodules: Preliminary Result
This study aimed to observe the value of computed tomography (CT) spectral imaging parameters in the diagnosis of solitary pulmonary nodules, during the contrast-enhanced early phase and late phase. Materials and Methods: This study was approved by the institutional review board and written informed consent was obtained from all patients. One hundred thirty-nine patients with solitary pulmonary nodules proved by pathology underwent double-phase enhanced CT scan using gemstone spectral imaging mode on a Discovery CT750 HD, and were divided into an active inflammatory group (43 cases), a malignant group (65 cases), and a tu...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Regional Lung Ventilation Analysis Using Temporally Resolved Magnetic Resonance Imaging
Conclusions: The proposed methods allow for 4D MR-based regional analysis of tissue dynamics and ventilation in spontaneous breathing and comparison of patient data. The proposed atlas-based reference coordinate system provides an automated manner of annotating and comparing multimodal lung image data. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Thoracic Imaging Source Type: research

Computed Tomography and Magnetic Resonance Imaging Findings in a Case of Colonic Intramural Hematoma After Mild Blunt Abdominal Trauma
We report on a 27-year-old man with right lower quadrant pain for 1 day after a mild blunt trauma sustained during a soccer match. Computed tomography and magnetic resonance imaging evaluation revealed an intramural hematoma of the right colon, subsequently confirmed and drained through laparoscopic surgery. Although computed tomography and magnetic resonance imaging findings in such a context are scarce in the radiological literature, imaging has an important role in the preoperative diagnosis and evaluation of the extent of bowel hematomas to assist in treatment planning. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Computed Tomography Appearance of Surgically Resected Adrenal Hematomas
Conclusions: Adrenal hematomas with a mass-like configuration offer a potential diagnostic dilemma for radiologists and surgeons. Although it is rare that an adrenal hemorrhage is surgically resected, awareness of the potential appearances of these lesions is important to spare patients from unnecessarily aggressive surgery. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

The Role of Computed Tomography Colonography in Detecting Bowel Involvement in Women With Deep Infiltrating Endometriosis: Comparison With Clinical History, Serum Ca125, and Transvaginal Sonography
Conclusions: CTC proved to be an accurate and low invasive imaging technique to detect DIE of the bowel and compared favorably with clinical evaluation, serum Ca125 determination, and TVS. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

JOG Technique Versus Nonspiral Axial Scan in Pancreatic Perfusion Computed Tomography Imaging and Their Preliminary Application
Objective: The aim of this study was to investigate the advantages and disadvantages of JOG technique in pancreatic perfusion computed tomography (CT) imaging. Methods: First, 40 male patients with nonpancreatic diseases, aged 40 to 60 years, were averagely assigned into 2 groups (A and B). Patients in group A and B underwent nonspiral axial perfusion and JOG technique CT scans of the pancreas, respectively. Second, 23 patients with pancreatic masses were randomly assigned into nonspiral axial scan and JOG groups. Results: There were no significant differences in all perfusion parameters among the pancreatic head, body, ...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Can Abdominal Computed Tomography Imaging Help Accurately Identify a Dedifferentiated Component in a Well-Differentiated Liposarcoma?
Conclusions: An enhancing or centrally necrotic nodule may be indicative of a dedifferentiated component in well-differentiated liposarcoma. Ground-glass density nodules may not be indicative of dedifferentiation. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Comparison of Knowledge-based Iterative Model Reconstruction and Hybrid Reconstruction Techniques for Liver CT Evaluation of Hypervascular Hepatocellular Carcinoma
Objective: The purpose of this work was to evaluate the image quality, lesion conspicuity, and dose reduction provided by knowledge-based iterative model reconstruction (IMR) in computed tomography (CT) of the liver compared with hybrid iterative reconstruction (IR) and filtered back projection (FBP) in patients with hepatocellular carcinoma (HCC). Methods: Fifty-six patients with 61 HCCs who underwent multiphasic reduced-dose CT (RDCT; n = 33) or standard-dose CT (SDCT; n = 28) were retrospectively evaluated. Reconstructed images with FBP, hybrid IR (iDose4), IMR were evaluated for image quality using CT attenuation and ...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Evaluation of Hepatocellular Carcinoma Tumor Response After Transcatheter Arterial Chemoembolization Using Gadobenate Dimeglumine–Enhanced Liver Magnetic Resonance
Objective: Use of gadobenate dimeglumine–enhanced liver magnetic resonance (MR) for evaluation of hepatocellular carcinoma tumor response after transcatheter arterial chemoembolization (TACE). Methods: Forty-five patients with hepatocellular carcinoma were imaged with multiphase gadobenate dimeglumine–enhanced MR examination at baseline and 1-month follow-up after TACE. Nodule size, enhancement, and apparent diffusion coefficient were measured for both examinations by 2 reviewers. Changes in tumor nodule size, enhancement, and apparent diffusion coefficient were evaluated using the Student t test. Results: Ni...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

Renal Cell Carcinoma: Accuracy of Multidetector Computed Tomography in the Assessment of Renal Sinus Fat Invasion
Purpose: The purpose of this study was to evaluate the accuracy of multidetector computed tomography (MDCT) in the preoperative assessment of renal sinus fat invasion (RSFI) in patients with renal cell carcinoma (RCC) and to assess imaging features that improve detection of RSFI on CT. Methods: This is a single-institution retrospective review of 53 consecutive patients with histologically proven RCC who underwent triple-phase preoperative contrast MDCT prior to partial or radical nephrectomy. Two experienced radiologists (R1 and R2), blinded to the final histology result, independently reviewed the preoperative MDCT stud...
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: Abdominal Imaging Source Type: research

White Paper of the Society of Computed Body Tomography and Magnetic Resonance on Dual-Energy CT, Part 2: Radiation Dose and Iodine Sensitivity
Abstract: This is the second of a series of 4 white papers that represent Expert Consensus Documents developed by the Society of Computed Body Tomography and Magnetic Resonance through its task force on dual-energy computed tomography. This paper, part 2, addresses radiation dose and iodine sensitivity in dual-energy computed tomography. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: x Source Type: research

White Paper of the Society of Computed Body Tomography and Magnetic Resonance on Dual-Energy CT, Part 1: Technology and Terminology
This article, part 1, describes the fundamentals of the physical basis for DECT and the technology of DECT and proposes uniform nomenclature to account for differences in proprietary terms among manufacturers. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2016 Category: Radiology Tags: x Source Type: research

Low-Dose Carotid Computed Tomography Angiography Using Pure Iterative Reconstruction
The aim of this study was to assess if a low-dose carotid computed tomography angiography (CTA) performed with pure iterative reconstruction (IR) is comparable to a conventional dose CTA protocol. Methods: Twenty patients were included. Radiation dose was divided into a low-dose acquisition reconstructed with pure IR and a conventional dose acquisition reconstructed with 40% hybrid IR. Dose, image noise, contrast resolution, spatial resolution, and carotid artery stenosis were measured. Results: Mean effective dose was significantly lower for low-dose than conventional dose studies (1.84 versus 3.71 mSv; P (Source: Journ...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Accelerated Brain Atrophy on Serial Computed Tomography: Potential Marker of the Progression of Alzheimer Disease
Conclusions: Brain volumetry on CT reliably detected accelerated volume loss in AD and significantly lower acceleration factor in age-matched non-AD patients, leading to the possibility of its use to monitor the progression of cognitive decline and dementia. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

The Initial Exploration of Adamkiewicz Artery Computed Tomographic Angiography With Monochromatic Reconstruction of Gemstone Spectral Imaging
Objective: The study aimed to explore whether optimal monochromatic reconstruction can improve the depiction of the Adamkiewicz artery (AKA) on gemstone spectral computed tomographic angiography (GSCTA) compared with the polychromatic reconstruction protocol. Methods: The prospective study was approved by the ethics committee, and written informed consent was obtained from each patient. The 58 consecutive patients suspected of aortic aneurysm or dissection underwent aortic GSCTA. All images were reconstructed with both polychromatic (group A) and optimal monochromatic (group B) protocol. The CT values of the descending ao...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Spectroscopic Characterization of Gliosarcomas—Do They Differ From Glioblastomas and Metastases?
Objective: To evaluate the spectroscopic pattern of gliosarcomas for differentiation from glioblastomas or metastases. Methods: 1H-nuclear magnetic resonance (NMR) spectroscopic intermediate echo time data of 5 patients with histologically proven gliosarcomas were compared with data of 17 metastases and 54 glioblastomas. Specialized 1H-NMR spectroscopy analysis software was used offline. Lipid and macromolecular resonances between 0.9 ppm and 1.4 ppm were compared besides the main metabolites using the Mann-Whitney U test. Results: Gliosarcomas showed higher lipid and macromolecule resonances and a higher lipid-choline r...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Dual-Energy CT Characteristics of Parathyroid Adenomas on 25-and 55-Second 4D-CT Acquisitions: Preliminary Experience
The objective of this study was to compare the dual-energy computed tomography (CT) characteristics of parathyroid adenomas (PAs), thyroid tissue, and lymph nodes (LNs) and assess whether the spectral information can improve distinction of these tissues. Methods: Dual-energy CT scans from 20 patients with pathologically proven PAs were retrospectively evaluated, identifying 19 eligible PAs and region of interest analysis used for spectral characterization. Results: There was a significant difference in multiple spectral parameters between PAs, LNs, and the thyroid gland (P (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research

Use of Susceptibility-Weighted Imaging (SWI) in the Detection of Brain Hemorrhagic Metastases from Breast Cancer and Melanoma
Purpose: Susceptibility-weighted imaging (SWI) has significantly increased our sensitivity in detecting hemorrhagic brain lesions. We sought to explore the prevalence of intratumoral hemorrhage as detected by SWI in brain metastases from melanoma and breast cancer. Methods: Lesions with a size of 0.1 cm3 were categorized as micrometastases, whereas larger lesions were categorized as macrometastases. Susceptibility-weighted imaging findings on locations corresponding to enhancing lesions were categorized as either positive or negative based on presence/absence of signal dropout. The percentage of SWI positivity was then es...
Source: Journal of Computer Assisted Tomography - September 1, 2016 Category: Radiology Tags: Neuroradiology Source Type: research