Preoperative Computed Tomography Assessment for Perinephric Fat Invasion: Comparison With Pathological Staging
Conclusions: Computed tomography does not seem to reliably predict PNF invasion. However, PN soft-tissue stranding was shown to be the only significant factor for predicting PNF invasion, which showed good accuracy with high sensitivity and high specificity in tumors 4 cm or less. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Correlation Between Bile Reflux Gastritis and Biliary Excreted Contrast Media in the Stomach
Conclusion: Biliary excreted contrast media in the stomach on 60-minute delayed gadoxetic MRC has a correlation with the presence of bile reflux gastritis on endoscopic examination. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Two-Dimensional Spoiled Gradient-Recalled Echo Magnetic Resonance Imaging of the Liver Using Respiratory Navigator-Gating Techniques
Conclusions: Navigator-gating techniques improved 2D SPGR images of the liver acquired during free-breathing, suggesting feasibility and beneficial effects, although navigator-based images were still inferior to breath-hold images. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Evaluation and Minimization of the Pseudohepatic Anisotropy Artifact in Liver Intravoxel Incoherent Motion
Conclusion: The pseudohepatic anisotropy artifact can be minimized when using multiple diffusion-encoding gradient directions and forced free-breathing during IVIM acquisition. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Computed Tomography Pulmonary Angiogram Dynamic Parameter Correlation With Pulmonary Pressure and Pulmonary Hypertension Etiologies
Objective: Pulmonary hypertension (PH) is caused by etiologies that differ in pathophysiology. Patients with undiagnosed PH may have a computed tomography pulmonary angiography (CTPA) scan during workup. Static measurements on computed tomography correlate with PH; however, dynamic parameters have received less attention. We studied the correlation between CTPA dynamic parameters and PH and assessed whether these parameters differ among PH etiologies. We also propose a method for PH screening. Methods: Patients who underwent right-heart catheterization and CTPA within 45 days of each other were included. Charts were revie...
Source: Journal of Computer Assisted Tomography - September 1, 2017 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Gastric Heterotopic Pancreas: Computed Tomography With Clinicopathologic Correlation
Abstract: Asymptomatic heterotopic pancreas (HP) is benign and can be monitored long term without further intervention. Heterotopic pancreas is sometimes surgically resected because it can be difficult to distinguish HP from neoplastic submucosal masses such as gastrointestinal stromal tumors. Although it is not very common, HP should be considered in the differential diagnosis when diagnosing extramucosal gastric masses to avoid unnecessary intervention. We review gastric HP with pathologic correlation to help with diagnosing HP on computed tomography. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Computed Tomography in Cystic Fibrosis: Combining Low-Dose Techniques and Iterative Reconstruction
Conclusions: Iterative reconstruction helps extensively reduce radiation dose by improving image quality. It permits the use of low-kilovolt protocols without significantly degrading image reading ability in the monitoring of the predominantly young patients with CF. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Thoracic and Cardiac Imaging Source Type: research

Improved Discrimination of Myocardial Perfusion Defects at Low Energy Levels Using Virtual Monochromatic Imaging
Objectives: The aim of this study was to explore the diagnostic performance of dual-energy computed tomography perfusion (DE-CTP) at different energy levels. Methods: Patients with known or suspected coronary artery disease underwent stress and rest DE-CTP and single-photon emission computed tomography. Images were evaluated using monochromatic data, and perfusion defects were initially identified in a qualitative manner and subsequently confirmed using attenuation levels. Results: Thirty-six patients were included. Sensitivity, specificity, positive predictive value, and negative predictive value of DE-CTP for the ident...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Thoracic and Cardiac Imaging Source Type: research

Structural and Functional Correlates of Myocardial T1 Mapping in 321 Patients With Hypertrophic Cardiomyopathy
Objective: The aim of this study was to evaluate the structural and functional correlates of T1 mapping in 321 patients with hypertrophic cardiomyopathy (HCM). Methods: Three hundred twenty-one patients with HCM who underwent cardiac magnetic resonance from 2003 to 2013 were retrospectively identified from our institution's HCM registry. Left ventricular volume, function, late gadolinium enhancement (LGE), and Look-Locker T1 time were quantified. T1 time was normalized to blood pool to calculate T1 ratio. Correlations between LGE%, T1 ratio, and structural and functional features were performed using Pearson correlation c...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Thoracic and Cardiac Imaging Source Type: research

Fatal Congenital Retroperitoneal Neuroblastoma Diagnosed by Fetal Magnetic Resonance Imaging
We present a unique case of extra-adrenal retroperitoneal neuroblastoma diagnosed by fetal magnetic resonance imaging, which ultimately leads to fetal hydrops and neonatal death. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Comparison of Model-Based Iterative Reconstruction, Adaptive Statistical Iterative Reconstruction, and Filtered Back Projection for Detecting Hepatic Metastases on Submillisievert Low-Dose Computed Tomography
Conclusions: The MBIR and ASIR showed a limited sensitivity for detecting hepatic metastases in submillisievert LDCT. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Comparison of the Timing of Hepatic Arterial Phase and Image Quality Using Test-Bolus and Bolus-Tracking Techniques in Gadolinium–Ethoxybenzyl–Diethylenetriamine Pentaacetic Acid–Enhanced Hepatic Dynamic Magnetic Resonance Imaging
Objectives: The aim of this study was to compare the image quality, the degree of artifacts and the percentage of timing of the optimal hepatic arterial phase (HAP) between test-bolus and bolus-tracking methods on gadolinium–ethoxybenzyl–diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)–enhanced magnetic resonance imaging (MRI). Methods: In this prospective study, 60 patients who underwent 3-dimensional dynamic Gd-EOB-DTPA–enhanced hepatic 3-T MRI were enrolled in this study. We randomly assigned the 30 patients to the bolus-tracking method, and another 30 patients to the test-bolus method. Signal-...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Torsed and Nontorsed Inguinal Undescended Testis: Comparison of Computed Tomography Findings
Conclusions: Because torsed undescended testis can mimic a groin abscess and because torsion is a medical emergency, radiologists should be aware of this entity and its distinguishing imaging features. Color Doppler examination can ascertain absence/reduction of blood flow. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Computed Tomography in the Management of Adrenal Tumors: Does Size Still Matter?
Objective: We sought to evaluate computed tomography (CT) imaging as a predictor of adrenal tumor pathology. Methods: A retrospective review was conducted of patients who underwent unilateral adrenalectomy for an adrenal mass between January 2005 and July 2015. Tumors were classified as benign, indeterminate, or malignant based on preoperative CT findings. Results: Of 697 patients who underwent unilateral adrenalectomy, 216 met the inclusion criteria. Pathology was benign in 88.4%, indeterminate in 2.3%, and malignant in 9.3%, with a median tumor diameter of 2.7 cm (interquartile range, 1.7–4.1 cm) and 9.5 cm (inte...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

The Performance of Noncontrast Magnetic Resonance Angiography in Detecting Renal Artery Stenosis as Compared With Contrast Enhanced Magnetic Resonance Angiography Using Conventional Angiography as a Reference
Conclusion: Although NC MRA and CE MRA demonstrated comparable ability in diagnosing RAS, NC MRA achieved better technical success rates, feasibility, and image quality in motion artifacts than CE MRA did. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Digital Subtraction of Magnetic Resonance Images Improves Detection and Characterization of Pancreatic Neuroendocrine Neoplasms
Objective: The aim of this study was to evaluate the usefulness of digital image subtraction of contrast-enhanced magnetic resonance (MR) images for detection and characterization of pancreatic neuroendocrine neoplasms (PanNENs). Methods: Magnetic resonance examinations of 50 histologically verified PanNENs were retrospectively evaluated by 2 radiologists; 50 ductal adenocarcinomas were included as a control group. Late arterial phase images and correspondent subtracted images were analyzed. Tumor detectability on a subjective 3-point scale and contrast-to-noise ratios were compared across sequences using paired Student t...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Radiofrequency Ablation of Hepatic Tumor: Subjective Assessment of the Perilesional Vascular Network on Contrast-Enhanced Computed Tomography Before and After Ablation Can Reliably Predict the Risk of Local Recurrence
Conclusions: Subjective estimation of the width of ablative margin can reliably predict the risk of local recurrence. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Diffusion-Weighted Imaging for Differentiating Uterine Leiomyosarcoma From Degenerated Leiomyoma
Purpose: The study aimed to investigate magnetic resonance diffusion-weighted imaging (DWI) in the differentiation of uterine leiomyosarcoma (ULMS) from degenerated leiomyoma (DLM). Methods: Sixteen patients with ULMSs and 26 patients with DLMs confirmed by surgery and pathology underwent conventional magnetic resonance imaging and DWI. The mean apparent diffusion coefficient (ADC) values of the 2 groups’ tumors were measured and compared using an independent-sample t test (b = 0.1000 s/mm2 [ADC1]; b = 0.800 s/mm2 [ADC2], respectively). A receiver operating characteristic curve was used to evaluate the diagnostic pe...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Intravoxel Incoherent Motion Diffusion-Weighted Magnetic Resonance Imaging of Cervical Cancer With Different b-Values
Objective: The aims of this study were to evaluate the dependence of diffusion parameters on the b values adopted for intravoxel incoherent motion diffusion-weighted magnetic resonance imaging and to investigate the application value of multiple diffusion parameters obtained from monoexponential and biexponential models in subjects with a normal cervix and in cervical cancer patients. Methods: A total of 120 female patients with cervical cancer and 21 female control subjects with a normal cervix underwent diffusion-weighted magnetic resonance imaging with 13 b values (0–2000 s/mm2) at 3 T. The standard apparent diff...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Susceptibility Weighted With Quantitative Phase Magnetic Resonance Imaging in Differentiation of Various Stages of Hemorrhage and Calcification in Female Pelvic Pathologies: A Preliminary Study
Background: The purposes of this study were to assess the value of phase for characterization of female pelvic lesions with hemorrhage in various stages and to differentiate them from calcified lesions at 3.0-T magnetic resonance imaging (MRI). Methods: Forty-four female patients with hemorrhagic (n = 37) or calcified (n = 7) pelvic pathology underwent conventional MRI including susceptibility-weighted imaging with phase information. Hemorrhagic lesions were grouped into acute, subacute, and chronic, and calcified lesions were detected on the basis of conventional imaging findings. Phase quantification of these hemorrhagi...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Intrasession and Intersession Repeatability of Diffusion Tensor Imaging in Healthy Human Liver
Conclusion: Increased SNR may improve intrasession and intersession repeatability of liver DTI metrics. Scan repeatability was not influenced by NGD. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Efficacy and Clinical Utility of a High-Attenuation Object Artifact Reduction Algorithm in Flat-Detector Image Reconstruction Compared With Standard Image Reconstruction
Objective: To evaluate the effectiveness and clinical utility of a metal artifact reduction (MAR) image reconstruction algorithm for the reduction of high-attenuation object (HAO)–related image artifacts. Methods: Images were quantitatively evaluated for image noise (noiseSD and noiserange) and qualitatively for artifact severity, gray–white-matter delineation, and diagnostic confidence with conventional reconstruction and after applying a MAR algorithm. Results: Metal artifact reduction reduces noiseSD and noiserange (median [interquartile range]) at the level of HAO in 1-cm distance compared with convention...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Neuroradiology/Head and Neck Imaging Source Type: research

Low-Energy Virtual Monochromatic Dual-Energy Computed Tomography Images for the Evaluation of Head and Neck Squamous Cell Carcinoma: A Study of Tumor Visibility Compared With Single-Energy Computed Tomography and User Acceptance
Objective: Dual-energy computed tomography (CT) 40-keV virtual monochromatic images (VMIs) have been reported to improve visualization of head and neck squamous cell carcinoma, but a direct comparison to single-energy CT (SECT) is lacking, and there is debate regarding subjective user preference. We compared 40-keV VMIs with SECT and performed a subjective evaluation of their utility and acceptability for clinical use. Methods: A total of 60 dual-energy CT and 60 SECT scans from 2 different institutions were evaluated. Tumor conspicuity was evaluated objectively using absolute and relative attenuation and subjectively by ...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Neuroradiology/Head and Neck Imaging Source Type: research

Reassessing the Anatomic Origin of the Juvenile Nasopharyngeal Angiofibroma
Conclusions: Our results suggest that the juvenile nasopharyngeal angiofibroma origin is in the region of the choana and nasopharynx rather than the sphenopalatine foramen or pterygopalatine fossa. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Neuroradiology/Head and Neck Imaging Source Type: research

Detection of Bone Marrow Edema Pattern With Dual-Energy Computed Tomography of the Pig Mandible Treated With Radiotherapy and Surgery Compared With Magnetic Resonance Imaging
Objective: The aim of the study was to investigate the accuracy of dual-energy computed tomography (DECT) compared with magnetic resonance (MR) imaging for the detection of edema of the mandible. Materials and methods: Fifteen adult Göttingen mini pigs received irradiation to the mandible with an equivalent dose of 0, 25, 50, or 70 Gy. Six months after irradiation, all animals underwent DECT and MR imaging of the mandible. Magnetic resonance short tau inversion recovery (STIR) was used for the grading of the bone marrow edema (0–3). Dual-energy CT (80 and 140 kVp) was performed, and virtual noncalcium (VNCa) im...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Neuroradiology/Head and Neck Imaging Source Type: research

Added Value of Parotid R2* Values for Evaluation of Sjögren Syndrome: A Preliminary Study
Objective: To explore the application of parotid R2* values for evaluating Sjögren syndrome (SS). Methods: Twenty-four consecutive SS patients and 24 sex-matched and age-matched healthy volunteers underwent bilateral parotid 3.0 T magnetic resonance (MR) imaging, including blood oxygenation level dependent sequence. Parotid R2* values of SS patients and volunteers were compared. A receiver operating characteristic analysis was used to evaluate the diagnostic performance of parotid R2* value alone and in combination with MR nodular grade. Results: The left parotid R2* value was significantly lower than the right (P =...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Neuroradiology/Head and Neck Imaging Source Type: research

Magnetic Resonance Imaging of Parotid Gland Tumors: Dynamic Contrast-Enhanced Sequence Evaluation
Conclusions: Magnetic resonance imaging protocol including dynamic sequence for the characterization of parotid gland lesion yielded nonsignificant increases in sensitivity, specificity, or positive predictive values, and negative predictive values over noninjected protocol. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Neuroradiology/Head and Neck Imaging Source Type: research

Bifid Mandibular Canals Incidence and Anatomical Variations in the Population of Shanghai Area by Cone Beam Computed Tomography
Conclusions: Our study underlined the different characteristics and occurrence rates of BMCs in the population of the Shanghai area and the importance of using cone beam computed tomography for a reliable detection, providing useful information to help prevent presurgery and postsurgery complications. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Neuroradiology/Head and Neck Imaging Source Type: research

Median Lingual Lymph Nodes: Prevalence on Imaging and Potential Implications for Oral Cavity Cancer Staging
Conclusions: Median lingual lymph nodes are infrequently identified with MRI in controls, concordant with the low prevalence of metastases from OCSCC to this inconstant nodal group. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Neuroradiology/Head and Neck Imaging Source Type: research

Computed Tomography in the Diagnosis of Classical Trigeminal Neuralgia
Conclusions: These findings indicate a clear difference between neurovascular contact and conflict and point to the use of high-resolution computed tomography visualization of the position of SCA loop apex relative to the trigeminal nerve root as a primary diagnostic method. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Neuroradiology/Head and Neck Imaging Source Type: research

Automated Infarct Core Volumetry Within the Hypoperfused Tissue: Technical Implementation and Evaluation
Conclusions: The proposed “Tmax inside” method is superior to the commonly used global thresholding approach. Furthermore, the method allows evaluating changes in cerebral blood volume and blood flow by taking the counterpart in the healthy hemisphere as a patient-individual reference. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Neuroradiology/Head and Neck Imaging Source Type: research

Hematocrit and Serum Hemoglobin Do Not Influence Values in Computed Tomography Perfusion of Patients With Acute Ischemic Stroke
Objective: There is a correlation between both serum hemoglobin (HGB) and hematocrit (HCT) and attenuation values of vessels in noncontrast-enhanced computed tomography (NECT), which could influence calculated perfusion maps in CT perfusion. Methods: We retrospectively included 45 patients, who presented with acute new neurological symptoms and underwent NECT and CT perfusion (128-row multi detector scanner, coverage: 6.9 cm craniocaudally; 80 kV; 200 mAs; temporal resolution: 2 seconds using 40 mL Ultravist 370 at a flow rate of 5 mL/s) on admission and a follow-up MRI within 1 week of admission. Results: Hematocrit, HG...
Source: Journal of Computer Assisted Tomography - July 1, 2017 Category: Radiology Tags: Neuroradiology/Head and Neck Imaging Source Type: research

The Effect of Patient Diameter on the Dual-Energy Ratio of Selected Contrast-Producing Elements
Conclusions: The dual-energy ratio for different contrast materials is largely unaffected by changes in phantom diameter. This should allow for robust separation of most contrast material combinations irrespective of patient size. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Miscellaneous Topics Source Type: research

Diagnostic Computed Tomography Coregistration With In-111-DTPA-Octreotide Single Photon Emission Tomography/Low-Dose Computed Tomography
Conclusions: Coregistration is becoming increasingly easier and may be utilized when SPECT/LDCT is inconclusive. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Miscellaneous Topics Source Type: research

“Fat Brook” in the Popliteal Fossa: Cadaveric and Clinical Investigation With Magnetic Resonance Imaging
Conclusions: The FB might be a part of the superficial layer of superficial fascia and not be mistaken for a fat fracture or Morel-Lavallée lesion. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Miscellaneous Topics Source Type: research

The “Air in the CT X-ray Tube Oil” Artifact—Examples of the Quality Control Images and the Evaluation of Four Potential Clinical Patients' Head Computed Tomography Cases
We present a newly reposted scanner-based artifact—with 4 potential patients' head computed tomography (CT) cases—the “Air in the CT X-ray Tube Oil” artifact with a 64-slice multidetector CT. This artifact mimics diseases, which cause hypodense findings in CT images. It can be difficult to notice in the clinical patient imaging but can be also very difficult to verify in quality control tests. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Neuroradiology Source Type: research

Root Cause Analysis: An Examination of Odontogenic Origins of Acute Maxillary Sinusitis in Both Immunocompetent & Immunocompromised Patients
Conclusions: Potential odontogenic sources of acute maxillary sinusitis are highly prevalent in both immunocompetent and immunocompromised patients, although the 2 patient populations demonstrate no difference in the prevalence of these potential odontogenic sources. Periapical lucencies were found to be associated with an ipsilateral sinus fluid level. Increased awareness of the importance of dental and periodontal diseases as key components of maxillofacial computed tomography interpretation would facilitate a more appropriate and timely treatment. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Neuroradiology Source Type: research

Discrimination Between Patients With Alzheimer Disease and Healthy Subjects Using Layer Analysis of Cerebral Blood Flow and Xenon Solubility Coefficient in Xenon-Enhanced Computed Tomography
Conclusions: With the use of the discriminant views obtained by xenon-enhanced CT, we could effectively discriminate between patients with AD and healthy subjects using both CBF and λ. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Neuroradiology Source Type: research

Early Changes of Irradiated Parotid Glands Evaluated by T1rho-Weighted Imaging: A Pilot Study
Objective: The aim of the study was to confirm the feasibility of T1rho-weighted imaging to evaluate the dynamic changes of parotid glands in patients with nasopharyngeal carcinoma (NPC) undergoing intensity-modulated radiation therapy. Methods: Twenty-six NPC patients (19 men; 7 women; mean [SD] age, 48.9 [13.4] years) underwent the following 3 serial T1rho-weighted imaging: within 2 weeks before radiotherapy (RT, pre-RT), 5 weeks after the beginning of RT (mid-RT), and 4 weeks after RT (post-RT). Parotid volumes, T1rho values, mean radiation doses, and xerostomia degrees were recorded. Change rates of parotid T1rho valu...
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Neuroradiology Source Type: research

Morphometric Study of the Vestibular Aqueduct in Patients With Enlarged Vestibular Aqueduct
Objective: To test whether there are significant differences in the morphologic features of the enlarged vestibular aqueduct (EVA) and its anatomic relationships with adjacent structures between EVA patients with and without other inner ear malformations. Methods: The morphology of vestibular aqueduct, volume of vestibule, and anatomic location of facial nerve (FN) were compared among 3 groups. Group A, 18 control subjects; group B, 32 EVA patients without other inner ear malformations; group C, 14 EVA patients with other inner ear malformations. Results: The isthmus of the aqueduct and vestibular volume in group C were ...
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Neuroradiology Source Type: research

Changes in Hemodynamic Response Patterns in Motor Cortices Measured by Task-Based Functional Magnetic Resonance Imaging in Patients With Moyamoya Disease
Conclusions: Blood oxygen level–dependent fMRI is an effective technique to assess hemodynamic changes in patients with MMD. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Neuroradiology Source Type: research

Support Vector Machines Model of Computed Tomography for Assessing Lymph Node Metastasis in Esophageal Cancer with Neoadjuvant Chemotherapy
Conclusions: The support vector machine model of CT images can help diagnose lymph node metastasis in esophageal cancer with preoperative chemotherapy. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Thoracic Imaging Source Type: research

Metal Artifact Reduction on Chest Computed Tomography Examinations: Comparison of the Iterative Metallic Artefact Reduction Algorithm and the Monoenergetic Approach
Conclusions: Iterative metallic artefact reduction reduces metal artifacts more efficiently than monoenergetic imaging. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Thoracic Imaging Source Type: research

Scout-Based Automated Tube Potential Selection Technique (kV Assist) in Enhanced Chest Computed Tomography: Effects on Radiation Exposure and Image Quality
Objective: The aim of our study was to assess radiation dose reduction and image quality for enhanced chest CT examinations with a scout-based automated tube potential selection technique (kV Assist) compared with a standard 120-kV protocol. Methods: Prospective study of enhanced chest CT examinations was performed in 100 consecutive patients with kV Assist and in 100 consecutive patients with conventional 120-kV protocol on a multislice CT (Discovery CT750 HD). The body mass index, CT dose index volume, and dose length product were recorded from the examination protocol. Image noise and CT value was measured on region of...
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Thoracic Imaging Source Type: research

Computed Tomographic Appearance of Organizing Pneumonia in an Oncologic Patient Population
Conclusions: Organizing pneumonia more commonly presents as discrete lesions with a peripheral location in patients with lung cancer and as a diffuse process in patients who had undergone HSCT. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Thoracic Imaging Source Type: research

Prognostic Value of Computed Tomography–Detected Extramural Venous Invasion to Predict Disease-Free Survival in Patients With Gastric Cancer
Conclusions: The ctEMVI was an independent prognostic factor for worse DFS in patients with gastric cancer. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Predicting and Early Monitoring Treatment Efficiency of Cervical Cancer Under Concurrent Chemoradiotherapy by Intravoxel Incoherent Motion Magnetic Resonance Imaging
Conclusions: Intravoxel incoherent motion MR imaging held great potential in both predicting and early monitoring treatment efficiency of advanced cervical cancer under CCRT. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Spectral Computed Tomography Imaging of Gastric Schwannoma and Gastric Stromal Tumor
Gastric schwannomas (GSs) and gastrointestinal stromal tumors (GSTs) are grossly similar submucosal neoplasms with different prognoses. We explored the value of spectral computed tomography (CT) to distinguish between them. Methods: Patients diagnosed with GS or GST at Lanzhou University Second Hospital, China, between May 2013 and June 2015 were included retrospectively. The subjects underwent spectral CT examination before surgery and had histologically confirmed diagnosis of GS or GST. Results: Twelve patients with GS (3 men; 9 women; mean [SD] age, 47.0 [11.5] years) and 20 with GST (7 men; 13 women; mean [SD] age, 5...
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Effect of a Low-Rank Denoising Algorithm on Quantitative Magnetic Resonance Imaging-Based Measures of Liver Fat and Iron
This study aimed to assess the effect of a low-rank denoising algorithm on quantitative magnetic resonance imaging-based measures of liver fat and iron. Materials and Methods: This was an institutional review board–approved, Health Insurance Portability and Accountability Act–compliant, retrospective analysis of 42 consecutive subjects who were imaged at 3T using a multiecho gradient echo sequence that was reconstructed using the multistep adaptive fitting algorithm to obtain quantitative proton density fat fraction (PDFF) and R2* maps (original maps). A patch-wise low-rank denoising algorithm was then applied...
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research

Small Bowel Gastrointestinal Stromal Tumors: Multidetector Computed Tomography Enhancement Pattern and Risk of Progression
Conclusions: This case series reveals an important significant association between heterogeneous enhancement and non-low risk (ie, moderate/high) SB-GISTs. Beyond just describing the tumor, using enhancing pattern, the interpreting radiologist can preoperatively suggest additional prognostic information, potentially helpful for surgical planning. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2017 Category: Radiology Tags: Abdominal Imaging Source Type: research