Ovarian Cancer Genetics and Implications for Imaging and Therapy
Ovarian cancer is the second most common gynecologic malignancy in the United States. Ovarian cancer has a dismal prognosis when diagnosed at an advanced stage. Therapy for these cancers is determined not only by stage but also by their heterogeneous pathologic features, genetic mutations, and biology. In this review, we will discuss types of epithelial ovarian cancer, and their associated genetic mutations and the implications for imaging and treatment. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

The Role of Positron Emission Tomography/Magnetic Resonance Imaging in Gynecological Malignancies
This article will review the various applications of PET/MRI in gynecological cancer. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - November 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Whole-Lesion Computed Tomography–Based Entropy Parameters for the Differentiation of Minimally Invasive and Invasive Adenocarcinomas Appearing as Pulmonary Subsolid Nodules
This study was approved by the institutional review board in our hospital. From July 2015 to November 2018, 186 consecutive patients with solitary peripheral pulmonary SSNs that were pathologically confirmed as pulmonary adenocarcinomas (74 MIA and 112 IAC lesions) were included and subdivided into the training data set and the validation data set. Chest CT scans without contrast enhancement were performed in all patients preoperatively. The subjective CT features of the SSNs were reviewed and compared between the MIA and IAC groups. Each SSN was semisegmented with our in-house software, and entropy-related parameters were...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Impact of Knowledge-Based Iterative Model Reconstruction on Image Quality and Hemodynamic Parameters in Dynamic Myocardial Computed Tomography Perfusion Using Low-Tube-Voltage Scan: A Feasibility Study
Objective Knowledge-based iterative model reconstruction (IMR) yields diagnostically acceptable image quality in low-dose static computed tomography (CT). We aimed to evaluate the feasibility of IMR in dynamic myocardial computed tomography perfusion (CTP). Methods We enrolled 24 patients who underwent stress dynamic CTP using a 256-slice CT. Images were reconstructed using filtered back projection (FBP), hybrid IR, and IMR. Image quality and hemodynamic parameters were compared among three algorithms. Results Qualitative image quality and contrast-to-noise ratio were significantly higher by IMR than by FBP or hybr...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Prototype Ultrahigh-Resolution Computed Tomography for Chest Imaging: Initial Human Experience
The objective of this study was to evaluate a prototype, ultrahigh-resolution computed tomography offering higher reconstruction matrix (1024 × 1024) and spatial resolution (0.15 mm) for chest imaging. Methods Higher (1024) matrix reconstruction enabled by ultrahigh-resolution computed tomography scanner (128-detector rows; detector width, 0.25 mm; spatial resolution, 0.15 mm) was compared with conventional (512) reconstruction with image quality grading on a Likert scale (1, excellent; 5, nondiagnostic) for image noise, artifacts, contrast, small detail, lesion conspicuity, image sharpness, and diagnostic confide...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Manual and Fully Automated Segmentation to Determine the Ferromagnetic Status of Bullets Using Computed Tomography Dual-Energy Index: A Phantom Study
Conclusions Our study demonstrates that DECT can assess the ferromagnetic status of bullets and their magnetic resonance imaging compatibility using an extended computed tomography scale in an ex vivo phantom model. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Technical Developments Source Type: research

Intraosseous Hibernoma: Five Cases and a Review of the Literature
We present 5 cases of intraosseous hibernoma, a rare benign tumor of brown fat. Our literature review reveals that the average age at presentation is 58.6 years, and 69.7% of patients are female. Lesions are most often located in the spine and pelvis. Computed tomography usually demonstrates sclerotic changes, although lesions can be lytic. Magnetic resonance imaging findings include heterogeneous T2 hyperintensity. Technetium 99m-methyl diphosphonate bone scan reveals variable radiotracer uptake, whereas 18F-labeled fluoro-2-deoxyglucose (FDG) PET-CT shows mild uptake. Intraosseous hibernoma should be considered when imag...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Imaging Findings of Klippel-Trenaunay Syndrome
We aim to review the imaging findings of Klippel-Trenaunay syndrome. This disorder characterized clinically by a triad of capillary malformations manifesting as a port-wine stain, venous varicosities typically along the lateral aspect of the lower extremities, and bone and/or soft tissue hypertrophy. Imaging of extremities shows unilateral venous varicosities, persistent embryonic veins, anomalous of the superficial and deep venous system, low-flow venolymphatic malformations, and bony and soft tissue hypertrophy. Other findings include neurospinal as cavernoma, aneurysm, and hemimegalencephaly, pulmonary as pulmonary thro...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Musculoskeletal Imaging Source Type: research

Correlation Between Apparent Diffusion Coefficient Values of the Renal Parenchyma and Estimated Glomerular Filtration Rates on 3-T Diffusion-Weighted Echo-Planar Magnetic Resonance Imaging
Objective To evaluate the relationship between the apparent diffusion coefficient (ADC) values of renal parenchyma and estimated glomerular filtration rates (eGFR). Methods Data on 216 patients examined by 3-T magnetic resonance imaging for various reasons were retrospectively collected. Results There was a significant linear correlation between the ADC values and eGFRs (r = 0.254, P (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Combining Clinical Characteristics and Specific Magnetic Resonance Imaging Features to Predict Placenta Accreta
Conclusions The study suggested that 2 or more instances of previous cesarean deliveries and/or abortion, placenta previa, and placenta-myometrial interface interruption were independent risk factors for placenta accreta. A combination of a single clinical risk factor and an MRI risk factor can improve the diagnosis of placenta accreta, and a combination of all 3 risk factors could help recognize patients with placenta accreta. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Comparing Arterial- and Venous-Phase Acquisition for Optimization of Virtual Noncontrast Images From Dual-Energy Computed Tomography Angiography
Conclusions Virtual noncontrast images based on venous-phase scans appear to be a more accurate representation of TNC scans than VNC images based on arterial-phase scans. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Differentiation of Hepatic Sclerosed Hemangiomas From Cavernous Hemangiomas Based on Gadoxetic Acid–Enhanced Magnetic Resonance Imaging Features
The objective of this study was to evaluate the imaging features of a hepatic sclerosed hemangioma by comparing them with those of a cavernous hemangioma using magnetic resonance imaging with gadoxetic acid enhancement. Methods Nine patients with hepatic sclerosed hemangiomas and 36 patients with cavernous hemangiomas (control group) who underwent gadoxetic acid–enhanced magnetic resonance imaging were included. Qualitative values (imaging findings and enhancement pattern [typical vs atypical enhancement]) and quantitative values (apparent diffusion coefficient) were evaluated. Results Patients with sclerosed h...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Evaluation of Intravoxel Incoherent Motion Diffusion-Weighted Magnetic Resonance Imaging for Detection of Bowel Inflammation in Patients With Crohn Disease
This study aimed to evaluate the feasibility of intravoxel incoherent motion diffusion-weighted magnetic resonance imaging (DW-MRI) in detecting bowel inflammation in patients with Crohn disease (CD). Methods Sixteen patients who underwent intravoxel incoherent motion DW-MRI for CD and colonoscopy were recruited. Seventy-nine bowel segments were selected, and their mean D, D*, f, and apparent diffusion coefficient (ADC) values were measured. The receiver operating characteristic curve was performed to distinguish inflamed from normal bowel. Results The mean D, D*, f, and ADC values of inflamed bowel were significantl...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Evaluation of Gall Bladder Stones Using Susceptibility Weighted Imaging
Conclusions Gallbladder stones can be visualized with SWI and may be added to the routine magnetic resonance imaging protocol for its evaluation. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Differentiation of Gastric Schwannoma From Gastric Gastrointestinal Stromal Tumor With Dual-Phase Contrast-Enhanced Computed Tomography
Objective To identify the computed tomographic features to differentiate gastric schwannoma from gastric gastrointestinal stromal tumor. Methods Computed tomographic images of 103 pathologically confirmed patients with gastric schwannoma (n = 23) or gastric gastrointestinal stromal tumor (n = 80) were retrospectively studied. Sex, morphology, location, border, growth pattern, enhancement pattern, necrosis, calcification, ulceration, and perigastric lymph nodes were analyzed. Age, short diameter, long diameter, and the degree of enhancement were measured. Statistical analyses were performed, and receiver operating char...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Contrast Material Injection Protocol With the Dose Determined According to Lean Body Weight at Hepatic Dynamic Computed Tomography: Comparison Among Patients With Different Body Mass Indices
The objective of this study was to compare enhancement of the aorta and liver on hepatic dynamic computed tomography scans acquired with contrast material doses based on the lean body weight (LBW) or the total body weight (TBW). Methods We randomly divided 529 patients (279 men, 250 women; median age, 66 years) scheduled for hepatic dynamic computed tomography into 2 groups. The LBW patients (n = 278) were injected with 679 mg iodine/kg (men) or 762 mg iodine/kg (women). The TBW group (n = 251) was injected with 600 mg iodine/kg TBW. Each group was subdivided into the 3 classes based on the body mass index (BMI; low, no...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Preoperative Computed Tomography Features of Intrahepatic Cholangiocarcinoma for Predicting Lymph Node Metastasis and Overall Survival
Objectives The aims of this study were to compare the difference of computed tomography (CT) features between intrahepatic cholangiocarcinomas (ICCs) with and without lymph node metastasis (LNM) and to construct a nomogram to predict LNM and overall survival preoperatively. Methods Clinicopathological and contrast-enhanced CT features of 63 patients with ICC were analyzed. Multivariate logistic regression analysis was performed to construct a nomogram to predict LNM preoperatively. Survival curves were drawn with the Kaplan-Meier method, and survival difference was compared. Results Intrahepatic cholangiocarcinomas...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Spectral Computed Tomographic Parameters Predict the Therapeutic Efficacy and Overall Survival of the Angiogenesis Inhibitor AL3818 in Hepatic Lesions: Preliminary Animal Study
Conclusions The current study shows the capability of the changes (Δ) in repeated spectral CT parameters to predict the tumor response during antiangiogenesis therapy in small hepatic tumors. ΔnICAP and ΔnICVP were predictors for treatment response and were associated with OS. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Cinematic Rendering With Positive Oral Contrast: Virtual Fluoroscopy
Recently, a novel 3-dimensional visualization methodology for volumetric computed tomography data has become available. This method, known as cinematic rendering, uses an advanced lighting model to create photorealistic images from standard computed tomography acquisition data composed of isotropic voxels. We have observed that cinematic rendering visualizations in which patients have been administered dense, positive oral contrast do not have any substantive visual artifacts and can be used to demonstrate bowel pathology to advantage (ie, “virtual fluoroscopy”). In this technical note, we describe our acquisit...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Metal Artifact Reduction in Routine Chest and Abdominal Examinations Using Virtual Monoenergetic Images From Spectral Detector Computed Tomography
The objective of this study was to investigate the quantitative and qualitative effects of virtual monoenergetic images (VMIs) by spectral detector computed tomography (SDCT) on metal artifacts in routine examinations. Methods Fifty-nine patients with metal artifacts (caused by pacemakers, ports, screws, or prosthetic joints) affecting muscular tissue in the chest and/or abdomen were scanned using SDCT. Attenuation values around the metallic device were compared with contralateral unaffected values, for conventional images and 80 to 200 keV VMIs. In addition, general image quality and artifact intensity were rated by 2 ...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Novel Characteristic Skull Magnetic Resonance Imaging Features Associated With Meningioma
Conclusions Intramedullary prominent vessel, intramedullary enhancement, and intramedullary T2-hyperintensity may be novel characteristic skull findings associated with meningioma. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Application of Postlabeling Delay Time in 3-Dimensional Pseudocontinuous Arterial Spin-Labeled Perfusion Imaging in Normal Children
Conclusions The optimal PLD values for 3D-pcASL perfusion imaging are different in children of different ages. The optimal PLD value for infants who are 6 months younger is 1025 milliseconds. The optimal PLD value for children older than 6 months to 18 years is 1525 milliseconds. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Validation of the NeuroImaging Radiological Interpretation System for Acute Traumatic Brain Injury
Conclusions The present study further demonstrates the predictive value of NIRIS in guiding standardized clinical management and decision-making regarding treatment options for TBI patients. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Sensitivity of the Mount Fuji Sign After Evacuation of Chronic Subdural Hematoma in Nonagenarians
Conclusion Mount Fuji sign in nonagenarians after cSDH evacuation is not a specific sign of TP. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Carotid Artery Imaging Is More Strongly Associated With the 10-Year Atherosclerotic Cardiovascular Disease Score Than Coronary Artery Imaging
Conclusions Both carotid and coronary artery imaging features can predict ASCVD score. The carotid artery was more associated to the ASCVD score than the coronary artery. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Odontogenic Tumors: Imaging-Based Review of the Fourth Edition of World Health Organization Classification
The fourth edition of World Health Organization (2017) classified odontogenic tumors according to the tissue of origin. Epithelial odontogenic tumors include ameloblastomas, calcifying epithelial odontogenic tumors, adenomatoid odontogenic tumors, and squamous odontogenic tumors. Mixed epithelial and mesenchymal odontogenic tumors include odontomas, ameloblastic fibromas, dentigenic ghost cell odontogenic tumors, and primordial odontogenic tumors. Mesenchymal odontogenic tumors include cementoblastomas, cement-ossifying fibromas, odontogenic fibromas, and odontogenic myxomas. Malignant odontogenic tumors are either carcino...
Source: Journal of Computer Assisted Tomography - September 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Detectability of Malignant Lesions by Whole-Body Magnetic Resonance Imaging Using Whole-Body Integrated Positron Emission Tomography/Magnetic Resonance Imaging
Conclusion The sensitivity of whole-body MRI was lower when lesion based, but almost equivalent when patient based compared with PET/MRI. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Whole Body Imaging Source Type: research

Myeloproliferative Neoplasms: A Primer for Radiologists
The myeloproliferative neoplasms (MPNs) are a heterogeneous group of diseases including polycythemia vera, essential thrombocythemia, and primary myelofibrosis. Knowledge of the radiological and clinical features of MPNs and their associated complications is critical for interpreting radiologists. The purpose of this article is to provide a primer to radiologists summarizing the modern understanding of MPNs from an imaging-based perspective, including common disease-related findings and complications related to hematopoietic cell transplant. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Whole Body Imaging Source Type: research

Combining Prostate Imaging Reporting and Data System, Histogram Analysis, and Prostate-Specific Antigen Density to Determine the Risk of Prostate Cancer in Patients With Prostate-Specific Antigen of 4 to 20 ng/mL
Objective To develop regression models using Prostate Imaging Reporting and Data System (PI-RADS), histogram analysis, and prostate-specific antigen density (PSAD) to predict prostate cancer (PCa) and clinically significant PCa (CSPCa) in patients with prostate-specific antigen of 4 to 20 ng/mL. Methods In total, 195 PCa and 386 noncancer patients with prostate-specific antigen of 4 to 20 ng/mL were divided into development and validation cohorts. Magnetic resonance imaging results of them were assessed by PI-RADS scores and histogram analysis–corrected PI-RADS (PI-RADSh) scores. Diagnostic efficiencies for PCa ...
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Diffuse Peripheral Zone T2 Hypointensity: When to Worry About Prostate Cancer
Conclusion Obscured surgical capsule is a strong independent predictor for diffuse PCa in T2 hypointense PZs. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Application of Blood Oxygenation Level–Dependent Magnetic Resonance Imaging and Intravoxel Incoherent Motion to Assess Bilateral Renal Pathophysiological Processes Induced by Iodixanol Renal Artery First-Pass in Rabbit Model
Background Noninvasive blood oxygen level–dependent imaging and intravoxel incoherent motion sequences were used to assess bilateral renal oxygenation, hemodynamics, and proton diffusion in iodixanol renal artery first-pass in rabbit model. Methods Forty-two rabbits were divided into 2 groups. Saline and iodixanol (1 g iodine/kg, left renal artery) were administered. Magnetic resonance imaging scans were acquired longitudinally at 24 hours prior to and 1, 24, 48, and 72 hours after administration to assess apparent diffusion coefficient, pure molecular diffusion (D), perfusion-related diffusion (D*), volume frac...
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Nonenhancing Component of Clear Cell Renal Cell Carcinoma on Computed Tomography Correlates With Tumor Necrosis and Stage and Serves as a Size-Independent Prognostic Biomarker
This study aimed to quantify nonenhancing tumor (NT) component in clear cell renal cell carcinoma (ccRCC) and assess its association with histologically defined tumor necrosis, stage, and survival outcomes. Methods Among 183 patients with ccRCC, multi-institutional changes in computed tomography attenuation of tumor voxels were used to quantify percent of NT. Associations of NT with histologic tumor necrosis and tumor stage/grade were tested using Wilcoxon signed rank test and with survival outcomes using Kaplan-Meier curves/Cox regression analysis. Results Nonenhancing tumor was higher in ccRCC with tumor necrosis (...
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

DIfferential Subsampling With Cartesian Ordering With Respiratory Triggering Versus Conventional Liver Acquisition With Volume Acquisition: A Multiple Reader Preference Study
Objective The aim of this study was to compare respiratory-triggered DIfferential Subsampling with Cartesian Ordering (rtDISCO) and breath-held Liver Acquisition with Volume Acquisition (LAVA) image quality. Methods In this institutional review board–approved, Health Insurance Portability and Accountability Act–compliant prospective study, 25 subjects underwent T1 imaging with rtDISCO and LAVA before and after intravenous contrast. Three readers scored individual series and side-by-side comparisons for motion and noise. Eight clinical tasks were qualitatively assessed. Results As individual series, read...
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Diagnostic Efficacy of T2 Dark Spot, T2 Dark Rim Signs, and T2 Shading on Magnetic Resonance Imaging in Differentiating Endometriomas From Hemorrhagic Cysts
Conclusions T2 dark spot and T2 dark rim signs could be useful for distinguishing endometriomas from hemorrhagic cysts. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Individualized Delay for Abdominal Computed Tomography Angiography Bolus-Tracking Based on Sequential Monitoring: Increased Aortic Contrast Permits Decreased Injection Rate and Lower Iodine Dose
Objective The aim of this study was to determine if computed tomography (CT) angiography using an individualized transition delay (CTA-ID) would facilitate reductions in injection rate and iodine dose. Methods The CTA-ID was performed in 20 patients with routine injection rate and iodine dose; 20 patients with injection rate lowered by 1 mL/s; and 40 patients with injection rate lowered by 1 mL/s with 29% less iodine. Routine CTAs in the same or size-matched patients served as controls. Diagnostic image quality and intra-arterial CT numbers were assessed. Results The median transition delay between aortic threshold...
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Clinical and Payer-Based Analysis of Value of Dual-Energy Computed Tomography for Workup of Incidental Abdominal Findings
Conclusions Dual-energy computed tomography can provide an imaging-based diagnosis of incidental abdominal findings, otherwise incompletely characterized on routine abdominal computed tomography, in approximately 21% of patients. In select patients, the monetary savings from abolishing additional imaging may reduce payer costs associated with use of DECT. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Correlation Between Dual-Energy Computed Tomography Single Scan and Computed Tomography Perfusion for Pancreatic Cancer Patients: Initial Experience
The objective of this study was to evaluate the role and limit of iodine maps by dual-energy computed tomography (CT) single scan for pancreatic cancer. Methods Thirty patients with suspected solitary pancreatic cancer were enrolled in this study and underwent CT perfusion and iodine maps. The parameters of pancreatic cancer and normal pancreatic tissue were calculated. Pearson correlation and paired t test were used for evaluating 2 techniques. Results Iodine concentration had a moderate positive correlation with blood flow or blood volume (P (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research

Postoperative Imaging After Lobectomy: Predicting the Displacement and Change in Orientation of Nonresected Lung Nodules
Conclusions Remaining ipsilateral nodules and their associated segmental airways are displaced in a predictable fashion after lobectomy. This may help in the assessment of follow-up imaging. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Lesser Known Facts of Small Cell Lung Cancer
Until recently, the treatment of small cell lung cancer (SCLC), a malignancy classically described as having a robust response to first-line therapy with near-universal recurrence, has remained relatively unchanged. Advancements in the management of SCLC have lagged behind those seen for non–small cell lung cancers. As the era of precision medicine and targeted immunotherapy evolves, radiologists must be familiar with the modern treatment paradigms of SCLC and associated imaging patterns, including classic and nonclassic appearances of treatment complications. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Coronary Artery Anomalies and Associated Radiologic Findings
Coronary anomalies occur in about 1% of the general population and in severe cases can lead to sudden cardiac death. Coronary computed tomography angiography and magnetic resonance imaging have been deemed appropriate for the evaluation of coronary anomalies by accurately allowing the noninvasive depiction of coronary artery anomalies of origin, course, and termination. The aim of this article is to describe and illustrate a comprehensive array for the classification of coronary artery anomalies. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Cardiothoracic Imaging Source Type: research

Positive Predictive Values of Lumbar Spine Magnetic Resonance Imaging Findings for Provocative Discography
Conclusions Disc herniations and HIZ discs have high predictive value in identifying a pain generator. An extruded disc herniation has the highest PPV for discogenic pain. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Usefulness of Diffusion-Weighted Magnetic Resonance Imaging Using Apparent Diffusion Coefficient Values for Diagnosis of Infantile Hemangioma
The objective of this study was to determine whether apparent diffusion coefficient (ADC) values obtained from diffusion-weighted imaging allow differentiation between infantile hemangiomas (IHs) and malignant soft tissue tumors. Methods A retrospective review was performed on magnetic resonance images of pediatric patients with IHs and malignant soft tissue tumors from January 2014 to December 2016, which comprised 7 patients with 8 IHs and 6 patients with 6 malignant soft tissue tumors. We calculated and compared the ADC values of each lesion. Receiver operating characteristic curve analysis was performed to determine...
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

The Value of 1H-MRS and MRI in Combined Methylmalonic Aciduria and Homocystinuria
Conclusions Methylmalonic aciduria and homocystinuria patients with metabolite changes in the basal ganglia demonstrate compromised neuronal integrity, and anerobic metabolism occurs in acute encephalopathic episodes. 1H-MRS is a useful tool for evaluating brain damage. Hydrocephalus and diffuse supratentorial white matter edema are the main MRI features. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Artifact Reduction in the Diagnosis of Vasospasm in Computed Tomographic Perfusion: Potential of Iterative Metal Artifact Reduction
This study aimed to analyze the possibility of artifact reduction using a new iterative metal artifact reduction algorithm (iMAR) in the diagnosis of perfusion deficits due to vasospasms and to evaluate its clinical relevance. Methods Sixty-one volume perfusion computed tomographies of 24 patients after coiling or aneurysm clipping were reconstructed using standard-filtered back-projection and iMAR retrospectively. The degree of artifacts was evaluated as well as the size of the nonevaluable area. Diagnostic performance was evaluated compared with digital subtraction angiography. Results Artifacts were present in 39 ...
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Abnormal Neural Activity in Children With Diffuse Intrinsic Pontine Glioma Had Manifested Deficit in Behavioral Inhibition: A Resting-State Functional MRI Study
Conclusions These findings of focal spontaneous hyperfunction and hypofunction, which correlate with deficit in behavioral inhibition processing, and the abnormal brain regions are considered to be inefficient (in regions of the brain that may relate to compensatory brain and behavioral functioning, and it may be that the brain region needs to exert extra energy to perform a task to the same degree as the control group) or inability (inability in a certain region, or underpowered), pointing to a pathophysiologic process in executive dysfunction. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Blood Oxygen Level–Dependent Response Changes in the Ipsilateral Primary Somatosensory Cortex and Thalamus of Patients With Moyamoya Disease During Median Nerve Electrical Stimulation
Conclusions During sensory stimulation treatment, BOLD response changes occurred in the ipsilateral SI and thalamus of MMD patients. These changes enabled the contralateral hemisphere of the brain to better deal with sensory stimuli. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Development of a Standardized Grading Scale for Atherosclerotic Disease of the Head and Neck
Conclusions A simple, visual grading scale for atherosclerosis in head/neck CT angiography was used to standardize reporting and better characterize a patient's risk of stroke. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Clinical Applications of Arterial Spin Labeling in Brain Tumors
The aim of this review was to review the basic background, technique, and clinical applications of arterial spin labeling in brain tumors. Arterial spin labeling is used for differentiation of brain tumors from nonneoplastic lesions such as infarction and infection. It has a role in the grading of gliomas and in the differentiation of gliomas from lymphomas and metastasis. It is used for detection of the best biopsy site and prediction of treatment response. Arterial spin labeling is used for the assessment of extra-axial tumors and pediatric tumors. Last, it has a role in the differentiation of tumor recurrence from postr...
Source: Journal of Computer Assisted Tomography - July 1, 2019 Category: Radiology Tags: Neuroradiology Source Type: research

Ultrasound Visualization of Torsional Anatomic Changes From External Rotation of the Anterior Shoulder
Conclusion Movement into external rotation changes the sonographic appearance of the anatomic relationships of the anterior shoulder. Knowledge of these torsional changes can have both diagnostic and therapeutic implications. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2019 Category: Radiology Tags: Graphic Anatomy Source Type: research

Computed Tomography–Colonography With Intravenous Contrast Medium and Urographic Phase for the Evaluation of Pelvic Deep Infiltrating Endometriosis of Intestinal and Urinary Tract
Conclusions Computed tomography–colonography with intravenous contrast medium and urographic phase is a useful technique for the preoperative planning of selected women with DIE, in particular, for the detection of sigmoid colon and bladder lesions especially when performed with a dose reduction protocol. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - May 1, 2019 Category: Radiology Tags: Abdominal Imaging Source Type: research