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AJR. American Journal of Roentgenology

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https://www.readbyqxmd.com/read/28095036/differentiation-of-clear-cell-renal-cell-carcinoma-from-other-renal-cortical-tumors-by-use-of-a-quantitative-multiparametric-mri-approach
#1
Andreas M Hötker, Yousef Mazaheri, Andreas Wibmer, Christoph A Karlo, Junting Zheng, Chaya S Moskowitz, Satish K Tickoo, Paul Russo, Hedvig Hricak, Oguz Akin
OBJECTIVE: The purpose of this study was to develop a quantitative multiparametric MRI approach to differentiating clear cell renal cell carcinoma (RCC) from other renal cortical tumors. MATERIALS AND METHODS: This retrospective study included 119 patients with 124 histopathologically confirmed renal cortical tumors who underwent preoperative MRI including DWI, contrast-enhanced, and chemical-shift sequences before nephrectomy. Two radiologists independently assessed each tumor volumetrically, and apparent diffusion coefficient values, parameters from multiphasic contrast-enhanced MRI (peak enhancement, upslope, downslope, AUC), and chemical-shift indexes were calculated...
January 17, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28095024/pathologic-subtypes-of-ampullary-adenocarcinoma-value-of-ampullary-mdct-for-noninvasive-preoperative-differentiation
#2
Aleksandar M Ivanovic, Francesco Alessandrino, Ruzica Maksimovic, Marjan Micev, Slavenko Ostojic, Richard M Gore, Koenraad J Mortele
OBJECTIVE: The purpose of this study was to evaluate the utility of ampullary MDCT in the noninvasive, preoperative differentiation of pancreatobiliary and intestinal subtypes of ampullary adenocarcinoma. MATERIALS AND METHODS: This retrospective study included 32 patients (20 men, 12 women; age range, 41-81 years) with resected ampullary adenocarcinoma who underwent preoperative contrast-enhanced ampullary MDCT. Two radiologists, blinded to pathologic diagnosis of adenocarcinoma subtype, evaluated the presence of seven MDCT features independently...
January 17, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28095023/reply-to-vertebral-venous-congestion-mimicking-sclerotic-metastasis-in-the-absence-of-venous-obstruction
#3
Lionel Arrivé, Laurence Monnier-Cholley, Eric Maury
No abstract text is available yet for this article.
January 17, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28095022/estimating-effective-dose-of-radiation-from-pediatric-cardiac-ct-angiography-using-a-64-mdct-scanner-new-conversion-factors-relating-dose-length-product-to-effective-dose
#4
Sigal Trattner, Anjali Chelliah, Peter Prinsen, Carrie B Ruzal-Shapiro, Yanping Xu, Sachin Jambawalikar, Maxwell Amurao, Andrew J Einstein
OBJECTIVE: The purpose of this study is to determine the conversion factors that enable accurate estimation of the effective dose (ED) used for cardiac 64-MDCT angiography performed for children. MATERIALS AND METHODS: Anthropomorphic phantoms representative of 1- and 10-year-old children, with 50 metal oxide semiconductor field-effect transistor dosimeters placed in organs, underwent scanning performed using a 64-MDCT scanner with different routine clinical cardiac scan modes and x-ray tube potentials...
January 17, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28095021/reply-to-comment-on-maximum-intensity-projection-and-computer-aided-detection-algorithms-as-stand-alone-reader-devices-in-lung-cancer-screening-using-different-dose-levels-and-reconstruction-kernels
#5
Lukas Ebner, Justus E Roos, Andreas Christe
No abstract text is available yet for this article.
January 17, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28095020/current-status-of-ventilation-perfusion-scintigraphy-for-suspected-pulmonary-embolism
#6
Darlene Metter, Mark Tulchinsky, Leonard M Freeman
OBJECTIVE: The purpose of this article is to outline recent progress made in ventilation-perfusion (V/Q) scintigraphy imaging techniques and the interpretation systems used for the diagnosis of pulmonary embolism (PE). Various state-of-the-art approaches that can be selected according to the needs dictated by the medical practice environment and specific patient groups are presented. CONCLUSION: Although advances in tomographic imaging have certainly improved the sensitivity of V/Q scans for the diagnosis of PE, they may lead to overdiagnosis by revealing small and clinically insignificant PEs...
January 17, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28095019/elbow-injuries-in-adult-overhead-athletes
#7
Tony T Wong, Dana J Lin, Rama S Ayyala, Jonathan K Kazam
OBJECTIVE: The purpose of this article is to review common elbow injuries found in overhead athletes with focus on mechanism, clinical features, imaging appearance, and treatment options. CONCLUSION: The overhead throwing motion subjects the elbow to a variety of complex forces, which places both osseous and soft-tissue structures at high risk for injury.
January 17, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28095018/hallway-conversations-in-physicswhat-is-the-typical-effective-dose-from-a-routine-eye-to-thigh-pet-ct-examination-assuming-an-injected-18-f-fdg-dose-of-370-mbq
#8
Shalmali Dharmadhikari, James R Galt, Jonathon A Nye
No abstract text is available yet for this article.
January 17, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28095017/spectrum-of-xanthogranulomatous-processes-in-the-abdomen-and-pelvis-a-pictorial-review-of-infectious-inflammatory-and-proliferative-responses
#9
Kelsey S Bourm, Christine O Menias, Kamran Ali, Kinan Alhalabi, Khaled M Elsayes
OBJECTIVE: Xanthogranulomatous (XG) processes are rare inflammatory conditions with the characteristic pathologic feature of lipid-laden macrophages or histiocyte cells. Imaging findings are nonspecific and can simulate aggressive neoplastic processes. XG processes can be caused by infection, inflammation, histolytic process, or an inherited lysosomal disorder. XG infectious processes are mainly seen in cholecystitis and pyelonephritis, but several other organs can also be involved. Histiocytic processes can be divided into Langerhans and non-Langerhans cell histiocytosis...
January 17, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28095016/renal-masses-detected-on-fdg-pet-ct-in-patients-with-lymphoma-imaging-features-differentiating-primary-renal-cell-carcinomas-from-renal-lymphomatous-involvement
#10
Carlos Nicolau, Evis Sala, Anita Kumar, Debra A Goldman, Heiko Schoder, Hedvig Hricak, Hebert Alberto Vargas
OBJECTIVE: The purpose of this study is to analyze the (18)F-FDG PET/CT features of solid renal masses detected in patients with lymphoma and to evaluate the ability of PET/CT to differentiate renal cell carcinoma (RCC) from renal lymphomatous involvement. MATERIALS AND METHODS: Thirty-six patients with solid renal masses on PET/CT performed for staging or follow-up of lymphoma were evaluated retrospectively. The features recorded for each renal mass included the following standardized uptake values (SUVs) on PET/CT: the maximum SUV (SUVmax), the mean SUV (SUVmean), the ratio of the SUVmax of the tumor to that of the normal kidney cortex, the ratio of the SUVmean of the tumor to that of the normal kidney cortex, the ratio of the SUVmax of the tumor to that of the normal liver, and the ratio of the SUVmean of the tumor to that of the normal liver...
January 17, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28095015/medicolegal-malpractice-and-ethical-issues-in-radiology-professional-liability-malpractice-insurance-occurrence-versus-claims-made
#11
Leonard Berlin
No abstract text is available yet for this article.
January 17, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28075651/imaging-characteristics-of-prostate-cancer-patients-who-discontinued-active-surveillance-on-3-t-multiparametric-prostate-mri
#12
David J Habibian, Corinne C Liu, Alex Dao, Kaitlin E Kosinski, Aaron E Katz
OBJECTIVE: Early-stage prostate cancer may be followed with active surveillance to avoid overtreatment. Our institution's active surveillance regimen uses annual MRI in place of serial biopsies, and biopsies are performed only when clinically necessary. The objective of our study was to report the multiparametric MRI characteristics of prostate cancer patients who discontinued active surveillance at our institution after repeat imaging revealed possible evidence of tumor upgrading. MATERIALS AND METHODS: The Department of Urology at Winthrop University Hospital prospectively maintains a database of prostate cancer patients who are monitored with active surveillance...
January 11, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28075625/unenhanced-and-contrast-enhanced-mr-angiography-and-perfusion-imaging-for-suspected-pulmonary-thromboembolism
#13
Yoshiharu Ohno, Takeshi Yoshikawa, Yuji Kishida, Shinichiro Seki, Nevzat Karabulut
OBJECTIVE: This article discusses the basics of unenhanced MR angiography (MRA) and MR venography (MRV), time-resolved contrast-enhanced (CE) MRA and dynamic first-pass CE perfusion MRI, and unenhanced and CE MRV, in addition to assessing the clinical relevance of these techniques for evaluating patients with suspected pulmonary thromboembolism and deep venous thrombosis. CONCLUSION: Since the 1990s, the efficacy of MRA or MRV and dynamic perfusion MRI for patients with suspected pulmonary thromboembolism and deep venous thrombosis has been evaluated...
January 11, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28075624/use-of-preprocedural-mdct-for-cardiac-implantable-electric-device-lead-extraction-frequency-of-findings-that-change-management
#14
Wendy L Ehieli, Daniel T Boll, Daniele Marin, Robert Lewis, Jonathan P Piccini, Lynne M Hurwitz
OBJECTIVE: Five percent of cardiac implantable electric devices (CIEDs) are removed each year. Percutaneous extraction is preferred but can be complicated if the leads adhere to the vasculature or perforate. The goal of this study is to assess the frequency of findings on dedicated MDCT that alter preprocedural planning for percutaneous CIED extraction. MATERIALS AND METHODS: One hundred patients with CIEDs who underwent MDCT before percutaneous lead extraction were analyzed...
January 11, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28075623/identifying-hidden-zones-of-the-far-posterior-cartilage-of-the-femoral-condyles-not-visible-during-knee-arthroscopy
#15
Mark J Sando, Sean S Rajaee, Joseph P Liu, Michael Banffy, Orr Limpisvasti, John V Crues
OBJECTIVE: The purpose of this study was to compare standard knee arthroscopic and MRI findings and measurements for visualization of the femoral condyle articular cartilage. The hypothesis was that certain posterior cartilage defects identified with MRI may not be accessible with routine arthroscopy. MATERIALS AND METHODS: Six cadaveric knees were examined by routine arthroscopy through standard inferomedial and inferolateral portals. Suture anchors were inserted into the femoral condyles at 30°, 60°, 90°, and 120° of flexion as markers of the cartilage surface at the most posterior aspect of the condyle that could be accessed at each degree of flexion...
January 11, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28075622/imaging-surveillance-after-primary-breast-cancer-treatment
#16
Diana L Lam, Nehmat Houssami, Janie M Lee
OBJECTIVE: Current clinical guidelines are consistent in supporting annual mammography for women after treatment of primary breast cancer. Surveillance imaging beyond standard digital mammography, including digital breast tomosynthesis (DBT), breast ultrasound, and MRI, may improve outcomes. This article reviews the evidence on the performance and effectiveness of breast imaging modalities available for surveillance after treatment of sporadic unilateral primary breast cancer and identifies additional factors to be considered when selecting an imaging surveillance regimen...
January 11, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28075621/key-principles-in-quality-and-safety-in-radiology
#17
Hani Abujudeh, Rathachai Kaewlai, Khalid Shaqdan, Michael A Bruno
OBJECTIVE: The purpose of this article is to introduce the reader to basic concepts of quality and safety in radiology. CONCLUSION: Concepts are introduced that are keys to identifying, understanding, and utilizing certain quality tools with the aim of making process improvements. Challenges, opportunities, and change drivers can be mapped from the radiology quality perspective. Best practices, informatics, and benchmarks can profoundly affect the outcome of the quality improvement initiative we all aim to achieve...
January 11, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28075620/diagnostic-efficacy-of-structural-mri-in-patients-with-mild-to-moderate-alzheimer-disease-automated-volumetric-assessment-versus-visual-assessment
#18
Jeeyoung Min, Won-Jin Moon, Ji Young Jeon, Jin Woo Choi, Yeon-Sil Moon, Seol-Heui Han
OBJECTIVE: The purpose of this study was to compare the diagnostic efficacies of an automated volumetric assessment tool and visual assessment in the evaluation of medial temporal lobar atrophy in mild-to-moderate Alzheimer disease (AD). MATERIALS AND METHODS: This retrospective study included 30 patients with mild-to-moderate AD and 25 age-matched healthy control subjects undergoing MRI with a 3D fast spoiled gradient recalled-echo sequence at 3 T. The images were processed with fully automated volumetric analysis software...
January 11, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28075619/role-of-ct-in-the-diagnosis-of-nonspecific-abdominal-pain-a-multicenter-analysis
#19
Jonathan D Eisenberg, Andrew T Reisner, William D Binder, Atif Zaheer, Martin L Gunn, Ken F Linnau, Chad M Miller, Angela C Tramontano, Maurice S Herring, Emily C Dowling, Elkan F Halpern, Karen Donelan, G Scott Gazelle, Pari V Pandharipande
OBJECTIVE: The objective of our study was to determine whether specific patient and physician factors-known before CT-are associated with a diagnosis of nonspecific abdominal pain (NSAP) after CT in the emergency department (ED). MATERIALS AND METHODS: We analyzed data originally collected in a prospective multicenter study. In the parent study, we identified ED patients referred to CT for evaluation of abdominal pain. We surveyed their physicians before and after CT to identify changes in leading diagnoses, diagnostic confidence, and admission decisions...
January 11, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28075617/medicolegal-malpractice-and-ethical-issues-in-radiology
#20
Leonard Berlin
No abstract text is available yet for this article.
January 11, 2017: AJR. American Journal of Roentgenology
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