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AJR. American Journal of Roentgenology

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https://www.readbyqxmd.com/read/30300009/association-of-the-gross-appearance-of-intratumoral-vascularity-at-mdct-with-the-carbonic-anhydrase-ix-score-in-clear-cell-renal-cell-carcinoma
#1
Jonathan R Young, Heidi Coy, Hyun J Kim, Michael Douek, Anthony Sisk, Allan J Pantuck, Steven S Raman
OBJECTIVE: The purpose of this study was to determine whether qualitative MDCT features are associated with the carbonic anhydrase IX (CAIX) score of clear cell renal cell carcinoma (RCC). The CAIX score has been previously found to have prognostic significance for disease-free survival, overall survival, and lymph node involvement. MATERIALS AND METHODS: A cohort of 105 histologically proven clear cell RCCs in patients who underwent preoperative four-phase renal mass MDCT was derived from 2001 to 2013...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30300008/venous-malformations-phleboliths-correlate-with-the-presence-of-arteriovenous-microshunts
#2
Simone Hammer, Florian Zeman, Claudia Fellner, Walter A Wohlgemuth, Wibke Uller
OBJECTIVE: The objective of this study was to identify differences between venous malformations (VMs) with arteriovenous (AV) microshunts and VMs without AV microshunts. MATERIALS AND METHODS: In this retrospective study, 83 patients with untreated VMs of the extremities underwent a prospectively defined MRI protocol performed at 3 T. MR images were reviewed to determine localization and extent of each VM and tissue involvement. The VM volume and the lesion volume relative to body surface were measured...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30300007/downstream-costs-associated-with-incidental-pancreatic-cysts-detected-at-mri
#3
Andrew B Rosenkrantz, Xi Xue, Soterios Gyftopoulos, Danny C Kim, Gregory N Nicola
OBJECTIVE: The purpose of this study is to assess downstream costs associated with pancreatic cysts incidentally detected at MRI. MATERIALS AND METHODS: Two hundred patients with an incidental pancreatic cyst detected at MRI were identified. Downstream events (imaging, office visits, endoscopic ultrasound-guided fine-needle aspiration, or chemotherapy) were identified from the electronic medical record. Radiologists' recommendations and ordering physician management were classified relative to the American College of Radiology (ACR) incidental findings committee recommendations...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30300006/detection-of-traumatic-pediatric-elbow-joint-effusion-using-a-deep-convolutional-neural-network
#4
Joseph R England, Jordan S Gross, Eric A White, Dakshesh B Patel, Jasmin T England, Phillip M Cheng
OBJECTIVE: The purpose of this study is to determine whether a deep convolutional neural network (DCNN) trained on a dataset of limited size can accurately diagnose traumatic pediatric elbow effusion on lateral radiographs. MATERIALS AND METHODS: A total of 901 lateral elbow radiographs from 882 pediatric patients who presented to the emergency department with upper extremity trauma were divided into a training set (657 images), a validation set (115 images), and an independent test set (129 images)...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30300005/utility-of-fdg-pet-ct-in-the-characterization-of-sinonasal-neoplasms-analysis-of-standardized-uptake-value-parameters
#5
Kerem Ozturk, Mehmet Gencturk, Emiro Caicedo-Granados, Faqian Li, Zuzan Cayci
OBJECTIVE: We aimed to evaluate the contribution of different standardized uptake value (SUV) parameters generated from pretreatment 18 F-FDG PET/CT in the characterization of sinonasal neoplasms with histopathologic correlations. MATERIALS AND METHODS: This retrospective study included 97 consecutive patients (58 men, 39 women; age range, 20-93 years; mean age, 62 years) with pathologically proven untreated sinonasal neoplasms who underwent FDG PET/CT from February 2010 to August 2017...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30300004/poststernotomy-complications-a-multimodal-review-of-normal-and-abnormal-postoperative-imaging-findings
#6
Partha Hota, Chandra Dass, Cherie Erkmen, Achala Donuru, Maruti Kumaran
OBJECTIVE: The purpose of this article is to review the normal postoperative appearance of various sternotomy configurations as well as the pathophysiologic and imaging characteristics of sternotomy complications on radiographs, MDCT, MRI, and scintigraphy. CONCLUSION: Clinical signs of sternotomy complications are nonspecific and often overlap with normal postoperative changes. Knowledge of normal and abnormal imaging findings is essential to guide management and treatment...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30300003/comparison-of-standard-breath-held-free-breathing-and-compressed-sensing-2d-gradient-recalled-echo-mr-elastography-techniques-for-evaluating-liver-stiffness
#7
Cara E Morin, Jonathan R Dillman, Suraj D Serai, Andrew T Trout, Jean A Tkach, Hui Wang
OBJECTIVE: The objective of our study was to compare standard breath-held, free-breathing, and compressed sensing (CS) accelerated 2D gradient-recalled echo (GRE) MR elastography (MRE) techniques for measuring liver stiffness. SUBJECTS AND METHODS: Twenty-five adult volunteers (20 without liver disease and five with liver disease) underwent MRE with five different 2D GRE techniques: breath-held; free-breathing; and CS with acceleration factors of 1.5, 2, and 3. Four axial images were obtained through the mid liver with each technique, and liver stiffness measurements (in kilopascals) were made by three blinded readers using elastograms with 95% confidence maps...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30300002/improving-diagnosis-of-primary-prostate-cancer-with-combined-68-ga-prostate-specific-membrane-antigen-hbed-cc-simultaneous-pet-and-multiparametric-mri-and-clinical-parameters
#8
Amarnath Jena, Rajesh Taneja, Sangeeta Taneja, Aru Singh, Venkatesh Kumar, Anshuman Agarwal, Narasimhan Subramanian
OBJECTIVE: The current study was designed to test the diagnostic performance of 68 Ga-prostate-specific membrane antigen (PSMA) PET and multiparametric MRI along with clinical parameters in the characterization of prostatic lesions. MATERIALS AND METHODS: Eighty-two men with 63 malignant and 21 benign histologically proven prostate lesions who underwent complete clinical workup were included in this retrospective study. All patients underwent simultaneous whole-body 68 Ga-PSMA PET/MRI with dedicated multiparametric MRI...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30300001/opportunistic-screening-for-hereditary-hemochromatosis-with-unenhanced-ct-determination-of-an-optimal-liver-attenuation-threshold
#9
Edward M Lawrence, B Dustin Pooler, Perry J Pickhardt
OBJECTIVE: The purpose of this study was to assess whether a specific liver attenuation threshold for unenhanced CT allows both sensitive opportunistic detection of unsuspected hereditary hemochromatosis and low overall screening test-positive rates. MATERIALS AND METHODS: We used a standard ROI placement method on unenhanced CT studies of 3357 consecutive adults (mean age, 57.0 years) with no symptoms of liver disease who underwent colorectal screening. Hepatic attenuation (in HU) was measured to assess test-positive rates at various liver attenuation thresholds...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30300000/value-of-mammography-for-women-30-39-years-old-presenting-with-breast-symptoms
#10
Ying Chen, Shinn-Huey S Chou, Eric M Blaschke, Michelle C Specht, Constance D Lehman
OBJECTIVE: The purpose of this study was to determine the performance and added value of bilateral mammography in identifying cancers distant from sites of presenting breast symptoms in women 30-39 years old. MATERIALS AND METHODS: A search identified consecutively registered women 30-39 years old who underwent mammography and ultrasound to evaluate focal breast symptoms between June 2006 and August 2016. Outcomes were determined by imaging and pathologic analysis through linkage with a tumor registry...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30299999/simulated-dose-reduction-for-abdominal-ct-with-filtered-back-projection-technique-effect-on-liver-lesion-detection-and-characterization
#11
Tobias Fält, Marcus Söderberg, Lisa Hörberg, Christina Christoffersen, Kristina Lång, Kasim Abul-Kasim, Peter Leander
OBJECTIVE: Previous studies have shown the possibility to reduce radiation dose in abdominal CT by 25-50% without negatively affecting detection of liver lesions. How radiation dose reduction affects characterization of liver metastases is not as well known. The objective of this study was to investigate how different levels of simulated dose reduction affect the detection and characterization of liver lesions, primarily hypovascular metastases. A secondary objective was to analyze the relationship between the lesion size and contrast-to-noise ratio (CNR) and the detection rate...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30299998/comparison-of-metal-artifact-reduction-in-dual-and-single-source-ct-a-vertebral-phantom-study
#12
Philippe Jagoda, Daniel Schmitz, Stefan Wagenpfeil, Arno Bücker, Peter Minko
OBJECTIVE: The objective of this study was to compare the capability of two algorithms for metal artifact reduction and virtual monoenergetic imaging (VME), a metal artifact reduction application for dual-source CT. MATERIALS AND METHODS: A bovine vertebra phantom with 16 artificial osteolyses and two 20 × 4.5 mm stainless steel screws was scanned on two single-source CT scanner and one dual-source CT scanner at a dose identical to the single-source acquisitions...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30299997/imaging-evaluation-of-the-adult-presenting-with-new-onset-seizure
#13
Eric Tranvinh, Bryan Lanzman, James Provenzale, Max Wintermark
OBJECTIVE: The purpose of this study is to discuss the evidence supporting the use of neuroimaging in adult patients presenting with new-onset seizure. CONCLUSION: Unenhanced CT should be the initial imaging examination performed for adults presenting with first unprovoked seizure in the acute setting to exclude conditions requiring urgent or emergent intervention. MRI has added benefits and should be considered for adults presenting acutely for whom the initial CT is negative and for those presenting with new-onset seizure in the nonacute setting...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30299996/maturation-related-changes-in-t2-relaxation-times-of-cartilage-and-meniscus-of-the-pediatric-knee-joint-at-3-t
#14
Jie C Nguyen, Hailey Allen, Fang Liu, Kaitlin M Woo, Zhaoye Zhou, Richard Kijowski
OBJECTIVE: The objective of our study was to use a T2 mapping sequence performed at 3 T to investigate changes in the composition and microstructure of the cartilage and menisci of the pediatric knee joint during maturation. MATERIALS AND METHODS: This retrospective study was performed of MRI examinations of 76 pediatric knees without internal derangement in 72 subjects (29 boys [mean age, 12.5 years] and 43 girls [mean age, 13.0 years]) who were evaluated with a sagittal T2 mapping sequence...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30299995/histogram-analysis-of-adrenal-lesions-with-a-single-measurement-for-10th-percentile-feasibility-and-incremental-value-for-diagnosing-adenomas
#15
Tamara Oliveira Rocha, Tales Cavalcanti Albuquerque, Júlio Cesar Nather, Carlos Ernesto Garrido Salmon, Silvio Tucci, Jane Zheng Wang, Antonio Carlos Westphalen, Jorge Elias, Valdair Francisco Muglia
OBJECTIVE: Our purpose was to assess whether histogram analysis of adrenal lesions from a single measurement of mean attenuation and SD, using a threshold of 10% of negative voxels, can replace voxel counting while maintaining diagnostic accuracy. MATERIALS AND METHODS: In a 4-year period, 325 adrenal lesions were detected on CT examinations of 308 consecutive patients. After exclusions, 91 patients with 108 lesions, including 20 malignant lesions and 88 adenomas (defined by histologic results or follow-up), were enrolled...
October 9, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30247982/hepatopancreaticobiliary-imaging-second-opinion-consultations-is-there-value-in-the-second-reading
#16
Anup S Shetty, Ashmit Mittal, Amber Salter, Vamsi R Narra, Kathryn J Fowler
OBJECTIVE: Tertiary care practices increasingly provide second-opinion consultations on reports from outside practices or institutions. This practice of providing a second opinion has been studied in a variety of subspecialties; however, its potential effect on the management of hepatopancreaticobiliary (HPB) disease is not known. The purpose of this study was to assess the rate of significant discrepancies between the initial report and the consultation report, the source of discrepancies, and the frequency of repeat imaging recommendations...
September 24, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30247981/mri-guided-cryoablation-of-epidural-malignancies-in-the-spinal-canal-resulting-in-neural-decompression-and-regrowth-of-bone
#17
Thomas C Lee, Jeffrey P Guenette, Ziev B Moses, John H Chi
OBJECTIVE: The purpose of this article is to describe the use of MRI to safely monitor cryoablation for the treatment of spinal epidural malignancies. CONCLUSION: Use of MRI guidance to monitor percutaneous cryoablation allows ablation margins more distinct than those allowed by heat-based ablation modalities. MRI-guided cryoablation is a feasible option for treating epidural tumors involving the spinal canal, resulting in successful decompression of the tumor away from the spinal cord with regrowth of previously eroded bone around the spinal canal...
September 24, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30247980/introduction-of-microwave-ablation-into-a-renal-ablation-practice-valuable-lessons-learned
#18
Scott M Thompson, John J Schmitz, R Houston Thompson, Adam J Weisbrod, Brian T Welch, Boyd R Viers, James D Hannon, Grant D Schmit, Thomas D Atwell, A Nick Kurup
OBJECTIVE: The purpose of this study was to evaluate the early outcomes of percutaneous microwave ablation (MWA) for clinical stage T1 (cT1) renal masses when performed within a high-volume ablation practice with critical emphasis on procedural safety. MATERIALS AND METHODS: A retrospective review of a percutaneous renal ablation registry identified 26 patients with a total of 27 cT1 renal masses treated with MWA between 2011 and 2017. Mean patient age was 63.8 years and 16 (61...
September 24, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30247979/the-multidisciplinary-approach-to-the-diagnosis-and-management-of-nonobstetric-traumatic-brachial-plexus-injuries
#19
Adam D Singer, Clifton Meals, Vita Kesner, Nicholas Boulis, Felix M Gonzalez, Monica Umpierrez, Avneesh Chhabra
OBJECTIVE: Nonobstetric traumatic brachial plexus injuries can result in significant morbidity and chronic disability if not managed in a timely manner. Functional arm recovery is possible, but it requires a multidisciplinary approach toward the diagnosis and management of such injuries. CONCLUSION: This article provides an overview of the clinical, electrophysiology, and diagnostic imaging knowledge needed for accurate imaging interpretation and to participate in multidisciplinary discussions aimed at expediting optimal patient management...
September 24, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/30247978/postpartum-bone-marrow-edema-at-the-sacroiliac-joints-may-mimic-sacroiliitis-of-axial-spondyloarthritis-on-mri
#20
Christoph A Agten, Veronika Zubler, Marco Zanetti, Christoph A Binkert, Orpheus Kolokythas, Elke Prentl, Florian M Buck, Christian W A Pfirrmann
OBJECTIVE: The objective of our study was to compare MRI findings in the sacroiliac joints of postpartum women (as a model of mechanical changes) and women with known axial spondyloarthritis (as an inflammatory model). SUBJECTS AND METHODS: For this prospective multicenter age-matched, case-control study, sacroiliac joint MRI examinations of 30 healthy women (mean age, 34.0 years) in the early postpartum period (mechanical group) and 30 age-matched women (mean age, 33...
September 24, 2018: AJR. American Journal of Roentgenology
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