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Academic Radiology

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https://www.readbyqxmd.com/read/28214228/coronary-artery-stent-evaluation-with-model-based-iterative-reconstruction-at-coronary-ct-angiography
#1
Fuminari Tatsugami, Toru Higaki, Hiroaki Sakane, Wataru Fukumoto, Yoko Kaichi, Makoto Iida, Yasutaka Baba, Masao Kiguchi, Yasuki Kihara, So Tsushima, Kazuo Awai
RATIONALE AND OBJECTIVES: This study aims to compare the image quality of coronary artery stent scans on computed tomography images reconstructed with forward projected model-based iterative reconstruction solution (FIRST) and adaptive iterative dose reduction 3D (AIDR 3D). MATERIALS AND METHODS: Coronary computed tomography angiography scans of 23 patients with 32 coronary stents were used. The images were reconstructed with AIDR 3D and FIRST. We generated computed tomography attenuation profiles across the stents and measured the width of the edge rise distance and the edge rise slope (ERS)...
February 14, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28214227/automated-breast-density-computation-in-digital-mammography-and-digital-breast-tomosynthesis-influence-on-mean-glandular-dose-and-birads-density-categorization
#2
Maria Castillo-García, Margarita Chevalier, Julia Garayoa, Alejandro Rodriguez-Ruiz, Diego García-Pinto, Julio Valverde
RATIONALE AND OBJECTIVES: The study aimed to compare the breast density estimates from two algorithms on full-field digital mammography (FFDM) and digital breast tomosynthesis (DBT) and to analyze the clinical implications. MATERIALS AND METHODS: We selected 561 FFDM and DBT examinations from patients without breast pathologies. Two versions of a commercial software (Quantra 2D and Quantra 3D) calculated the volumetric breast density automatically in FFDM and DBT, respectively...
February 14, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28189507/radiology-education-of-physician-extenders-what-role-should-radiologists-play
#3
REVIEW
Jamie L RiChard, Benjamin P Liu, David D Casalino, Eric J Russell, Jeanne M Horowitz
As physician extenders (PEs) enter the medical community in large numbers, they have an increasing impact on imaging utilization and imaging-based procedures. Physician assistants (PAs) and nurse practitioners (NPs) have an advanced level of education and some practice autonomously. However, PA and NP programs are not required to provide any basic radiology education. For PEs who did receive basic radiology education during their graduate program, the curriculum is nonstandard and there is a wide variation...
February 8, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28189506/radiology-pathology-conference-reviving-the-art-of-oral-case-presentation-in-residency
#4
Susan Sotardi, Meir H Scheinfeld, Judah Burns, Mordecai Koenigsberg, Jose G Mantilla, Shlomit Goldberg-Stein
RATIONALE AND OBJECTIVES: To improve resident oral case communication and preparatory skills by providing residents an opportunity to prepare for and conduct a new interdisciplinary Radiology-Pathology (Rad-Path) conference series. MATERIALS AND METHODS: To assess whether conference goals were being achieved, we surveyed trainees and attendings in the radiology and pathology departments. Percentages were examined for each variable. Mann-Whitney U test for ordinal variable significance was applied to determine statistical significance between radiology trainee and attending survey responses...
February 8, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28189505/how-does-the-display-luminance-level-affect-detectability-of-breast-microcalcifications-and-spiculated-lesions-in-digital-breast-tomosynthesis-dbt-images
#5
Claudio Ferranti, Alessandra Primolevo, Francesco Cartia, Claudia Cavatorta, Chiara Maura Ciniselli, Manuela Lualdi, Silvia Meroni, Emanuele Pignoli, Maddalena Plebani, Claudio Siciliano, Paolo Verderio, Gianfranco Scaperrotta
RATIONALE AND OBJECTIVES: This study evaluates the influence of the calibrated luminance level of medical displays in the detectability of microcalcifications and spiculated lesions in digital breast tomosynthesis images. MATERIALS AND METHODS: Four models of medical displays with calibrated maximum and minimum luminance, respectively, ranging from 500 to 1000 cd/m(2) and from 0.5 to 1.0 cd/m(2), were investigated. Forty-eight studies were selected by a senior radiologist: 16 with microcalcifications, 16 with spiculated lesions, and 16 without lesions...
February 8, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28189504/missteps-in-estimates-of-cancer-overdiagnosis
#6
LETTER
Archie Bleyer
No abstract text is available yet for this article.
February 8, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28188043/digital-breast-tomosynthesis-practice-patterns-following-2011-fda-approval-a-survey-of-breast-imaging-radiologists
#7
Yiming Gao, James S Babb, Hildegard K Toth, Linda Moy, Samantha L Heller
RATIONALE AND OBJECTIVES: To evaluate uptake, patterns of use, and perception of digital breast tomosynthesis (DBT) among practicing breast radiologists. MATERIALS AND METHODS: Institutional Review Board exemption was obtained for this Health Insurance Portability and Accountability Act-compliant electronic survey, sent to 7023 breast radiologists identified via the Radiological Society of North America database. Respondents were asked of their geographic location and practice type...
February 7, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28169142/the-american-college-of-radiology-incidental-findings-committee-recommendations-for-management-of-incidental-lymph-nodes-a-single-center-evaluation
#8
Paul Smereka, Ankur M Doshi, Justin M Ream, Andrew B Rosenkrantz
RATIONALE AND OBJECTIVES: To assess the American College of Radiology Incidental Findings Committee's (ACR-IFC) recommendations for defining and following up abnormal incidental abdominopelvic lymph nodes. MATERIALS AND METHODS: A total of 59 lymph nodes satisfying ACR-IFC criteria as incidental (no malignancy or lymphoproliferative disorder) and with sufficient follow-up to classify as benign (biopsy, decreased size, ≥12-month stability) or malignant (biopsy, detection of primary malignancy combined with either fluorodeoxyglucose hyperactivity or increase in size of the node) were included...
February 3, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28169141/measuring-interobserver-disagreement-in-rating-diagnostic-characteristics-of-pulmonary-nodule-using-the-lung-imaging-database-consortium-and-image-database-resource-initiative
#9
Hongli Lin, Changxing Huang, Weisheng Wang, Jiawei Luo, Xuedong Yang, Yuling Liu
RATIONALE AND OBJECTIVES: The purpose of this study was to measure and analyze interobserver disagreement in rating diagnostic characteristics of pulmonary nodules on computed tomography scans using the Lung Imaging Database Consortium and Image Database Resource Initiative (LIDC/IDRI) database, and then to provide investigators with understanding the variability in rating diagnostic characteristics among radiologists. MATERIALS AND METHODS: A histogram-based accumulated nodule-level approach is proposed to measure interobserver disagreement in rating diagnostic characteristics of pulmonary nodules among radiologists...
February 3, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28169140/influence-of-cardiovascular-risk-factors-on-the-prevalence-of-coronary-atherosclerosis-in-patients-with-angiographically-normal-coronary-arteries
#10
Daniel O Bittner, Lutz Klinghammer, Mohamed Marwan, Jasmin Schmid, Christian Layritz, Udo Hoffmann, Stephan Achenbach, Tobias Pflederer
RATIONALE AND OBJECTIVES: Cardiovascular (CV) disease is predominately influenced by CV risk factors and coronary computed tomography angiography (CTA) is capable of detecting early-stage coronary artery disease. We sought to determine the influence of CV risk factors on the prevalence of nonobstructive atherosclerosis in patients with normal-appearing coronary arteries in invasive coronary angiography (ICA). MATERIALS AND METHODS: In this retrospective analysis, we included 60 consecutive symptomatic patients, having undergone ICA and coronary CTA...
February 3, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28162875/diagnosis-of-spinal-lesions-using-heuristic-and-pharmacokinetic-parameters-measured-by-dynamic-contrast-enhanced-mri
#11
Ning Lang, Huishu Yuan, Hon J Yu, Min-Ying Su
RATIONALE AND OBJECTIVES: This study aimed to evaluate the diagnostic performance of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) in differentiation of four spinal lesions by using heuristic and pharmacokinetic parameters analyzed from DCE signal intensity time course. MATERIALS AND METHODS: DCE-MRI of 62 subjects with confirmed myeloma (n = 9), metastatic cancer (n = 22), lymphoma (n = 7), and inflammatory tuberculosis (TB) (n = 24) in the spine were analyzed retrospectively...
February 2, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28153576/professional-social-networking-in-radiology-who-is-there-and-what-are-they-doing
#12
Sumir S Patel, C Matthew Hawkins, James V Rawson, Jenny K Hoang
RATIONALE AND OBJECTIVES: Although it is perceived that the use of social media professionally is increasing among radiologists, little is known about the habits and demographics of this subspecialty. This study aims to compare radiologists who use social networking for professional purposes to those who do not with regard to their characteristics, habits, and attitudes. MATERIALS AND METHODS: Radiologists were invited by e-mail and through posts on social networks to participate in a survey on the use of social media platforms...
January 30, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28153575/intraductal-papillary-mucinous-neoplasms-of-the-pancreas-correlation-of-helical-computed-tomography-ct-features-with-pathologic-findings
#13
Wanbo Xu, Xiaojin Liu, Jiawen Zhang, Li Yang
RATIONALE AND OBJECTIVES: Intraductal papillary mucinous neoplasms (IPMNs) are precancerous lesions of the pancreas. Computed tomography (CT) has been recommended to screen the malignant potential of IPMNs. However, data evaluating the use of CT to differentiate categories of IPMN based on disease progression are limited. This study aimed to explore the correlation between CT characteristics and pathology in IPMN associated with invasive carcinoma. MATERIALS AND METHODS: A total of 31 patients with intraductal papillary mucinous carcinoma (IPMC) treated at one local regional hospital in Shanghai, China, were enrolled in this study...
January 30, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28153574/low-yield-of-chest-radiography-in-general-inpatients-and-outpatients-with-positive-ppd-results-in-a-country-with-low-prevalence-of-tb
#14
Ronald L Eisenberg, Benedikt H Heidinger
RATIONALE AND OBJECTIVES: The purpose of this study was to assess the frequency and spectrum of abnormalities on routine screening chest radiographs among inpatients and outpatients with "positive purified protein derivative (PPD)" in a large tertiary care academic medical center in a country with low prevalence of tuberculosis (TB). MATERIALS AND METHODS: The reports of all chest radiographs of general inpatients and outpatients referred for positive PPD (2010-2014) were evaluated for the frequency of evidence of active or latent TB and the spectrum of imaging findings...
January 30, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28153573/development-and-assessment-of-a-novel-task-trainer-and-targeting-tasks-for-ultrasound-guided-invasive-procedures
#15
Joshua F Nitsche, Kristina M Shumard, Brian C Brost
RATIONALE AND OBJECTIVES: The American Institute of Ultrasound in Medicine (AIUM) recommends that all providers performing ultrasound-guided invasive procedures be competent in a core set of guidance skills common to all ultrasound-guided procedures, including in-plane and out-of-plane needle guidance and needle imaging optimization techniques such as probe translation, rotation, and heel-toe standoff. To allow for the practice and assessment of these core skills, we have created a novel task trainer and set of targeting tasks, and sought to obtain validity evidence in the content and response process domains for this training and assessment system according to the Standards for Educational and Psychological Testing...
January 30, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28139426/fixated-and-not-fixated-regions-of-mammograms-a-higher-order-statistical-analysis-of-visual-search-behavior
#16
Suneeta Mall, Patrick Brennan, Claudia Mello-Thoms
RATIONALE AND OBJECTIVES: Visual search is an inhomogeneous yet efficient sampling process accomplished by the saccades and the central (foveal) vision. Areas that attract the central vision have been studied for errors in interpretation of medical imaging. In this study, we extend existing visual search studies to understand what characterizes areas that receive direct visual attention and elicit a mark by the radiologist (True and False Positive decisions) from those that elicit a mark but were captured by the peripheral vision...
January 27, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28131498/3d-mri-for-quantitative-analysis-of-quadrant-percent-breast-density-correlation-with-quadrant-location-of-breast-cancer
#17
Jeon-Hor Chen, Fuyi Liao, Yang Zhang, Yifan Li, Chia-Ju Chang, Chen-Pin Chou, Tsung-Lung Yang, Min-Ying Su
RATIONALE AND OBJECTIVES: Breast cancer occurs more frequently in the upper outer (UO) quadrant, but whether this higher cancer incidence is related to the greater amount of dense tissue is not known. Magnetic resonance imaging acquires three-dimensional volumetric images and is the most suitable among all breast imaging modalities for regional quantification of density. This study applied a magnetic resonance imaging-based method to measure quadrant percent density (QPD), and evaluated its association with the quadrant location of the developed breast cancer...
January 25, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28131497/role-of-imaging-in-the-era-of-precision-medicine
#18
REVIEW
Angela Giardino, Supriya Gupta, Emmi Olson, Karla Sepulveda, Leon Lenchik, Jana Ivanidze, Rebecca Rakow-Penner, Midhir J Patel, Rathan M Subramaniam, Dhakshinamoorthy Ganeshan
Precision medicine is an emerging approach for treating medical disorders, which takes into account individual variability in genetic and environmental factors. Preventive or therapeutic interventions can then be directed to those who will benefit most from targeted interventions, thereby maximizing benefits and minimizing costs and complications. Precision medicine is gaining increasing recognition by clinicians, healthcare systems, pharmaceutical companies, patients, and the government. Imaging plays a critical role in precision medicine including screening, early diagnosis, guiding treatment, evaluating response to therapy, and assessing likelihood of disease recurrence...
January 25, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28130051/attending-radiologist-variability-and-its-effect-on-radiology-resident-discrepancy-rates
#19
Joseph C Wildenberg, Po-Hao Chen, Mary H Scanlon, Tessa S Cook
RATIONALE AND OBJECTIVES: Discrepancy rates for interpretations produced in a call situation are one metric to evaluate residents during training. Current benchmarks, reported in previous studies, do not consider the effects of practice pattern variability among attending radiologists. This study aims to investigate the impact of attending variability on resident discrepancy rates to determine if the current benchmarks are an accurate measure of resident performance and, if necessary, update discrepancy benchmarks to accurately identify residents performing below expectations...
January 24, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28130050/3d-printing-of-preoperative-simulation-models-of-a-splenic-artery-aneurysm-precision-and-accuracy
#20
Hidemasa Takao, Shiori Amemiya, Eisuke Shibata, Kuni Ohtomo
RATIONALE AND OBJECTIVES: Three-dimensional (3D) printing is attracting increasing attention in the medical field. This study aimed to apply 3D printing to the production of hollow splenic artery aneurysm models for use in the simulation of endovascular treatment, and to evaluate the precision and accuracy of the simulation model. MATERIALS AND METHODS: From 3D computed tomography (CT) angiography data of a splenic artery aneurysm, 10 hollow models reproducing the vascular lumen were created using a fused deposition modeling-type desktop 3D printer...
January 24, 2017: Academic Radiology
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