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Academic Radiology

N Reed Dunnick
No abstract text is available yet for this article.
January 6, 2017: Academic Radiology
Ivana Zupetic, Ilyssa J Yousem, Li Liu, Nafi Aygun, David M Yousem
RATIONALE AND OBJECTIVES: We sought to determine (1) whether United States Medical Licensing Examination (USMLE) scores predict academic productivity in neuroradiology fellows as measured by publications and citations, and (2) what factors predict such productivity. MATERIALS AND METHODS: We reviewed the USMLE scores, gender, medical school location attended, publication record before and during fellowship, fellowship evaluation ratings and subsequent practice site (private vs academic) of neuroradiology fellows from 2004 to 2014 to determine relationships with publications and citations after fellowship...
December 29, 2016: Academic Radiology
Leon Lenchik
No abstract text is available yet for this article.
December 29, 2016: Academic Radiology
Fred Nelson, Omaima Bokhari, Daniel Oravec, Woong Kim, Michael Flynn, Catherine Lumley, Austin McPhilamy, Yener N Yeni
RATIONALE AND OBJECTIVES: Subchondral insufficiency fractures (SIF), previously termed spontaneous osteonecrosis of the knee, are marked by a sudden onset of severe pain. Other than the size of the lesion, prediction for progression to joint replacement is difficult. The objective was to determine if quantitative analysis of bone texture using digital tomosynthesis imaging would be useful in predicting more rapid progression to joint replacement. MATERIALS AND METHODS: Tomosynthesis studies of 30 knees with documented SIF were quantified by fractal, mean intercept length (MIL), and line fraction deviation analyses...
December 20, 2016: Academic Radiology
Sebastian Daniel Reinartz, Markus Winkler, Sascha B Diefenbach, Thomas Allmendinger, Tobias Penzkofer, Christiane K Kuhl, Andreas H Mahnken
RATIONALE AND OBJECTIVES: Particularly for patients with heart arrhythmias, conventional BestSystole (BS) and BestDiastole (BD) reconstruction techniques in computed tomography (CT) frequently show artifacts that hinder the readability of the coronary tree. To address this problem, this paper presents an alternative reconstruction method that combines the technique "reconstructions with identical filling" (RIF) with motion mapping: This new technique is called "RIF in motion mapping" (RIMM)...
December 20, 2016: Academic Radiology
Yoshitake Yamada, Masako Ueyama, Takehiko Abe, Tetsuro Araki, Takayuki Abe, Mizuki Nishino, Masahiro Jinzaki, Hiroto Hatabu, Shoji Kudoh
RATIONALE AND OBJECTIVES: Diaphragmatic motion in a standing position during tidal breathing remains unclear. The purpose of this observational study was to evaluate diaphragmatic motion during tidal breathing in a standing position in a health screening center cohort using dynamic chest radiography in association with participants' demographic characteristics. MATERIALS AND METHODS: One hundred seventy-two subjects (103 men; aged 56.3 ± 9.8 years) underwent sequential chest radiographs during tidal breathing using dynamic chest radiography with a flat panel detector system...
December 15, 2016: Academic Radiology
Samuel Y Ash, Rola Harmouche, James C Ross, Alejandro A Diaz, Gary M Hunninghake, Rachel K Putman, Jorge Onieva, Fernando J Martinez, Augustine M Choi, David A Lynch, Hiroto Hatabu, Ivan O Rosas, Raul San Jose Estepar, George R Washko
RATIONALE AND OBJECTIVES: Previous investigation suggests that visually detected interstitial changes in the lung parenchyma of smokers are highly clinically relevant and predict outcomes, including death. Visual subjective analysis to detect these changes is time-consuming, insensitive to subtle changes, and requires training to enhance reproducibility. Objective detection of such changes could provide a method of disease identification without these limitations. The goal of this study was to develop and test a fully automated image processing tool to objectively identify radiographic features associated with interstitial abnormalities in the computed tomography scans of a large cohort of smokers...
December 15, 2016: Academic Radiology
Chamith S Rajapakse, Carter Lindborg, Haitao Wang, Benjamin T Newman, Elizabeth A Kobe, Gregory Chang, Eileen M Shore, Frederick S Kaplan, Robert J Pignolo
RATIONALE AND OBJECTIVES: Severe progressive multifocal heterotopic ossification (HO) is a rare occurrence seen predominantly in patients who have fibrodysplasia ossificans progressiva (FOP) and is difficult to quantitate owing to patient-, disease-, logistical-, and radiation-related issues. The purpose of this study was to develop and validate a scoring system based on plain radiographs for quantitative assessment of HO lesions in patients with FOP. MATERIALS AND METHODS: Institutional review board approval was obtained from the University of Pennsylvania, and all data comply with Health Insurance Portability and Accountability Act regulations...
December 15, 2016: Academic Radiology
Yoshimi Anzai, Marta E Heilbrun, Derek Haas, Luca Boi, Kirk Moshre, Satoshi Minoshima, Robert Kaplan, Vivian S Lee
RATIONALE AND OBJECTIVES: The lack of understanding of the real costs (not charge) of delivering healthcare services poses tremendous challenges in the containment of healthcare costs. In this study, we applied an established cost accounting method, the time-driven activity-based costing (TDABC), to assess the costs of performing an abdomen and pelvis computed tomography (AP CT) in an academic radiology department and identified opportunities for improved efficiency in the delivery of this service...
December 14, 2016: Academic Radiology
Roberta M Strigel, Jennifer Rollenhagen, Elizabeth S Burnside, Mai Elezaby, Amy M Fowler, Frederick Kelcz, Lonie Salkowski, Wendy B DeMartini
RATIONALE AND OBJECTIVES: The BI-RADS Atlas 5th Edition includes screening breast magnetic resonance imaging (MRI) outcome benchmarks. However, the metrics are from expert practices and clinical trials of women with hereditary breast cancer predispositions, and it is unknown if they are appropriate for routine practice. We evaluated screening breast MRI audit outcomes in routine practice across a spectrum of elevated risk patients. MATERIALS AND METHODS: This Institutional Review Board-approved, Health Insurance Portability and Accountability Act-compliant retrospective study included all consecutive screening breast MRI examinations from July 1, 2010 to June 30, 2013...
December 13, 2016: Academic Radiology
Yukihiro Nomura, Toru Higaki, Masayo Fujita, Soichiro Miki, Yoshikazu Awaya, Toshio Nakanishi, Takeharu Yoshikawa, Naoto Hayashi, Kazuo Awai
RATIONALE AND OBJECTIVES: This study aimed to evaluate the effects of iterative reconstruction (IR) algorithms on computer-assisted detection (CAD) software for lung nodules in ultra-low-dose computed tomography (ULD-CT) for lung cancer screening. MATERIALS AND METHODS: We selected 85 subjects who underwent both a low-dose CT (LD-CT) scan and an additional ULD-CT scan in our lung cancer screening program for high-risk populations. The LD-CT scans were reconstructed with filtered back projection (FBP; LD-FBP)...
December 13, 2016: Academic Radiology
Xiao Wu, Ajay Malhotra, Howard P Forman, Diego Nunez, Pina Sanelli
RATIONALE AND OBJECTIVES: Blunt cerebrovascular injury (BCVI) is uncommon, but delayed detection can have disastrous consequences. The Denver criteria are the most commonly used screening criteria. We aim to examine the utilization of screening criteria in the emergency department (ED) of our institution and assess whether patients with risk factors were imaged. MATERIALS AND METHODS: A survey questionnaire was sent out to radiologists in a large academic institution...
December 12, 2016: Academic Radiology
Georg Bier, Mustafa Kurucay, Jörg Henes, Theodoros Xenitidis, Heike Preibsch, Konstantin Nikolaou, Marius Horger
RATIONALE AND OBJECTIVES: To evaluate the role of perfusion CT for monitoring inflammatory activity in patients with aortitis and chronic periaortitis undergoing immunosuppressive therapy. MATERIALS AND METHODS: Seventeen symptomatic patients (median age 68.5 years) who underwent perfusion-based computed tomography (CT) monitoring after diagnostic contrast-enhanced CT were retrospectively included in this study. Blood flow (BF), blood volume (BV), volume transfer constant (k-trans), time to peak, and mean transit time were determined by setting circular regions of interest in prominently thickened parts of the vessel wall or perfused surrounding tissue at sites where the perfusion CT color maps showed a maximum BF value...
December 9, 2016: Academic Radiology
Mingxiang Wu, Jie Ma
RATIONALE AND OBJECTIVE: Breast cancer can be divided into four major molecular subtypes based on the expression of hormone receptor (estrogen receptor and progesterone receptor), human epidermal growth factor receptor 2, HER2 status, and molecular proliferation rate (Ki67). In this study, we sought to investigate the association between breast cancer subtype and radiological findings in the Chinese population. MATERIALS AND METHODS: Medical records of 300 consecutive invasive breast cancer patients were reviewed from the database: the Breast Imaging Reporting and Data System...
December 9, 2016: Academic Radiology
Deqiang Kang, Haiqin Hua, Nan Peng, Jing Zhao, Zhiqun Wang
RATIONALE AND OBJECTIVES: We aim to improve the image quality of coronary computed tomography angiography (CCTA) by using personalized weight and height-dependent scan trigger threshold. MATERIALS AND METHODS: This study was divided into two parts. First, we performed and analyzed the 100 scheduled CCTA data, which were acquired by using body mass index-dependent Smart Prep sequence (trigger threshold ranged from 80 Hu to 250 Hu based on body mass index). By identifying the cases of high quality image, a linear regression equation was established to determine the correlation among the Smart Prep threshold, height, and body weight...
December 9, 2016: Academic Radiology
Eric J Keller, Jeremy D Collins, Cynthia Rigsby, James C Carr, Michael Markl, Susanne Schnell
RATIONALE AND OBJECTIVES: To assess the impact of an alternative preprocessing workflow on noncontrast- and contrast-enhanced abdominal four-dimensional flow magnetic resonance imaging (4D flow MRI) data consistency. MATERIALS AND METHODS: Twenty patients with cirrhosis and portal hypertension (5 women; 53 ± 10 years old) underwent 4D flow MRI at 3.0T before and after administration of 0.03 mmol/kg of gadofosveset trisodium with velocity sensitivities of 100 and 50 cm/s for arterial and venous flow quantifications, respectively...
December 8, 2016: Academic Radiology
George R Washko, Gregory L Kinney, James C Ross, Raúl San José Estépar, MeiLan K Han, Mark T Dransfield, Victor Kim, Hiroto Hatabu, Carolyn E Come, Russell P Bowler, Edwin K Silverman, James Crapo, David A Lynch, John Hokanson, Alejandro A Diaz
RATIONALE AND OBJECTIVE: Emphysema is characterized by airspace dilation, inflammation, and irregular deposition of elastin and collagen in the interstitium. Computed tomographic studies have reported that lung mass (LM) may be increased in smokers, a finding attributed to inflammatory and parenchymal remodeling processes observed on histopathology. We sought to examine the epidemiologic and clinical associations of LM in smokers. MATERIALS AND METHODS: Baseline epidemiologic, clinical, and computed tomography (CT) data (n = 8156) from smokers enrolled into the COPDGene Study were analyzed...
December 8, 2016: Academic Radiology
Tariq Ali, Miltiadis E Krokidis, Andrew Winterbottom
Peripheral non-atherosclerotic arterial disorders (NAADs) are a heterogeneous group of rather uncommon conditions that tend to manifest in subjects without atherosclerosis. Each of these conditions has distinctive pathophysiology; however, there are some common clinical and radiological characteristics and in some cases a common treatment approach that unifies these conditions to a specific group, hence the NAADs. Clinicians and radiologists often fail to recognize NAADs, and there might be a delay in the management of such patients; this may result in seriously adverse outcomes that could otherwise have been avoided or minimized...
December 8, 2016: Academic Radiology
Xiaowei Han, Junfeng Li, Xiaoyi Wang
RATIONALE AND OBJECTIVES: Breast 3.0 T magnetic resonance diffusion-weighted imaging (MR-DWI) of benign and malignant lesions were obtained to measure and calculate the signal-to-noise ratio (SNR), signal intensity ratio (SIR), and contrast-to-noise ratio (CNR) of lesions at different b-values. The variation patterns of SNR and SIR were analyzed with different b-values and the images of DWI were compared at four different b-values with higher image quality. The effect of SIR on the differential diagnostic efficiency of benign and malignant lesions was compared using receiver operating characteristic curves to provide a reference for selecting the optimal b-value...
December 7, 2016: Academic Radiology
Sona A Chikarmane, Ryan Tai, Jack E Meyer, Catherine S Giess
RATIONALE AND OBJECTIVES: This study aims to determine the prevalence and predictive value of Breast Imaging Reporting and Data System (BI-RADS) 3, 4, and 5 findings on breast magnetic resonance imaging (MRI) and to evaluate the impact of study indication on the predictive value of BI-RADS categories. MATERIALS AND METHODS: This institutional review board approved, Health Insurance Portability and Accountability Act (HIPAA) compliant retrospective review of our breast MRI database from 2009 to 2011, of 5778 contrast-enhanced studies in 3360 patients was performed...
December 7, 2016: Academic Radiology
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