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Academic Radiology

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https://www.readbyqxmd.com/read/29754996/dce-mri-in-human-gliomas-a-surrogate-for-assessment-of-invasive-hypoxia-marker-hif-1%C3%AE-based-on-mri-neuronavigation-stereotactic-biopsies
#1
Qian Xie, Juan Wu, Zunguo Du, Ningning Di, Ren Yan, Haopeng Pang, Teng Jin, Hua Zhang, Yue Wu, Yong Zhang, Zhenwei Yao, Xiaoyuan Feng
RATIONALE AND OBJECTIVES: The purpose of this study was to correlate dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) parameters with data from a specific marker of hypoxia, hypoxia-inducible factor 1α (HIF-1α), in human gliomas on a point-to-point basis by using coregistered magnetic resonance imaging and frameless stereotactic biopsies. MATERIALS AND METHODS: Thirty-four patients with treatment-naive gliomas underwent DCE, axial T1-weighted, T2-weighted, T2-weighted fluid acquisition of inversion recovery, and three-dimensional T1-weighted brain volume with gadolinium contrast enhancement sequences on a 3...
May 10, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29754995/additive-benefit-of-radiomics-over-size-alone-in-the-distinction-between-benign-lesions-and-luminal-a-cancers-on-a-large-clinical-breast-mri-dataset
#2
Heather M Whitney, Nathan S Taylor, Karen Drukker, Alexandra V Edwards, John Papaioannou, David Schacht, Maryellen L Giger
RATIONALE AND OBJECTIVES: The objective of this study was to demonstrate improvement in distinguishing between benign lesions and luminal A breast cancers in a large clinical breast magnetic resonance imaging database by using quantitative radiomics over maximum linear size alone. MATERIALS AND METHODS: In this retrospective study, 212 benign lesions and 296 luminal A breast cancers were automatically segmented from dynamic contrast-enhanced breast magnetic resonance images...
May 10, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29753491/comparison-of-the-diagnostic-value-of-monoexponential-biexponential-and-stretched-exponential-diffusion-weighted-mri-in-differentiating-tumor-stage-and-histological-grade-of-bladder-cancer
#3
Yanchun Wang, Daoyu Hu, Hao Yu, Yaqi Shen, Hao Tang, Ihab R Kamel, Zhen Li
RATIONALE AND OBJECTIVES: We aimed to determine the utility of various diffusion parameters obtained from monoexponential, biexponential, and stretched exponential diffusion-weighted imaging (DWI) models in differentiating tumor stage and grade of bladder cancer. MATERIALS AND METHODS: Forty-five patients with pathologically confirmed bladder cancer underwent multi-b-value DWI. An apparent diffusion coefficient (ADC) was calculated from DWI by using a monoexponential model...
May 9, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29752156/spectral-ct-imaging-of-lung-cancer-quantitative-analysis-of-spectral-parameters-and-their-correlation-with-tumor-characteristics
#4
Feng Wu, Hang Zhou, Feng Li, Jiang-Tao Wang, Tao Ai
RATIONALE AND OBJECTIVES: Spectral computed tomography (CT) imaging is widely used in the diagnosis of various cancers. This study aimed to analyze the characteristics of lung squamous cell carcinoma (SC) and adenocarcinoma (AC) using spectral CT imaging. METHODS: Sixty patients who were examined via spectral CT imaging and confirmed as having AC or SC via surgery and pathology were enrolled in this research project. A spectrum CT scanner was used, and both plain and enhanced CT scans were conducted to acquire spectral images...
May 8, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29748047/impact-of-immediate-interpretation-of-screening-tomosynthesis-mammography-on-performance-metrics
#5
Nicole S Winkler, Phoebe Freer, Yoshimi Anzai, Nan Hu, Matthew Stein
RATIONALE AND OBJECTIVES: This study aimed to compare performance metrics for immediate and delayed batch interpretation of screening tomosynthesis mammograms. MATERIALS AND METHODS: This HIPAA compliant study was approved by institutional review board with a waiver of consent. A retrospective analysis of screening performance metrics for tomosynthesis mammograms interpreted in 2015 when mammograms were read immediately was compared to historical controls from 2013 to 2014 when mammograms were batch interpreted after the patient had departed...
May 7, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29748046/the-visibility-of-the-terminal-thoracic-duct-into-the-venous-system-using-mr-thoracic-ductography-with-balanced-turbo-field-echo-sequence
#6
Takakiyo Nomura, Tetsu Niwa, Soji Ozawa, Junya Oguma, Shuhei Shibukawa, Yutaka Imai
RATIONALE AND OBJECTIVES: Magnetic resonance thoracic ductography (MRTD) with balanced turbo field echo (bTFE) can visualize both the thoracic duct and its surrounding vessels. This study aimed to investigate the visibility of the terminal thoracic duct into the venous system in the subclavian region using MRTD with bTFE. MATERIALS AND METHODS: MRTD was performed with bTFE as a preoperative workup comprising respiratory gating on a 1.5-T magnetic resonance system for patients with esophageal cancer...
May 7, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29748045/radiology-education-in-medical-school-and-residency-the-views-and-needs-of-program-directors
#7
Patrick T Schiller, Andrew W Phillips, Christopher M Straus
RATIONALE AND OBJECTIVES: The authors of this study used the perspectives of residency program directors (PDs) nationally to explore whether trainees are adequately prepared to utilize and interpret medical imaging as interns, to identify the types of imaging skills most important for residency, and to begin to address current shortcomings in radiology education. MATERIALS AND METHODS: The authors created a survey using a modified version of Accreditation Council for Graduate Medical Education radiology milestones and sent it to 100 randomly selected PDs each in pediatrics, internal medicine, obstetrics and gynecology, and general surgery...
May 7, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29735355/association-of-focal-radiation-dose-adjusted-on-cross-sections-with-subsolid-nodule-visibility-and-quantification-on-computed-tomography-images-using-aidr-3d-comparison-among-scanning-at-84-42-and-7-mas
#8
Yukihiro Nagatani, Hiroshi Moriya, Satoshi Noma, Shigetaka Sato, Shinsuke Tsukagoshi, Tsuneo Yamashiro, Mitsuhiro Koyama, Noriyuki Tomiyama, Yoshiharu Ono, Sadayuki Murayama, Kiyoshi Murata
RATIONALE AND OBJECTIVES: The objectives of this study were to compare the visibility and quantification of subsolid nodules (SSNs) on computed tomography (CT) using adaptive iterative dose reduction using three-dimensional processing between 7 and 42 mAs and to assess the association of size-specific dose estimate (SSDE) with relative measured value change between 7 and 84 mAs (RMVC7-84 ) and relative measured value change between 42 and 84 mAs (RMVC42-84 ). MATERIALS AND METHODS: As a Japanese multicenter research project (Area-detector Computed Tomography for the Investigation of Thoracic Diseases [ACTIve] study), 50 subjects underwent chest CT with 120 kV, 0...
May 4, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29731421/uncited-research-articles-in-popular-united-states-general-radiology-journals
#9
Andrew B Rosenkrantz, Ryan Chung, Richard Duszak
RATIONALE AND OBJECTIVES: This study aimed to characterize articles in popular general radiology journals that go uncited for a decade after publication. METHODS: Using the Web of Science database, we identified annual citation counts for 13,459 articles published in Radiology, American Journal of Roentgenology, and Academic Radiology between 1997 and 2006. From this article cohort, we then identified all original research articles that accrued zero citations within a decade of publication...
May 3, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29731420/performance-of-t2-maps-in-the-detection-of-prostate-cancer
#10
Aritrick Chatterjee, Ajit Devaraj, Melvy Mathew, Teodora Szasz, Tatjana Antic, Gregory S Karczmar, Aytekin Oto
RATIONALE AND OBJECTIVES: This study compares the performance of T2 maps in the detection of prostate cancer (PCa) in comparison to T2-weighted (T2W) magnetic resonance images. MATERIALS AND METHODS: The prospective study was institutional review board approved. Consenting patients (n = 45) with histologic confirmed PCa underwent preoperative 3-T magnetic resonance imaging with or without endorectal coil. Two radiologists, working independently, marked regions of interests (ROIs) on PCa lesions separately on T2W images and T2 maps...
May 3, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29731419/is-there-a-direct-correlation-between-microvascular-wall-structure-and-k-trans-values-obtained-from-perfusion-ct-measurements-in-lymphomas
#11
Marius Horger, Petra Fallier-Becker, Wolfgang M Thaiss, Alexander Sauter, Hans Bösmüller, Manuela Martella, Heike Preibsch, Jan Fritz, Konstantin Nikolaou, Christopher Kloth
RATIONALE AND OBJECTIVES: This study aimed to test the hypothesis that ultrastructural wall abnormalities of lymphoma vessels correlate with perfusion computed tomography (PCT) kinetics. MATERIALS AND METHODS: Our local institutional review board approved this prospective study. Between February 2013 and June 2016, we included 23 consecutive subjects with newly diagnosed lymphoma, who were referred for computed tomography-guided biopsy (6 women, 17 men; mean age, 60...
May 3, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29731418/cultivating-future-radiology-educators-development-and-implementation-of-a-clinician-educator-track-for-residents
#12
Dexter Mendoza, Ryan Peterson, Christopher Ho, Peter Harri, Deborah Baumgarten, Mark E Mullins
Effective and dedicated educators are critical to the preservation and advancement of the practice of radiology. The need for innovative and adaptable educators is increasingly being recognized, with several institutions granting academic promotions through clinician-educator tracks. The implementation of resident "clinician-educator tracks" or "teaching tracks" should better prepare residents aspiring to become academic radiologists focused on teaching. In this work, we describe our experience in the development and implementation of a clinician-educator track for diagnostic radiology residents at our institution...
May 3, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29730148/mri-derived-regional-biventricular-function-in-patients-with-chronic-thromboembolic-pulmonary-hypertension-before-and-after-pulmonary-endarterectomy
#13
Sabine K Maschke, Christian O Schoenfeld, Till F Kaireit, Serghei Cebotari, Karen Olsson, Marius Hoeper, Frank Wacker, Jens Vogel-Claussen
RATIONALE AND OBJECTIVES: The aim of this study was to assess regional myocardial function in patients with chronic thromboembolic hypertension (CTEPH) before and after successful pulmonary endarterectomy (PEA) using magnetic resonance imaging. METHODS: Twenty-two patients with CTEPH underwent cardiac magnetic resonance imaging before and 12 (11, 17) days after PEA. Mean pulmonary artery pressure was evaluated preoperatively by right heart catheterization and during post-PEA intensive care unit-stay using a Swan-Ganz catheter...
May 2, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29724675/the-use-of-model-based-iterative-reconstruction-to-optimize-chest-ct-examinations-for-diagnosing-lung-metastases-in-patients-with-sarcoma-a-phantom-study
#14
Touko Kaasalainen, Teemu Mäkelä, Anna Kelaranta, Mika Kortesniemi
RATIONALE AND OBJECTIVES: This phantom study aimed to evaluate low-dose (LD) chest computed tomography (CT) protocols using model-based iterative reconstruction (MBIR) for diagnosing lung metastases in patients with sarcoma. MATERIALS AND METHODS: An adult female anthropomorphic phantom was scanned with a 64-slice CT using four LD protocols and a standard-dose protocol. Absorbed organ doses were measured with 10 metal-oxide-semiconductor field-effect transistor dosimeters...
April 30, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29724674/chest-x-ray-interpretation-by-radiographers-is-not-inferior-to-radiologists-a-multireader-multicase-comparison-using-jafroc-jack-knife-alternative-free-response-receiver-operating-characteristics-analysis
#15
Nick Woznitza, Keith Piper, Stephen Burke, Graham Bothamley
RATIONALE AND OBJECTIVES: Chest X-rays (CXR) are one of the most frequently requested imaging examinations and are fundamental to many patient pathways. The aim of this study was to investigate the diagnostic accuracy of CXR interpretation by reporting radiographers (technologists). METHODS: A cohort of consultant radiologists (n = 10) and reporting radiographers (technologists; n = 11) interpreted a bank (n = 106) of adult CXRs that contained a range of pathologies...
April 30, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29724673/predictors-of-pain-and-discomfort-associated-with-ct-arthrography-of-the-shoulder
#16
Jianhua Wang, Xiexiang Shao, Mingqian Huang, Hanlong Xin, Zhijie Zhang, Kunzheng Wang
RATIONALE AND OBJECTIVES: The objective of this study was to investigate predictors of pain associated with computed tomographic arthrography of the shoulder. MATERIALS AND METHODS: Before shoulder arthrography, all participants were assessed with the Hospital Anxiety and Depression Scale (HADS) and the World Health Organization Quality of Life Short Version Instrument (WHOQOL-BREF). The participants were nonrandomized into two groups: the anesthesia group, who underwent prior local infiltration anesthesia before shoulder arthrography, and the nonanesthesia group, who did not undergo prior local infiltration anesthesia...
April 30, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29705281/a-multireader-exploratory-evaluation-of-individual-pulse-sequence-cancer-detection-on-prostate-multiparametric-magnetic-resonance-imaging-mri
#17
Sonia Gaur, Stephanie Harmon, Rajan T Gupta, Daniel J Margolis, Nathan Lay, Sherif Mehralivand, Maria J Merino, Bradford J Wood, Peter A Pinto, Joanna H Shih, Peter L Choyke, Baris Turkbey
RATIONALE AND OBJECTIVES: To determine independent contribution of each prostate multiparametric magnetic resonance imaging (mpMRI) sequence to cancer detection when read in isolation. MATERIALS AND METHODS: Prostate mpMRI at 3-Tesla with endorectal coil from 45 patients (n = 30 prostatectomy cases, n = 15 controls with negative magnetic resonance imaging [MRI] or biopsy) were retrospectively interpreted. Sequences (T2-weighted [T2W] MRI, diffusion-weighted imaging [DWI], and dynamic contrast-enhanced [DCE] MRI; N = 135) were separately distributed to three radiologists at different institutions...
April 25, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29705280/comparison-of-t1-mapping-and-t1rho-values-with-conventional-diffusion-weighted-imaging-to-assess-fibrosis-in-a-rat-model-of-unilateral-ureteral-obstruction
#18
Genwen Hu, Wen Liang, Mingxiang Wu, Caiyong Lai, Yingjie Mei, Yufa Li, Jianmin Xu, Liangping Luo, Xianyue Quan
RATIONALE AND OBJECTIVES: The aim of this study was to investigate the potential of magnetic resonance imaging (MRI) T1 mapping and T1 relaxation time in the rotating frame (T1rho) for assessment of renal fibrosis in a rat model of unilateral ureteral obstruction (UUO). MATERIALS AND METHODS: UUO was created in 36 rats. Six rats were scanned at each of the six time points (on days 0, 1, 3, 5, 10, and 15 after UUO). The contralateral kidneys were examined as controls...
April 25, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29699865/color-coded-digital-subtraction-angiography-for-assessing-acute-skeletal-muscle-ischemia-reperfusion-injury-in-a-rabbit-model
#19
Yan Zhang, Chengzhi Li, Hong Zhang, Wanghai Li, Jinwei Li, Xiaobai Wang
RATIONALE AND OBJECTIVES: This paper describes an ongoing investigation of imaging and characterization of ischemia-reperfusion (IR) and investigated the use of color-coded digital subtraction angiography (DSA) to assess reperfusion injury or potential injury. METHODS: New Zealand white rabbits were subjected to right hindlimb ischemia (IR, n = 24) or sham operation (control, n = 6). After 3 hours, the IR rabbits underwent reperfusion and were assessed at 0, 6, 12, or 24 hours (n = 6 each)...
April 23, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29673948/portraits-in-professionalism-when-radiologists-break-the-law
#20
Richard B Gunderman
No abstract text is available yet for this article.
April 16, 2018: Academic Radiology
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