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Academic Radiology

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https://www.readbyqxmd.com/read/30660474/mri-diagnosis-for-post-traumatic-osteomyelitis-of-extremities-using-conventional-metal-artifact-reducing-protocols-revisited
#1
Bit Na Park, Suk-Joo Hong, Min A Yoon, Jong-Keon Oh
RATIONALE AND OBJECTIVES: To assess the diagnostic power of MR imaging features for post-traumatic osteomyelitis (PTOM) of the extremities with metal implants using a 3.0-T machine with conventional metal-artifact reducing (MAR) protocols. MATERIALS AND METHODS: Between December 2012 and September 2016, 261 consecutive patients underwent MRI for clinical suspicion of PTOM in the appendicular skeleton at our hospital. A total of 72 enrolled patients with metal implants were divided into two groups, one with surgical, histologic, or microbiologic proven to be PTOM, and the other proven not to be PTOM...
January 16, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30660473/initial-clinical-experience-with-stationary-digital-breast-tomosynthesis
#2
Yueh Z Lee, Connor Puett, Christina R Inscoe, Beilin Jia, Connie Kim, Ruth Walsh, Sora Yoon, Suk Jung Kim, Cherie M Kuzmiak, Donglin Zeng, Jianping Lu, Otto Zhou
RATIONALE AND OBJECTIVES: A linear array of carbon nanotube-enabled x-ray sources allows for stationary digital breast tomosynthesis (sDBT), during which projection views are collected without the need to move the x-ray tube. This work presents our initial clinical experience with a first-generation sDBT device. MATERIALS AND METHODS: Following informed consent, women with a "suspicious abnormality" (Breast Imaging Reporting and Data System 4), discovered by digital mammography and awaiting biopsy, were also imaged by the first generation sDBT...
January 16, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30660472/development-and-validation-of-a-mri-based-radiomics-prognostic-classifier-in-patients-with-primary-glioblastoma-multiforme
#3
Xin Chen, Mengjie Fang, Di Dong, Lingling Liu, Xiangdong Xu, Xinhua Wei, Xinqing Jiang, Lei Qin, Zaiyi Liu
RATIONALE AND OBJECTIVES: Glioblastoma multiforme (GBM) is the most common and deadly type of primary malignant tumor of the central nervous system. Accurate risk stratification is vital for a more personalized approach in GBM management. The purpose of this study is to develop and validate a MRI-based prognostic quantitative radiomics classifier in patients with newly diagnosed GBM and to evaluate whether the classifier allows stratification with improved accuracy over the clinical and qualitative imaging features risk models...
January 16, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30660471/the-effect-of-a-subsequent-pregnancy-after-ovarian-vein-embolization-in-patients-with-infertility-caused-by-pelvic-congestion-syndrome
#4
Juanfang Liu, Liping Han, Xinwei Han
RATIONALE AND OBJECTIVES: To report the effect of pregnancy on patients who have undergone pelvic vein embolization with pelvic congestion syndrome, which was suspected to be the only cause of infertility. MATERIAL AND METHODS: Data from a total of 12 women (mean age: 36.5 ± 4.3 years, range: 29-45 years) were collected between May 2013 and June 2016. Transvenous embolization with fibre platinum coils combined with anhydrous alcohol was performed in unilateral or bilateral ovarian veins after the diagnosis of venous varices confirmed by transvaginal ultrasound or pelvic venography...
January 16, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30660470/the-application-of-a-new-model-based-iterative-reconstruction-in-low-dose-upper-abdominal-ct
#5
Yongjun Jia, Bingying Zhai, Taiping He, Yong Yu, Nan Yu, Haifeng Duan, Chuangbo Yang, Xirong Zhang
RATIONALE AND OBJECTIVES: To compare upper abdominal computed tomography (CT) image quality of new model-based iterative reconstruction (MBIR) with low-contrast resolution preference (MBIRNR40 ), conventional MBIR (MBIRc ), and adaptive statistical iterative reconstruction (ASIR) at low dose with ASIR at routine-dose. MATERIALS AND METHODS: Study included phantom and 60 patients who had initial and follow-up CT scans. For patients, the delay phase was acquired at routine-dose (noise index = 10 HU) for the initial scan and low dose (noise index = 20 HU) for the follow-up...
January 16, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30658931/differentiation-between-multiple-system-atrophy-and-other-spinocerebellar-degenerations-using-diffusion-kurtosis-imaging
#6
Kenji Ito, Chigumi Ohtsuka, Kunihiro Yoshioka, Tetsuya Maeda, Suguru Yokosawa, Futoshi Mori, Tsuyoshi Matsuda, Yasuo Terayama, Makoto Sasaki
RATIONALE AND OBJECTIVE: Differentiation between multiple system atrophy (MSA) and other spinocerebellar degenerations showing cerebellar ataxia is often difficult. Hence, we investigated whether magnetic resonance diffusion kurtosis imaging (DKI) could detect pathological changes that occur in these patients and be used for differential diagnosis. METHODS: Thirty-six subjects (12 patients with MSA accompanied by predominant cerebellar ataxia [MSA-C], 10 patients with spinocerebellar ataxias [SCAs] or sporadic adult-onset ataxia of unknown etiology [SAOA], and 14 healthy controls) were examined using 1...
January 15, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30658930/-structure-function-imaging-of-lung-disease-using-ultrashort-echo-time-mri
#7
Luis Torres, Jeff Kammerman, Andrew D Hahn, Wei Zha, Scott K Nagle, Kevin Johnson, Nathan Sandbo, Keith Meyer, Mark Schiebler, Sean B Fain
RATIONALE AND OBJECTIVES: The purpose of this review is to acquaint the reader with recent advances in ultrashort echo time (UTE) magnetic resonance imaging (MRI) of the lung and its implications for pulmonary MRI when used in conjunction with functional MRI technique. MATERIALS AND METHODS: We provide an overview of recent technical advances of UTE and explore the advantages of combined structure-function pulmonary imaging in the context of restrictive and obstructive pulmonary diseases such as idiopathic pulmonary fibrosis (IPF) and cystic fibrosis (CF)...
January 15, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30658929/impact-of-the-intima-dynamic-motion-in-type-b-acute-aortic-dissection-on-renal-injury-quantificationally-assessed-by-dose-regulated-retrospective-ecg-gated-dual-source-ct-angiography
#8
Shuo Zhao, Hui Gu, Yanhua Duan, Zhaoping Cheng, Baojin Chen, Shifeng Yang, Ximing Wang
BACKGROUND: Little is known about the influence of intima dynamic motion on organ ischemia and related outcomes. The purpose of this study is to quantitatively evaluate intima oscillation by CT angiography (CTA), determine its impact on acute kidney injury (AKI) in patients with type B acute aortic dissection (TB-AAD) before thoracic endovascular aortic repair (TEVAR), and further analyze its association with early adverse events postoperatively. METHODS: Totally, 108 patients with TB-AAD who underwent retrospective ECG-gated CTA and received TEVAR were enrolled...
January 15, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30655053/application-of-adaptive-statistical-iterative-reconstruction-v-with-combination-of-80-kv-for-reducing-radiation-dose-and-improving-image-quality-in-renal-computed-tomography-angiography-for-slim-patients
#9
Zhanli Ren, Xirong Zhang, Zhijun Hu, Dou Li, Zhentang Liu, Donghong Wei, Yongjun Jia, Nan Yu, Yong Yu, Yuxin Lei, Xiaoxia Chen, Changyi Guo, Zhanliang Ren, Taiping He
OBJECTIVES: To explore the application of adaptive statistical iterative reconstruction-V (ASIR-V) with combination of 80 kV for reducing radiation dose and improving image quality in renal computed tomography angiography (CTA) for slim patients compared with traditional filtered back projection (FBP) reconstruction using 120 kV. METHODS: Eighty patients for renal CTA were prospectively enrolled and randomly divided into group A and group B. Group A used 120 kV and 600 mgI/kg contrast agent and FBP reconstruction, while group B used 80 kV and 350 mgI/kg contrast agent and both FBP and ASIR-V reconstruction from 10%ASIR-V to 100%ASIR-V with 10%ASIR-V interval...
January 15, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30655056/foreword-recent-developments-on-imaging-pulmonary-system
#10
EDITORIAL
Rahim R Rizi
No abstract text is available yet for this article.
January 14, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30655055/renal-adiposity-does-not-preclude-quantitative-assessment-of-renal-function-using-dual-energy-multidetector-ct-in-mildly-obese-human-subjects
#11
Christopher M Ferguson, Alfonso Eirin, Gregory J Michalak, Fahim Hedayat, Abdelrhman M Abumoawad, Ahmad F Hedayat, Xiangyang Zhu, Stephen C Textor, Cynthia H McCollough, Lilach O Lerman
RATIONALE AND OBJECTIVES: Multidetector computed tomography (MDCT) is useful for measuring in the research setting single-kidney perfusion and function using iodinated contrast time-attenuation curves. Obesity promotes deposition of intrarenal fat, which might decrease tissue attenuation and thereby interfere with quantification of renal function using MDCT. The purpose of this study was to test the hypothesis that background subtraction adequately accounts for intrarenal fat deposition in mildly obese human subjects during renal contrast enhanced dynamic CT...
January 14, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30655054/shear-wave-elastography-swe-of-asymptomatic-achilles-tendons-a-comparison-between-semiprofessional-athletes-and-the-nonathletic-general-population
#12
Timm Dirrichs, Simone Schrading, Matthias Gatz, Markus Tingart, Christiane K Kuhl, Valentin Quack
RATIONALE AND OBJECTIVES: It has been shown that Shear Wave Elastography (SWE) is a useful tool to evaluate tendon stiffness, e.g. in diagnosing tendinopathies, as diseased or injured tendons are intra-individually softer than healthy ones. But reference values between different population groups are still missing. The purpose of this prospective clinical study was two-fold: First, to comparatively analyse Achilles tendon stiffness between asymptomatic semiprofessional athletes and an asymptomatic nonathletic control group...
January 14, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30655052/diagnostic-accuracy-of-noncontrast-self-navigated-free-breathing-mr-angiography-versus-ct-angiography-a-prospective-study-in-pediatric-patients-with-suspected-anomalous-coronary-arteries
#13
Moritz H Albrecht, Akos Varga-Szemes, U Joseph Schoepf, John W Nance, Carlo N De Cecco, Domenico De Santis, Christian Tesche, Marwen H Eid, Megha Penmetsa, Virginia W Lesslie, Davide Piccini, Markus Goeller, Julian L Wichmann, Thomas J Vogl, Shahryar M Chowdhury, Arni Nutting, Anthony M Hlavacek
RATIONALE AND OBJECTIVES: To evaluate the diagnostic accuracy of a prototype noncontrast, free-breathing, self-navigated 3D (SN3D) MR angiography (MRA) technique for the assessment of coronary artery anatomy in children with known or suspected coronary anomalies, using CT angiography (CTA) as the reference standard. MATERIALS AND METHODS: Twenty-one children (15 male, 12.3 ± 2.6 years) were prospectively enrolled between July 2014 and August 2016 in this IRB-approved, HIPAA-compliant study...
January 14, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30655051/-code-stroke-ct-perfusion-challenges-and-pitfalls
#14
Houman Sotoudeh, Asim K Bag, Michael David Brooks
RATIONALE AND OBJECTIVES: Regarding the most recent ischemic stroke treatment guideline, perfusion imaging has been recommended up to 24 hours after initial symptoms of brain infarction. Patients with a significant amount of salvageable peri-infarct ischemia and no contraindications benefit from delayed thrombolysis and intra-arterial thrombectomy. This approach causes increasingly more CT perfusion to be done in the subacute phase of ischemic stroke. CT perfusion findings in this "subacute phase" are slightly different from "hyper-acute" ischemic stroke...
January 14, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30655050/detection-of-extraprostatic-extension-of-cancer-on-biparametric-mri-combining-texture-analysis-and-machine-learning-preliminary-results
#15
Arnaldo Stanzione, Renato Cuocolo, Sirio Cocozza, Valeria Romeo, Francesco Persico, Ferdinando Fusco, Nicola Longo, Arturo Brunetti, Massimo Imbriaco
RATIONALE AND OBJECTIVES: Extraprostatic extension of disease (EPE) has a major role in risk stratification of prostate cancer patients. Currently, pretreatment local staging is performed with MRI, while the gold standard is represented by histopathological analysis after radical prostatectomy. Texture analysis (TA) is a quantitative postprocessing method for data extraction, while machine learning (ML) employs artificial intelligence algorithms for data classification. Purpose of this study was to assess whether ML algorithms could predict histopathological EPE using TA features extracted from unenhanced MR images...
January 14, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30638976/burnout-in-chairs-of-academic-radiology-departments-in-the-united-states
#16
Dhakshinamoorthy Ganeshan, Wei Wei, Wei Yang
OBJECTIVE: We aimed to estimate the self-reported prevalence of burnout in chairs of academic radiology departments in the United States and identify factors associated with high burnout in chairs. MATERIALS AND METHODS: An anonymous cross-sectional online survey was conducted of members of the Society of Chairs of Academic Radiology Departments. Burnout was measured using the abbreviated Maslach Burnout Inventory Human Services Survey. Associations between survey participants' characteristics and burnout were tested using Fisher's exact test and Wilcoxon rank sum test...
January 10, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30630659/multibreath-hyperpolarized-3-he-imaging-scheme-to-measure-alveolar-oxygen-tension-and-apparent-diffusion-coefficient
#17
Tahmina Achekzai, Hooman Hamedani, Stephen J Kadlecek, Kai Ruppert, Yi Xin, Ryan J Baron, Ian F Duncan, Federico Sertic, Sarmad Siddiqui, Faraz Amzajerdian, Mehrdad Pourfathi, Luis A Loza, Maurizio Cereda, Rahim R Rizi
RATIONALE AND OBJECTIVES: In this study, we compared a newly developed multibreath simultaneous alveolar oxygen tension and apparent diffusion coefficient (PA O2 -ADC) imaging sequence to a single-breath acquisition, with the aim of mitigating the compromising effects of intervoxel flow and slow-filling regions on single-breath measurements, especially in chronic obstructive pulmonary disease (COPD) subjects. MATERIALS AND METHODS: Both single-breath and multibreath simultaneous PA O2 -ADC imaging schemes were performed on a total of 10 human subjects (five asymptomatic smokers and five COPD subjects)...
January 7, 2019: Academic Radiology
https://www.readbyqxmd.com/read/30606615/to-batch-or-not-to-batch-that-is-the-question-screening-tomosynthesis-interpretation-methods
#18
EDITORIAL
Sarah M Friedewald
No abstract text is available yet for this article.
December 31, 2018: Academic Radiology
https://www.readbyqxmd.com/read/30587388/effectiveness-of-endovascular-recanalization-treatment-for-m2-segment-occlusion-comparison-between-intracranial-ica-m1-and-m2-segment-thrombectomy
#19
Juliane Goebel, Elena Stenzel, Isabel Wanke, Daniel Paech, Martin Koehrmann, Christoph Kleinschnitz, Michael Forsting, Alexander Radbruch, Christoph Moenninghoff
RATIONALE AND OBJECTIVES: Mechanical thrombectomy is common practice in proximal anterior vessel occlusion. However, it remains unclear whether peripheral artery occlusions should be treated as well. This retrospective study aimed to prove the effectiveness of endovascular recanalization treatment for the M2 segment by comparison of intracranial internal carotid artery (ICA), M1 segment, and M2 segment thrombectomy. MATERIALS AND METHODS: All patients who received endovascular treatment for distal ICA, M1, or M2 segment occlusions between January 2010 and July 2017 at our center were re-analyzed with respect to reperfusion success, interventional and clinical parameters...
December 24, 2018: Academic Radiology
https://www.readbyqxmd.com/read/30581034/modification-and-reinitiation-of-lower-back-imaging-orders-after-evidence-based-collaborative-consultation
#20
Adam C Powell, Christopher T Lugo, Yan Wang, Gary L Smith, James W Long, Uday U Deshmukh, Jeffrey D Robinson
RATIONALE AND OBJECTIVES: Practice guidelines suggest most patients should wait at least 28 days from the onset of low back pain before receiving imaging. This study evaluates a nondenial prior authorization program's performance in modifying lower back imaging orders. Ordering physicians were asked by a consulting physician to modify any order that did not meet guidelines through collaborative consultation. If original orders were not reinitiated, it could signify that modified orders met clinical objectives...
December 20, 2018: Academic Radiology
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