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Academic Radiology

Margarita Braunagel, Florian Ortner, Ulf Schönermarck, Antje Habicht, Andreas Schindler, Manfred Stangl, Frederik F Strobl, Maximilian Reiser, Dirk A Clevert, Christoph Trumm, Andreas Helck
RATIONALE AND OBJECTIVE: The objective of this study was to assess an optimized renal multiphase computed tomography angiography (MP-CTA) protocol regarding reduction of contrast volume. MATERIALS AND METHODS: Thirty patients underwent MP-CTA (12 phases, every 3.5 seconds, 80 kV/120 mAs) using 30 mL of contrast medium. The quality of MP-CTA was assessed quantitatively measuring vessel attenuation, image noise, and contrast-to-noise ratio. MP-CTA was evaluated qualitatively regarding depiction of vessels, cortex differentiation, and motion artifacts (grades 1-4, 1 = best)...
March 12, 2018: Academic Radiology
Mark E Mullins, Arash Anavim, Lori A Deitte, Theresa C McLoud, Charles S Resnik
To the best of our knowledge, there is little available organized advice for diagnostic radiology residency program directors and their programs regarding resident recruitment. We are a group of current and former program directors who are current vice chairs for education and continue to advise and to mentor many educators. We have constructed this article along the yearly schedule of trainee recruitment, including an application review, interviews, and troublesome trends that we have observed.
March 12, 2018: Academic Radiology
Hui-Ting Hsu, En-Kuei Tang, Ming-Ting Wu, Carol C Wu, Chia-Hao Liang, Chi-Shen Chen, Guang-Yuan Mar, Ruay-Sheng Lai, Jo-Ching Wang, Chuan-Ling Wu, Yi-Luan Huang, Fu-Zong Wu
OBJECTIVES: We proposed a modification of the ACR Lung Imaging Reporting and Data System (Lung-RADS) to clarify the characteristics of subsolid nodules with categories 1-11, and to compare the diagnostic accuracy with Lung-RADS and National Lung Screening Trial criteria in an Asian population with high prevalence of adenocarcinoma. METHODS: We analyzed a retrospective cohort of 1978 consecutive healthy subjects (72.8% nonsmoker) who underwent low-dose computed tomography from August 2013 to October 2014 (1084 men, 894 women)...
March 9, 2018: Academic Radiology
Petrice M Cogswell, Lori A Deitte, Edwin F Donnelly, Victoria L Morgan, Reed A Omary
RATIONALE AND OBJECTIVES: The percentage of clinical scientists in radiology has historically been low. Increasing the pipeline of trainees interested in research could occur by recruiting MD-PhD trainees and providing protected research time during residency. The purpose of this work is to assess the attitudes of radiology program directors toward MD-PhD trainees, resident research productivity, and dedicated research time. METHODS: An online survey was sent to residency program directors of all diagnostic radiology departments that received National Institutes of Health (NIH) awards in 2014 (n = 63)...
March 9, 2018: Academic Radiology
Po An Chen, Eric P Huang, Lu Yang Shih, En Kuei Tang, Chu Chun Chien, Ming Ting Wu, Fu Zong Wu
RATIONALE AND OBJECTIVES: The main aim of this study was to evaluate the clinical validity and correlation with pathologic invasiveness in the pulmonary adenocarcinoma spectrum based on the novel qualitative computed tomography criterion for subsolid nodule (SSN) classification, which classified SSN into pure ground-glass nodule, heterogeneous ground-glass nodule, and part-solid nodule. In addition, we compared the performance of the conventional and novel classifications. MATERIALS AND METHODS: The computed tomography images of 41 SSN nodules were interpreted by six observers independently, and the SSN characteristics were classified according to both the conventional and the novel classification systems...
March 9, 2018: Academic Radiology
Wenjuan Ma, Yumei Zhao, Yu Ji, Xinpeng Guo, Xiqi Jian, Peifang Liu, Shandong Wu
RATIONALE AND OBJECTIVES: This study aimed to investigate whether quantitative radiomic features extracted from digital mammogram images are associated with molecular subtypes of breast cancer. MATERIALS AND METHODS: In this institutional review board-approved retrospective study, we collected 331 Chinese women who were diagnosed with invasive breast cancer in 2015. This cohort included 29 triple-negative, 45 human epidermal growth factor receptor 2 (HER2)-enriched, 36 luminal A, and 221 luminal B lesions...
March 8, 2018: Academic Radiology
Bilgin Keserci, Nguyen Minh Duc
RATIONALE AND OBJECTIVES: We aimed to investigate the role of magnetic resonance imaging parameters in predicting the treatment outcome of high-intensity focused ultrasound (HIFU) ablation of uterine fibroids with a nonperfused volume (NPV) ratio of at least 90%. MATERIAL AND METHODS: A total of 120 women who underwent HIFU treatment were divided into groups 1 (n = 72) and 2 (n = 48), comprising patients with an NPV ratio of at least 90% and less than 90%, respectively...
March 7, 2018: Academic Radiology
Sumito Maruyama, Kenzo Muroi, Yoshiyuki Hosokai
RATIONALE AND OBJECTIVES: In general functional magnetic resonance imaging (fMRI) analysis, the task onset time of the statistical model is typically set according to the timing of stimulation. In this study, using a high temporal resolution fMRI data, we examined the way of dynamically visualizing the difference in the activation timing between the brain activation areas by analyzing the task onset time of the statistical model shifted from the actual stimulation timing. MATERIALS AND METHODS: fMRI data with high temporal resolution was acquired using 3 T magnetic resonance imaging for 10 right-handed healthy volunteers...
March 7, 2018: Academic Radiology
Khan H Mohammed, Zhang Wanzhe, Paterson Catherine, Szewczyk-Bieda Magda, Stephen Lang, Nabi Ghulam
RATIONALE AND OBJECTIVES: Prediction of growth, in particular knowing the possibility of aggressive cancer in small renal masses on active surveillance, remains poorly understood. The study was designed to determine whether serial nephrometry score measurements could predict possibility of aggressive malignancy (grade of cancer) in patients with small renal masses opting for active surveillance initially. MATERIALS AND METHODS: One hundred sixteen patients between January 2000 and December 2016 undergoing partial nephrectomy were recruited...
March 6, 2018: Academic Radiology
Wolfgang G Kunz, Maximilian Patzig, Alexander Crispin, Robert Stahl, Maximilian F Reiser, Mike Notohamiprodjo
RATIONALE AND OBJECTIVES: Basal lung opacities are frequently observed on supine chest x-ray (SCXR) of intensive care patients, causing insecurity among clinicians and radiologists. We sought to determine the diagnostic accuracy of SCXR for basal pneumonia. MATERIALS AND METHODS: We identified 172 patients who received both SCXR and computed tomography within 1 hour. Two readers examined the SCXR and rated findings in both basal zones according to the following scale: 0 = "no pneumonia," 1 = "possible pneumonia," 2 = "highly suspected pneumonia...
March 2, 2018: Academic Radiology
Khaled Hammoud, Michael Lanfranchi, Daniel Adams, Harprit S Bedi, William A Mehan
RATIONALE AND OBJECTIVES: Routine head computed tomography (CT) examinations often inadvertently include dental pathology which is often overlooked. The purpose of this study is to examine the prevalence of dental disease incidentally present and detected on head CT examinations, and to determine the effect of the institution of a dental disease field or macro in a standardized head CT dictation template on the rate of reporting dental disease. MATERIALS AND METHODS: Head CT examinations were retrospectively and randomly selected from all examinations performed 6 months before, and 6 months after the institution of a dental disease field in a standardized head CT template...
March 1, 2018: Academic Radiology
Xiaomei Huang, Zixuan Cheng, Yanqi Huang, Cuishan Liang, Lan He, Zelan Ma, Xin Chen, Xiaomei Wu, Yexing Li, Changhong Liang, Zaiyi Liu
RATIONALE AND OBJECTIVES: To develop and validate a computed tomography-based radiomics signature for preoperatively discriminating high-grade from low-grade colorectal adenocarcinoma (CRAC). MATERIALS AND METHODS: This retrospective study was approved by our institutional review board, and the informed consent requirement was waived. This study enrolled 366 patients with CRAC (training dataset: n = 222, validation dataset: n = 144) from January 2008 to August 2015...
March 1, 2018: Academic Radiology
Yuan Zhang, Shiqing Sun, Qi Xu, Weihua Feng, Haisong Chen
RATIONALE AND OBJECTIVES: The posterior inferior cerebellar artery aneurysm (PICAA), especially distal PICAA, is easily missed by a doctor, leading to misdiagnosis and treatment delays. The objective of this article is to report the computed tomography angiography (CTA) presentations of 30 cases of PICAA proved by digital subtraction angiography (DSA) or surgical operation, and analyze the causes of misdiagnosis of PICAA by CTA. MATERIALS AND METHODS: Thirty cases of patients with PICAA that were proved by DSA or surgical operation were included in this study, all of whom underwent CTA before surgical procedure...
March 1, 2018: Academic Radiology
Youichi Machida, Akiko Shimauchi, Hidemi Okuma, Mitsuhiro Tozaki, Sachiko Isobe, Eisuke Fukuma
RATIONALE AND OBJECTIVES: We aimed to investigate the relationship between shear wave speed (SWS) of the lesion on preoperative breast ultrasonography (US) and disease-free survival of patients with primary operable invasive breast cancer. MATERIALS AND METHODS: This retrospective study was approved by our Institutional Review Board. The requirement for informed consent was waived. A total of 195 consecutive newly diagnosed invasive breast cancer patients (age 33-83 years; mean 54...
March 1, 2018: Academic Radiology
Stephan Ellmann, Ferdinand Kammerer, Thomas Allmendinger, Matthias Hammon, Rolf Janka, Michael Lell, Michael Uder, Manuel Kramer
RATIONALE AND OBJECTIVES: This study aimed to determine the potential degree of radiation dose reduction achievable using Advanced Modeled Iterative Reconstruction (ADMIRE) in abdominal computed tomography (CT) while maintaining image quality. Moreover, this study compared differences in image noise reduction of this iterative algorithm with radiation dose reduction. METHODS: Eleven consecutive patients scheduled for abdominal CT were scanned according to our institute's standard protocol (100 kV, 289 reference mAs)...
February 27, 2018: Academic Radiology
Niveditha Pinnamaneni, Linda Moy, Yiming Gao, Amy N Melsaether, James S Babb, Hildegard K Toth, Samantha L Heller
RATIONALE AND OBJECTIVE: The objective of this study was to evaluate breast lesion outcomes in patients after canceled MRI-guided breast biopsy due to lesion nonvisualization. MATERIALS AND METHODS: Electronic medical records (January 2007-December 2014) were searched for patients with canceled magnetic resonance imaging (MRI)-guided breast biopsies due to lesion nonvisualization. A total of 1403 MRI-detected lesions were scheduled for MRI-guided biopsy and 89 were canceled because of nonvisualization...
February 22, 2018: Academic Radiology
Aine Marie Kelly, Patricia B Mullan
Teaching and assessing trainees' professionalism now represents an explicit expectation for Accreditation Council Graduate Medical Education-accredited radiology programs. Challenges to meeting this expectation include variability in defining the construct of professionalism; limits of traditional teaching and assessment methods, used for competencies historically more prominent in medical education, for professionalism; and emerging expectations for credible and feasible professionalism teaching and assessment practices in the current context of health-care training and practice...
February 22, 2018: Academic Radiology
Lian Shanshan, Shi Feng, Wei Kaikai, Zhang Yijun, Liu Huiming, Xie Chuanmiao
RATIONALE AND OBJECTIVES: This study aims to investigate the value of intravoxel incoherent motion (IVIM)-derived parameters for early evaluation of the efficiency of radiofrequency ablation (RFA) treatment for rabbit liver VX2 tumor. MATERIALS AND METHODS: Eighteen rabbit liver VX2 tumor models were constructed, and computed tomography-guided RFA was performed. One day before and 7 days after RFA, 18 models underwent magnetic resonance imaging, including contrast-enhanced imaging and IVIM diffusion-weighted imaging with 16 b-factors (0-1000 s/mm2 )...
February 22, 2018: Academic Radiology
Eduardo J Mortani Barbosa, Maarten Lanclus, Wim Vos, Cedric Van Holsbeke, William De Backer, Jan De Backer, James Lee
RATIONALE AND OBJECTIVES: Long-term survival after lung transplantation (LTx) is limited by bronchiolitis obliterans syndrome (BOS), defined as a sustained decline in forced expiratory volume in the first second (FEV1 ) not explained by other causes. We assessed whether machine learning (ML) utilizing quantitative computed tomography (qCT) metrics can predict eventual development of BOS. MATERIALS AND METHODS: Paired inspiratory-expiratory CT scans of 71 patients who underwent LTx were analyzed retrospectively (BOS [n = 41] versus non-BOS [n = 30]), using at least two different time points...
February 19, 2018: Academic Radiology
Andrea Ferrero, Ralf Gutjahr, Ahmed F Halaweish, Shuai Leng, Cynthia H McCollough
RATIONAL AND OBJECTIVES: This study aims to investigate the performance of a whole-body, photon-counting detector (PCD) computed tomography (CT) system in differentiating urinary stone composition. MATERIALS AND METHODS: Eighty-seven human urinary stones with pure mineral composition were placed in four anthropomorphic water phantoms (35-50 cm lateral dimension) and scanned on a PCD-CT system at 100, 120, and 140 kV. For each phantom size, tube current was selected to match CTDIvol (volume CT dose index) to our clinical practice...
February 14, 2018: Academic Radiology
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