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AJR. American Journal of Roentgenology

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https://read.qxmd.com/read/30860902/mri-guided-cryoablation-of-hepatic-dome-hepatocellular-carcinomas-using-1-t-open-high-field-strength-scanner
#1
Ligang Wang, Chao Liu, Jiantao Liu, Peipei Li, Jianfeng Xiang, Ming Liu, Chengli Li
OBJECTIVE: The objective of our study was to prospectively evaluate the feasibility, safety, and effectiveness of 1-T open MRI-guided percutaneous cryoablation of hepatic dome hepatocellular carcinomas (HCCs). SUBJECTS AND METHODS: Thirty-seven patients with 37 hepatic dome HCCs underwent MRI-guided percutaneous cryoablations. MR fluoroscopy with a freehand technique was applied in the procedure. All lesions ranged in size from 8 to 38 mm. Patients were followed for at least 12 months after cryoablation or until death...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860901/accuracy-of-distinguishing-atypical-ductal-hyperplasia-from-ductal-carcinoma-in-situ-with-convolutional-neural-network-based-machine-learning-approach-using-mammographic-image-data
#2
Richard Ha, Simukayi Mutasa, Eduardo Pascual Van Sant, Jenika Karcich, Christine Chin, Michael Z Liu, Sachin Jambawalikar
OBJECTIVE: The purpose of this study was to test the hypothesis that convolutional neural networks can be used to predict which patients with pure atypical ductal hyperplasia (ADH) may be safely monitored rather than undergo surgery. MATERIALS AND METHODS: A total of 298 unique images from 149 patients were used for our convolutional neural network algorithm. A total of 134 images from 67 patients with ADH that had been diagnosed by stereotactic-guided biopsy of calcifications but had not been upgraded to ductal carcinoma in situ or invasive cancer at the time of surgical excision...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860900/medical-students-and-family-physicians-attitudes-and-perceptions-toward-radiology-learning-in-the-second-life-virtual-world
#3
Rocio Lorenzo-Alvarez, Miguel J Ruiz-Gomez, Francisco Sendra-Portero
OBJECTIVE: The purpose of this study was to evaluate 3rd-year medical students' attitudes and perceptions toward a radiographic interpretation course inside the virtual world Second Life during their formal training in radiology and to compare their attitudes and perceptions with those of family physicians exposed to the same course. SUBJECTS AND METHODS: Forty-eight 3rd-year medical students voluntarily participated in a 3-week course held in Second Life during a 4-month course on general radiology...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860899/paraspinal-lean-muscle-mass-measurement-using-spine-mri-as-a-predictor-of-adjacent-segment-disease-after-lumbar-fusion-a-propensity-score-matched-case-control-analysis
#4
Min-Yung Chang, Yung Park, Joong Won Ha, Ho-Yeol Zhang, Sang Hoon Lee, Taek-Ho Hong, Seung Hyun Lee
OBJECTIVE: The purpose of this study was to compare paraspinal muscle mass between patients with and without adjacent segment disease (ASD) after lumbar fusion. MATERIALS AND METHODS: Fifty patients with ASD (mean age, 61.4 years; ratio of male to female patients: 13:37; mean body mass index [BMI; weight in kilograms divided by the square of height in meters], 25.1) were matched to 50 control patients on the basis of age, sex, BMI, and fusion segment. The total cross-sectional area (CSA) and functional CSA (FCSA; i...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860898/effectiveness-of-high-speed-t2-corrected-multiecho-mr-spectroscopic-method-for-quantifying-thigh-muscle-fat-content-in-boys-with-duchenne-muscular-dystrophy
#5
Zhiyong Li, Hongwu Zeng, Chunxi Han, Longwei Sun, Diangang Fang, Hongkui Yu, Xianyue Quan
OBJECTIVE: The purpose of this study was to investigate the potential of high-speed T2-corrected multiecho (HISTO) MR spectroscopy (MRS) for rapidly quantifying the fat content of thigh muscles in children with Duchenne muscular dystrophy (DMD). SUBJECTS AND METHODS: This study prospectively enrolled 58 boys with DMD (mean age, 7.5 years; range, 4-11 years) and 30 age-matched healthy boys (mean age, 7.2 years; range, 4-11 years) at one institution over a 1-year period...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860897/image-quality-of-iodine-maps-for-pulmonary-embolism-a-comparison-of-subtraction-ct-and-dual-energy-ct
#6
Dagmar Grob, Ewoud Smit, Luuk J Oostveen, Miranda M Snoeren, Mathias Prokop, Cornelia M Schaefer-Prokop, Ioannis Sechopoulos, Monique Brink
OBJECTIVE: The objective of this study was to compare the image quality of iodine maps derived from subtraction CT and from dual-energy CT (DECT) in patients with suspected pulmonary embolism (PE). SUBJECTS AND METHODS: In this prospective study conducted between July 2016 and April 2017, consecutive patients with suspected PE underwent unenhanced CT at 100 kV and dual-energy pulmonary CT angiography at 100 and 140 kV on a dual-source scanner. The scanner was set to generate subtraction and DECT iodine maps at similar radiation doses...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860896/autonomic-dysreflexia-in-patients-with-spinal-cord-injury-what-the-radiologist-needs-to-know
#7
Timothy E Murray, Andrei V Krassioukov, Emily H T Pang, Charles V Zwirewich, Silvia D Chang
OBJECTIVE: Autonomic dysreflexia (AD) is a potentially life-threatening condition that occurs in patients with cervical and high thoracic spinal cord injury (SCI). AD is not completely understood and has a high incidence that increases proportional to the level and severity of the SCI. The signs and symptoms can vary, but severe hypertension is a dominant feature and may be fatal. This condition can be precipitated by a wide range of triggers occurring below the level of the injury, several of which are common to both diagnostic and interventional radiology, such as manipulation or distention of the genitourinary or gastrointestinal tract, patient positioning, or the use of certain anesthetic techniques...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860895/automated-tracking-of-follow-up-imaging-recommendations
#8
Thusitha Mabotuwana, Christopher S Hall, Vadiraj Hombal, Prashanth Pai, Usha Nandini Raghavan, Shawn Regis, Brady McKee, Sandeep Dalal, Christoph Wald, Martin L Gunn
OBJECTIVE: Radiology reports often contain follow-up imaging recommendations. Failure to comply with these recommendations in a timely manner can lead to poor patient outcomes, complications, and legal liability. As such, the primary objective of this research was to determine adherence rates to follow-up recommendations. MATERIALS AND METHODS: Radiology-related examination data, including report text, for examinations performed between June 1, 2015, and July 31, 2017, were extracted from the radiology departments at the University of Washington (UW) and Lahey Hospital and Medical Center (LHMC)...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860894/role-of-whole-body-18-f-fdg-pet-ct-in-screening-for-metastases-in-newly-diagnosed-sinonasal-malignancies
#9
Kerem Ozturk, Mehmet Gencturk, Matthew Rischall, Emiro Caicedo-Granados, Faqian Li, Zuzan Cayci
OBJECTIVE: The aim of this study is to assess the utility of pretreatment whole-body 18 F-FDG PET/CT in screening for distant metastasis (DM) and regional lymphatic metastasis (LM). MATERIALS AND METHODS: Eighty-nine consecutive patients with untreated sinonasal malignant lesions (32 women and 57 men; mean age, 62 years) underwent whole-body FDG PET/CT between January 2009 and August 2017. A retrospective analysis was performed to determine the presence of DM and LM...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860893/catalase-containing-silica-particles-as-ultrasound-based-hydrogen-peroxide-sensors-to-determine-infected-from-noninfected-fluid-collections-in-humans
#10
Christopher D Malone, David T Fetzer, Jacques Lux, Robert F Mattrey
OBJECTIVE: Hydrogen peroxide (H2 O2 ) plays a key role in neutrophil oxidative defense against infection. Catalase-containing silica nanoshells are nanoparticles that generate O2 microbubbles imaged with ultrasound in the presence of elevated H2 O2 . We aimed to determine whether ultrasound-detectable O2 microbubbles produced by catalase-containing silica nanoshells can determine whether fluid collections drained from patients are infected. SUBJECTS AND METHODS: During this HIPAA-compliant, institutional review board-approved study, 52 human fluid samples were collected from clinically required image-guided percutaneous drainage procedures...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860892/impact-of-radiology-report-wording-on-care-of-patients-with-acute-epiploic-appendagitis
#11
Renata R Almeida, Ajay K Singh, Mohammad Mansouri, Gabriela Spilberg, Tarik Alkasab, Michael H Lev
OBJECTIVE: The purpose of this study was to evaluate the association between the diagnostic certainty expressed by the wording of CT report impressions and subsequent use of standard treatment with analgesics versus nonstandard antibiotic administration in patients with acute epiploic appendagitis (EA). MATERIALS AND METHODS: Demographic, clinical, and radiologic data from a 10-year cohort of patients with acute EA were retrospectively analyzed and correlated with standard treatment with analgesics versus nonstandard treatment with antibiotics...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860891/active-surveillance-of-small-4-cm-bosniak-category-2f-3-and-4-renal-lesions-what-happens-on-imaging-follow-up
#12
Hiram Shaish, Firas Ahmed, Jessica Schreiber, Nicole M Hindman
OBJECTIVE: The purpose of this study was to determine the percentage of small (< 4 cm) Bosniak category 2F, 3, and 4 lesions that regress during active surveillance. MATERIALS AND METHODS: In this retrospective study, a hospital database was searched from January 1, 2005, through September 9, 2017, for small (< 4 cm) Bosniak category 2F, 3, and 4 lesions studied with initial and follow-up unenhanced and contrast-enhanced CT or MRI. Prospective Bosniak categories were recorded...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860890/added-value-from-abbreviated-brain-mri-in-children-with-headache
#13
Anna Trofimova, Nadja Kadom
OBJECTIVE: The purposes of this article are to describe implementation of an abbreviated brain MRI protocol for use in children with primary headache and to present an experience with the adaptation of the protocol in practice, work flow integration, and effects on sedation use. CONCLUSION: The abbreviated brain MRI protocol reduced the need for sedation for 74% of the study sample. Use of this protocol in this particular patient population continues, but further validation is required before its use is expanded to other pediatric populations...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860889/value-of-high-resolution-dwi-in-combination-with-texture-analysis-for-the-evaluation-of-tumor-response-after-preoperative-chemoradiotherapy-for-locally-advanced-rectal-cancer
#14
Lanqing Yang, Meng Qiu, Chunchao Xia, Zhenlin Li, Ziqiang Wang, Xiaoyue Zhou, Bing Wu
OBJECTIVE: The purpose of this study is to determine the performance of the apparent diffusion coefficient (ADC) value calculated from high-resolution DWI using readout-segmented echo-planar imaging (rs-EPI) and to assess the texture parameters of T2-weighted MR images in identifying pathologic complete response (pCR) after patients with locally advanced rectal cancer (LARC) undergo preoperative chemoradiotherapy (CRT). MATERIALS AND METHODS: A total of 76 patients with LARC who underwent preoperative CRT and subsequent surgery were enrolled in the study retrospectively...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860888/value-of-relative-myocardial-perfusion-at-mri-for-fractional-flow-reserve-defined-ischemia-a-pilot-study
#15
Olivier Ghekiere, Jean-Nicolas Dacher, Willem Dewilde, Isabelle Mancini, Wilfried Cools, Piet K Vanhoenacker, Paul Dendale, Patrizio Lancellotti, Albert de Roos, Alain Nchimi
OBJECTIVE: Correcting the perfusion in areas distal to coronary stenosis (risk) according to that of normal (remote) areas defines the relative myocardial perfusion index, which is similar to the fractional flow reserve (FFR) concept. The aim of this study was to assess the value of relative myocardial perfusion by MRI in predicting lesion-specific inducible ischemia as defined by FFR. MATERIALS AND METHODS: Forty-six patients (33 men and 13 women; mean [± SD] age, 61 ± 9 years) who underwent adenosine perfusion MRI and FFR measurement distal to 49 coronary artery stenoses during coronary angiography were retrospectively evaluated...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860887/compliance-with-skeletal-surveys-for-child-abuse-in-general-hospitals-a-statewide-quality-improvement-process
#16
Matthew R Wanner, Megan B Marine, Roberta A Hibbard, Fangqian Ouyang, S Gregory Jennings, Lindsey Shea, Boaz Karmazyn
OBJECTIVE: The purpose of this study is to perform a statewide quality improvement process to improve compliance with the American College of Radiology (ACR) guidelines in performing skeletal surveys for suspected child abuse. SUBJECTS AND METHODS: We prospectively identified all outside hospital skeletal surveys for suspected child abuse in children younger than 3 years referred to our tertiary children's hospital in 2016-2017. We included a 3-month baseline and 21-month intervention period...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860886/bilirubin-correlation-may-preclude-mrcp-in-acute-cholecystitis-patients-with-normal-common-bile-duct-diameter
#17
Jesse E Chen, Ajla Kadribegic, David Sarkany
OBJECTIVE: In patients with acute cholecystitis (AC), accurate identification of a common bile duct (CBD) stone before cholecystectomy is of concern for surgeons, gastroenterologists, and radiologists. This study evaluates the utility of preoperative MRCP taking into consideration both sonographic findings and biochemical predictors for choledocholithiasis. MATERIALS AND METHODS: Fifty-seven patients (58% women; mean age, 54 years old) with signs of AC on right upper quadrant (RUQ) ultrasound (US) who underwent subsequent MRCP from 2007 to 2017 were identified using a text-based search and retrospectively analyzed, using ERCP as the reference standard...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860885/use-of-quantitative-t2-weighted-and-apparent-diffusion-coefficient-texture-features-of-bladder-cancer-and-extravesical-fat-for-local-tumor-staging-after-transurethral-resection
#18
Christopher S Lim, Sree Tirumani, Christian B van der Pol, Francesco Alessandrino, Guru P Sonpavde, Stuart G Silverman, Atul B Shinagare
OBJECTIVE: The purpose of this study was to determine whether quantitative T2-weighted imaging and apparent diffusion coefficient (ADC) texture features of bladder cancer and extravesical fat are predictive of muscle invasive bladder cancer (category ≥ T2) and extravesical (category ≥ T3) disease after transurethral resection of a bladder tumor (TURBT). MATERIALS AND METHODS: In this retrospective study, 36 patients (27 men, nine women; mean age, 71 years) were identified who underwent post-TURBT MRI followed by cystectomy without intervening treatment from August 2011 through October 2016...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30860884/diagnostic-accuracy-of-mri-based-sacroiliitis-scoring-systems-a-systematic-review
#19
Vimarsha G Swami, Jacob L Jaremko, Dax G Rumsey, Jennifer Stimec, Shirley M L Tse, Tarimobo M Otobo, Thomasin Adams-Webber, Andrea S Doria
OBJECTIVE: Accurate and reproducible MRI assessment of the sacroiliac joint (SIJ) is challenging. Numerous scoring systems have been proposed to facilitate consistent SIJ assessment. The purpose of this article is to evaluate the diagnostic accuracy and reliability of existing MRI-based SIJ scoring systems for the evaluation of spondyloarthropathy. CONCLUSION: Among existing methods, there is fair (grade B) evidence to recommend the Spondyloarthropathy Research Consortium of Canada scoring systems as tools for MRI evaluation of the SIJ...
March 12, 2019: AJR. American Journal of Roentgenology
https://read.qxmd.com/read/30835523/comparison-of-positive-oral-contrast-agents-for-abdominopelvic-ct
#20
Sebastian Winklhofer, Wei-Ching Lin, Zhen Jane Wang, Spencer C Behr, Antonio C Westphalen, Benjamin M Yeh
OBJECTIVE: The objective of our study was to compare the quality of bowel opacification from three different positive oral contrast agents-barium sulfate, diatrizoate, and iohexol-at abdominopelvic CT. MATERIALS AND METHODS: Abdominopelvic CT examinations with three different oral contrast agents (each contrast agent: n = 300 patients) of 900 patients were retrospectively evaluated by two independent readers. For four segments of the gastrointestinal tract (i.e...
March 5, 2019: AJR. American Journal of Roentgenology
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