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https://www.readbyqxmd.com/read/29206596/value-of-a-computer-aided-detection-system-based-on-chest-tomosynthesis-imaging-for-the-detection-of-pulmonary-nodules
#1
Yoshitake Yamada, Eisuke Shiomi, Masahiro Hashimoto, Takayuki Abe, Masaki Matsusako, Yukihisa Saida, Kenji Ogawa
Purpose To assess the value of a computer-aided detection (CAD) system for the detection of pulmonary nodules on chest tomosynthesis images. Materials and Methods Fifty patients with and 50 without pulmonary nodules underwent both chest tomosynthesis and multidetector computed tomography (CT) on the same day. Fifteen observers (five interns and residents, five chest radiologists, and five abdominal radiologists) independently evaluated tomosynthesis images of 100 patients for the presence of pulmonary nodules in a blinded and randomized manner, first without CAD, then with the inclusion of CAD marks...
December 4, 2017: Radiology
https://www.readbyqxmd.com/read/29206595/assessment-of-response-to-transcatheter-arterial-chemoembolization-with-doxorubicin-eluting-microspheres-tumor-biology-and-hepatocellular-carcinoma-recurrence-in-a-5-year-transplant-cohort
#2
Tyler A Sandow, Stephen E Arndt, Abeer A Albar, Daniel A DeVun, David S Kirsch, Juan M Gimenez, Humberto E Bohorquez, Patrick J Gilbert, Paul T Thevenot, Kelley G Nunez, Gretchen A Galliano, Ari J Cohen, Dennis Kay, Paul M Gulotta
Purpose To assess response to transcatheter arterial chemoembolization (TACE) based on immune markers and tumor biology in patients with hepatocellular carcinoma (HCC) who were bridged to liver transplantation, and to produce an optimized pretransplantation model for posttransplantation recurrence risk. Materials and Methods In this institutional review board-approved HIPAA-compliant retrospective analysis, 93 consecutive patients (73 male, 20 female; mean age, 59.6 years; age range, 23-72 years) underwent TACE with doxorubicin-eluting microspheres (DEB) (hereafter, DEB-TACE) and subsequently underwent transplantation over a 5-year period from July 7, 2011, to May 16, 2016...
December 4, 2017: Radiology
https://www.readbyqxmd.com/read/29206594/the-diagnostic-value-of-mr-imaging-in-differentiating-t-staging-of-bladder-cancer-a-meta-analysis
#3
Li Huang, Qingcong Kong, Zhenzhen Liu, Jin Wang, Zhuang Kang, Yeqing Zhu
Purpose To assess the diagnostic accuracy of magnetic resonance (MR) imaging for differentiating stage T1 or lower tumors from stage T2 or higher tumors and to analyze the influence of different imaging protocols in patients with bladder cancer. Materials and Methods A systematic literature search for original diagnostic studies was performed in PubMed, Medline, the Cochrane Library, and Web of Science. The methodologic quality of each study was evaluated by two independent reviewers who used the Quality Assessment of Diagnostic Accuracy Studies 2 tool...
December 4, 2017: Radiology
https://www.readbyqxmd.com/read/29206593/glioma-grade-discrimination-with-mr-diffusion-kurtosis-imaging-a-meta-analysis-of-diagnostic-accuracy
#4
Anna Falk Delgado, Markus Nilsson, Danielle van Westen, Alberto Falk Delgado
Purpose To assess the diagnostic test accuracy and sources of heterogeneity for the discriminative potential of diffusion kurtosis imaging (DKI) to differentiate low-grade glioma (LGG) (World Health Organization [WHO] grade II) from high-grade glioma (HGG) (WHO grade III or IV). Materials and Methods The Cochrane Library, Embase, Medline, and the Web of Science Core Collection were systematically searched by two librarians. Retrieved hits were screened for inclusion and were evaluated with the revised tool for quality assessment for diagnostic accuracy studies (commonly known as QUADAS-2) by two researchers...
December 4, 2017: Radiology
https://www.readbyqxmd.com/read/29189102/changes-in-signal-intensity-of-the-dentate-nucleus-and-globus-pallidus-in-pediatric-patients-impact-of-brain-irradiation-and-presence-of-primary-brain-tumors-independent-of-linear-gadolinium-based-contrast-agent-administration
#5
Benita Tamrazi, Binh Nguyen, Chia-Shang J Liu, Colleen G Azen, Mary B Nelson, Girish Dhall, Marvin D Nelson
Purpose To determine whether whole-brain irradiation, chemotherapy, and primary brain pathologic conditions affect magnetic resonance (MR) imaging signal changes in pediatric patients independent of the administration of gadolinium-based contrast agents (GBCAs). Materials and Methods This institutional review board-approved, HIPAA-compliant study included 144 pediatric patients who underwent intravenous GBCA-enhanced MR imaging examinations (55 patients with primary brain tumors and whole-brain irradiation, 19 with primary brain tumors and chemotherapy only, 52 with primary brain tumors without any treatment, and 18 with neuroblastoma without brain metastatic disease)...
November 30, 2017: Radiology
https://www.readbyqxmd.com/read/29185902/intermanufacturer-comparison-of-dual-energy-ct-iodine-quantification-and-monochromatic-attenuation-a-phantom-study
#6
Megan C Jacobsen, Dawid Schellingerhout, Cayla A Wood, Eric P Tamm, Myrna C Godoy, Jia Sun, Dianna D Cody
Purpose To determine the accuracy of dual-energy computed tomographic (CT) quantitation in a phantom system comparing fast kilovolt peak-switching, dual-source, split-filter, sequential-scanning, and dual-layer detector systems. Materials and Methods A large elliptical phantom containing iodine (2, 5, and 15 mg/mL), simulated contrast material-enhanced blood, and soft-tissue inserts with known elemental compositions was scanned three to five times with seven dual-energy CT systems and a total of 10 kilovolt peak settings...
November 29, 2017: Radiology
https://www.readbyqxmd.com/read/29185901/identification-of-distant-metastatic-disease-in-uterine-cervical-and-endometrial-cancers-with-fdg-pet-ct-analysis-from-the-acrin-6671-gog-0233-multicenter-trial
#7
Michael S Gee, Mostafa Atri, Andriy I Bandos, Robert S Mannel, Michael A Gold, Susanna I Lee
Purpose To assess the accuracy of staging positron emission tomography (PET)/computed tomography (CT) in detecting distant metastasis in patients with local-regionally advanced cervical and high-risk endometrial cancer in the clinical trial by the American College of Radiology Imaging Network (ACRIN) and the Gynecology Oncology Group (GOG) (ACRIN 6671/GOG 0233) and to compare central and institutional reader performance. Materials and Methods In this prospective multicenter trial, PET/CT and clinical data were reviewed for patients enrolled in ACRIN 6671/GOG 0233...
November 29, 2017: Radiology
https://www.readbyqxmd.com/read/29173123/screening-digital-mammography-recall-rate-does-it-change-with-digital-breast-tomosynthesis-experience
#8
Olivia DiPrete, Ana P Lourenco, Grayson L Baird, Martha B Mainiero
Purpose To compare screening mammography recall rate, cancer detection rate (CDR), and positive predictive values (PPVs) for digital mammography before and after radiologist experience with digital breast tomosynthesis (DBT). Materials and Methods This retrospective study was approved by the institutional review board and compliant with HIPAA. The authors reviewed screening mammography audit data obtained from 2009 to 2014, during which 108 276 digital mammographic examinations were performed (50 062 before and 58 214 after experience with DBT)...
November 28, 2017: Radiology
https://www.readbyqxmd.com/read/29173122/are-study-and-journal-characteristics-reliable-indicators-of-truth-in-imaging-research
#9
Robert A Frank, Matthew D F McInnes, Deborah Levine, Herbert Y Kressel, Julia S Jesurum, William Petrcich, Trevor A McGrath, Patrick M Bossuyt
Purpose To evaluate whether journal-level variables (impact factor, cited half-life, and Standards for Reporting of Diagnostic Accuracy Studies [STARD] endorsement) and study-level variables (citation rate, timing of publication, and order of publication) are associated with the distance between primary study results and summary estimates from meta-analyses. Materials and Methods MEDLINE was searched for meta-analyses of imaging diagnostic accuracy studies, published from January 2005 to April 2016. Data on journal-level and primary-study variables were extracted for each meta-analysis...
November 28, 2017: Radiology
https://www.readbyqxmd.com/read/29178816/a-pivotal-study-of-optoacoustic-imaging-to-diagnose-benign-and-malignant-breast-masses-a-new-evaluation-tool-for-radiologists
#10
Erin I Neuschler, Reni Butler, Catherine A Young, Lora D Barke, Margaret L Bertrand, Marcela Böhm-Vélez, Stamatia Destounis, Pamela Donlan, Stephen R Grobmyer, Janine Katzen, Kenneth A Kist, Philip T Lavin, Erini V Makariou, Tchaiko M Parris, Kathy J Schilling, F Lee Tucker, Basak E Dogan
Purpose To compare the diagnostic utility of an investigational optoacoustic imaging device that fuses laser optical imaging (OA) with grayscale ultrasonography (US) to grayscale US alone in differentiating benign and malignant breast masses. Materials and Methods This prospective, 16-site study of 2105 women (study period: 12/21/2012 to 9/9/2015) compared Breast Imaging Reporting and Data System (BI-RADS) categories assigned by seven blinded independent readers to benign and malignant breast masses using OA/US versus US alone...
November 27, 2017: Radiology
https://www.readbyqxmd.com/read/29178815/central-core-laboratory-versus-site-interpretation-of-coronary-ct-angiography-agreement-and-association-with-cardiovascular-events-in-the-promise-trial
#11
Michael T Lu, Nandini M Meyersohn, Thomas Mayrhofer, Daniel O Bittner, Hamed Emami, Stefan B Puchner, Borek Foldyna, Martin E Mueller, Steven Hearne, Clifford Yang, Stephan Achenbach, Quynh A Truong, Brian B Ghoshhajra, Manesh R Patel, Maros Ferencik, Pamela S Douglas, Udo Hoffmann
Purpose To assess concordance and relative prognostic utility between central core laboratory and local site interpretation for significant coronary artery disease (CAD) and cardiovascular events. Materials and Methods In the Prospective Multicenter Imaging Study for Evaluation of Chest Pain (PROMISE) trial, readers at 193 North American sites interpreted coronary computed tomographic (CT) angiography as part of the clinical evaluation of stable chest pain. Readers at a central core laboratory also interpreted CT angiography blinded to clinical data, site interpretation, and outcomes...
November 27, 2017: Radiology
https://www.readbyqxmd.com/read/29173071/systematic-review-and-meta-analysis-of-ct-features-for-differentiating-complicated-and-uncomplicated-appendicitis
#12
Hae Young Kim, Ji Hoon Park, Yoon Jin Lee, Sung Soo Lee, Jong-June Jeon, Kyoung Ho Lee
Purpose To perform a systematic review and meta-analysis to identify computed tomographic (CT) features for differentiating complicated appendicitis in patients suspected of having appendicitis and to summarize their diagnostic accuracy. Materials and Methods Studies on diagnostic accuracy of CT features for differentiating complicated appendicitis (perforated or gangrenous appendicitis) in patients suspected of having appendicitis were searched in Ovid-MEDLINE, EMBASE, and the Cochrane Library. Overlapping descriptors used in different studies to denote the same image finding were subsumed under a single CT feature...
November 27, 2017: Radiology
https://www.readbyqxmd.com/read/29173070/generalist-versus-subspecialist-characteristics-of-the-u-s-radiologist-workforce
#13
Andrew B Rosenkrantz, Wenyi Wang, Danny R Hughes, Richard Duszak
Purpose To assess subspecialty practice characteristics of the U.S. radiologist workforce. Materials and Methods This study used the Medicare Physician and Other Supplier Public Use File and did not constitute human subject research. The authors identified 33 090 radiologists who billed for professional services between 2012 and 2014 and used a validated classification system to map services to seven subspecialties and quantify subspecialty-focused effort on the basis of work relative value units (RVUs). Radiologists with more than half of their billed work RVUs in a single subspecialty were designated subspecialists; the remainder were classified as generalists...
November 27, 2017: Radiology
https://www.readbyqxmd.com/read/29165048/psychoradiologic-utility-of-mr-imaging-for-diagnosis-of-attention-deficit-hyperactivity-disorder-a-radiomics-analysis
#14
Huaiqiang Sun, Ying Chen, Qiang Huang, Su Lui, Xiaoqi Huang, Yan Shi, Xin Xu, John A Sweeney, Qiyong Gong
Purpose To identify cerebral radiomic features related to diagnosis and subtyping of attention deficit hyperactivity disorder (ADHD) and to build and evaluate classification models for ADHD diagnosis and subtyping on the basis of the identified features. Materials and Methods A consecutive cohort of 83 age- and sex-matched children with newly diagnosed and never-treated ADHD (mean age 10.83 years ± 2.30; range, 7-14 years; 71 boys, 40 with ADHD-inattentive [ADHD-I] and 43 with ADHD-combined [ADHD-C, or inattentive and hyperactive]) and 87 healthy control subjects (mean age, 11...
November 22, 2017: Radiology
https://www.readbyqxmd.com/read/29166246/imaging-features-of-gadoxetic-acid-enhanced-and-diffusion-weighted-mr-imaging-for-identifying-cytokeratin-19-positive-hepatocellular-carcinoma-a-retrospective-observational-study
#15
Seo-Youn Choi, Seong Hyun Kim, Cheol Keun Park, Ji Hye Min, Ji Eun Lee, Yoon-Hyeong Choi, Bo Ra Lee
Purpose To determine the preoperative magnetic resonance (MR) imaging findings potentially most useful for predicting cytokeratin 19 (CK19)-positive hepatocellular carcinoma (HCC) and to evaluate the prognosis after curative resection in patients with a single HCC lesion positive for CK19 compared with patients with HCC who are negative for CK19. Materials and Methods The institutional review board approved this study and waived the requirement for informed consent. Two hundred four patients with CK19-negative HCC and 38 with CK19-positive HCC who underwent curative resection after gadoxetic acid-enhanced and diffusion-weighted MR imaging were retrospectively evaluated in a single institution...
November 21, 2017: Radiology
https://www.readbyqxmd.com/read/29166245/evidence-supporting-li-rads-major-features-for-ct-and-mr-imaging-based-diagnosis-of-hepatocellular-carcinoma-a-systematic-review
#16
An Tang, Mustafa R Bashir, Michael T Corwin, Irene Cruite, Christoph F Dietrich, Richard K G Do, Eric C Ehman, Kathryn J Fowler, Hero K Hussain, Reena C Jha, Adib R Karam, Adrija Mamidipalli, Robert M Marks, Donald G Mitchell, Tara A Morgan, Michael A Ohliger, Amol Shah, Kim-Nhien Vu, Claude B Sirlin
The Liver Imaging Reporting and Data System (LI-RADS) standardizes the interpretation, reporting, and data collection for imaging examinations in patients at risk for hepatocellular carcinoma (HCC). It assigns category codes reflecting relative probability of HCC to imaging-detected liver observations based on major and ancillary imaging features. LI-RADS also includes imaging features suggesting malignancy other than HCC. Supported and endorsed by the American College of Radiology (ACR), the system has been developed by a committee of radiologists, hepatologists, pathologists, surgeons, lexicon experts, and ACR staff, with input from the American Association for the Study of Liver Diseases and the Organ Procurement Transplantation Network/United Network for Organ Sharing...
November 21, 2017: Radiology
https://www.readbyqxmd.com/read/29156150/effect-of-shift-schedule-and-volume-on-interpretive-accuracy-a-retrospective-analysis-of-2-9-million-radiologic-examinations
#17
Tarek N Hanna, Christine Lamoureux, Elizabeth A Krupinski, Scott Weber, Jamlik-Omari Johnson
Purpose To determine whether there is an association between radiologist shift length, schedule, or examination volume and interpretive accuracy. Materials and Methods This study was institutional review board approved and HIPAA compliant. A retrospective analysis of all major discrepancies from a 2015 quality assurance database of a teleradiology practice was performed. Board-certified radiologists provided initial preliminary interpretations. Discrepancies were identified during a secondary review by a practicing radiologist or through an internal quality assurance process and were vetted through a consensus radiology quality assurance committee...
November 20, 2017: Radiology
https://www.readbyqxmd.com/read/29156149/quantitative-evaluation-of-vertebral-microvascular-permeability-and-fat-fraction-in-alloxan-induced-diabetic-rabbits
#18
Lei Hu, Yun Fei Zha, Li Wang, Liang Li, Dong Xing, Wei Gong, Jiao Wang, Yuan Lin, Fei Fei Zeng, Xue Song Lu
Purpose To determine longitudinal relationships between lumbar vertebral bone marrow permeability and marrow adipose tissue in a rabbit diabetes model by using quantitative dynamic contrast agent-enhanced (DCE) magnetic resonance (MR) imaging and iterative decomposition of water and fat with the echo asymmetry and least-squares estimation quantitation (IDEAL IQ) sequence. Materials and Methods Twenty rabbits were randomly assigned to the diabetic (n = 10) or control (n = 10) group. All rabbits underwent sagittal MR imaging of the lumbar region at fixed time points (0, 4, 8, 12, and 16 weeks after alloxan injection)...
November 20, 2017: Radiology
https://www.readbyqxmd.com/read/29156148/cm-101-type-i-collagen-targeted-mr-imaging-probe-for-detection-of-liver-fibrosis
#19
Christian T Farrar, Eric M Gale, Richard Kennan, Ian Ramsay, Ricard Masia, Gunisha Arora, Kailyn Looby, Lan Wei, Jayashree Kalpathy-Cramer, Michelle M Bunzel, Chunlian Zhang, Yonghua Zhu, Taro E Akiyama, Michael Klimas, Shirly Pinto, Himashinie Diyabalanage, Kenneth K Tanabe, Valerie Humblet, Bryan C Fuchs, Peter Caravan
Purpose To evaluate the biodistribution, metabolism, and pharmacokinetics of a new type I collagen-targeted magnetic resonance (MR) probe, CM-101, and to assess its ability to help quantify liver fibrosis in animal models. Materials and Methods Biodistribution, pharmacokinetics, and stability of CM-101 in rats were measured with mass spectrometry. Bile duct-ligated (BDL) and sham-treated rats were imaged 19 days after the procedure by using a 1.5-T clinical MR imaging unit. Mice were treated with carbon tetrachloride (CCl4) or with vehicle two times a week for 10 weeks and were imaged with a 7...
November 20, 2017: Radiology
https://www.readbyqxmd.com/read/29156147/electromagnetic-navigational-bronchoscopy-versus-ct-guided-percutaneous-sampling-of-peripheral-indeterminate-pulmonary-nodules-a-cohort-study
#20
Kavita M Bhatt, Yasmeen K Tandon, Ruffin Graham, Charles T Lau, Jason K Lempel, Joseph T Azok, Peter J Mazzone, Erika Schneider, Nancy A Obuchowski, Michael A Bolen
Purpose To compare the diagnostic yield and complication rates of electromagnetic navigational bronchoscopic (ENB)-guided and computed tomography (CT)-guided percutaneous tissue sampling of lung nodules. Materials and Methods Retrospectively identified were 149 patients sampled percutaneously with CT guidance and 146 patients who underwent ENB with transbronchial biopsy of a lung lesion between 2013 and 2015. Clinical data, incidence of complications, and nodule pathologic analyses were assessed through electronic medical record review...
November 20, 2017: Radiology
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