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AJR. American Journal of Roentgenology

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https://www.readbyqxmd.com/read/28609188/subtraction-images-of-gadoxetic-acid-enhanced-mri-effect-on-the-diagnostic-performance-for-focal-hepatic-lesions-in-patients-at-risk-for-hepatocellular-carcinoma
#1
Sang Hyun Choi, So Yeon Kim, Seung Soo Lee, Ju Hyun Shim, Jae Ho Byun, Seunghee Baek, Moon-Gyu Lee
OBJECTIVE: The purpose of this study is to evaluate the effect of subtraction images of gadoxetic acid-enhanced MRI on the image interpretation of focal hepatic lesions in patients at risk for hepatocellular carcinoma (HCC). MATERIALS AND METHODS: We retrospectively analyzed 255 malignant nodules from 233 patients with chronic hepatitis or liver cirrhosis (187 men and 46 women; mean age, 55.2 years) who underwent preoperative gadoxetic acid-enhanced MRI and surgical resection...
June 13, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28609163/imaging-appearance-and-clinical-impact-of-preoperative-breast-mri-in-pregnancy-associated-breast-cancer
#2
Kelly S Myers, Lauren A Green, Lizza Lebron, Elizabeth A Morris
OBJECTIVE: The purpose of this study is to describe the imaging features of pregnancy-associated breast cancer (PABC) on breast MRI and to consider the impact of preoperative MRI on patient management. MATERIALS AND METHODS: A retrospective review of medical records from January 1994 to May 2014 identified 183 women who presented with a new diagnosis of breast cancer during pregnancy or within 1 year postpartum. MR images were available for 53 of these patients, all of whom were included in the study...
June 13, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28609130/cryoablation-of-abdominal-wall-endometriosis-a-minimally-invasive-treatment
#3
Elizabeth H Dibble, Kelly C D'Amico, Christina A Bandera, Peter J Littrup
OBJECTIVE: The objective of this study is to present cryoablation as a minimally invasive definitive treatment for abdominal wall endometriosis. We describe our experience with the outpatient application of cryoablation to treat symptomatic abdominal wall endometriosis in three patients. CONCLUSION: This feasibility study shows that minimally invasive cryoablation treated abdominal wall endometriosis in three patients and provided a prompt clinical response.
June 13, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28609118/sports-related-groin-pain-secondary-to-symphysis-pubis-disorders-correlation-between-mri-findings-and-outcome-after-fluoroscopy-guided-injection-of-steroid-and-local-anesthetic
#4
Caoimhe A Byrne, Dermot J Bowden, Abdullah Alkhayat, Eoin C Kavanagh, Stephen J Eustace
OBJECTIVE: The objective of our study was to correlate patterns of injury on preprocedural MRI with outcome after targeted fluoroscopy-guided steroid and local anesthetic injection of the symphysis pubis and its muscular attachments in a group of athletes with chronic groin pain. MATERIALS AND METHODS: Forty-five patients with chronic sports-related groin pain underwent MRI of the pelvis and a targeted fluoroscopy-guided symphyseal corticosteroid and local anesthetic injection...
June 13, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28609114/do-incidental-hyperechoic-renal-lesions-measuring-up-to-1-cm-warrant-further-imaging-outcomes-of-161-lesions
#5
Ankur M Doshi, Abimbola Ayoola, Andrew B Rosenkrantz
OBJECTIVE: The purpose of this study was to determine the outcomes of hyperechoic renal lesions measuring 1 cm or less at ultrasound examination. MATERIALS AND METHODS: This retrospective study included 161 hyperechoic renal lesions measuring 1 cm or less at ultrasound that were evaluated with follow-up ultrasound, CT, or MRI. Follow-up imaging examinations were reviewed to assess for definitive lesion characterization or size stability. RESULTS: Follow-up included 11 unenhanced CT, 39 contrast-enhanced CT, 52 unenhanced and contrast-enhanced CT, two unenhanced MRI, 50 unenhanced and contrast-enhanced MRI, and 87 ultrasound examinations...
June 13, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28609110/monitoring-tumor-volume-in-patients-with-prostate-cancer-undergoing-active-surveillance-is-mri-apparent-diffusion-coefficient-indicative-of-tumor-growth
#6
Veronica A Morgan, Christopher Parker, Alison MacDonald, Karen Thomas, Nandita M deSouza
OBJECTIVE: The purpose of this study was to measure longitudinal change in tumor volume of the dominant intraprostatic lesion and determine whether baseline apparent diffusion coefficient (ADC) and change in ADC are indicative of tumor growth in patients with prostate cancer undergoing active surveillance. SUBJECTS AND METHODS: The study group included 151 men (mean age, 68.1 ± 7.4 [SD] years; range, 50-83 years) undergoing active surveillance with 3D whole prostate, zonal, and tumor volumetric findings documented at endorectal MRI examinations performed at two time points (median interval, 1...
June 13, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28609109/accuracy-and-radiation-dose-reduction-of-limited-range-ct-in-the-evaluation-of-acute-appendicitis-in-pediatric-patients
#7
Michael Jin, Thomas R Sanchez, Ramit Lamba, Ghaneh Fananapazir, Michael T Corwin
OBJECTIVE: The purpose of this article is to determine the accuracy and radiation dose reduction of limited-range CT prescribed from the top of L2 to the top of the pubic symphysis in children with suspected acute appendicitis. MATERIALS AND METHODS: We performed a retrospective study of 210 consecutive pediatric patients from December 11, 2012, through December 11, 2014, who underwent abdominopelvic CT for suspected acute appendicitis. Two radiologists independently reviewed the theoretic limited scans from the superior L2 vertebral body to the top of the pubic symphysis, to assess for visualization of the appendix, acute appendicitis, alternative diagnoses, and incidental findings...
June 13, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28590821/t2-mapping-of-the-sacroiliac-joints-with-3-t-mri-a-preliminary-study
#8
Guillaume Lefebvre, Antonin Bergère, Mazen El Rafei, Alain Duhamel, Pedro Teixeira, Anne Cotten
OBJECTIVE: The objective of this study was to assess the feasibility of T2 relaxation time measurements of the sacroiliac joints. SUBJECTS AND METHODS: The sacroiliac joints of 40 patients were imaged by 3-T MRI using an oblique axial multislice multiecho spin-echo T2-weighted sequence. Manual plotting and automatic subdivision of ROIs allowed us to obtain T2 values for up to 48 different areas per patient (posterior and anterior parts, sacral, intermediate, and iliac parts)...
June 7, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28590819/pattern-and-distribution-of-distant-metastases-in-anaplastic-prostate-carcinoma-a-single-institute-experience-with-101-patients
#9
Dhakshinamoorthy Ganeshan, Ana M Aparicio, Ajay Morani, Vikas Kundra
OBJECTIVE: The aim of this study was to evaluate the sites and frequencies of distant metastases in patients with anaplastic prostate carcinoma and to correlate those findings with prostate-specific antigen (PSA) levels. MATERIALS AND METHODS: Patients with anaplastic prostate carcinoma (n = 101) underwent CT and bone scans before platinum-based chemotherapy. CT findings were retrospectively reviewed to identify the sites of metastases. CT findings were correlated with baseline PSA levels...
June 7, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28590817/long-term-surveillance-and-timeline-of-progression-of-presumed-low-risk-intraductal-papillary-mucinous-neoplasms
#10
Maia Kayal, Lyndon Luk, Elizabeth M Hecht, Catherine Do, Beth A Schrope, John A Chabot, Tamas A Gonda
OBJECTIVE: The purpose of this study was to assess risk of progression and rate of growth of presumed low-risk branch duct intraductal papillary mucinous neoplasms surveyed for more than 4 years. MATERIALS AND METHODS: A keyword search of electronic medical charts was performed for the years 2001-2013. Cystic lesions that met the criteria for clinical branch duct intraductal papillary mucinous neoplasm, lacked baseline high-risk or worrisome features, and had more than 4 years of surveillance were included in this study...
June 7, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28590809/radiology-and-ethics-education
#11
Aline Camargo, Li Liu, David M Yousem
OBJECTIVE: The purpose of this study is to assess medical ethics knowledge among trainees and practicing radiologists through an online survey that included questions about the American College of Radiology Code of Ethics and the American Medical Association Code of Medical Ethics. CONCLUSION: Most survey respondents reported that they had never read the American Medical Association Code of Medical Ethics or the American College of Radiology Code of Ethics (77.2% and 67...
June 7, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28590782/rhabdomyosarcoma-in-children-and-adolescents-patterns-and-risk-factors-of-distant-metastasis
#12
Jeong Rye Kim, Hee Mang Yoon, Kyung-Nam Koh, Ah Young Jung, Young Ah Cho, Jin Seong Lee
OBJECTIVE: The objective of this study is to evaluate patterns of distant metastasis and identified factors that may increase the risk of distant metastasis in pediatric patients with rhabdomyosarcoma. MATERIALS AND METHODS: This retrospective study included 69 patients (age, ≤ 20 years) who had rhabdomyosarcoma diagnosed between January 2000 and February 2016. Various imaging features, including distant metastasis, were evaluated on initial and follow-up imaging studies...
June 7, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28590775/mdct-angiography-with-3d-rendering-a-novel-cinematic-rendering-algorithm-for-enhanced-anatomic-detail
#13
Pamela T Johnson, Robert Schneider, Carolina Lugo-Fagundo, Michael B Johnson, Elliot K Fishman
OBJECTIVE: The two most widely used postprocessing 3D tools in clinical practice are volume rendering (VR) and maximum intensity projection (MIP). With the use of current-generation MDCT, these techniques enable accurate characterization of arterial anatomy and pathology in all anatomic regions. Recently, the VR algorithm has been enhanced by the incorporation of a new lighting model. This new technique-called cinematic rendering-generates photorealistic images with the potential to more accurately depict anatomic detail...
June 7, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28590770/pediatric-abdominal-radiographs-common-and-less-common-errors
#14
Sarah J Menashe, Ramesh S Iyer, Marguerite T Parisi, Randolph K Otto, Edward Weinberger, A Luana Stanescu
OBJECTIVE: Interpretation of abdominal radiographs of children benefits from a firm knowledge of the congenital anomalies and pathologies unique to this patient population, leveraged by a systematic approach. Interpretive errors place the patients and their families at risk for a delay in diagnosis, unnecessary additional imaging, a potential increase in the radiation burden, and possible psychologic trauma. CONCLUSION: In this article, we describe the common and uncommon potential pitfalls in pediatric abdominal radiography, using several of our own interpretive errors as a framework while providing teaching points to help avoid these mistakes...
June 7, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28570128/effect-of-a-biopsy-center-on-adequacy-rates-of-thyroid-nodule-fine-needle-aspiration
#15
Vincent A Leung, Anish Kirpalani, Gevork Mnatzakanian, Errol Colak, Paraskevi A Vlachou
OBJECTIVE: The purpose of this study was to investigate the effect of a biopsy center-a dedicated space with a dedicated ultrasound machine and technologist, staffed daily by a radiologist responsible for performing ultrasound-guided procedures only-on the rate of non-diagnostic or unsatisfactory thyroid fine-needle aspiration (FNA). MATERIALS AND METHODS: Three radiologists performed FNA on 1200 nodules in 998 patients between September 2010 and November 2015. We compared rates of nondiagnostic or unsatisfactory FNA before and after implementation of a biopsy center in September 2014 as part of a quality improvement initiative...
June 1, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28570127/journal-club-benefit-of-epinephrine-autoinjector-for-treatment-of-contrast-reactions-comparison-of-errors-administration-times-and-provider-preferences
#16
Daniella Asch, Kyle E Pfeifer, Jennifer Arango, Lawrence Staib, Joseph Cavallo, Jonathan D Kirsch, Melih Arici, Jay Pahade
OBJECTIVE: Given the rarity of contrast reactions in practice, most radiologists have little to no experience in their management, and errors are common. The purpose of this study was to compare treatment of a moderate-severity reaction with intramuscular epinephrine by either the traditional manual method of drawing up and delivering epinephrine with a needle and syringe or the use of an epinephrine autoinjector. SUBJECTS AND METHODS: All diagnostic radiologists at the study institution were requested to participate in an annual contrast reaction simulation program, which consisted of three simulation scenarios in a high-fidelity simulation laboratory...
June 1, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28570126/second-and-third-metatarsophalangeal-plantar-plate-tears-diagnostic-performance-of-direct-and-indirect-mri-features-using-surgical-findings-as-the-reference-standard
#17
André Fukunishi Yamada, Michel D Crema, Caio Nery, Daniel Baumfeld, Tania Szejnfeld Mann, Abdalla Y Skaf, Artur da Rocha Correa Fernandes
OBJECTIVE: The objective of our study was to assess the diagnostic performance and associations of the direct and indirect MRI features of the metatarsophalangeal (MTP) joint that are thought to be related to tears of the plantar plate (PP) using surgical findings as the reference standard. MATERIALS AND METHODS: We retrospectively included 23 patients with symptomatic instability of lesser MTP joints who had undergone preoperative 1.5-T MRI and surgical assessment...
June 1, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28570124/impact-of-the-prostate-imaging-reporting-and-data-system-version-2-on-mri-diagnosis-for-extracapsular-extension-of-prostate-cancer
#18
Yoh Matsuoka, Junichiro Ishioka, Hiroshi Tanaka, Tomo Kimura, Soichiro Yoshida, Kazutaka Saito, Yasuhisa Fujii, Kazunori Kihara
OBJECTIVE: The purpose of this study is to validate the Prostate Imaging Reporting and Data System, version 2 (PI-RADSv2), in assessing extracapsular extension (ECE), compared with PI-RADS, version 1 (PI-RADSv1). MATERIALS AND METHODS: A total of 210 patients with clinically localized prostate cancer underwent MRI and radical prostatectomy. Two readers independently interpreted the MR images. In PI-RADSv1, 5-point ECE risk scoring was used. In PI-RADSv2, ECE criteria included morphologic features and a tumor-capsule contact length (CL) greater than 10 mm...
June 1, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28570102/cross-sectional-imaging-of-intrahepatic-cholangiocarcinoma-development-growth-spread-and-prognosis
#19
Nieun Seo, Do Young Kim, Jin-Young Choi
OBJECTIVE: Intrahepatic cholangiocarcinoma (ICC) is a malignant tumor that arises from the intrahepatic bile ducts. Although the pathologic and imaging features of ICC have been clearly identified, recent updates have addressed the pathologic classification and imaging features of ICC using new imaging techniques. First, a proposed new pathologic ICC subclassification includes perihilar large duct and peripheral small duct ICCs. Second, advanced MR-based imaging features of ICC, such as hepatobiliary phase imaging using hepatocytespecific contrast material and DWI, have recently been described...
June 1, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28570101/mr-elastography-demonstrates-unique-regional-brain-stiffness-patterns-in-dementias
#20
Mona ElSheikh, Arvin Arani, Avital Perry, Bradley F Boeve, Fredric B Meyer, Rodolfo Savica, Richard L Ehman, John Huston
OBJECTIVE: The purpose of this study was to investigate age-corrected brain MR elastography (MRE) findings in four dementia cohorts (Alzheimer disease, dementia with Lewy bodies, frontotemporal dementia, and normal pressure hydrocephalus) and determine the potential use as a differentiating biomarker in dementia subtypes. SUBJECTS AND METHODS: Institutional review board approval and written informed consent were obtained to perform MRE on 84 subjects: 20 patients with normal pressure hydrocephalus, eight with Alzheimer disease, five with dementia with Lewy bodies, five with frontotemporal dementia, and 46 cognitively normal control subjects...
June 1, 2017: AJR. American Journal of Roentgenology
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