Abstract:
RATIONALE AND OBJECTIVES:Inguinal lymph nodes can be the first or the only clinical signs of tumor metastases. The aim of the study was to evaluate the role of contrast-enhanced high-resolution magnetic resonance (MR) lymphangiography in diagnosis of inguinal lymph node metastases. MATERIALS AND METHODS:The study enrolled 26 patients with inguinal lymph node metastases. Contrast-enhanced lymphangiography was performed using a 3.0T MR unit after intracutaneous injection of gadobenate dimeglumine into the interdigital webs of the dorsal foot. Images of inguinal lymph nodes were acquired before and after contrast injection. RESULTS:All patients exhibited edema in the subcutaneous layer with significant dilatation of lymphatic collectors in the affected lower limbs on MR images. Before contrast injection, the outline and structure of the affected nodes were unclear on T2 weighted images. Structural changes became evident on postinjection T1-weighted images. Nodal involvement on contrast enhanced MR lymphangiograms was characterized as: 1) heterogeneous structure with partial or marginal enhancement of the node indicating partial occupation by tumor; 2) homogeneous structure of the node without contrast enhancement, indicating total occupation with metastasis, with increase or no change in size; and 3) heterogeneous structure with punctiform nodal enhancement indicating diffuse growth of tumor within the node. Further examinations confirmed the diagnoses of inguinal lymph node metastases of either regional or distal tumors. CONCLUSIONS:Contrast-enhanced high-resolution MR lymphangiography was a sensitive modality in the diagnosis of malignant peripheral lymphedema and the identification of inguinal lymph node metastasis in patients with various tumor origins.
journal_name
Acad Radioljournal_title
Academic radiologyauthors
Liu N,Yan Z,Lu Q,Wang Cdoi
10.1016/j.acra.2012.09.014subject
Has Abstractpub_date
2013-02-01 00:00:00pages
218-23issue
2eissn
1076-6332issn
1878-4046pii
S1076-6332(12)00487-4journal_volume
20pub_type
杂志文章abstract:RATIONALE AND OBJECTIVES:We investigated the methodologic development of computed microtomography (CMT) for monitoring the development of osteoporosis in male Sprague-Dawley rats. METHODS:Eight rats were gastrectomized and eight rats were sham operated. Femurs, tibias, and tails were prepared, and CMT scans with spati...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(05)80487-8
更新日期:1995-09-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The Mammography Quality Standards Act requires practices to measure limited aspects of their performance. The authors conducted this study to calculate the differences in measurements of sensitivity and specificity due only to differences in the definitions used in the analysis. This included d...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(00)80057-4
更新日期:2000-12-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The aim of the study is to evaluate the effectiveness of an Emergency Radiology (ER) Core Curriculum training module and a Digital Imaging and Communications in Medicine (DICOM)-based interactive examination system to prepare first-year (postgraduate year 2 [PGY-2]) radiology residents and asse...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2006.02.057
更新日期:2006-06-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Needle biopsy is currently the only way to confirm prostate cancer. To increase prostate cancer diagnostic rate, needles are expected to be deployed at suspicious cancer locations. High-contrast magnetic resonance (MR) imaging provides a powerful tool for detecting suspicious cancerous tissues....
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2007.07.018
更新日期:2007-11-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The purpose of this prospective randomized study was to compare the long-term instructional effectiveness of a computer-based radiology multimedia textbook (MMTB) with that of a traditional lecture. METHODS:Volunteer faculty/fellows and residents were randomly assigned to either a computer-bas...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(05)80731-7
更新日期:1994-11-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The authors performed this study to determine the optimum threshold for performing computed tomographic (CT) angiography with shaded surface display (SSD). MATERIALS AND METHODS:A dedicated phantom was developed with an 8-mm luminal diameter. Each of 19 vessels had stenoses ranging from 0% to ...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/S1076-6332(03)80641-4
更新日期:2001-10-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To evaluate, in a group of candidates for liver donation, the role of unenhanced computed tomography (CT) and magnetic resonance (MR) as noninvasive means to measure hepatic steatosis (HS). MATERIALS AND METHODS:Sixty-one consecutive candidates underwent CT and MR evaluation for liver donation...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2014.01.007
更新日期:2014-04-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To identify the presence and extent of artifacts in prostate diffusion-weighted magnetic resonance imaging (DW-MRI) and discuss tradeoffs between imaging at 1.5 T (1.5 T) and 3.0 T (3.0 T). In addition, we aim to provide quantitative estimates of signal-to-noise ratios (SNRs) at both field stre...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2013.04.005
更新日期:2013-08-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The authors performed this study to evaluate whether digitally photographed, computer-annotated MR images produced by clinical radiologists and printed with an inexpensive photo printer are suitable for publication. MATERIALS AND METHODS:Laser prints of 20 magnetic resonance images of the brai...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(03)80378-1
更新日期:2002-03-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To assess the feasibility of 70-kVp high-pitch non-ECG-gated thoracic aortic computed tomography angiography (CTA) with 40-mL contrast agent compared to 100-kVp standard-pitch CTA with 60-mL contrast agent. MATERIALS AND METHODS:Sixty-seven patients (51 men and 16 women; mean age, 55 ± 14 year...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2015.03.007
更新日期:2015-07-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Total kidney volume is an important biomarker for the evaluation of autosomal dominant polycystic kidney disease progression. In this study, we present a novel approach for automated segmentation of polycystic kidneys from non-contrast-enhanced computed tomography (CT) images. MATERIALS AND ME...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2017.11.015
更新日期:2018-07-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:There is discordance between the American Board of Radiology (ABR) and many radiology trainees with respect to the most appropriate means to prepare for the ABR Core Examination. Whereas the ABR suggests that participation in routine clinical examination interpretation best prepares a trainee f...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2019.10.004
更新日期:2020-02-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:We have been called to reform radiology undergraduate medical education (UME) curricula. Clinically available clinical decision support provides an opportunity to improve education regarding appropriate imaging utilization, patient safety, and cost-effective care. MATERIAL AND METHODS:We creat...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2016.01.020
更新日期:2016-10-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Assess whether staff training in advanced rapport skills and self-hypnotic relaxation techniques reduces noncompletion rates during magnetic resonance imaging (MRI). METHODS AND MATERIALS:All staff of a free-standing MRI facility was invited to 3 hours of preparatory communication lectures. Ha...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2009.07.002
更新日期:2010-01-01 00:00:00
abstract:PURPOSE:To determine whether coronary artery anomalies can be detected on noncontrast computed tomography (CT) coronary artery calcium scoring (CCS) studies. MATERIALS AND METHODS:A total of 126 patients (mean age 62 years; 35 women) underwent noncontrast CCS and contrast enhanced coronary CT angiography (cCTA). Thirt...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2012.12.006
更新日期:2013-05-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Some deep pelvic abscesses are not accessible through anterior or lateral approaches because of the presence of organs and structures. The objective of this study was to assess the feasibility, safety, tolerability, and efficacy of a percutaneous presacral space approach by reviewing our clinic...
journal_title:Academic radiology
pub_type: 杂志文章,评审
doi:10.1016/j.acra.2016.06.009
更新日期:2016-12-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:We developed a technique for estimating the volumes of distribution and intratumoral ethanol concentrations using computed tomography (CT) scanning in patients undergoing percutaneous ethanol injection (PEI) treatment of malignant hepatic tumors. METHODS:A phantom containing anhydrous ethanol ...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/S1076-6332(96)80333-3
更新日期:1996-01-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The objective of this study was to develop and validate a predictive magnetic resonance imaging (MRI) activity score for ileocolonic Crohn disease activity based on both subjective and semiautomatic MRI features. MATERIALS AND METHODS:An MRI activity score (the "virtual gastrointestinal tract ...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2017.12.024
更新日期:2018-08-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Mammographic density and parenchymal patterns have been shown to be related to the risk of developing breast cancer. Thus, computerized texture analysis of breast parenchymal patterns on mammograms may be useful in assessing breast cancer risk. MATERIALS AND METHODS:A comparative evaluation wa...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2005.03.069
更新日期:2005-07-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:We compared computed radiography (CR) with a film digitizer as an image input device for transmitting radiographs to intensive care unit (ICU) displays. METHODS:Limiting spatial resolution and low-contrast detectability performance were determined for a 600-speed screen-film combination and CR...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(05)80375-7
更新日期:1996-02-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:We systematically characterized the information provided by chest radiography reports on a nationally representative sample of 822 elderly patients hospitalized in 297 acute-care hospitals in five states who had an admission diagnosis of congestive heart failure, acute myocardial infarction, or...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(96)80407-7
更新日期:1996-09-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Photodynamic therapy (PDT) is a promising strategy for treating cancer. PDT involves three components: a photosensitizer (PS) drug, a specific wavelength of drug-activating light, and oxygen. A challenge in PDT is the unknown biodistribution of the PS in the target tissue. In this preliminary s...
journal_title:Academic radiology
pub_type: 杂志文章,评审
doi:10.1016/j.acra.2013.11.009
更新日期:2014-02-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The authors compared diagnostic accuracy and callback rates with conventional screen-film mammograms and wavelet-compressed digitized images. MATERIALS AND METHODS:Sixty sets of mammograms (four views per case) were digitized at a spatial resolution of 100 microm. The images were wavelet compr...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(00)80004-5
更新日期:2000-05-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Test sets for assessing and improving radiologic image interpretation have been used for decades and typically evaluate performance relative to gold standard interpretations by experts. To assess test sets for screening mammography, a gold standard for whether a woman should be recalled for add...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2013.01.012
更新日期:2013-06-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To compare the results of two software-based methods, Quantra and Volpara, for volumetric breast composition assessment. MATERIALS AND METHODS:Four hundred forty-five normal, bilateral, two-view, digital mammograms were included. Breast volume (BV), fibroglandular tissue volume (FTV), and perc...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2014.12.003
更新日期:2015-04-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The purpose of this study was to evaluate residents' use of a radiology curriculum CD-ROM designed to provide ready access to the department's curricula, study materials, and Internet resources. MATERIALS AND METHODS:A survey questionnaire eliciting feedback about the usability and value of th...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(03)80085-5
更新日期:2003-06-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Presurgical assessment of fatty degeneration is important in the management of patients with rotator cuff tears. The Goutallier classification is widely accepted as a qualitative scoring system, although it is highly observer-dependent and has poor reproducibility. The objective of this study w...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2017.03.026
更新日期:2017-11-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Estimation of regional lung function parameters from hyperpolarized gas magnetic resonance images can be very sensitive to presence of noise. Clustering pixels and averaging over the resulting groups is an effective method for reducing the effects of noise in these images, commonly performed by...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2008.03.002
更新日期:2008-06-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Organomegaly in POEMS syndrome generally refers to the liver, spleen, and lymph nodes. This study investigates whether there is a significant difference in kidney sizes in patients with POEMS compared to normal controls. MATERIALS AND METHODS:Calculated kidney volumes from 77 patients with POE...
journal_title:Academic radiology
pub_type: 历史文章,杂志文章
doi:10.1016/j.acra.2011.05.008
更新日期:2011-10-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Early-stage diagnosis of Parkinson's disease (PD) is essential in making decisions related to treatment and prognosis. However, there is no specific diagnostic test for the diagnosis of PD. The aim of this study was to evaluate the role of texture analysis (TA) of magnetic resonance images in d...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2011.06.007
更新日期:2011-10-01 00:00:00