Academic radiology
-
The purpose of this study was to evaluate the utility of magnetic resonance (MR) imaging for indicating the extent of true tissue necrosis of the liver after radiofrequency (RF) ablation in comparison with histopathologic findings in dog models and an autopsy case. ⋯ MR imaging using the FLASH sequence can accurately determine the extent of the necrotic area after RF ablation.
-
Subject motion is well recognized as a significant impediment to resolution and sensitivity in functional magnetic resonance imaging (fMRI). A parallel confounder to fMRI data quality is geometric image distortion, particularly at high field strengths, due to susceptibility-induced magnetic field inhomogeneity. Consequently, many high-field echo-planar imaging methods incorporate a post-processing distortion correction by acquiring a field map of the sample prior to the fMRI measurement. However, field mapping methods impose a spatial mask on the data, since field information is only obtainable from regions with adequate signal-to-noise ratio (SNR). This masking, when applied to subsequent images in the fMRI time series, can clip the effects of motion, resulting in inaccurate estimation and correction of motion-based changes in the images. ⋯ It is preferable to perform motion realignment prior to correcting for geometric distortion.
-
Comparative Study
Blended learning in medical education: use of an integrated approach with web-based small group modules and didactic instruction for teaching radiologic anatomy.
To describe the development of and assess student satisfaction with a blended learning method for teaching radiologic anatomy that integrates web-based instruction with small group and didactic teaching. ⋯ An integration of computers with small and large group didactic instruction allow optimal use of faculty, conform to accepted theories of adult learning, and are well-accepted by students.
-
Opportunities for funded radiologic research are greater than ever, and the amount of federal funding coming to academic radiology departments is increasing. Even so, many medical school-based radiology departments have little or no research funding. ⋯ The consensus panel included radiologists who have leadership roles in some of the best-funded research departments, radiologists who direct other funded research programs, and radiologists with related expertise. The goals of the consensus panel were to identify the attributes associated with successful research programs and to develop an action plan for radiology research based on these characteristics.
-
Case Reports Comparative Study
Computer-assisted diagnosis by temporal subtraction in postoperative brain tumor patients: a feasibility study.
To introduce and evaluate a novel, image fusion-based technique that can be used to compare the findings of primary and control brain magnetic resonance imaging scans, with special attention to the differences found in this comparison. ⋯ Colored difference mapping is suitable for comparison of images between two different radiologic examinations and helps to show even minimal changes in brain tissues.