At arterial phase gadolinium-enhanced magnetic resonance (MR) angiography, artifactual stenosis of the subclavian artery is sometimes seen adjacent to the subclavian vein on the side of the contrast material injection. Experiments in phantoms and in 19 patients showed increased artifact with longer echo time and higher concentration of injected contrast material. An effective method to substantially decrease this susceptibility artifact was threefold dilution of gadopentetate dimeglumine and use of a short echo time (1 msec).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1148/radiology.217.2.r00oc37581 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Non-Invasive Monitoring of Cerebral Edema Using Ultrasonic Echo Signal Features and Machine Learning.
Brain Sci
November 2024
State Key Laboratory of Ultrasound in Medicine and Engineering, Chongqing Medical University, Chongqing 400016, China.
Objectives: Cerebral edema, a prevalent consequence of brain injury, is associated with significant mortality and disability. Timely diagnosis and monitoring are crucial for patient prognosis. There is a pressing clinical demand for a real-time, non-invasive cerebral edema monitoring method.
View Article and Find Full Text PDFTwo-dimensional T2*-weighted multi-shot echo-planar imaging to detect cerebral microbleeds in neurocognitive disorders: A time-efficient alternative to susceptibility weighted angiography.
Eur J Radiol
January 2025
Department of Radiology, Rouen University Hospital, Rouen, Normandy, France. Electronic address:
Purpose: To evaluate the effectiveness of ultra-fast two-dimensional (2D) T2*-weighted multi-shot echo-planar imaging (MS-EPI) for the detection of cerebral microbleeds (CMB) in cognitive disorders.
Methods: Sixty-eight patients referred for neuroimaging to investigate cognitive disorders underwent 3 T MR imaging, with both 2D T2*-weighted MS-EPI and susceptibility-weighted angiography (SWAN). Microbleeds were separately assessed on 2D T2*-weighted MS-EPI and SWAN by 2 raters.
Over the past two decades, rapid advancements in magnetic resonance technology have significantly enhanced the imaging resolution of functional Magnetic Resonance Imaging (fMRI), far surpassing its initial capabilities. Beyond mapping brain functional architecture at unprecedented scales, high-spatial-resolution acquisitions have also inspired and enabled several novel analytical strategies that can potentially improve the sensitivity and neuronal specificity of fMRI. With small voxels, one can sample from different levels of the vascular hierarchy within the cerebral cortex and resolve the temporal progression of hemodynamic changes from parenchymal to pial vessels.
View Article and Find Full Text PDFMagnetic Resonance Imaging of Monocrotaline-Induced Pulmonary Hypertension in Rats Using Radial Scanning with Retrospective Gating.
Bull Exp Biol Med
January 2025
Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia.
Article Synopsis
- MRI with radial scanning was used to create detailed images of rat lungs, both healthy and those with pulmonary hypertension.
- The retrospective gating method enabled the analysis of lung function during different breathing phases, revealing decreased lung volumes and tidal volumes in the rats with pulmonary hypertension.
- Ventilation maps indicated a significant reduction in airflow in the affected areas, showcasing the method's effectiveness in assessing lung pathology and its influence on respiratory function.
Imaging Characteristics of Primary Mucinous Cystadenocarcinoma of the Breast: A Case Report and Literature Review.
Curr Med Imaging
January 2025
Department of Pathology, Affiliated Jinhua Hospital Zhejiang University School of Medicine, Jinhua, Zhejiang, 32100, P. R. China.
Introduction: Mucinous Cystadenocarcinoma (MCA) of the breast remains a relatively rare condition, and to date, there is no systematic summary of its imaging manifestations. Therefore, this report presents a detailed account of the diagnosis and treatment of mucinous cystadenocarcinoma in a 40-year-old woman, with a particular focus on imaging findings. Additionally, we conducted a comprehensive literature review on this disease and summarized its key imaging features.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!