相关实验视频

Updated: Jun 14, 2025

Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences

Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences

Published on: May 17, 2018

一个扩散准备的减少FOV序列为前列腺MRI近金属植入物的前列腺MRI

Philip K Lee¹, Jeremiah J Hess^1,2, Andrew A Gomella¹

¹Radiology, Stanford University, Stanford, California, USA.

Magnetic resonance in medicine

|September 2, 2024

概括

一种新的扩散成像技术允许在部植入患者中清晰查前列腺癌,克服常见的MRI人工物. 这种方法在短短6分钟内就能获得没有扭曲的图像.

科学领域:

放射学放射学是一门学科.
医疗成像医学成像
前列腺癌的诊断方法前列腺癌的诊断方法

背景情况:

金属全关节置换 (THRs) 在前列腺MRI的标准扩散权重成像 (DWI) 中会导致人工物.
通常用于DWI的回声平面成像 (EPI) 特别容易受到扭曲和信号丢失在THR附近.

研究的目的:

开发一个扩散权重成像 (DWI) 序列用于前列腺癌查在金属关节整体置换 (THRs) 患者.
为了实现临床上可行的扫描时间,同时避免常规回声平面成像 (EPI) 常见的文物.

主要方法:

开发了一种减少视野 (FOV) 扩散准备的序列,利用高射频 (RF) 带宽脉冲和刺激的回声通路.
切片选择梯度反转产生了减少的FOV,而3D射频破坏的梯度回声读取图像显示了准备好的磁化.
该序列在幻影,健康志愿者 (有/没有THR) 和接受前列腺MRI的患者中得到验证.

主要成果:

拟议的序列在异响的存在下显示出对阴影和扭曲工件的强度,与标准DWI-EPI不同.
来自新序列的明显扩散系数 (ADC) 估计值与传统DWI-EPI的估计值相当.

结论:

在THR患者中,使用常规的3TMRI可实现前列腺无变扩散权重成像.
该技术允许在6分钟的扫描时间内进行800s/mm2,1.7x1.7x4mm3分辨率的b值的前列腺癌查.

关键词:

扩散磁力共振成像 (MRI) 扩散金属文物金属文物前列腺酒后驾驶酒后驾驶

更多相关视频

Registered Bioimaging of Nanomaterials for Diagnostic and Therapeutic Monitoring

Registered Bioimaging of Nanomaterials for Diagnostic and Therapeutic Monitoring

Published on: December 9, 2010

Tracking the Mammary Architectural Features and Detecting Breast Cancer with Magnetic Resonance Diffusion Tensor Imaging

Tracking the Mammary Architectural Features and Detecting Breast Cancer with Magnetic Resonance Diffusion Tensor Imaging

Published on: December 15, 2014

相关概念视频

Magnetic Resonance Imaging

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...

Imaging Studies I: CT and MRI

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...