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Magnetic Resonance Imaging01:24

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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...
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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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Updated: Jan 12, 2026

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前列腺MRI中的扩散权重成像扭曲:一个横截面研究,比较仰卧和倾斜的位置.

Kang-Lung Lee, Andrew B Gill, Dimitri A Kessler

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    概括

    在前列腺MRI中倾斜的位置减少了直肠空气和扩散加权成像 (DWI) 扭曲,特别是当空气存在时. 然而,它降低了T2加权成像 (T2WI) 质量,影响了诊断准确度.

    关键词:
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    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:

    • 扩散加权成像 (DWI) 对于多参数 (mp) 前列腺MRI至关重要.
    • 音响平面DWI技术容易在直前列腺空气组织接口附近出现扭曲.

    研究的目的:

    • 评估是否容易患者的定位与卧卧的定位相比,尽量减少直肠空气和DWI扭曲.
    • 评估倾斜定位对整体图像质量的影响.

    主要方法:

    • 针对疑似前列腺癌接受mpMRI的患者进行前性研究.
    • 量化测量DWI扭曲和直肠空气体积.
    • 使用PI-QUAL和利克特尺度对DWI和T2加权成像 (T2WI) 的定性评估.

    主要成果:

    • 倾斜的位置显著减少了直肠空气体积,并提高了DWI质量的质量.
    • 在倾斜的位置上,T2WI质量明显较差.
    • 对于患有显著的直肠空气 (>4厘米3) 的患者,易于躺卧的位置减少了DWI扭曲.
    • 倾向成像增加了平均8分钟18秒的扫描时间.

    结论:

    • 倾斜的定位有效地减少了前列腺MRI中的DWI扭曲和直肠空气.
    • 减少DWI扭曲的好处必须与T2WI质量下降进行权衡.
    • 当直肠空气是一个问题时,倾斜的位置对DWI质量有好处,但可能会损害T2WI评估.