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相关概念视频

Computed Tomography01:10

Computed Tomography

4.6K
Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

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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...
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SHCT:基于多个倾斜源翻译的细分螺旋计算断层扫描.

Zhisheng Wang, Junning Cui, Yue Liu

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    此摘要是机器生成的。

    本研究引入了细分螺旋计算断层扫描 (SHCT) 用于大物体的高分辨率成像. SHCT有效地扩展视野,克服了传统螺旋CT在长物体检查方面的局限性.

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    科学领域:

    • 医疗成像医学成像
    • 计算机断层扫描 (CT) 是一种计算机断层扫描.
    • 图像重建 图像的重建

    背景情况:

    • 微型计算机断层扫描 (Micro-CT) 对于大物体的高分辨率检查至关重要.
    • 传统的螺旋式CT在容纳整个物体在视野 (FOV) 中方面存在局限性.
    • 对于大型物体,需要扩展FOV的扫描方法,无论是横向还是轴向.

    研究的目的:

    • 提出一种新的扫描方法,分段螺旋计算断层扫描 (SHCT),用于扩大微型CT的视野.
    • 为了实现长大物体的高分辨率成像.
    • 为拟议的SHCT方法开发一个高效的重建算法.

    主要方法:

    • 细分螺旋计算断层扫描 (SHCT) 的开发,使用多个倾斜源翻译 (SST).
    • 调整SST长度,斜率和扫描圆,以延长螺旋FOV.
    • 实现一个通用的反向投影-过 (G-BPF) 算法,以大致重建SHCT数据.

    主要成果:

    • SHCT有效地延长了螺旋FOV,用于成像大和长的物体.
    • 拟议的G-BPF算法确保了重建效率,并避免了横向截断工件.
    • 实验结果表明,SHCT对于高质量的体积重建的有效性,特别是降低音调时.

    结论:

    • 分段螺旋计算断层扫描 (SHCT) 是扩展微型CT视野的一种可行的方法.
    • 拟议的G-BPF算法为SHCT提供了高效和准确的重建.
    • SHCT 能够对大型和长长的物体进行高分辨率成像,图像质量在较低的音调下得到改善.