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相关概念视频

Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

13
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...
13
Imaging Studies I: Kidney, Ureter, and Bladder Studies01:28

Imaging Studies I: Kidney, Ureter, and Bladder Studies

11
Kidney, Ureter, and Bladder (KUB) StudiesKidney, Ureter, and Bladder (KUB) studies are standard diagnostic imaging procedures used to assess the anatomy of the urinary system. They are commonly utilized for patients experiencing abdominal pain or urinary symptoms. By using a simple X-ray of the abdomen, KUB studies can reveal structural and pathological abnormalities within the kidneys, ureters, and bladder. These studies are particularly valuable in diagnosing kidney stones, urinary...
11
Imaging Studies V: Intravenous Urography and Retrograde Pyelography01:22

Imaging Studies V: Intravenous Urography and Retrograde Pyelography

41
IntroductionIntravenous Urography (IVU) and Retrograde Pyelography (RP) are important diagnostic imaging techniques used to evaluate the urinary system. These methods help identify structural abnormalities, obstructions, and functional issues in the kidneys, ureters, and bladder. Both procedures use iodine-based contrast media to enhance the visibility of urinary tract structures on X-ray images, though they differ in their methods and indications.1. Intravenous Urography (IVU)Intravenous...
41
Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

12
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: Jul 15, 2025

A Whole Body Dosimetry Protocol for Peptide-Receptor Radionuclide Therapy PRRT: 2D Planar Image and Hybrid 2D+3D SPECT/CT Image Methods
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剂量优化使用深度学习工具在Urolithiasis的各种CT协议中:一个物理人类幻影研究

Jae Hun Shim1, Se Young Choi1, In Ho Chang1

  • 1Department of Urology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 06973, Republic of Korea.

Medicina (Kaunas, Lithuania)
|September 28, 2023
PubMed
概括

深度学习可以将CT扫描的辐射剂量减少三分之一,同时保持图像质量. 这种人工智能工具提高了诊断准确度,特别是在较低的辐射设置下,为医学成像提供了一个有前途的方法.

关键词:
深度学习是一种深度学习.幻影,成像成像的使用.辐射剂量 辐射剂量断层扫描,X射线计算成像尿病是一种尿病.

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科学领域:

  • 医疗成像医学成像
  • 放射学中的人工智能
  • 辐射剂量优化 辐射剂量优化

背景情况:

  • 确定CT扫描的最佳辐射剂量对于保持图像质量至关重要.
  • 深度学习 (DL) 应用程序显示出增强医疗图像的潜力.
  • 评估DL对图像质量和辐射剂量的影响至关重要.

研究的目的:

  • 评估深度学习应用程序在优化CT成像辐射剂量的有效性.
  • 通过减少辐射暴露来保持诊断图像质量.
  • 将深度学习增强的图像与传统的重建方法进行比较.

主要方法:

  • 尿酸石头被放置在一个物理的人类幻影中.
  • 用不同的管电压 (120, 100, 80 kV) 和电流时间产物 (100, 70, 30, 15 mAs) 进行CT扫描.
  • 图像使用过后投影 (FBP),代重建 (IR,iDose) 和基于知识的代模型重建 (IMR) 进行了重建,使用和不使用深度学习应用程序.
  • 放射科医生和泌尿科医生的客观 (霍恩斯菲尔德单位标准偏差) 和主观评估被用来评估图像质量和诊断准确性.

主要成果:

  • 深度学习应用程序在所有重建方法中减少了客观图像噪声.
  • 应用深度学习的FBP在约三分之一的辐射剂量 (100kV-30mAs) 达到与IR相似的噪声水平.
  • 主观图像质量得分在辐射剂量低于100kV-30mAs时恶化.
  • 通过深度学习,诊断的准确性在100kV-30mAs以下的设置中得到改善,除了80kV-15mAs.

结论:

  • 应用深度学习的FBP在100kV-30 mAs或更高的设置下显示了与IR相似的图像质量.
  • 通过使用深度学习,在100kV-30mAs下,可以减少约三分之一的辐射剂量,同时保持客观噪声水平.
  • 深度学习有望减少CT成像中的辐射暴露,而不会影响诊断性能.