结合代金属工件减少和虚拟单能图像,在光子计数探测器CT CT中严重减少关节假肢相关的工件
Yannik C Layer1, Narine Mesropyan2, Patrick A Kupczyk2
1Department of Diagnostic and Interventional Radiology, University Hospital Bonn, Venusberg-Campus 1, 53127, Bonn, Germany. yannik.layer@ukbonn.de.
Scientific reports
|June 2, 2023
概括
虚拟单能图像 (VMI) 与代金属工件减少 (IMAR) 结合,在光子计数检测器CT (PCD-CT) 上显著减少关节假肢工件. 这种组合可以提高周围组织的诊断质量,为临床评估提供更好的可视化.
科学领域:
- 医疗成像医学成像
- 放射学 放射学是一门学科.
- 光子计数探测器CT (PCD-CT) 是一个光子计数探测器.
背景情况:
- 关节假肢可以在CT扫描中引起显著的人工物,阻碍准确的诊断.
- 光子计数检测器CT (PCD-CT) 提供了提高图像质量的潜力,但易受金属工件的影响.
- 虚拟单能图像 (VMI) 和代金属工件减少 (IMAR) 是解决这些挑战的先进技术.
研究的目的:
- 评估VMI的有效性,有或没有IMAR,在减少PCD-CT上的关节假肢手工件.
- 将VMI和IMAR的性能与标准多色图像 (PI) 的性能进行比较.
- 评估对邻近软组织和骨的诊断质量的影响.
主要方法:
- 追溯分析33个临床PCD-CT扫描与关节假肢文物.
- 与PI相比,使用IMAR和不使用IMAR的VMI (100-190keV) 的重建.
- 对文物和周围组织的定性 (放射学家评估) 和定量 (减弱,标准偏差) 分析.
主要成果:
- 与IMAR相结合的VMI显著减少了人工制造物的范围,并改善了与PI相比的定性评估.
- 100keV的VMI与IMAR产生了对膀等周围组织的最佳诊断质量.
- 定量分析显示,VMI100keV + IMAR提供了最大的人工物减少,而对骨的调整减弱最接近于零.
结论:
- 在PCD-CT中,VMI和IMAR的组合在缓解关节假肢手工件方面非常有效.
- 这种方法大大提高了CT成像在患有部植入物的患者的诊断效用.
- VMI,特别是在较低的keV范围内与IMAR相结合时,代表了PCD-CT中文物管理的重大进步.
更多相关视频
08:19Protocol 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
9.9K
10:24Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor
Published on: May 7, 2021
2.4K
相关概念视频
01:10Computed 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...
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...
4.6K
01:29Positron Emission Tomography
4.3K
Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
4.3K