不同的重建算法和设置参数对PSMA PET图像的放射特征的影响:一项初步研究
Masoomeh Fooladi1, Yunus Soleymani2, Arman Rahmim3
1Department of Medical Physics and Biomedical Engineering, Tehran University of Medical Sciences, Tehran, Iran.
European journal of radiology
|February 4, 2024
概括
前列腺癌 (PCa) PET成像中的放射性特征显示了可变的强度. 重建方法的标准化对于这些定量成像生物标志物的可靠临床应用至关重要.
科学领域:
- 放射学和定量成像技术
- 医学物理 医学物理
- 在瘤学瘤学.
背景情况:
- 对瘤性正子发射断层扫描 (PET) 图像的放射学分析具有临床应用的巨大潜力.
- 放射学特征的可复制性对于常规临床使用和可靠的解释至关重要.
- 前列腺特异性膜抗原 (PSMA) -PET成像越来越多地用于前列腺癌 (PCa) 管理.
研究的目的:
- 为了研究PSMA-PET图像中的放射性特征的稳定性.
- 在不同的重建算法中比较特征可重现性:处罚概率 (Q.Clear) 和标准订序子集期望最大化 (OSEM).
- 评估不同重建参数对幻影和PCa患者数据集特征稳定性的影响.
主要方法:
- 使用了一个NEMA图像质量 (IQ) 幻影和8名PCa患者.
- 使用Q.Clear重建的PET图像具有不同的β值 (100-700) 和不同持续时间的OSEM (例如30秒到5分钟).
- 提取了129个放射性特征,并计算了变量系数 (COV),以评估各种重建方法和参数的稳定性.
主要成果:
- 根据重建算法和参数,放射学特征的变异性有显著差异.
- 53.5%的特征对OSEM的持续时间变化具有强度,而23.0%对Q.Clear的β值变化具有强度.
- 只有8.5%的特征显示COV ≤5%,14%显示5%
结论:
- 所有放射学特征都受到重建方法和参数的影响.
- 具有最小变异的特征是可再生量化瘤或转移性组织的首选.
- 在广泛临床实施之前,对PET放射性重建协议的标准化至关重要.
更多相关视频
07:15Machine Learning Algorithms for Early Detection of Bone Metastases in an Experimental Rat Model
Published on: August 16, 2020
6.8K
07:57Positron Emission Tomography-based Dose Painting Radiation Therapy in a Glioblastoma Rat Model using the Small Animal Radiation Research Platform
Published on: March 24, 2022
2.8K
相关概念视频
Positron Emission Tomography
4.2K
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...
4.2K
Radiological Investigation III: Pulmonary Angiogram and PET Scan
92
Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
92
