3D-OSEM 与 FORE + OSEM 相比:3D-OSEM 与 FORE + OSEM 相比:3D-OSEM 与 FORE + OSEM 相比:3D-OSEM 与 FORE + OSEM 相比:3D-OSEM 与 FORE +
Keisuke Tsuda1,2, Takayuki Suzuki2,3, Kazuhito Toya4
1Department of Radiological Technology, Faculty of Health Science, Juntendo University, Tokyo, Japan.
World journal of nuclear medicine
|October 19, 2023
概括
对于短时间的氧葡萄糖 (FDG) 定子发射断层扫描 (PET) 扫描,富里埃重组 (FORE) + 订序子集预期最大化 (OSEM) 算法提供了更清晰的病变检测,尽管与3D-OSEM相比,图像质量较差.
科学领域:
- 核医学就是核医学.
- 医疗成像医学成像
- 放射化学 放射化学是指辐射化学.
背景情况:
- 在氧葡萄糖 (FDG) 定子发射断层扫描 (PET) 中,较短的获取时间对于患者的舒适性和吞吐量是可取的.
- 重建算法在低剂量PET成像中显著影响图像质量和诊断准确性.
研究的目的:
- 为了比较福里埃重组 (FORE) +有序子集预期最大化 (OSEM) 和3D-OSEM重建算法的FDG PET成像的性能,采用较短的采集时间.
- 确定在加速FDG PET扫描中平衡图像质量和病变检测能力的最佳算法.
主要方法:
- 幻影研究使用了不同尺寸和放射性比率的球体,采集时间从15秒到180秒.
- 临床评估涉及19名患者的腹部中部FDG PET图像,视觉和定量评估 (SUVmax,CV).
- 用FORE+OSEM和3D-OSEM算法重建图像数据进行比较分析.
主要成果:
- FORE+OSEM产生了更高的变化系数 (CV),表明图像质量较差,但保持了相对恒定的最大标准化吸收值 (SUVmax).
- 3D-OSEM提供了更好的图像质量 (较低的CV),但显着低估了SUVmax,在短的扫描时间内,小病变变得模糊.
- 幻影和临床结果显示了类似的趋势,FORE+OSEM显示,尽管整体图像质量较差,但FDG吸收率更明显.
结论:
- 与短期FDG PET扫描中的3D-OSEM相比,FORE+OSEM重建的图像质量较差.
- 尽管图像质量较差,但FORE+OSEM重建在检测病变方面更有效,因为在加速扫描中更清晰地可视化了FDG吸收.
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