使用临床全身PET/CT系统进行体内小动物成像的可行性
Julia G Mannheim1,2, Wenhong Lan3, Maurizio Conti4
1Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard-Karls University Tuebingen, Roentgenweg 13, 72076, Tuebingen, Germany. julia.mannheim@med.uni-tuebingen.de.
EJNMMI physics
|July 23, 2025
概括
全身PET/CT扫描仪为小动物成像提供了有希望的灵敏度. 临床全身PET/CT扫描仪可以在临床前研究中实现可靠的量化,尽管空间分辨率低于专用系统.
科学领域:
- 医疗成像医学成像
- 临床前研究 临床前研究
- 核医学就是核医学.
背景情况:
- 临床PET扫描仪在临床前研究的空间分辨率和灵敏度方面存在局限性.
- 全身 (TB) PET/CT扫描仪为小动物成像提供了增强的灵敏度和扩展的视野.
- 这项研究评估了Biograph Vision Quadra TB-PET/CT用于动物成像,与专门的小动物扫描仪对比.
研究的目的:
- 评估Biograph Vision Quadra TB-PET/CT用于动物成像的可行性和性能.
- 将TB-PET/CT和专门用于小动物的PET扫描仪之间的量化准确度和图像质量进行比较.
- 确定临床TB-PET/CT对于临床前研究应用的适用性.
主要方法:
- 评估恢复系数 (RC),图像噪声和重建参数,使用临床前NEMA NU 4-2008幻影.
- 通过同时在Quadra上和单独在Inveon DPET上扫描冷小鼠来评估体内定量精度.
- 确定肝脏,肌肉和大脑区域的SUVmean和SUVmax值,评估位置依赖的影响.
主要成果:
- 夸德拉的幻棒分辨率≥2毫米,RC可比,噪音低于Inveon.
- 在轴视野中没有观察到任何显著的位置依赖效应.
- 在扫描仪之间实现了一致的SUV平均值,而SUVmax在肌肉和大脑区域显示出更大的变化.
结论:
- 临床TB-PET/CT扫描仪可以在临床前研究中实现强大的SUV平均量化,尽管与专用系统 (~1.5mm) 相比,空间分辨率较低 (3-4mm).
- 在麻醉小鼠的成功体内成像证明了在临床前研究中使用临床TB-PET/CT的可行性.
- 空间分辨率仍然是一个限制因素,但TB-PET/CT为敏感的小动物成像提供了可行的选择.
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