Institute for Instrumentation in Molecular Imaging (I3 M), Universidad Politécnica de Valencia - CSIC, Valencia, Spain.
Institute for Instrumentation in Molecular Imaging (I3 M), Universidad Politécnica de Valencia - CSIC, Valencia, Spain.
Eur Psychiatry. 2018 Apr;50:21-27. doi: 10.1016/j.eurpsy.2018.01.002. Epub 2018 Feb 2.
We present the first results of the MINDVIEW project. An innovative imaging system for the human brain examination, allowing simultaneous acquisition of PET/MRI images, has been designed and constructed. It consists of a high sensitivity and high resolution PET scanner integrated in a novel, head-dedicated, radio frequency coil for a 3T MRI scanner. Preliminary measurements from the PET scanner show sensitivity 3 times higher than state-of-the-art PET systems that will allow safe repeated studies on the same patient. The achieved spatial resolution, close to 1 mm, will enable differentiation of relevant brain structures for schizophrenia. A cost-effective and simple method of radiopharmaceutical production from C-carbon monoxide and a mini-clean room has been demonstrated. It has been shown that C-raclopride has higher binding potential in a new VAAT null mutant mouse model of schizophrenia compared to wild type control animals. A significant reduction in TSPO binding has been found in gray matter in a small sample of drug-naïve, first episode psychosis patients, suggesting a reduced number or an altered function of immune cells in brain at early stage schizophrenia.
我们呈现了 MINDVIEW 项目的首批成果。设计并构建了一种用于人脑检查的创新成像系统,可实现 PET/MRI 图像的同步采集。它由一个高灵敏度、高分辨率的 PET 扫描仪组成,集成在一个新型的、专门用于头部的射频线圈中,用于 3T MRI 扫描仪。从 PET 扫描仪获得的初步测量结果表明,其灵敏度比最先进的 PET 系统高 3 倍,这将允许在同一患者身上进行安全的重复研究。接近 1 毫米的空间分辨率将能够区分精神分裂症的相关脑结构。已经证明,可以使用 C-一氧化碳和小型清洁室来进行具有成本效益且简单的放射性药物生产方法。与野生型对照动物相比,新型 VAAT 缺失突变型精神分裂症小鼠模型中,C-氯丙嗪的结合潜能更高。在一小部分未经药物治疗的首发精神病患者的灰质中发现了 TSPO 结合的显著减少,这表明在精神分裂症早期阶段,大脑中的免疫细胞数量减少或功能改变。