Investigation of Cannabinoid 2-receptor Expression in the Brain and Spine of ALS-patients Compared to Healthy Controls With PET (18F-RoSMALS)

This clinical trial is a phase 1 study in which investigations with the weakly radioactive substance \[18F\]-RoSMA-18-d6 are being carried out for the first time. This radiolabeled substance will be used to study a specific protein in the brain and spinal cord of patients with ALS and healthy individuals. This particular protein, the cannabinoid type 2 receptor, is thought to play a role in the disease process of ALS. Furthermore, it is assumed that this protein is found more frequently in the brain and spinal cord of patients with ALS compared to healthy individuals. The following questions will be answered by this clinical trial. 1. Is this protein found, as suspected, increased in the brain and spinal cord of ALS patients compared to healthy individuals ? 2. Does the amount of this protein change during the course of the disease? 3. Are there any correlations between the observed changes in the amount of protein and the assessment of the course of the disease?