DaTSCAN is an important tool in the diagnosis and clinical management of Parkinson's syndromes, particularly for the diagnosis of Parkinson's disease or in the exploration of dementia-type neurodegenerative diseases.~The acquisition of tomoscintigraphic images is performed 3 hours after injection and lasts approximately 30 minutes on a conventional gamma camera.~Recently, the introduction of systems equipped with cadmium-zinc-telluride (CZT) technology has made it possible to reduce acquisition times and/or injected doses. Among these systems, some new 3D-ring CZT cameras allow tomoscintigraphic acquisitions to be carried out from the outset for the exploration of different organs.~Patients included in this study will be double scanned both on a conventional camera and on the new multipurpose CZT system, with CT.~The primary objective is to evaluate the diagnostic concordance between the DaTSCAN brain scintigraphy images from the new CZT SPECT/CT system and those from the conventional SPECT camera, when visually interpreted blindly by experienced observers (nuclear medicine physicians), according to a diagnostic scale.~Striatal binding ratios (SBR) will also be compared. Time reduction will also be evaluated on DaTSCAN SPECT data from the new multi-purpose CZT system.
DaTSCAN is an important tool in the diagnosis and clinical management of Parkinson's syndromes.~New cadmium-zinc-telluride (CZT) systems allow time and/or dose reduction. This can be interesting in DaTSCAN acquisitions as those are long-lasting, often on difficult patients.~This study will evaluate the diagnostic performances of a new 3D-ring CZT camera in DaTSCAN SPECT.