Acquisition Parameters for DaTscan SPECT

ParameterStandard recommendation
Camera typeLarge–field-of-view multidetector
Energy peak159 keV
Energy window10%
CollimatorLow-energy high-resolution
Patient positionSupine with arms down; head in an off-table head holder
Camera positionCentered over the head
Injection-to-scan time3–6 h
Acquisition typeStep-and-shoot or continuous
Orbit typeCircular, with the smallest possible radius of rotation (11–15 cm)
Matrix128 × 128
Number of projections120 (3°/projection)
Time per projection30–40 s
  • In SPECT/CT protocols, the manufacturer’s recommendations are followed for the CT acquisition parameters.