<prompt> Tc HMPAO SPECT is used for:Cerebral perfusion imagingRenal imagingParathyroid imagingThyroid imaging  <response>: Ans. A. Cerebral perfusion imaging Tc HMPAO SPECT is used for cerebral perfusion assessment. For example, in Alzheimers it shows reduced perfusion of the temporoparietal region. D-SPECT represents the next step in the evolution of SPECT technology and is based on a unique acquisition geometry. It has nine arrays of cadmium zinc telluride CZT detectors, each of which rotates around its central axis with programmable angular rotation. 