Nuclear medicine - SPECT
RADIOPHARMACEUTICAL: 99mTc HMPAO, 690 MBq
TECHNICAL PROCEDURE AND RESULTS: Tracer injection performed during conversation with the patient with the patient alert. Normalised against cerebellar perfusion, today's study shows severe bilateral temporal hypoperfusion, with moderate bilateral parietal hypoperfusion. Milder hypoperfusion also extends into the frontal lobes bilaterally. The posterior cingulate again shows loss of its normal prominence of activity.
OVERALL IMPRESSION: Findings are consistent with both Alzheimer's disease and frontotemporal dementia. The severity of temporal involvement favours the latter.