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SINAPSE experts from around Scotland have developed ten online modules designed to explain medical imaging. They are freely available and are intended for non-specialists.

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Online Short Courses

HMPAO SPECT imaging of Alzheimer's disease patients with similar content-specific autobiographic delusion: Comparison using statistical parametric mapping

Author(s): R. T. Staff, A. Venneri, H. G. Gemmell, M. F. Shanks, S. J. Pestell, A. D. Murray

Delusional behavior and thinking are common symptoms in Alzheimer's disease (AD). In the past, these delusions have been considered to be psychotic complications of global neurologic dysfunction. Recently, authors have suggested that content-specific delusions in AD are associated with discrete regional abnormalities of the right hemisphere. Methods: This study compared Tc-99m-hexamethyl propyleneamine oxime (HMPAO) SPECT images of a group of AD patients with a similar autobiographic delusion with a group of AD patients without delusions and a group of AD patients with a range of delusions but without autobiographic content. The reconstructed SPECT data were compared using a statistical parametric mapping technique. Results: The autobiographic AD group had a significant area of hypoperfusion in the right frontal lobe when compared with the 2 other groups. The area of hypoperfusion included parts of Brodmann's areas 9 and 10. Region 9 has been identified previously as having a role in episodic memory retrieval. Conclusion: This result suggests that autobiographic delusions in AD may have an identifiable neuropsychologic mechanism and that it may be possible to identify an organic cause in some patients using Tc-99m-HMPAO SPECT.

Full version: Available here

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ISBN: 0161-5505
Publication Year: 2000
Periodical: Journal of Nuclear Medicine
Periodical Number: 9
Volume: 41
Pages: 1451-1455
Author Address: