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Table of Contents
Vol. 20, No. 2-3, 2005
Issue release date: August 2005
Section title: Original Research Article
Dement Geriatr Cogn Disord 2005;20:63–70
(DOI:10.1159/000085857)

Diagnostic Value of FDG-PET and HMPAO-SPET in Patients with Mild Dementia and Mild Cognitive Impairment: Metabolic Index and Perfusion Index

Döbert N.a · Pantel J.b · Frölich L.c · Hamscho N.a · Menzel C.a · Grünwald F.a
Departments of aNuclear Medicine and bPsychiatry, University of Frankfurt, Frankfurt, cDivision of Geriatric Psychiatry, Central Institute for Mental Health Mannheim, University Hospital of Heidelberg, Mannheim, Germany

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Article / Publication Details

First-Page Preview
Abstract of Original Research Article

Received: January 11, 2005
Published online: August 19, 2005
Issue release date: August 2005

Number of Print Pages: 8
Number of Figures: 1
Number of Tables: 5

ISSN: 1420-8008 (Print)
eISSN: 1421-9824 (Online)

For additional information: http://www.karger.com/DEM

Abstract

Objective: The diagnostic potential of F-18-2-fluoro-2-deoxy-D-glucose positron emission tomography (PET) and technetium-99m hexamethylpropylene amine oxime single-photon emission tomography (SPET) in early detection and differential diagnosis of early dementia was evaluated including a comparison of metabolic and perfusion indices (PI). Methods: Twenty-four patients with initial clinical suspicion of beginning dementia were examined, 12 of them with mild cognitive impairment. All patients underwent SPET and PET within 2 weeks. Data were compared with the final clinical diagnosis at follow-up – 9 with Alzheimer’s disease (AD), 1 with frontotemporal dementia, 1 with vascular dementia (VD), 7 with mixed type of dementia (MIX) and 6 without any type of dementia. Metabolic indices (MI) and PI were compared with each other. The regional cerebral blood flow difference (rCBFdiff) calculated as local uptake difference between the right and left hemisphere was measured for patients with VD and MIX. Results: PET showed higher sensitivity and specificity in identifying the different types of early dementia (44–91 and 78–89%, respectively) than SPET (11–64 and 79–89%, respectively), especially in detecting AD (sensitivity 44%, specificity 83%) and MIX (sensitivity 71%, specificity 78%). Especially in patients with mild cognitive impairment, PET was the superior imaging modality for predicting dementia. Using PET, dementia could be excluded in all patients who did not develop dementia during the follow-up. In all patients, a weak correlation between PI and MI was observed (rho = 0.64, p < 0.002). The rCBFdiff in patients with VD and MIX ranged from 7 to 37%. Conclusion: In this study on patients with initial suspicion of beginning dementia who underwent both imaging modalities, PET and SPET, PET was the superior imaging method, especially in the detection of early AD or MIX.

© 2005 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Research Article

Received: January 11, 2005
Published online: August 19, 2005
Issue release date: August 2005

Number of Print Pages: 8
Number of Figures: 1
Number of Tables: 5

ISSN: 1420-8008 (Print)
eISSN: 1421-9824 (Online)

For additional information: http://www.karger.com/DEM


Copyright / Drug Dosage / Disclaimer

Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher or, in the case of photocopying, direct payment of a specified fee to the Copyright Clearance Center.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
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