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Densitometric analysis of scans: important sources of artefact

Published online by Cambridge University Press:  09 July 2009

R. R. Jacobson ,
S. W. Turner ,
R. E. Baldy  and
W. A. Lishman
R. R. Jacobson
Affiliation:
Institute of Psychiatry, London, and King's College School of Medicine and Dentistry, London
S. W. Turner
Affiliation:
Institute of Psychiatry, London, and King's College School of Medicine and Dentistry, London
R. E. Baldy
Affiliation:
Institute of Psychiatry, London, and King's College School of Medicine and Dentistry, London
W. A. Lishman*
Affiliation:
Institute of Psychiatry, London, and King's College School of Medicine and Dentistry, London
*
1 Address for correspondence: Professor W. A. Lishman, Institute of Psychiatry, De Crespigny Park, Denmark Hill, London SE5 8AF.
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Synopsis

Computed tomography (CT) research in psychiatry often relies on the assessment of minor structural changes. Recently, it has come to encompass changes in regional brain X-ray absorption density. The artefacts prone to be encountered in density measurements are reviewed, and illustrated by a series of studies carried out using a CT 1010 scanner. They are shown to be more important than hitherto assumed in the interpretation of CT scan research.

Type
Research Article
Information
Psychological Medicine , Volume 15 , Issue 4 , November 1985 , pp. 879 - 889
Copyright
Copyright © Cambridge University Press 1985

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