Linear measures of atrophy in mild Alzheimer disease

Giovanni B. Frisoni, Alberto Beltramello, Claudia Weiss, Cristina Geroldi, Angelo Bianchetti, Marco Trabucchi

Research output: Contribution to journalArticlepeer-review

Abstract

PURPOSE: To assess the sensitivity of linear measures of brain atrophy in the diagnosis of Alzheimer disease (AD) in the early stages. METHODS: Linear measures of regional frontal (bifrontal index, interhemispheric fissure width), medial temporal lobe (interuncal distance, minimum thickness of the medial temporal lobe), and hippocampal (hippocampal height, width of the choroid fissure, width of the temporal horn) atrophy were made on magnified MR images obtained in 46 patients with AD (33 with mild severity and 13 with moderate severity) and in 31 control subjects. Gaussian modeling was used to compute sensitivity with specificity set at 95%. Discriminant analysis was used to identify measures independently contributing to the ability to discriminate AD patients from control subjects. RESULTS: The measure with the best sensitivity in discriminating AD patients from control subjects was the width of the temporal horn. A compound measure of width of the temporal horn, width of the choroid fissure, height of the hippocampus, and interuncal distance could discriminate patients with mild AD from control subjects with 86% sensitivity. Cross validation in patients with moderate AD confirmed the usefulness of the model (81% sensitivity). Measures of hippocampal atrophy alone could discriminate patients with mild AD from control subjects with 83% sensitivity; in patients with moderate AD, cross validation produced 87% sensitivity. CONCLUSIONS: Linear measures of hippocampal atrophy can be a useful adjunct in the routine diagnosis of AD, even in its early stages.

Original languageEnglish
Pages (from-to)913-923
Number of pages11
JournalAmerican Journal of Neuroradiology
Volume17
Issue number5
Publication statusPublished - 1996

Keywords

  • Brain, atrophy
  • Brain, measurements
  • Dementia

ASJC Scopus subject areas

  • Clinical Neurology
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Fingerprint Dive into the research topics of 'Linear measures of atrophy in mild Alzheimer disease'. Together they form a unique fingerprint.

Cite this