Automated tissue analysis from computerized axial tomographic scans

✍ Scribed by T. Sandor; M. LeMay; D.K. Kido; C.L. Rumbaugh

• Book ID: 103053126
• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 496 KB
• Volume: 14
• Category: Article
• ISSN: 0010-4809
• DOI: 10.1016/0010-4809(81)90029-x

✦ Synopsis

A computerized off-line analysis has been developed to study brain tissue properties from scans performed with an EM1 1005 headscanner. Except for the operator's identifying the inter-hemispheric fissure, the analysis is Molly automated. It subdivides the brain area into 80 subdivisions, arranged into four bands parallel to the calvarial contour. The program computes the values of the mean and the standard deviation for each subdivision, each band, and each hemisphere as well as for the whole calvaria. This arrangement facilitates the assessment of asymmetries of brain tissue. We found that a 3 x 3 smoothing filtration decreased the standard deviation by about a factor of 1.5 to 3 and the mean values of CT numbers for the subdivisions by about 2 to 3%.