Method and apparatus for estimating tissue volumes in magnetic r

Details Method and apparatus for estimating tissue volumes in magnetic r Method and apparatus for estimating tissue volumes in magnetic r

1993-03-17

1995-06-20

Cohen, Lee S.

Surgery

Truss

Pad

36441313, 382128, A61B 5055

Patent

active

054253683

ABSTRACT:
A fuzzy logic approach to the problem of distinguishing cerebrospinal fluid, gray and white matter pixels in magnetic resonance images of the brain. An unsupervised fuzzy clustering procedure based on a variant of the fuzzy c-means algorithm computes automatically, with virtually no operator intervention, the percentage area of each of these three compartments in each image. Each volume element represented in the image can belong to all compartments in varying degrees. The procedure requires input of the number of different compartments in the image, as well as a parameter which determines the amount of overlap of compartment boundaries. Preliminary data processing involves noise removal from images by highpass filtering. The final solution is substantially independent of required initial estimates of the gray scale values that are most representative of the white, gray and cerebrospinal fluid compartments in the image. The method is useful in the diagnosis of hydrocephalus.

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