BONE IMAGE PROCESSING METHOD AND BONE STRENGTH EVALUATION METHOD

Japanese Patent JP3499761

B2

PROBLEM TO BE SOLVED: To obtain an index better reflecting the strength of a bone rather than the density thereof by repeating for the whole of a bone image a processing in which a scanning is made in the direction of the starting point of a raster scanning line from the bottom side of an isosceles triangle to determine an extracted bone region as cortical bone region and the cortical bone region is finally defined if an element of a bone image exists within the region to separate the bone image into the cortical bone region and a bone beam region.
SOLUTION: Firstly, a raster scanning line is extended from a starting point and when the raster scanning line reaches a bone region, an isosceles triangle is set having the reached point as apex and the axis of the scan line as height and the apex is fixed to specify an isosceles triangle that can maximize the area thereof as far as drawn in the bone region. A scanning is made reversely to the starting point of the raster scanning from the bottom side of the specified isosceles triangle to determine the selected bone area as cortical bone area and if any element of a bone image exists in the region, it is imaged. Upon the completion of the imaging by the processing, the imaged bone region can be separated as cortical bone region and the non-imaged bone region as bone beam region.

Koichiro Omatsu
Ayumu Masaki
Osamu Oshiro
Kunihiro Chihara

JP30097598A

February 23, 2004

October 22, 1998

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Teijin Limited

A61B6/03; A61B6/00; (IPC1-7): A61B6/00; A61B6/03

JP9122107A
JP9294740A
JP5154155A

Hideko Mihara

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