Title:
FAT DISTRIBUTION IMAGE GENERATION METHOD IN CT DEVICE
Document Type and Number:
Japanese Patent JP3171923
Kind Code:
B2
Abstract:
PURPOSE: To generate an image for showing the distribution of fat by scanning different X-ray tube voltages by means of a phantom loaded with plural sample rods different in the fat reference substance and bone-salt equivalent substance density, and calculating the fat rate parameter from a regression straight line of CT value/bone-salt equivalent substance density and a specified equation.
CONSTITUTION: Different tube voltages are scanned by using a phantom loaded with a bone-salt equivalent substance and a fat reference substance in steps D1, D7 The CT value αwf of a tissue containing a fat is detected in steps D2, D8 and the CT value of the bone-salt equivalent substance is detected to calcul a regression straight line of the CT value/bone-salt equivalent substance density so as to designate the CT value as the CT value αnf of a tissue not containing a fat. In steps D3, D9 further, the CT value αff of a fat reference substance is detected, in steps D4, D10 and the CT value αat of a blood portion is detected in steps D5, D11. The respective CT values are made correspond to an equation I as fat rate parameters in steps D6, D12, and the fat rate parameter β is calculated from the regression straight line and the equation I in a step 13.
Inventors:
Makoto Gono
Tetsuya Horiuchi
Tetsuya Horiuchi
Application Number:
JP13320492A
Publication Date:
June 04, 2001
Filing Date:
May 26, 1992
Export Citation:
Assignee:
GE Yokogawa Medical System Co., Ltd.
International Classes:
A61B6/00; A61B6/03; A61B10/00; G06T5/00; (IPC1-7): A61B6/03; A61B10/00
Domestic Patent References:
| JP599829A | ||||
| JP5237081A | ||||
| JP58167524A |
Attorney, Agent or Firm:
Shinshiro Arichika