Method for converting CT data to linear attenuation...

Details Method for converting CT data to linear attenuation... Method for converting CT data to linear attenuation...

2005-09-27

2005-09-27

Bruce, David V (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Absorption

C378S004000, C378S008000, C378S901000

Reexamination Certificate

active

06950494

ABSTRACT:
A method for converting output data from a computer tomography (CT) device to linear attenuation coefficient data includes a step of receiving output pixel data from a CT device for a pixel of a CT image. The value of the pixel data is compared to a predetermined range. If the value is within the predetermined range, a linear attenuation coefficient is calculated from the pixel data using a first conversion function corresponding to said predetermined range. If the value is outside the predetermined range, the linear attenuation coefficient is calculated from the pixel data using a second conversion function corresponding to a range outside said predetermined range. The calculated coefficient is stored in a memory as part of a linear attenuation coefficient map.

REFERENCES:
patent: 2004/0264626 (2004-12-01), Besson
patent: 2004/0264627 (2004-12-01), Besson
patent: 2004/0264628 (2004-12-01), Besson

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