Method of reducing noise in volume imaging

Details Method of reducing noise in volume imaging Method of reducing noise in volume imaging

2005-03-01

2005-03-01

Bruce, David V (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S901000

Reexamination Certificate

active

06862334

ABSTRACT:
In a method of visualizing a three-dimensional volume image data set (1), a two-dimensional image (15) is formed by projecting volume image data on a projection plane in that for each pixel (16) there is determined an intensity value which corresponds to the maximum value or minimum value of the mean intensity along a projection path (17) through the imaged volume and associated with the relevant pixel. In order to determine the mean intensity, averaging is performed over a plurality of intensity values which neighbor one another along the projection path (17). In order to achieve effective noise suppression as well as adequate along image contrast , averaging is performed over at least partly overlapping interval (18to22) along the projection path (17). The method offer the advantage that the user can choose the width of the averaging interval as an additional free parameter, so that image contrast and background noise can be influenced independently.

REFERENCES:
patent: 5204627 (1993-04-01), Mistretta et al.
Thelissen, G.R.P.; Maximum Average Projection (MAP); A fast and robust way to visualize 3-D MR data sets; Proc. of ISMRM, 1998; p. 2105.

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