X-ray or gamma ray systems or devices – Specific application – Radiation coding
Patent
1985-11-15
1991-06-04
Westin, Edward P.
X-ray or gamma ray systems or devices
Specific application
Radiation coding
378251, 378901, 36441315, G06F 1500
Patent
active
050220667
ABSTRACT:
The invention relates to a method of forming images of layers of an object, and a device for performing this method. The layer images are formed from single-shadow images produced from different radiation source positions. The image values of the single-shadow images are first stored in a first as well as in a second memory. From the values of given image points in the second memory, a layer image value is calculated. The layer image value is added to the corresponding image points in a third memory. From the differences between these standardized sums in the third memory and the original image values in the first memory, there are formed correction values for correcting the image values in the second memory. Improved layer images are thus obtained.
REFERENCES:
patent: 3499146 (1970-03-01), Richards
patent: 4598369 (1986-07-01), Wang et al.
patent: 4630296 (1986-12-01), Haaker et al.
Haaker Paul R.
Klotz Erhard P. A.
Koppe Reiner H.
Linde Rolf E.
Botjer William L.
Porter David P.
U.S. Philips Corp.
Westin Edward P.
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