Method of and device for determining a radiation absorption dist

Details Method of and device for determining a radiation absorption dist Method of and device for determining a radiation absorption dist

1979-09-07

1984-07-17

Krass, Errol A.

Boots, shoes, and leggings

378901, G06F 1542

Patent

active

044609612

ABSTRACT:
The invention relates to a method of and a device for determining a radiation absorption distribution in a part of a body. Per measuring value a contribution of the absorption value in each element of a matrix imagined in the part is calculated. It is demonstrated that this contribution equals the value of the measuring value multiplied by a weighting factor. The weighting factor is a function of the distance between the element and the measuring path along which the measuring value is determined. A calculation method of this kind enables fast on-line calculation of an absorption distribution and the complete reconstruction of the absorption distribution is laid down in a hardware circuit. Complex operations such as F.F.T., convolution and interpolation are not required.

REFERENCES:
patent: 4052619 (1977-10-01), Hounsfield
patent: 4066903 (1978-01-01), Le May
patent: 4138611 (1979-02-01), Hounsfield
patent: 4149259 (1979-04-01), Kowalski
patent: 4274140 (1981-06-01), Watson

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