Source filter for radiographic imaging

Details Source filter for radiographic imaging Source filter for radiographic imaging

1989-03-10

1990-09-11

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Filter

2503851, 378 99, G21K 300

Patent

active

049568590

ABSTRACT:
A system for analyzing biological structures by photon absorptiometry is disclosed, including a radiation source emitting photons and at least one source filter which operates to reduce the emission of high energy photons, thereby creating a sharp drop-off at the high end of the detected energy spectrum. The filter radiation is received by a detector which determines the spatial intensity of the radiation over the image area and preferably has a characteristics response which is relatively insensitive to low energy photons, such that the source filter and detector cooperate to measure the intensity of photons within a narrowed band of energy levels.

REFERENCES:
patent: 3715588 (1973-02-01), Rose
patent: 3772521 (1973-11-01), Perez-Mendez
"Balanced Filters for Silver K.alpha.X-Rays", Berman et al., Review of Scientific Instruments, vol. 41, #6, 6/1970, pp. 870-873.
"Definition and Measurement of Means of Filtered X Radiation", Grudskii et al., Raduim Institute Leningrad, Aug. 1974.

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