Method and device for sampling radiation from X-ray machines for

Details Method and device for sampling radiation from X-ray machines for Method and device for sampling radiation from X-ray machines for

1981-10-14

1983-07-05

La Roche, Eugene

X-ray or gamma ray systems or devices

Accessory

Testing or calibration

250337, A61B 600, H05G 100, G01T 111

Patent

active

043922406

ABSTRACT:
A method and a device for sampling a radiation field emitted from an X-ray machine for determining certain operational characteristics of the machine. A cassette container is disposed at a predetermined position relative to a radiation field of the X-ray machine. The cassette container houses a removable holder containing one or more thermo-luminiscent crystals associated with a respective one or more crystal filters supported in the container. The filters have different densities from one another. An X-ray sensitive film is also removably supported under a further plurality of filters, also having different densities from one another, whereby the film and the crystals are subjected to filtered radiation from the X-ray beam and undergo a physical change proportional to the strength of radiation received so that analysis of same will provide a determination of the size of the radiation field, the dose of radiation, the filtration of the X-ray radiation emitting from the machine, and the operating kilovoltage applied to an X-ray source of the machine.

REFERENCES:
patent: 2258593 (1941-10-01), Black
patent: 3582653 (1971-06-01), Howard
patent: 4303857 (1981-12-01), Inoue et al.
Lin, P.-J. P., "Penetration Quality Measurement for Standardization of Radiographic Image Quality," Medical Physics, vol. 2, No. 1, Jan./Feb. 1975.
Langmead et al., "A TLD System Based on Lithium Borate for the Measurement of Doses to Patients Undergoing Medical Irradiation," Phys. Med. Biol., vol. 21, No. 1, pp. 39-51, 1976.

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