Method and apparatus for reduction of scatter in diagnostic radi

Details Method and apparatus for reduction of scatter in diagnostic radi Method and apparatus for reduction of scatter in diagnostic radi

1977-05-31

1978-06-20

Smith, Alfred E.

Radiant energy

Radiation controlling means

250320, 250445T, G01N 2300

Patent

active

040963918

ABSTRACT:
A method and apparatus are disclosed for reducing scatter in diagnostic radiology and thereby improving image clarity and resolution, particularly in mammography or where abdominal organs are being studied. The method includes the use of a scanning multiple slit arrangement in conjunction with a conventional X-ray generator and imaging modality. A first or upper plate having a plurality of slits is placed between the patient to be X-rayed and the focal spot of an X-ray tube. A second or lower plate having corresponding number of slits, but substantially expanded in scale relative to the first plate, is placed beneath the patient but above the photographic cassette on which the X-ray image is to be recorded. The lower plate may consist of a bifurcated plate structure or a single, thick, slotted plate. The upper and lower slit structures are coupled together and are mechanically driven by a suitable drive mechanism to rapidly scan the patient with a group of separate beams produced by the upper slit plate. The upper and lower slits are maintained in registration with one another so that primary radiation transmitted by the upper slits is also transmitted by the lower slits while scattered radiation from the patient is blocked by the lower plate structure.

REFERENCES:
patent: 1768769 (1930-07-01), Kelley
patent: 3783282 (1974-01-01), Hoppenstein
patent: 3866047 (1975-02-01), Hannsfield
patent: 3944833 (1976-03-01), Hannsfield

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