Filter arrangement for soft tissue

Details Filter arrangement for soft tissue Filter arrangement for soft tissue

1984-01-06

1987-02-03

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Filter

378159, G21K 300

Patent

active

046413367

ABSTRACT:
The invention relates to a soft tissue filter arrangement in X-ray imaging of a patient's skull by means of a chefalostat, wherein a patient (P) is by means of ear plugs (5) or the like supports preferably fixed relative to imaging coordinates as well as by means of a nasion and/or forehead support (6) set in a determined position and location between an X-ray source (1) and a film (4) or the like imaging medium and wherein the X-ray source is provided with diaphragm (2) for directing X-rays to the patient and restricting them to a proper sized beam (3) for imaging. The arrangement comprises preferably V-shaped filter means (7) whose position relative to the soft tissues of a patient's face in a cross-sectional plane perpendicular to the X-ray beam is adapted to be set on the basis of a distance (D) between said ear plugs (5) or the like supports and said nasion and/or forehead support (6) or on the basis of a patient's skull dimension correlating sufficiently well therewith. The nasion and/or forehead support (6 ) can be preferably provided with control elements and a scale by means of which the control elements (8) of said filter means (7) can be adapted to be controlled for producing an image having optimum patientwise exposure.

REFERENCES:
patent: 3755672 (1973-08-01), Edholm et al.
patent: 4181858 (1980-01-01), Moore
patent: 4347440 (1982-08-01), Haas
"Deutsche Stomatologie", vol. 9, 1969.

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