X-ray or gamma ray systems or devices – Beam control – Filter
Patent
1990-10-03
1992-04-21
Howell, Janice A.
X-ray or gamma ray systems or devices
Beam control
Filter
378156, 378158, 359890, G21K 100
Patent
active
051075296
ABSTRACT:
A radiographic equalization apparatus comprises a plurality of juxtaposed disks each having a plurality of unique filtration patterns annularly disposed therearound. The disks are rotated relative to one another to obtain a unique attenuation pattern for correcting for overexposures in an x-ray image.
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Howell Janice A.
Porta David P.
Thomas Jefferson University
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