X-ray marker device

Details X-ray marker device X-ray marker device

1983-05-18

1985-09-24

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

2482975, 378163, 403374, A61B 612

Patent

active

045430918

ABSTRACT:
For pre-operative radiography preparatory to stereotaxic lateral extradural disc puncture (e.g. as disclosed in U.S. Pat. No. 3,941,127) the patient is placed on his side and a radiographic film is exposed from which the surgeon calculates position and angle of needle approach to the disc before the actual operation begins. An X-ray opaque marker device similar to a ruler is located parallel and adjacent to the patient at the level of the midsaggital plane. Markings and numbers on the marker device show on the exposed film. With prolonged X-ray exposure, the image of the marker may be "burned". The present device provides a series of radiopaque shields which may be interposed between the marker and the film to reduce burn-out of the image of the marker on the film. A convenient stand supports and stores the marker and one or more shields so that they may be individually and selectively raised and turned into operative position.

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patent: 4373789 (1983-02-01), Roberts
patent: 4421108 (1983-12-01), Cabrera et al.

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