Fiducial positioning cup

Details Fiducial positioning cup Fiducial positioning cup

1997-12-08

2000-01-04

Lateef, Marvin M.

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

606130, 600426, A61B 500

Patent

active

06011987&

ABSTRACT:
A fiducial positioning cup (86) has a hemispherical well (92) in its top and a central bore (94) from a bottom of the hemispherical well (92) to a base of the positioning cup (86). The fiducial cup (86) is then attached to the skin (88) of a patient. A needle (110) is passed through the fiducial positioning cup (86) to mark an area of the patient's skin (88) with a tattoo (112). Fiducials (84) are secured in the fiducial positioning cups (86). Magnetic resonance or other diagnostic images are taken. Once the images are taken, the fiducials (84) and fiducial positioning cups (86) are removed. The tattoo mark (112) remains. The fiducial positioning cups (86) are reattached when a stereotactic procedure is to be performed. The needle (110) is passed through the fiducial cups (86) and a tip of the needle (110) is aligned with the tattooed mark (112) on the patient's skin (88). The fiducial cup (86) is then lowered and centered over the tattooed mark (112). A stereotactic wand (36) is aligned with the magnetic resonance image by placing a tip (42) of the wand (36) in the fiducial cups (86) and emitting signals. The stereotactic system decodes the signals to identify where the tip (42) of the wand (36) is on the magnetic resonance image.

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Article entitled: "Computer-Assisted Coregistration of Multislice SPECT and MR Brain Images by Fixed External Fiducials," by Robert T. Malison et al. Published in the Journal of Computer Assisted Tomography, vol. 17, No. 6, 1993.

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