Ultrasonic imaging of biopsy needle

Details Ultrasonic imaging of biopsy needle Ultrasonic imaging of biopsy needle

1990-04-18

1992-03-17

Jaworski, Francis

Surgery

Truss

Pad

A61B 812

Patent

active

050959107

ABSTRACT:
A system for imaging a biopsy needle with ultrasound is shown in which the needle tip elicits a Doppler response through controlled reciprocation of the needle tip. In a preferred embodiment the biopsy needle includes a hollow cannula which carries a removable stylet. Means for reciprocating the stylet is coupled to the proximal end of the stylet, and the distal tip of the stylet is reciprocated at the distal end of the cannula. This motion is detected through Doppler interrogation of the body region at which the biopsy is to be performed, and the Doppler response of the needle tip in the image of the body region allows the needle tip to be monitored as it approaches the tissue to be biopsied.

REFERENCES:
patent: 3556079 (1971-01-01), Omizo
patent: 3570476 (1971-03-01), Oregg
patent: 3805787 (1974-04-01), Banbo
patent: 4249538 (1981-02-01), Vilkomerson et al.
patent: 4407294 (1983-10-01), Vilkomerson
patent: 4428379 (1984-01-01), Robbins et al.
patent: 4431006 (1984-02-01), Trimmer et al.
patent: 4816018 (1989-03-01), Porisi
"Motion Marking in Color Doppler Ultrasound Needle and Catheter Visualization", T. Kurohiji et al., J Ultrasound Med 9:243-45, 1990.

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