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Proceedings Paper

The ACUSITT ultrasonic ablator: the first steerable needle with an integrated interventional tool
Author(s): E. Clif Burdette; D. Caleb Rucker; Punit Prakash; Chris J. Diederich; Jordon M. Croom; Clyde Clarke; Philipp Stolka; Titania Juang; Emad M. Boctor; Robert J. Webster III
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Paper Abstract

Steerability in percutaneous medical devices is highly desirable, enabling a needle or needle-like instrument to avoid sensitive structures (e.g. nerves or blood vessels), access obstructed anatomical targets, and compensate for the inevitable errors induced by registration accuracy thresholds and tissue deformation during insertion. Thus, mechanisms for needle steering have been of great interest in the engineering community in the past few years, and several have been proposed. While many interventional applications have been hypothesized for steerable needles (essentially anything deliverable via a regular needle), none have yet been demonstrated as far as the authors are aware. Instead, prior studies have focused on model validation, control, and accuracy assessment. In this paper, we present the first integrated steerable needle-interventional device. The ACUSITT integrates a multi-tube steerable Active Cannula (AC) with an Ultrasonic Interstitial Thermal Therapy ablator (USITT) to create a steerable percutaneous device that can deliver a spatially and temporally controllable (both mechanically and electronically) thermal dose profile. We present our initial experiments toward applying the ACUSITT to treat large liver tumors through a single entry point. This involves repositioning the ablator tip to several different locations, without withdrawing it from the liver capsule, under 3D Ultrasound image guidance. In our experiments, the ACUSITT was deployed to three positions, each 2cm apart in a conical pattern to demonstrate the feasibility of ablating large liver tumors 7cm in diameter without multiple parenchyma punctures.

Paper Details

Date Published: 12 March 2010
PDF: 10 pages
Proc. SPIE 7629, Medical Imaging 2010: Ultrasonic Imaging, Tomography, and Therapy, 76290V (12 March 2010); doi: 10.1117/12.845972
Show Author Affiliations
E. Clif Burdette, Acoustic MedSystems, Inc. (United States)
D. Caleb Rucker, Vanderbilt Univ. (United States)
Punit Prakash, Univ. of California, San Francisco (United States)
Chris J. Diederich, Univ. of California, San Francisco (United States)
Jordon M. Croom, Vanderbilt Univ. (United States)
Clyde Clarke, The Johns Hopkins Univ. (United States)
Philipp Stolka, The Johns Hopkins Univ. (United States)
Titania Juang, Univ. of California, San Francisco (United States)
Emad M. Boctor, The Johns Hopkins Univ. (United States)
Robert J. Webster III, Vanderbilt Univ. (United States)

Published in SPIE Proceedings Vol. 7629:
Medical Imaging 2010: Ultrasonic Imaging, Tomography, and Therapy
Jan D'hooge; Stephen A. McAleavey, Editor(s)

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