Publications [#63078] of Patrick D Wolf
Papers Published
- Fronheiser, M.R. and Light, E.D. and Idriss, S.F. and Wolf, P.D. and Smith, S.W., Real-time, 3-D ultrasound with multiple transducer arrays,
IEEE Trans. Ultrason. Ferroelectr. Freq. Control (USA), vol. 53 no. 1
(2006),
pp. 100 - 5
(last updated on 2007/04/14)Abstract:
Modifications were made to a commercial real-time, three-dimensional (3-D) ultrasound system for near simultaneous 3-D scanning with two matrix array transducers. As a first illustration, a transducer cable assembly was modified to incorporate two independent, 3-D intra-cardiac echo catheters, a 7 Fr (2.3 mm O.D.) side scanning catheter and a 14 Fr (4.7 mm O.D) forward viewing catheter with accessory port, each catheter using 85 channels operating at 5 MHz. For applications in treatment of atrial fibrillation, the goal is to place the sideviewing catheter within the coronary sinus to view the whole left atrium, including a pulmonary vein. Meanwhile, the forward-viewing catheter inserted within the left atrium is directed toward the ostium of a pulmonary vein for therapy using the integrated accessory port. Using preloaded, phasing data, the scanner switches between catheters automatically, at the push of a button, with a delay of about 1 second, so that the clinician can view the therapy catheter with the coronary sinus catheter and vice versa. Preliminary imaging studies in a tissue phantom and in vivo show that our system successfully guided the forward-viewing catheter toward a target while being imaged with the sideviewing catheter. The forward-viewing catheter then was activated to monitor the target while we mimicked therapy delivery. In the future, the system will switch between 3-D probes on a line-by-line basis and display both volumes simultaneouslyKeywords:
biological tissues;biomedical transducers;catheters;echocardiography;patient treatment;phantoms;ultrasonic transducer arrays;