학술논문

A magnetic resonance compatible E4D ultrasound probe for motion management of radiation therapy
Document Type
Conference
Source
2017 IEEE International Ultrasonics Symposium (IUS) Ultrasonics Symposium (IUS), 2017 IEEE International. :1-4 Sep, 2017
Subject
Bioengineering
Fields, Waves and Electromagnetics
Signal Processing and Analysis
Probes
Imaging
Cable shielding
Tumors
Ultrasonic imaging
Acoustics
Linear particle accelerator
E4D
matrix array
2D array
real-time three-dimensional
magnetic resonance
MR
radiation therapy
Language
ISSN
1948-5727
Abstract
We developed a magnetic resonance compatible real-time, three-dimensional imaging ultrasound probe for motion management of radiation therapy for liver cancer. The probe contains an 18,000-element, 46.8 mm × 21.5 mm matrix array constructed from three tiled transducer modules with integrated beamforming ASICs. The center frequency and −6 dB fractional bandwidth of the probe was 3.6 MHz and 85 percent respectively. Ferromagnetic materials in the acoustic stack, flex interconnect and electronics boards were greatly minimized for magnetic resonance compatibility. The probe and cable were shielded to minimize the impact of radiofrequency noise on both the ultrasound and magnetic resonance images. The probe's low-profile, side-viewing design allows it to be strapped to a patient so that images may be acquired hands-free. We present simultaneously acquired ultrasound and 3 Tesla magnetic resonance images with minimal artifacts in both images.