A sixteen-channel phased array driving system for ultrasound hyperthermia

Author

Lu, Bing-Yuh ; Win-Li Lin ; Chen, Yung-Yaw ; Kuo, Te-Son ; Wang, Cheng-Yi

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

2

fYear

1997

fDate

30 Oct-2 Nov 1997

Firstpage

822

Abstract

A sixteen-channel driving system for ultrasound hyperthermia has been designed and constructed. This driving system was divided into two modules. Each module contained one main board and eight driving cards. The two modules were connected with a 64-wired flat cable. The main board had nine slots for the driving cards. Each driving card included phase shifter, amplitude controller, power amplifier and power switch. The serial port of a single-chip microprocessor (ATMEL 89C51) on the main board of the master module received the driving system instructions from PC. With these system instructions, the program in PC could select which channels would be turned-on or turned-off. Then, PC could control the power level and relative phase of turned-on channels. The bandwidth, power step, phase step, maximum output power, power stability within 100 minutes and relative phase error for each channel are 0.5-3.0 MHz, 256, 16, 18 Watts, 10% and 10%, respectively. This system can be extended if needed. Above all, this power driving system can be employed in multi-element transducers for ultrasound hyperthermia and other high power medical therapy techniques

Keywords

biomedical electronics; biomedical ultrasonics; computerised instrumentation; hyperthermia; ultrasonic arrays; 0.5 to 3.0 MHz; 100 min; 18 W; 64-wired flat cable; ATMEL 89C51; amplitude controller; bandwidth; driving cards; high power medical therapy; maximum output power; multielement transducers; phase shifter; phase step; power amplifier; power stability; power step; power switch; relative phase error; single-chip microprocessor serial port; sixteen-channel phased array driving system; ultrasound hyperthermia; Bandwidth; Biomedical transducers; Hyperthermia; Microprocessors; Phase shifters; Phased arrays; Power amplifiers; Power generation; Stability; Ultrasonic imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1997. Proceedings of the 19th Annual International Conference of the IEEE

Conference_Location

Chicago, IL

ISSN

1094-687X

Print_ISBN

0-7803-4262-3

Type

conf

DOI

10.1109/IEMBS.1997.757778

Filename

757778