Ophthalmic A-scan ultrasonic measuring instrument based on MSP430

Author

Chen, Juan ; Zhao, Xingqun

Author_Institution

Dept. of Biomed. Eng., Southeast Univ., Nanjing, China

Volume

3

fYear

2010

fDate

16-18 Oct. 2010

Firstpage

982

Lastpage

985

Abstract

This paper schemed out an ophthalmic high frequency A-scan ultrasonic instrument to measure corneal thickness and ocular axial length, using pulse reflection principle and double counting method. A special ultrasonic high frequency transducer was designed to get higher resolution. In addition, differential circuit reduced the pulse width, thus improved the accuracy. From the results of comparative experiments with Orbscan II and general A-ultrasonic instrument, the device achieved its good goals.

Keywords

biomedical measurement; biomedical transducers; biomedical ultrasonics; eye; ultrasonic transducers; MSP430; Orbscan II; corneal thickness; differential circuit; double counting method; ocular axial length; ophthalmic A-scan ultrasonic measuring instrument; pulse reflection principle; pulse width; ultrasonic high frequency transducer; Acoustics; Cornea; Probes; Thickness measurement; Transducers; Ultrasonic variables measurement; CPLD; MSP430 singlechip; corneal thickness; ocular axial length;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Engineering and Informatics (BMEI), 2010 3rd International Conference on

Conference_Location

Yantai

Print_ISBN

978-1-4244-6495-1

Type

conf

DOI

10.1109/BMEI.2010.5639303

Filename

5639303