Thermoacoustic Tomography - Ultrasound Attenuation Artifacts

Author

Patch, S.K. ; Haltmeier, M.

Author_Institution

Dept. of Phys., Wisconsin Univ. Milwaukee, WI

Volume

4

fYear

2006

fDate

Oct. 29 2006-Nov. 1 2006

Firstpage

2604

Lastpage

2606

Abstract

Thermoacoustic computerized tomography (TCT) is a hybrid imaging technique exploiting the thermoacoustic effect. TCT has many parallels with X-ray CT, including frequency dependent attenuation of the measured signal. However, the nature of these attenuation phenomena is nearly opposite: X-ray beams "harden", whereas ultrasound pulses "soften" An analytic formula for an attenuated TCT pulse generat.ed by a homogeneous spherical inclusion is presented. Resulting artifacts in reconstructed X-ray CT and TCT images are compared and contrasted.

Keywords

bioacoustics; computerised tomography; thermoacoustics; ultrasonic absorption; attenuated TCT pulse; frequency dependent attenuation; homogeneous spherical inclusion; hybrid imaging technique; thermoacoustic computerized tomography; thermoacoustic effect; ultrasound attenuation artifacts; ultrasound pulses; Attenuation measurement; Computed tomography; Frequency dependence; Frequency measurement; Image reconstruction; Optical imaging; Pulse generation; Ultrasonic imaging; Ultrasonic variables measurement; X-ray imaging; Radon transform; artifacts; attenuation; beam hardening; biomedical acoustic imaging; inverse problems; optoacoustic; photoacoustic; thermoacoustic;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2006. IEEE

Conference_Location

San Diego, CA

ISSN

1095-7863

Print_ISBN

1-4244-0560-2

Electronic_ISBN

1095-7863

Type

conf

DOI

10.1109/NSSMIC.2006.354441

Filename

4179555