Evaluation of 3D point spread function of a semi-ellipsoidal ultrasound computer tomography system

Author

Ruiter, N.V. ; Dapp, R. ; Zapf, M. ; Gemmeke, H.

Author_Institution

Inst. for Data Process. & Electron., Karlsruhe Inst. of Technol., Karlsruhe, Germany

fYear

2011

fDate

18-21 Oct. 2011

Firstpage

242

Lastpage

245

Abstract

The design of 3DUSCT II was optimized with the aim of nearly isotropic and approx. spatially invariant 3D point spread function (PSF). To evaluate experimentally the 3DPSF, a thin wire was twisted into an irregular helix and imaged with the USCT system. The PSF was measured at 55 points along the wire as 2D profiles of the full width at half maximum (FWHM) in a plane perpendicular to the local direction of the thread. The mean FWHM over all profiles was 0.66 mm. The standard deviation (STD) of the FWHM profiles as measure of the isotropy had a mean of 0.18 mm. The variability of the mean FWHM over the points shows no systematic trend over the imaged space.

Keywords

acoustic tomography; biomedical ultrasonics; cancer; computerised tomography; medical image processing; transfer functions; 3D point spread function; 3DUSCT II design optimisation; USCT imaging; approximately spatially invariant 3D PSF; irregular helical wire; nearly isotropic 3D PSF; semiellipsoidal ultrasound computer tomography system; Apertures; Breast; Image reconstruction; Imaging; Transducers; Ultrasonic imaging; Wires;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2011 IEEE International

Conference_Location

Orlando, FL

ISSN

1948-5719

Print_ISBN

978-1-4577-1253-1

Type

conf

DOI

10.1109/ULTSYM.2011.0059

Filename

6293524