Image formation in vibro-acoustography with depth-of-field effects

Glauber T. Silva, Alejandro C. Frery, Mostafa Fatemi

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

We study the image formation of vibro-acoustography systems based on a concave sector array transducer taking into account depth-of-field effects. The system point-spread function (PSF) is defined in terms of the acoustic emission of a point-target in response to the dynamic radiation stress of ultrasound. The PSF on the focal plane and the axis of the transducer are presented. To extend the obtained PSF to the 3D-space, we assume it is a separable function in the axial direction and the focal plane of the transducer. In this model, an image is formed through the 3D convolution of the PSF with an object function. Experimental vibro-acoustography images of a breast phantom with lesion-like inclusions were compared with simulated images. Results show that the experimental images are in good agreement with the proposed model.

Original languageEnglish (US)
Pages (from-to)321-327
Number of pages7
JournalComputerized Medical Imaging and Graphics
Volume30
Issue number5
DOIs
StatePublished - Jul 1 2006

Keywords

  • Image formation
  • Point-spread function
  • Vibro-acoustography

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging
  • Computer Vision and Pattern Recognition
  • Health Informatics
  • Computer Graphics and Computer-Aided Design

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