Thermoacoustic computed tomography using a conventional linear transducer array
- 22 April 2003
- journal article
- Published by Wiley in Medical Physics
- Vol. 30 (5) , 856-860
- https://doi.org/10.1118/1.1565340
Abstract
We report on methodology for employing a conventional linear transducer array as a thermoacoustic detector in a thermoacoustic computed tomography (TCT) device, which has been designed for imaging small animals, e.g., athymic nude mice. We tested this concept using a 5 MHz, 128-element linear array (Acuson model L538). Thermoacoustic emissions were induced in a tissue-mimicking phantom using a Nd:YAg laser, operated at 1064 nm. Two-dimensional, axial "slice" images were formed using a filtered-backprojection algorithm. In-plane spatial resolution was measured as better than 200 microns with a slice thickness of 1.5 mm (full width at half maximum). The same detector, when operated as a conventional phased array, produced conventional ultrasound images in perfect registration with the TCT images.Keywords
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