1. Ultrasound-transmission parameter imaging in a photoacoustic imager
- Author
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Jose, J., Willemink, Rene, Resink, Steffen, Maalderink, T., van Hespen, Johannes C.G., van Leeuwen, Ton, Manohar, Srirang, Depeursinge, Christian D., Vitkin, I. Alex, Faculty of Science and Technology, and Biomedical Photonic Imaging
- Subjects
Materials science ,business.industry ,METIS-259634 ,Detector ,Ultrasound ,Physics::Medical Physics ,Sample (graphics) ,Imaging phantom ,IR-77736 ,Photoacoustic Doppler effect ,Optics ,(110.7170) Ultrasound ,(110.5120) Photoacoustic imaging ,Tomography ,business ,Photoacoustic spectroscopy ,Acoustic attenuation - Abstract
We present a 'hybrid' imaging system, which can image both optical absorption properties and acoustic transmission properties of an object in a two-dimensional slice using a computed tomography photoacoustic imager. The ultrasound transmission measurement method uses a strong absorber of light which is placed in the path of the light illuminating the sample. This acts as a source of ultrasound, whose interaction with the sample can be measured at the far-end of the sample using the same ultrasound detector used for photoacoustics. Such measurements are made at various angles around the sample in a computerized tomography approach. The ultrasound transients at the multi-element detector at all projections are analyzed for both times-of-arrival and amplitude. Using a fan-beam projection reconstruction algorithm we obtain hybrid images of optical absorption, speed-of-sound and acoustic attenuation. We validate the method on an appropriate phantom
- Published
- 2009