On image quality enhancement in photoacoustic image reconstruction by motion compensation


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Willemink, G.H. and Slump, C.H. and Heijden, F. van der (2006) On image quality enhancement in photoacoustic image reconstruction by motion compensation. In: 17th Annual Workshop on Circuits, 23-24 Nov 2006, Veldhoven, The Netherlands (pp. pp. 216-222).

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Abstract:Photoacoustic (PA) imaging is a relatively
new noninvasive medical imaging modality. It is a tech-
nique which is harmless for the human body and uses
pulsed optical energy. The process is based on the ab-
sorption of the pulse of optical energy by an object leading
to local temperature increases. This temperature distri-
bution leads to the generation of pressure waves, which in
term can be measured outside of the object. The measured
acoustical signals at the boundary of the object can be used
to reconstruct the original energy absorption distribution.
Reconstruction of the absorption distribution involves
back projecting of the ultrasound measurements in some
spatial map. Unexpected movements of the object can dis-
tort this reconstruction and result in blurred images. The
aim of this work is to research a technique that corrects
for these unexpected and a priori unknown movements.
The approach is based on tracking known landmarks in
the received signal. By assuming rigidness of the object
under consideration, the tracking of landmarks in the PA
signal can be used to estimate small translations of the
object during the signal acquisition.
Item Type:Conference or Workshop Item
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:
Link to this item:http://purl.utwente.nl/publications/63885
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