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.
|Title of host publication||17th Annual Workshop on Circuits|
|Place of Publication||Utrecht|
|Number of pages||7|
|Publication status||Published - 23 Nov 2006|
|Event||17th Annual Workshop on Circuits, Systems and Signal Processing, ProRISC 2006 - Veldhoven, Netherlands|
Duration: 23 Nov 2006 → 24 Nov 2006
Conference number: 17
|Workshop||17th Annual Workshop on Circuits, Systems and Signal Processing, ProRISC 2006|
|Abbreviated title||ProRISC 2006|
|Period||23/11/06 → 24/11/06|
Willemink, R., Slump, C. H., & van der Heijden, F. (2006). On image quality enhancement in photoacoustic image reconstruction by motion compensation. In 17th Annual Workshop on Circuits (pp. 216-222). Utrecht: STW.