Title :
Precise blood flow imaging in ultrasonic power Doppler imaging based on motion compensation
Author :
Yoshikawa, Hideki ; Azuma, Takashi ; Kawabata, Ken-ichi
Author_Institution :
Central Res. Lab., Hitachi, Ltd., Tokyo, Japan
Abstract :
A novel method of motion compensated power Doppler imaging (MC-PDI) has been investigated and found to improve the spatial and contrast resolution of ultrasonic power Doppler imaging (PDI), which is widely used to visualize blood flow velocity. The tissue motion in neighboring frames sequentially obtained is measured with a block matching technique, and then several power Doppler (PD) images are averaged compensating for deviation in the tissue. Image quality with and without motion compensation (MC) was quantitatively evaluated using a Doppler phantom. The feasibility of MC-PDI was demonstrated using a tumor in rabbit liver. The resulting images indicated that slight liver motion could be effectively reduced and the blood vessels could be clearly imaged without blurring in MC-PDI.
Keywords :
Doppler measurement; biological tissues; biomedical ultrasonics; blood vessels; haemodynamics; image matching; image resolution; liver; medical image processing; motion compensation; phantoms; physiological models; tumours; Doppler phantom; block matching technique; blood vessels; contrast resolution; image quality; motion compensation; precise blood flow imaging; rabbit liver; spatial resolution; tissue motion; tumor; ultrasonic power Doppler imaging; Acoustics; Biomedical imaging; Blood vessels; Doppler effect; Electron tubes; Tumors;
Conference_Titel :
Ultrasonics Symposium (IUS), 2010 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4577-0382-9
DOI :
10.1109/ULTSYM.2010.5935469
