Title :
Towards detecting surgical clips in 3D ultrasound for target localization in radiation therapy: A study on tissue phantoms
Author :
Karimaghaloo, Zahra ; Shrawane, Prasad ; Abolmaesumi, Purang ; Fichtinger, Gabor ; Rohling, Robert
Author_Institution :
Department of Electrical and Computer Engineering, Queens University, Kingston, ON, Canada, K7L 3N6
Abstract :
A study is performed to measure the visibility of small surgical clips in 3D ultrasound volumes of a phantom as the first step towards using such clips as fiducial markers in radiation therapy. Visibility is calculated as the contrast to noise ratio of the echo from the clip to the background. The appearance of a resonance tail is also calculated using a moment analysis. Contrast is found to be high and mostly independent of material and size of the clip. All clips are visible, but the length of the tail is found to be dependent on clip orientation to the ultrasound beam. The consistent visibility of the clips suggests they are suitable as fiducial markers in ultrasound and the dependency of the resonance tail on orientation provides an opportunity to distinguish clips from other specular reflectors.
Keywords :
Biomedical applications of radiation; Imaging phantoms; Performance evaluation; Radiation detectors; Resonance; Surgery; Tail; Ultrasonic imaging; Ultrasonic variables measurement; Volume measurement; Equipment Design; Equipment Failure Analysis; Humans; Image Enhancement; Imaging, Three-Dimensional; Phantoms, Imaging; Radiotherapy, Computer-Assisted; Reproducibility of Results; Sensitivity and Specificity; Surgical Instruments; Ultrasonography;
Conference_Titel :
Engineering in Medicine and Biology Society, 2008. EMBS 2008. 30th Annual International Conference of the IEEE
Conference_Location :
Vancouver, BC
Print_ISBN :
978-1-4244-1814-5
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2008.4650406
