Title :
Enhancement of organ of interest via background subtraction in cone beam rotational angiocardiogram
Author :
Chen, Mingqing ; Zheng, Yefeng ; Mueller, Kerstin ; Rohkohl, Christopher ; Lauritsch, Guenter ; Boese, Jan ; Comaniciu, Dorin
Author_Institution :
Image Analytics & Inf., Siemens Corp. Res., Princeton, NY, USA
Abstract :
The real time X-ray angiography based on C-arm cone beam system is the workhorse imaging modality for interventional cardiac procedures. These images are two-dimensional (2D) projections of three dimensional (3D) objects along the X-ray direction. The organ of interest (OOI), such as left ventricle (LV) endocardium, in the projection image is superimposed with other anatomical structures and often has low contrast. In this study, a novel approach is proposed to isolate the OOI in projection images by subtracting with a background image, which is generated by numerical projection of 3D tomographic image with OOI masked out. Study based on one patient and one pig image is taken. About two to three-fold increase in the contrast-to-noise ratio (CNR) is achieved for LV endocardium, compared to an unprocessed image.
Keywords :
angiocardiography; biomedical optical imaging; diagnostic radiography; medical image processing; numerical analysis; 3D tomographic imaging; C-arm cone beam system; X-ray direction; anatomical structures; background imaging; background subtraction; cone beam rotational angiocardiogram; contrast-noise ratio; interventional cardiac procedures; left ventricle endocardium; numerical projection; organ interest enhancement; projection imaging; real time X-ray angiography; three dimensional objects; two-dimensional projections; workhorse imaging modality; Angiography; Attenuation; Computed tomography; Image reconstruction; X-ray imaging; CBCT; Reprojection; SART; Subtraction; Ventricle;
Conference_Titel :
Biomedical Imaging (ISBI), 2012 9th IEEE International Symposium on
Conference_Location :
Barcelona
Print_ISBN :
978-1-4577-1857-1
DOI :
10.1109/ISBI.2012.6235625