Advanced subtraction angiography: mask selection and image registration

Author

Beier, J. ; Oswald, H. ; Fleck, E.

Author_Institution

German Heart Inst., Berlin, Germany

fYear

1994

fDate

25-28 Sep 1994

Firstpage

105

Lastpage

108

Abstract

Conventional DSA in cardioangiography is hampered by the rapid and irregular heart movement. Thus, extended subtraction artefacts occur due to the bad congruence of corresponding structures. A native sequence of one heart cycle serves as a pool of mask images. The ECG signal is used to find the corresponding mask image. An image registration algorithm was developed to estimate displacements in numerous (>6000) local image regions. The resulting motion pattern is used to compute a new warped image with maximum congruence. This calculated image becomes the new mask in the subsequent subtraction. The algorithm works fully automatically and does not need any interaction like the demarcation of landmarks. Better assessment of the coronary vessels and the ventricle with reduced artefacts is the diagnostic benefit of this image enhancement

Keywords

angiocardiography; diagnostic radiography; image enhancement; image registration; medical image processing; ECG signal; advanced subtraction angiography; cardioangiography; coronary vessels assessment; diagnostic benefit; displacements estimation; heart cycle; image registration algorithm; local image regions; mask selection; medical diagnostic imaging; rapid irregular heart movement; reduced artefacts; ventricle; Angiography; Cardiology; Electrocardiography; Extremities; Head; Heart; Image enhancement; Image processing; Image registration; X-ray imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 1994

Conference_Location

Bethesda, MD

Print_ISBN

0-8186-6570-X

Type

conf

DOI

10.1109/CIC.1994.470238

Filename

470238