Registered image subtraction for CT-, MR- and coronary angiography

European Radiology
J BeierR Felix

Abstract

Conventional post-processing of digital subtraction angiography (DSA) by 3D spiral CT, 3D MRI and 2D DSA is often hampered by extended artefacts due to patient movements during examination. In this paper an image registration procedure prior to the digital subtraction is introduced allowing an enhanced visualization of the contrast agent. The object displacement is detected by analysis of image deformations in small local regions. The motion pattern is used to compute a new synthetic mask of maximum congruence with the contrast medium image. This new mask image is then used in the subsequent subtraction. The algorithm works fully automatically and does not need any interactive placement of landmarks. Results obtained from subtraction of uncorrected and corrected sequences were compared with each other. The registration procedure provided good results in the suppression of subtraction artefacts and in the enhancement of vascular structures. Results are presented from subtraction of 2D and 3D data from CTA, MR mammography and coronary angiography.

Citations

Apr 14, 2005·Journal of Digital Imaging·Ansgar MalichWerner A Kaiser
Oct 27, 2004·AJR. American Journal of Roentgenology·Pierre-Alexandre PolettiGregory Khatchatourov
Apr 4, 2002·Radiology·Thomas C LauensteinJörg F Debatin
Dec 20, 2008·Computerized Medical Imaging and Graphics : the Official Journal of the Computerized Medical Imaging Society·Giuseppe PotenteSara Savelli
Jun 28, 2005·Computerized Medical Imaging and Graphics : the Official Journal of the Computerized Medical Imaging Society·David LevinPiotr Slomka
Nov 20, 1998·The Journal of Veterinary Medical Science·K YamadaT Hirose

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