Heart Chamber Reconstruction from Biplane Angiography
In this chapter we describe an application of the binary tomography technique to routinely acquired biplane cardiac angiograms. The described model-based reconstruction approach aims to recover the 3D shape of the left or right heart chamber from the density profiles of orthogonal biplane ventriculograms. Several geometric and densitometric imaging errors need to be corrected in the clinical data before the moving heart chamber may be reconstructed slice-by-slice and frame-by-frame. The ventricular reconstructions allow for 3D visualization, volume determination, and regional wall motion analysis independently of the gantry setting used for image acquisition. The method has been applied to clinical angiograms and tested in left and right ventricular phantoms yielding a well shape conformity even with few model information. The results indicate that volumes of binary reconstructed ventricles are less projection-dependent compared to volume data derived by purely contour-based methods.
KeywordsRight Ventricular Density Profile Image Intensifier Heart Chamber Epipolar Line
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