Dynamic cardiac volume imaging using area detectors

Herbert Bruder; Arne Hoelzel; Karl Stierstorfer; Annabella Rauscher; Thomas Flohr

doi:10.1117/12.480243

15 May 2003 Dynamic cardiac volume imaging using area detectors

Herbert Bruder, Arne Hoelzel, Karl Stierstorfer, Annabella Rauscher, Thomas Flohr

Proceedings Volume 5032, Medical Imaging 2003: Image Processing; (2003) https://doi.org/10.1117/12.480243
Event: Medical Imaging 2003, 2003, San Diego, California, United States

Abstract

We present a reconstruction scheme for dynamic cardiac volume imaging using Area Detector Computed Tomography (CT) named Multi-Sector Cardiac Volume Reconstruction (MCVR) which is based on a 3D-backprojection of the Feldkamp-type. It is intended for circular scanning using area detectors covering the whole heart volume, but the method can easily be extended to cardiac spiral imaging using multi-slice CT. In cardiac imaging with multi-slice CT continuous data acquisition combined with the parallel recording of the patient's ECG enables retrospective gating of data segments for image reconstruction. Using consecutive heart cycles MCVR identifies complementary and time consistent projection data segments ≤ π using temporal information of the ECG. After a row by row parallel rebinning and temporal rebinning the projection data have to be filtered using conventional convolution kernels and finally reconstructed to image space using a 3D-backprojection. A dynamic anthropomorphic computer model of the human heart was developed in order to validate the MCVR approach. A 256-slice detector system with 0.5mm slice collimation was simulated operating in a circular scanning mode at a gantry rotation time of 330ms and compared to state-of-the-art 16-slice technology. At enddiastole the coronary anatomy can be visualized with excellent image quality. Although an area detector with large cone angling covering the entire heart volume was used no cone-artifacts could be observed. Using a 2-sector approach a nearly motion free 3D visualization of the heart chambers was obtained even at endsystole.

Citation Download Citation

Herbert Bruder, Arne Hoelzel, Karl Stierstorfer, Annabella Rauscher, and Thomas Flohr "Dynamic cardiac volume imaging using area detectors", Proc. SPIE 5032, Medical Imaging 2003: Image Processing, (15 May 2003); https://doi.org/10.1117/12.480243

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