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ST: Fachverband Strahlen- und Medizinphysik

ST 3: DPG meets DGMP: Herzbildgebung

ST 3.2: Hauptvortrag

Dienstag, 28. März 2017, 17:15–17:45, JUR 1

Cardiac CT — •Marc Kachelrieß — Deutsches Krebsforschungszentrum (DKFZ)

Volumetric heart imaging with high isotropic spatial resolution (0.3 mm) and high temporal resolution (63 ms), with subsecond scan times (0.2 s) for the whole heart, seeing the coronaries, quantifying their lumen, characterizing calcified and vulnerable plaques, detecting coronary stenoses with highest sensitivity and specificity, computing functional values such as ejection fraction, myocardial perfusion or fractional flow reserve while requiring only a small amount of contrast agent? This is routinely possible with cardiac CT.

This lecture highlights the technology of high end diagnostic CT systems wrt their application in cardiac imaging. Hardware technology, such as x-ray sources and detectors, such as spectral shaping and protocol design is discussed, as well as state-of-the art reconstruction software technology. Thereby, it is shown, why the x-ray dose values are so low (1 to 2 mSv), today.

The presentation further discusses future developments such as iterative image reconstruction combined with motion compensation techniques to push the temporal resolution beyond the theoretical limit, and to reduce dose.