The photon‐counting detector (PCD) system was developed to overcome the limitations
of traditional energy‐integrating detectors (EIDs) in computed tomography. This technique
results in a higher contrast‐to‐noise ratio (CNR), better spatial resolution, and
additionally provides detector‐based spectral information. Spectral imaging is based
on the acquisition and detection of different photon energy spectra. By using spectral
information, image quality (IQ) can be improved, and materials can be distinguished;
furthermore, their quantity and concentration can be determined. Spectral data‐based
parameters and reconstructions can be utilized in calcification measurement, luminal
stenosis assessment, and myocardium characterization. The aim of this review is to
summarize the spectral imaging applications of PCD computed tomography in the assessment
of heart diseases.
