By Patricia M. Carrascosa, Ricardo C. Cury, Mario J. García, Jonathon A. Leipsic

This is the 1st textbook in DECT focussing in particular at the cardiovascular box. DECT used to be constructed a long time in the past yet has lately unfold its scientific application. Many new purposes were constructed over the past years and the cardiovascular process has benefited from those advances. New protocols might be utilized in the close to destiny so as to aid to optimize effects got previously with unmarried power CT, similar to a extra special quantification of coronary artery stenosis utilizing both varied monochromatic degrees or fabric decomposition, aid of beam hardening artifacts in perfusion experiences and optimizing endovenous distinction, between others.​

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There is also a fixed energy partition between layers so only one low/high peak tube voltage combination is possible. Applications in Cardiovascular Imaging There is no scientific data published yet on the performance of dual layer detector CT in the clinical arena. However, perfect spatial and temporal alignment and projection-based decomposition makes it ideal for generating images of the heart, with minimal motion and beam hardening artifacts. 2. Myocardial perfusion is an obvious cardiovascular application because perfusion defects should be more conspicuous in low energy virtual monochromatic images and iodine maps compared to conventional single energy imaging [8, 9].

Dual-energy CT is a pseudo x-ray energy resolving tomographic technique, where two x-ray beams with different energies are used simultaneously for scanning. As the x-ray attenuation by a material is energy dependent, additional spectral information acquired from the extra x-ray beam permits a better material characterization compared to single-energy CT. Although the concept of dual-energy CT was introduced in the early days of CT, the clinical application of this technique has not been widely adopted until recently due to the technical limitations of CT technology.

Hounsfield GN. Computerized transverse axial scanning (tomography): part I. Description of system. Br J Radiol. 1973;46:1016–22. 5. Johnson TRC. Dual-energy CT: general principles. AJR Am J Roentgenol. 2012;199:S3–8. 44 P. Rajiah and S. Halliburton 6. Schlomka JP, Roessl E, Dorscheid R, et al. Experimental feasibility of multi-energy photoncounting K-edge imaging in pre-clinical computed tomography. Phys Med Biol. 2008;53(15):4031–47. 7. Roessl E, Proksa R. K-edge imaging in x-ray computed tomography using multi-bin photon counting detectors.

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