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Review
. 2009 Nov-Dec;3(6):403-8.
doi: 10.1016/j.jcct.2009.07.003. Epub 2009 Jul 30.

What are the basic concepts of temporal, contrast, and spatial resolution in cardiac CT?

Eugene Lin  1 , Adam Alessio
Affiliations
Review

What are the basic concepts of temporal, contrast, and spatial resolution in cardiac CT?

Eugene Lin et al. J Cardiovasc Comput Tomogr. 2009 Nov-Dec.

Abstract

An imaging instrument can be characterized by its spatial resolution, contrast resolution, and temporal resolution. The capabilities of computed tomography (CT) relative to other cardiac imaging modalities can be understood in these terms. The purpose of this review is to characterize the spatial, contrast, and temporal resolutions of cardiac CT in practical terms.

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Figures

Figure 1
Figure 1
Linear attenuation coefficient versus x-ray energy. For CT imaging, the body is imaged with x-rays in the range of 20–140 keV. In this range, soft tissues have little variation in their attenuation coefficients, leading to low soft tissue contrast and the need for contrast agents such as iodine.
Figure 2
Figure 2
Single-segment versus multisegment reconstruction. In single-segment reconstruction, an image is reconstructed from data from a prescribed time range in a single R-R interval. In multisegment reconstruction, the same image would be reconstructed from data from the same phase of multiple cardiac cycles, with a smaller time range (higher temporal resolution) in each R-R interval than with single-segment reconstruction. In the specific case shown in this figure, the temporal resolution would be increased by a factor of 3 with multisegment reconstruction.
See this image and copyright information in PMC

References

    1. Nissen SE, Yock P. Intravascular ultrasound: novel pathophysiological insights and current clinical applications. Circulation. 2001;103:604–16. - PubMed
    1. Garcia EV, Faber TL. New trends in camera and software technology in nuclear cardiology. Cardiol Clin. 2009;27:227–36. - PubMed
    1. Horiguchi J, Fujioka C, Kiguchi M, Shen Y, Althoff CE, Yamamoto H, Ito K. Soft and intermediate plaques in coronary arteries: how accurately can we measure CT attenuation using 64-MDCT? AJR Am J Roentgenol. 2007;189:981–8. - PubMed
    1. Kalra MK, Brady TJ. Current status and future directions in technical developments of cardiac computed tomography. J Cardiovasc Comput Tomogr. 2008;2:71–80. - PubMed
    1. Gupta R, Cheung AC, Bartling SH, Lisauskas J, Grasruck M, Leidecker C, Schmidt B, Flohr T, Brady TJ. Flat-panel volume CT: fundamental principles, technology, and applications. Radiographics. 2008;28:2009–22. - PubMed