Virtual non-contrast imaging
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Virtual non-contrast imaging is an image post-processing technique used to create 'non-contrast' images of contrast-enhanced scans via the subtraction of iodine. It is an imaging technique unique to dual energy CT.
Virtual non-contrast imaging has the potential to replace the traditional non-contrast CT scan in multiphasic imaging 1, yet the application suitability varies from study to study. Attenuation values are found to yield 'similar readings' to traditional non-contrast studies 1,2; the clinical relevance of these discrepancies is an ongoing area of research.
- 1. Sauter A, Muenzel D, Dangelmaier J et al. Dual-Layer Spectral Computed Tomography: Virtual Non-Contrast in Comparison to True Non-Contrast Images. Eur J Radiol. 2018;104:108-14. doi:10.1016/j.ejrad.2018.05.007 - Pubmed
- 2. Ananthakrishnan L, Rajiah P, Ahn R et al. Spectral Detector CT-Derived Virtual Non-Contrast Images: Comparison of Attenuation Values with Unenhanced CT. Abdom Radiol (NY). 2017;42(3):702-9. doi:10.1007/s00261-016-1036-9 - Pubmed