AI Article Synopsis
- The study aimed to compare the attenuation values between true non-contrast images (TNC) and virtual non-contrast images (VNC) obtained from two types of dual-energy CT scans, tbDECT and dsDECT.
- Involving 62 patients, the research analyzed the attenuation of various intra-abdominal organs, revealing that over half of the comparisons showed significant differences in attenuation values between TNC and VNC.
- The findings concluded that VNCs from both DECT methods cannot effectively substitute TNCs due to notable discrepancies in attenuation values, making them less reliable for certain medical assessments.
Article Abstract
Purpose: To assess the magnitude of differences between attenuation values of the true non-contrast image (TNC) and virtual non-contrast image (VNC) derived from twin-beam dual-energy CT (tbDECT) and dual-source DECT (dsDECT).
Materials And Methods: This retrospective study included 62 patients who underwent liver dynamic DECT with tbDECT ( = 32) or dsDECT ( = 30). Arterial VNC (AVNC), portal VNC (PVNC), and delayed VNC (DVNC) were reconstructed using multiphasic DECT. Attenuation values of multiple intra-abdominal organs ( = 11) on TNCs were subsequently compared to those on multiphasic VNCs. Further, we investigated the percentage of cases with an absolute difference between TNC and VNC of ≤ 10 Hounsfield units (HU).
Results: For the mean attenuation values of TNC and VNC, 33 items for each DECT were compared according to the multiphasic VNCs and organs. More than half of the comparison items for each DECT showed significant differences (tbDECT 17/33; dsDECT 19/33; Bonferroni correction < 0.0167). The percentage of cases with an absolute difference ≤ 10 HU was 56.7%, 69.2%, and 78.6% in AVNC, PVNC, and DVNC in tbDECT, respectively, and 70.5%, 78%, and 78% in dsDECT, respectively.
Conclusion: VNCs derived from the two DECTs were insufficient to replace TNCs because of the considerable difference in attenuation values.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9935954 | PMC |
| http://dx.doi.org/10.3348/jksr.2021.0193 | DOI Listing |
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