Jeong Sub Lee, Guk Myung Choi, Bong Soo Kim, Su Yeon Ko, Kyung Ryeol Lee, Jeong Jae Kim, Doo Ri Kim
{"title":"[单源双束与双源双能CT肝脏真假非对比图像的比较]。","authors":"Jeong Sub Lee, Guk Myung Choi, Bong Soo Kim, Su Yeon Ko, Kyung Ryeol Lee, Jeong Jae Kim, Doo Ri Kim","doi":"10.3348/jksr.2021.0193","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>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).</p><p><strong>Materials and methods: </strong>This retrospective study included 62 patients who underwent liver dynamic DECT with tbDECT (<i>n</i> = 32) or dsDECT (<i>n</i> = 30). Arterial VNC (AVNC), portal VNC (PVNC), and delayed VNC (DVNC) were reconstructed using multiphasic DECT. Attenuation values of multiple intra-abdominal organs (<i>n</i> = 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).</p><p><strong>Results: </strong>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 <i>p</i> < 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.</p><p><strong>Conclusion: </strong>VNCs derived from the two DECTs were insufficient to replace TNCs because of the considerable difference in attenuation values.</p>","PeriodicalId":17455,"journal":{"name":"Journal of the Korean Society of Radiology","volume":"84 1","pages":"170-184"},"PeriodicalIF":0.0000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/a4/58/jksr-84-170.PMC9935954.pdf","citationCount":"0","resultStr":"{\"title\":\"[Comparison of True and Virtual Non-Contrast Images of Liver Obtained with Single-Source Twin Beam and Dual-Source Dual-Energy CT].\",\"authors\":\"Jeong Sub Lee, Guk Myung Choi, Bong Soo Kim, Su Yeon Ko, Kyung Ryeol Lee, Jeong Jae Kim, Doo Ri Kim\",\"doi\":\"10.3348/jksr.2021.0193\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Purpose: </strong>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).</p><p><strong>Materials and methods: </strong>This retrospective study included 62 patients who underwent liver dynamic DECT with tbDECT (<i>n</i> = 32) or dsDECT (<i>n</i> = 30). Arterial VNC (AVNC), portal VNC (PVNC), and delayed VNC (DVNC) were reconstructed using multiphasic DECT. Attenuation values of multiple intra-abdominal organs (<i>n</i> = 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).</p><p><strong>Results: </strong>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 <i>p</i> < 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.</p><p><strong>Conclusion: </strong>VNCs derived from the two DECTs were insufficient to replace TNCs because of the considerable difference in attenuation values.</p>\",\"PeriodicalId\":17455,\"journal\":{\"name\":\"Journal of the Korean Society of Radiology\",\"volume\":\"84 1\",\"pages\":\"170-184\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/a4/58/jksr-84-170.PMC9935954.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of the Korean Society of Radiology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.3348/jksr.2021.0193\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"Medicine\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Korean Society of Radiology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3348/jksr.2021.0193","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Medicine","Score":null,"Total":0}
[Comparison of True and Virtual Non-Contrast Images of Liver Obtained with Single-Source Twin Beam and Dual-Source Dual-Energy CT].
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 (n = 32) or dsDECT (n = 30). Arterial VNC (AVNC), portal VNC (PVNC), and delayed VNC (DVNC) were reconstructed using multiphasic DECT. Attenuation values of multiple intra-abdominal organs (n = 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 p < 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.
![[Comparison of True and Virtual Non-Contrast Images of Liver Obtained with Single-Source Twin Beam and Dual-Source Dual-Energy CT].](https://img.booksci.cn/booksciimg/2023-1/2024030578275154031196568119933.jpg)
![[Comparison of True and Virtual Non-Contrast Images of Liver Obtained with Single-Source Twin Beam and Dual-Source Dual-Energy CT].](https://img.booksci.cn/booksciimg/2023-1/2024030578286694387986812358937.jpg)
![[Comparison of True and Virtual Non-Contrast Images of Liver Obtained with Single-Source Twin Beam and Dual-Source Dual-Energy CT].](https://img.booksci.cn/booksciimg/2023-1/202403057828844138614172615237.jpg)
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