Kangning Meng , Guanzhong Gong , Rui Liu , Shanshan Du , Ruozheng Wang , Yong Yin
{"title":"基于多相对比增强磁共振成像确定肝细胞癌放射治疗的总肿瘤体积","authors":"Kangning Meng , Guanzhong Gong , Rui Liu , Shanshan Du , Ruozheng Wang , Yong Yin","doi":"10.1016/j.ctro.2024.100877","DOIUrl":null,"url":null,"abstract":"<div><h3>Purpose</h3><div>The aim of this study was to quantitatively analyze of the differences in determining the gross tumor volume (GTV) for hepatocellular carcinoma (HCC) radiotherapy using multi-phase contrast-enhanced magnetic resonance imaging (CE-MRI) and provide a reference for determining the GTV for radiotherapy of HCC.</div></div><div><h3>Methods</h3><div>This retrospective study analyzed 99 HCC patients (145 lesions) who underwent MR simulation. T<sub>1</sub>-weighted imaging (T<sub>1</sub>WI), contrast-enhanced T<sub>1</sub>WI (CE-T<sub>1</sub>WI) at 15 s, 45 s, 75 s, 150 s, and 20 min after contrast agent injection were performed, comprising a total of six imaging sequences. The GTVs identified on different sequences were grouped and fused in various combinations. The internal GTV (IGTV), which was the reference structure, was obtained by the fusion of all six sequences. Mean signal intensity (SI), volume, shape, and fibrous capsule (FC) thickness among GTVs were compared.</div></div><div><h3>Results</h3><div>(1) The mean SI value of GTV<sub>-T1WI</sub>, GTV<sub>-15s</sub>-GTV<sub>-20min</sub> in patients with transarterial chemoembolization (TACE) was lower by 14.09 % (GTV<sub>-T1WI</sub>) to 31.31 % (GTV<sub>-15s</sub>) compared with that in patients without TACE. Except for GTV<sub>-T1WI</sub>, the differences in SI values between the two groups for other GTVs were statistically significant (<em>p</em> < 0.05). (2) The volumes of GTV<sub>-T1WI</sub>, GTV<sub>-15s</sub>-GTV<sub>-20min</sub> ranged from 32.66-34.99 cm<sup>3</sup>. The volume differences between GTV<sub>-45s</sub> and the other GTVs were statistically significant (<em>p</em> < 0.05), excluding the GTV<sub>-T1WI</sub>. (3) Compared with the IGTV, the change trend of GTV volume reduction rate is consistent with that of dice similarity coefficients (DSC). (4) In the CE-T<sub>1</sub>WI sequences (except for CE-T<sub>1</sub>WI<sub>-15s</sub>), FC measurement was possible in 39.31 % of lesions (57/145), with the largest mean thickness observed at 75 s.</div></div><div><h3>Conclusion</h3><div>Although single-phase CE-MRI introduces uncertainty in HCC GTV determination, combining different phases CE-MRI can enhance accuracy. The CE-T<sub>1</sub>WI<sub>-45s</sub> should be routinely included as a necessary scanning sequence.</div></div>","PeriodicalId":10342,"journal":{"name":"Clinical and Translational Radiation Oncology","volume":"50 ","pages":"Article 100877"},"PeriodicalIF":2.7000,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Determining the gross tumor volume for hepatocellular carcinoma radiotherapy based on multi-phase contrast-enhanced magnetic resonance imaging\",\"authors\":\"Kangning Meng , Guanzhong Gong , Rui Liu , Shanshan Du , Ruozheng Wang , Yong Yin\",\"doi\":\"10.1016/j.ctro.2024.100877\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Purpose</h3><div>The aim of this study was to quantitatively analyze of the differences in determining the gross tumor volume (GTV) for hepatocellular carcinoma (HCC) radiotherapy using multi-phase contrast-enhanced magnetic resonance imaging (CE-MRI) and provide a reference for determining the GTV for radiotherapy of HCC.</div></div><div><h3>Methods</h3><div>This retrospective study analyzed 99 HCC patients (145 lesions) who underwent MR simulation. T<sub>1</sub>-weighted imaging (T<sub>1</sub>WI), contrast-enhanced T<sub>1</sub>WI (CE-T<sub>1</sub>WI) at 15 s, 45 s, 75 s, 150 s, and 20 min after contrast agent injection were performed, comprising a total of six imaging sequences. The GTVs identified on different sequences were grouped and fused in various combinations. The internal GTV (IGTV), which was the reference structure, was obtained by the fusion of all six sequences. Mean signal intensity (SI), volume, shape, and fibrous capsule (FC) thickness among GTVs were compared.</div></div><div><h3>Results</h3><div>(1) The mean SI value of GTV<sub>-T1WI</sub>, GTV<sub>-15s</sub>-GTV<sub>-20min</sub> in patients with transarterial chemoembolization (TACE) was lower by 14.09 % (GTV<sub>-T1WI</sub>) to 31.31 % (GTV<sub>-15s</sub>) compared with that in patients without TACE. Except for GTV<sub>-T1WI</sub>, the differences in SI values between the two groups for other GTVs were statistically significant (<em>p</em> < 0.05). (2) The volumes of GTV<sub>-T1WI</sub>, GTV<sub>-15s</sub>-GTV<sub>-20min</sub> ranged from 32.66-34.99 cm<sup>3</sup>. The volume differences between GTV<sub>-45s</sub> and the other GTVs were statistically significant (<em>p</em> < 0.05), excluding the GTV<sub>-T1WI</sub>. (3) Compared with the IGTV, the change trend of GTV volume reduction rate is consistent with that of dice similarity coefficients (DSC). (4) In the CE-T<sub>1</sub>WI sequences (except for CE-T<sub>1</sub>WI<sub>-15s</sub>), FC measurement was possible in 39.31 % of lesions (57/145), with the largest mean thickness observed at 75 s.</div></div><div><h3>Conclusion</h3><div>Although single-phase CE-MRI introduces uncertainty in HCC GTV determination, combining different phases CE-MRI can enhance accuracy. The CE-T<sub>1</sub>WI<sub>-45s</sub> should be routinely included as a necessary scanning sequence.</div></div>\",\"PeriodicalId\":10342,\"journal\":{\"name\":\"Clinical and Translational Radiation Oncology\",\"volume\":\"50 \",\"pages\":\"Article 100877\"},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2024-10-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Clinical and Translational Radiation Oncology\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S240563082400154X\",\"RegionNum\":3,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ONCOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Clinical and Translational Radiation Oncology","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S240563082400154X","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ONCOLOGY","Score":null,"Total":0}
Determining the gross tumor volume for hepatocellular carcinoma radiotherapy based on multi-phase contrast-enhanced magnetic resonance imaging
Purpose
The aim of this study was to quantitatively analyze of the differences in determining the gross tumor volume (GTV) for hepatocellular carcinoma (HCC) radiotherapy using multi-phase contrast-enhanced magnetic resonance imaging (CE-MRI) and provide a reference for determining the GTV for radiotherapy of HCC.
Methods
This retrospective study analyzed 99 HCC patients (145 lesions) who underwent MR simulation. T1-weighted imaging (T1WI), contrast-enhanced T1WI (CE-T1WI) at 15 s, 45 s, 75 s, 150 s, and 20 min after contrast agent injection were performed, comprising a total of six imaging sequences. The GTVs identified on different sequences were grouped and fused in various combinations. The internal GTV (IGTV), which was the reference structure, was obtained by the fusion of all six sequences. Mean signal intensity (SI), volume, shape, and fibrous capsule (FC) thickness among GTVs were compared.
Results
(1) The mean SI value of GTV-T1WI, GTV-15s-GTV-20min in patients with transarterial chemoembolization (TACE) was lower by 14.09 % (GTV-T1WI) to 31.31 % (GTV-15s) compared with that in patients without TACE. Except for GTV-T1WI, the differences in SI values between the two groups for other GTVs were statistically significant (p < 0.05). (2) The volumes of GTV-T1WI, GTV-15s-GTV-20min ranged from 32.66-34.99 cm3. The volume differences between GTV-45s and the other GTVs were statistically significant (p < 0.05), excluding the GTV-T1WI. (3) Compared with the IGTV, the change trend of GTV volume reduction rate is consistent with that of dice similarity coefficients (DSC). (4) In the CE-T1WI sequences (except for CE-T1WI-15s), FC measurement was possible in 39.31 % of lesions (57/145), with the largest mean thickness observed at 75 s.
Conclusion
Although single-phase CE-MRI introduces uncertainty in HCC GTV determination, combining different phases CE-MRI can enhance accuracy. The CE-T1WI-45s should be routinely included as a necessary scanning sequence.
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