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Impact of (99m)Tc-GSA SPECT Image-Guided Inverse Planning on Dose–Function Histogram Parameters for Stereotactic Body Radiation Therapy Planning for Patients With Hepatocellular Carcinoma: A Dosimetric Comparison Study

PURPOSE: To evaluate the impact of (99m)Tc-labeled diethylene triamine pentaacetate-galactosyl human serum albumin ((99m)Tc-GSA) single-photon emission computed tomography (SPECT) image-guided inverse planning on the dose–function histogram (DFH) parameters for stereotactic body radiation therapy pl...

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Autores principales: Toya, Ryo, Saito, Tetsuo, Kai, Yudai, Shiraishi, Shinya, Matsuyama, Tomohiko, Watakabe, Takahiro, Sakamoto, Fumi, Tsuda, Noriko, Shimohigashi, Yoshinobu, Yamashita, Yasuyuki, Oya, Natsuo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6402061/
https://www.ncbi.nlm.nih.gov/pubmed/30858770
http://dx.doi.org/10.1177/1559325819832149
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author Toya, Ryo
Saito, Tetsuo
Kai, Yudai
Shiraishi, Shinya
Matsuyama, Tomohiko
Watakabe, Takahiro
Sakamoto, Fumi
Tsuda, Noriko
Shimohigashi, Yoshinobu
Yamashita, Yasuyuki
Oya, Natsuo
author_facet Toya, Ryo
Saito, Tetsuo
Kai, Yudai
Shiraishi, Shinya
Matsuyama, Tomohiko
Watakabe, Takahiro
Sakamoto, Fumi
Tsuda, Noriko
Shimohigashi, Yoshinobu
Yamashita, Yasuyuki
Oya, Natsuo
author_sort Toya, Ryo
collection PubMed
description PURPOSE: To evaluate the impact of (99m)Tc-labeled diethylene triamine pentaacetate-galactosyl human serum albumin ((99m)Tc-GSA) single-photon emission computed tomography (SPECT) image-guided inverse planning on the dose–function histogram (DFH) parameters for stereotactic body radiation therapy planning in patients with hepatocellular carcinoma (HCC). METHODS: Eleven patients were enrolled in this study. The functional liver structure (FLS) was derived from SPECT thresholds of 60% to 80% of the maximum pixel value. Two treatment plans optimized without FLS (plan C) and with FLS (plan F) were designed for 50 Gy to the planning target volume (PTV). The DFH parameters were calculated as follows: Fx = (sum of the counts within the liver volume receiving a dose >x Gy/sum of the counts within the whole liver volume) × 100. Other parameters for the PTV included D(95), mean dose, conformity index (CI), and homogeneity index (HI). RESULTS: Compared with plan C, plan F significantly reduced DFH parameters of F(5) to F(40) (P < .05). There were no significant differences in the parameters of the PTV of D(95), mean dose, CI, and HI and organs at risks (stomach, duodenum, spinal cord, and kidneys) between plans C and F. CONCLUSION: DFH analyses revealed that (99m)Tc-GSA SPECT image-guided inverse planning provided dosimetric benefits related to sparing of liver function and may reduce hepatic toxicities.
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spelling pubmed-64020612019-03-11 Impact of (99m)Tc-GSA SPECT Image-Guided Inverse Planning on Dose–Function Histogram Parameters for Stereotactic Body Radiation Therapy Planning for Patients With Hepatocellular Carcinoma: A Dosimetric Comparison Study Toya, Ryo Saito, Tetsuo Kai, Yudai Shiraishi, Shinya Matsuyama, Tomohiko Watakabe, Takahiro Sakamoto, Fumi Tsuda, Noriko Shimohigashi, Yoshinobu Yamashita, Yasuyuki Oya, Natsuo Dose Response Original Article PURPOSE: To evaluate the impact of (99m)Tc-labeled diethylene triamine pentaacetate-galactosyl human serum albumin ((99m)Tc-GSA) single-photon emission computed tomography (SPECT) image-guided inverse planning on the dose–function histogram (DFH) parameters for stereotactic body radiation therapy planning in patients with hepatocellular carcinoma (HCC). METHODS: Eleven patients were enrolled in this study. The functional liver structure (FLS) was derived from SPECT thresholds of 60% to 80% of the maximum pixel value. Two treatment plans optimized without FLS (plan C) and with FLS (plan F) were designed for 50 Gy to the planning target volume (PTV). The DFH parameters were calculated as follows: Fx = (sum of the counts within the liver volume receiving a dose >x Gy/sum of the counts within the whole liver volume) × 100. Other parameters for the PTV included D(95), mean dose, conformity index (CI), and homogeneity index (HI). RESULTS: Compared with plan C, plan F significantly reduced DFH parameters of F(5) to F(40) (P < .05). There were no significant differences in the parameters of the PTV of D(95), mean dose, CI, and HI and organs at risks (stomach, duodenum, spinal cord, and kidneys) between plans C and F. CONCLUSION: DFH analyses revealed that (99m)Tc-GSA SPECT image-guided inverse planning provided dosimetric benefits related to sparing of liver function and may reduce hepatic toxicities. SAGE Publications 2019-03-04 /pmc/articles/PMC6402061/ /pubmed/30858770 http://dx.doi.org/10.1177/1559325819832149 Text en © The Author(s) 2019 http://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).
spellingShingle Original Article
Toya, Ryo
Saito, Tetsuo
Kai, Yudai
Shiraishi, Shinya
Matsuyama, Tomohiko
Watakabe, Takahiro
Sakamoto, Fumi
Tsuda, Noriko
Shimohigashi, Yoshinobu
Yamashita, Yasuyuki
Oya, Natsuo
Impact of (99m)Tc-GSA SPECT Image-Guided Inverse Planning on Dose–Function Histogram Parameters for Stereotactic Body Radiation Therapy Planning for Patients With Hepatocellular Carcinoma: A Dosimetric Comparison Study
title Impact of (99m)Tc-GSA SPECT Image-Guided Inverse Planning on Dose–Function Histogram Parameters for Stereotactic Body Radiation Therapy Planning for Patients With Hepatocellular Carcinoma: A Dosimetric Comparison Study
title_full Impact of (99m)Tc-GSA SPECT Image-Guided Inverse Planning on Dose–Function Histogram Parameters for Stereotactic Body Radiation Therapy Planning for Patients With Hepatocellular Carcinoma: A Dosimetric Comparison Study
title_fullStr Impact of (99m)Tc-GSA SPECT Image-Guided Inverse Planning on Dose–Function Histogram Parameters for Stereotactic Body Radiation Therapy Planning for Patients With Hepatocellular Carcinoma: A Dosimetric Comparison Study
title_full_unstemmed Impact of (99m)Tc-GSA SPECT Image-Guided Inverse Planning on Dose–Function Histogram Parameters for Stereotactic Body Radiation Therapy Planning for Patients With Hepatocellular Carcinoma: A Dosimetric Comparison Study
title_short Impact of (99m)Tc-GSA SPECT Image-Guided Inverse Planning on Dose–Function Histogram Parameters for Stereotactic Body Radiation Therapy Planning for Patients With Hepatocellular Carcinoma: A Dosimetric Comparison Study
title_sort impact of (99m)tc-gsa spect image-guided inverse planning on dose–function histogram parameters for stereotactic body radiation therapy planning for patients with hepatocellular carcinoma: a dosimetric comparison study
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6402061/
https://www.ncbi.nlm.nih.gov/pubmed/30858770
http://dx.doi.org/10.1177/1559325819832149
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