A new evaluation method of target volume coverage and homogeneity for IMRT treatment planning

Myonggeun Yoon; Dongho Shin; Junghun Park; Sung Yong Park; Se Byeong Lee; Joo Young Kim; Tae Hyun Kim; Dae Yong Kim; Kwan Ho Cho

doi:10.1016/S1120-1797(06)80052-9

A new evaluation method of target volume coverage and homogeneity for IMRT treatment planning

Myonggeun Yoon, Dongho Shin, Junghun Park, Sung Yong Park, Se Byeong Lee, Joo Young Kim, Tae Hyun Kim, Dae Yong Kim, Kwan Ho Cho

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Based on the functional approximation of a target volume DVH (TV-DVH) to a modified step function, we propose a new index that indicates the degrees of dose coverage and homogeneity for target volume reached in clinical routines. Forty-seven IMRT patient plans are included in the analysis to explore the efficiency of the proposed method. The new index, named s-index, was defined to vary from 0 to 5 for clinically acceptable TV-DVH at our institution and showed the ability to give the user an idea whether the degree of dose coverage and homogeneity for target volume were adequate when the user-defined criteria had been in place. The result shows that the lower value of s-index indicates the higher dose coverage for the tumor volume and/or the higher dose homogeneity showing the faster fall-off rate at the percentage dose higher than 100 %. In addition to the quantification of dose coverage and homogeneity, it has been also shown that s-index is more accurate in evaluating the dose homogeneity in tumor volume than the conventional method. The proposed method has demonstrated the effectiveness in evaluating TV-DVH in terms of simple index and supplements currently used indices by providing complete information of a DVH curve in a treatment plan.

Original language	English
Pages (from-to)	43-51
Number of pages	9
Journal	Physica Medica
Volume	22
Issue number	2
DOIs	https://doi.org/10.1016/S1120-1797(06)80052-9
Publication status	Published - 2006
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by a research grant from the National Cancer Center, Korea (no. 0410310).

Keywords

Coverage index
DVH
Homogeneity
Step function

ASJC Scopus subject areas

Biophysics
Radiology Nuclear Medicine and imaging
General Physics and Astronomy

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Cite this

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title = "A new evaluation method of target volume coverage and homogeneity for IMRT treatment planning",

abstract = "Based on the functional approximation of a target volume DVH (TV-DVH) to a modified step function, we propose a new index that indicates the degrees of dose coverage and homogeneity for target volume reached in clinical routines. Forty-seven IMRT patient plans are included in the analysis to explore the efficiency of the proposed method. The new index, named s-index, was defined to vary from 0 to 5 for clinically acceptable TV-DVH at our institution and showed the ability to give the user an idea whether the degree of dose coverage and homogeneity for target volume were adequate when the user-defined criteria had been in place. The result shows that the lower value of s-index indicates the higher dose coverage for the tumor volume and/or the higher dose homogeneity showing the faster fall-off rate at the percentage dose higher than 100 %. In addition to the quantification of dose coverage and homogeneity, it has been also shown that s-index is more accurate in evaluating the dose homogeneity in tumor volume than the conventional method. The proposed method has demonstrated the effectiveness in evaluating TV-DVH in terms of simple index and supplements currently used indices by providing complete information of a DVH curve in a treatment plan.",

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author = "Myonggeun Yoon and Dongho Shin and Junghun Park and Park, {Sung Yong} and Lee, {Se Byeong} and Kim, {Joo Young} and Kim, {Tae Hyun} and Kim, {Dae Yong} and Cho, {Kwan Ho}",

note = "Funding Information: This work was supported by a research grant from the National Cancer Center, Korea (no. 0410310).",

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doi = "10.1016/S1120-1797(06)80052-9",

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AU - Yoon, Myonggeun

AU - Shin, Dongho

AU - Park, Junghun

AU - Park, Sung Yong

AU - Lee, Se Byeong

AU - Kim, Joo Young

AU - Kim, Tae Hyun

AU - Kim, Dae Yong

AU - Cho, Kwan Ho

N1 - Funding Information: This work was supported by a research grant from the National Cancer Center, Korea (no. 0410310).

PY - 2006

Y1 - 2006

N2 - Based on the functional approximation of a target volume DVH (TV-DVH) to a modified step function, we propose a new index that indicates the degrees of dose coverage and homogeneity for target volume reached in clinical routines. Forty-seven IMRT patient plans are included in the analysis to explore the efficiency of the proposed method. The new index, named s-index, was defined to vary from 0 to 5 for clinically acceptable TV-DVH at our institution and showed the ability to give the user an idea whether the degree of dose coverage and homogeneity for target volume were adequate when the user-defined criteria had been in place. The result shows that the lower value of s-index indicates the higher dose coverage for the tumor volume and/or the higher dose homogeneity showing the faster fall-off rate at the percentage dose higher than 100 %. In addition to the quantification of dose coverage and homogeneity, it has been also shown that s-index is more accurate in evaluating the dose homogeneity in tumor volume than the conventional method. The proposed method has demonstrated the effectiveness in evaluating TV-DVH in terms of simple index and supplements currently used indices by providing complete information of a DVH curve in a treatment plan.

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A new evaluation method of target volume coverage and homogeneity for IMRT treatment planning

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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