Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김규보 | * |
dc.date.accessioned | 2019-11-19T16:31:05Z | - |
dc.date.available | 2019-11-19T16:31:05Z | - |
dc.date.issued | 2015 | * |
dc.identifier.issn | 0007-1285 | * |
dc.identifier.issn | 1748-880X | * |
dc.identifier.other | OAK-25781 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/252086 | - |
dc.description.abstract | Objective: To determine a new metric utilizing multileaf collimator (MLC) speeds and accelerations to predict plan delivery accuracy of volumetric modulated arc therapy (VMAT). Methods: To verify VMAT delivery accuracy, gamma evaluations, analysis of mechanical parameter difference between plans and log files, and analysis of changes in dose-volumetric parameters between plans and plans reconstructed with log files were performed with 40 VMAT plans. The average proportion of leaf speeds ranging from l to h cm s(-1) (Sl-h and l-h = 0-0.4, 0.4-0.8, 0.8-1.2, 1.2-1.6 and 1.6-2.0), mean and standard deviation of MLC speeds were calculated for each VMAT plan. The same was carried out for accelerations in centimetre per second squared (A(l-h) and l-h = 0-4, 4-8, 8-12, 12-16 and 16-20). The correlations of those indicators to plan delivery accuracy were analysed with Spearman's correlation coefficient (r(s)). Results: The S1.2-1.6 and mean acceleration of MLCs showed generally higher correlations to plan delivery accuracy than did others. The highest r(s) values were observed between S1.2-1.6 and global 1%/2mm (r(s) = -0.698 with p<0.001) as well as mean acceleration and global 1%/2mm (r(s) = -0.650 with p<0.001). As the proportion of MLC speeds and accelerations >0.4 and 4 cm s(-2) increased, the plan delivery accuracy of VMAT decreased. Conclusion: The variations in MLC speeds and accelerations showed considerable correlations to VMAT delivery accuracy. Advances in knowledge: As the MLC speeds and accelerations increased, VMAT delivery accuracy reduced. | * |
dc.language | English | * |
dc.publisher | BRITISH INST RADIOLOGY | * |
dc.title | The effect of MLC speed and acceleration on the plan delivery accuracy of VMAT | * |
dc.type | Article | * |
dc.relation.issue | 1049 | * |
dc.relation.volume | 88 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.journaltitle | BRITISH JOURNAL OF RADIOLOGY | * |
dc.identifier.doi | 10.1259/bjr.20140698 | * |
dc.identifier.wosid | WOS:000358533600013 | * |
dc.author.google | Park, J. M. | * |
dc.author.google | Wu, H-G | * |
dc.author.google | Kim, J. H. | * |
dc.author.google | Carlson, J. N. K. | * |
dc.author.google | Kim, K. | * |
dc.contributor.scopusid | 김규보(8213302900) | * |
dc.date.modifydate | 20240222162403 | * |