2022
DOI: 10.1002/acm2.13781
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Quantitative assessment of helical tomotherapy plans complexity

Abstract: Purpose An unnecessary amount of complexity in radiotherapy plans affects the efficiency of the treatments, increasing the uncertainty of dose deposition and its susceptibility to anatomical changes or setup errors. To date, tools for quantitatively assessing the complexity of tomotherapy plans are still limited. In this study, new metrics were developed to characterize different aspects of helical tomotherapy (HT) plans, and their actual effectiveness was investigated. Methods … Show more

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Cited by 9 publications
(4 citation statements)
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References 29 publications
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“…In contrast, when the DTF was within the range of 1.2-1.3 and 1.5-1.6 for head and neck and lung cases, respectively, the MF reached 3.0, which is recognized as a much higher value for head and neck plans [34]. A higher MF leads to greater plan complexity in tomotherapy, potentially leading to unacceptable dose delivery [22,23]. Therefore, it is necessary to select a DTF with a good balance between treatment time and plan quality.…”
Section: Discussionmentioning
confidence: 96%
See 1 more Smart Citation
“…In contrast, when the DTF was within the range of 1.2-1.3 and 1.5-1.6 for head and neck and lung cases, respectively, the MF reached 3.0, which is recognized as a much higher value for head and neck plans [34]. A higher MF leads to greater plan complexity in tomotherapy, potentially leading to unacceptable dose delivery [22,23]. Therefore, it is necessary to select a DTF with a good balance between treatment time and plan quality.…”
Section: Discussionmentioning
confidence: 96%
“…Generally, a pitch of 0.86/n (n is an integer) is used to mitigate the thread effect [21]. The MF is de ned as the maximum leaf opening time divided by the average (non-zero) leaf opening time and is an estimate of plan complexity [22,23]. Increasing the MF enables larger beam modulation resulting in high-quality plans; however, this leads to increased treatment time [4,24].…”
mentioning
confidence: 99%
“…Various local and global absolute gamma index values were recorded, with a threshold of 10%: 3%/3 mm, 2%/2 mm, 1%/1 mm, 3%/2 mm, and 2%/1 mm. For each of these measured plans, we extracted 65 complexity metrics using the MATLAB (version R2023) program TCoMX developed by Cavinato et al [12,13] to study the correlations among the LOT cutoff parameter, the gamma index values, and these metrics.…”
Section: Impact Of the Lot Cutoff On The Delivery Accuracymentioning
confidence: 99%
“…Thus, VOLO TM Ultra user using this table should carry out evaluations based on their own patients to confirm th compatibility of their practices with the methods used in this study. We tested the correlations between the gamma index values of the 36 measured plans and 65 complexity metrics [12] (see Appendix F), as well as the correlations between these metrics and the LOT cutoff values (see Appendix G). Our results show that the LOT cutoff value is correlated with certain metrics that are derived based directly on LOT values, such as minLOT, as well as certain CLNS and CFNS scores.…”
Section: Synthesis and Suggested Planning Parameter Valuesmentioning
confidence: 99%