The impact of a high‐definition multileaf collimator for spine SBRT
dc.contributor.author | Younge, Kelly C. | |
dc.contributor.author | Kuchta, John R. | |
dc.contributor.author | Mikell, Justin K. | |
dc.contributor.author | Rosen, Benjamin | |
dc.contributor.author | Bredfeldt, Jeremy S. | |
dc.contributor.author | Matuszak, Martha M. | |
dc.date.accessioned | 2017-12-15T16:48:17Z | |
dc.date.available | 2019-01-07T18:34:37Z | en |
dc.date.issued | 2017-11 | |
dc.identifier.citation | Younge, Kelly C.; Kuchta, John R.; Mikell, Justin K.; Rosen, Benjamin; Bredfeldt, Jeremy S.; Matuszak, Martha M. (2017). "The impact of a high‐definition multileaf collimator for spine SBRT." Journal of Applied Clinical Medical Physics 18(6): 97-103. | |
dc.identifier.issn | 1526-9914 | |
dc.identifier.issn | 1526-9914 | |
dc.identifier.uri | https://hdl.handle.net/2027.42/139989 | |
dc.description.abstract | PurposeAdvanced radiotherapy delivery systems designed for high‐dose, high‐precision treatments often come equipped with high‐definition multi‐leaf collimators (HD‐MLC) aimed at more finely shaping radiation dose to the target. In this work, we study the effect of a high definition MLC on spine stereotactic body radiation therapy (SBRT) treatment plan quality and plan deliverability.Methods and MaterialsSeventeen spine SBRT cases were planned with VMAT using a standard definition MLC (M120), HD‐MLC, and HD‐MLC with an added objective to reduce monitor units (MU). M120 plans were converted into plans deliverable on an HD‐MLC using in‐house software. Plan quality and plan deliverability as measured by portal dosimetry were compared among the three types of plans.ResultsOnly minor differences were noted in plan quality between the M120 and HD‐MLC plans. Plans generated with the HD‐MLC tended to have better spinal cord sparing (3% reduction in maximum cord dose). HD‐MLC plans on average had 12% more MU and 55% greater modulation complexity as defined by an in‐house metric. HD‐MLC plans also had significantly degraded deliverability. Of the VMAT arcs measured, 94% had lower gamma passing metrics when using the HD‐MLC.ConclusionModest improvements in plan quality were noted when switching from M120 to HD‐MLC at the expense of significantly less accurate deliverability in some cases. | |
dc.publisher | Wiley Periodicals, Inc. | |
dc.subject.other | complexity | |
dc.subject.other | deliverability | |
dc.subject.other | HD‐MLC | |
dc.subject.other | spine SBRT | |
dc.title | The impact of a high‐definition multileaf collimator for spine SBRT | |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | |
dc.subject.hlbsecondlevel | Medicine (General) | |
dc.subject.hlbtoplevel | Health Sciences | |
dc.description.peerreviewed | Peer Reviewed | |
dc.description.bitstreamurl | https://deepblue.lib.umich.edu/bitstream/2027.42/139989/1/acm212197.pdf | |
dc.description.bitstreamurl | https://deepblue.lib.umich.edu/bitstream/2027.42/139989/2/acm212197_am.pdf | |
dc.identifier.doi | 10.1002/acm2.12197 | |
dc.identifier.source | Journal of Applied Clinical Medical Physics | |
dc.identifier.citedreference | Sahgal A, Larson DA, Chang EL. Stereotactic body radiosurgery for spinal metastases: a critical review. Int J Radiat Oncol Biol Phys. 2008; 71: 642 – 665. | |
dc.identifier.citedreference | Younge KC, Matuszak MM, Moran JM, et al. Penalization of aperture complexity in inversely planned volumetric modulated arc therapy. Med Phys. 2012; 39: 7160. | |
dc.identifier.citedreference | Kielar KN, Mok E, Hsu A, et al. Verification of dosimetric accuracy on the TrueBeam STx: rounded leaf effect of the high definition MLC. Med Phys. 2012; 39: 6360 – 6371. | |
dc.identifier.citedreference | Paddick I. A simple scoring ratio to index the conformity of radiosurgical treatment plans. Technical note. J Neurosurg. 2000; 93: 219 – 222. | |
dc.identifier.citedreference | Chae SM, Lee GW, Son SH. The effect of multileaf collimator leaf width on the radiosurgery planning for spine lesion treatment in terms of the modulated techniques and target complexity. Radiat Oncol. 2014; 9: 72. | |
dc.identifier.citedreference | Varian Medical Systems. Eclipse photon and electron algorithms reference guide, chapter 12 portal dose algorithms, 2015; 258 – 284. | |
dc.identifier.citedreference | Kairn T, Papworth D, Crowe S, et al. Dosimetric quality, accuracy, and deliverability of modulated radiotherapy treatments for spinal metastases. Med Dosim. 2016; 41: 258 – 266. | |
dc.identifier.citedreference | Wuu CS, Kessel J, Xu Y. 3‐D dosimetric evaluation of 2.5 mm HD120 ® multileaf system for intensity modulated stereotactic radiosurgery using optical CT based polymer gel dosimetry. J Phys: Conf Ser. 2009; 164: 012056. | |
dc.identifier.citedreference | Dhabaan A, Elder E, Schreibmann E, et al. Dosimetric performance of the new high‐definition multileaf collimator for intracranial stereotactic radiosurgery. J Appl Clin Med Phys. 2010; 11: 197 – 211. | |
dc.identifier.citedreference | Tanyi HA, Summers PA, McCracken CL, et al. Implications of a high‐definition multileaf collimator (HD‐MLC) on treatment planning techniques for stereotactic body radiation therapy (SBRT): a planning study. Radiat Oncol. 2009; 4: 22. | |
dc.identifier.citedreference | Glide‐Hurst C, Bellon M, Foster R, et al. Commissioning of the Varian TrueBeam linear accelerator: a multi‐institutional study. Med Phys. 2013; 40: 031719. | |
dc.identifier.citedreference | Younge KC, Roberts D, Janes LA, et al. Predicting deliverability of volumetric‐modulated arc therapy (VMAT) plans using aperture complexity analysis. J Appl Clin Med Phys. 2016; 17: 124 – 131. | |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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