Dosimetric comparison of 2.5 mm vs. 3.0 mm leaf width micro-multileaf collimator-based treatment systems for intracranial stereotactic radiosurgery using dynamic conformal arcs: implications for treatment planning.
Purpose: The objective of our study was to explore any significant dosimetric differences between different leaf width (3.0 mm vs. 2.5 mm) micro-multileaf collimator (mMLC)-based treatment systems for intracranial stereotactic radiosurgery using dynamic conformal arcs (DCAs).Materials and Methods: T...
| Publicado en: | Japanese Journal of Radiology Vol. 29; no. 9; pp. 630 - 639 |
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| Autores principales: | , , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
Nov2011
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104584546&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104584546 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 18671071 AUCM jtl: Japanese Journal of Radiology issn: 18671071 maglogo: N pubinfo: dt: Nov2011 vid: 29 iid: 9 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 104584546 65968810 NLM21956368 2011298422 10.1007/s11604-011-0606-6 NLM21956368 104584546 ppf: 630 ppct: 9 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Dosimetric comparison of 2.5 mm vs. 3.0 mm leaf width micro-multileaf collimator-based treatment systems for intracranial stereotactic radiosurgery using dynamic conformal arcs: implications for treatment planning. aug: au: Ohtakara K Hayashi S Tanaka H Hoshi H Ohtakara, Kazuhiro Hayashi, Shinya Tanaka, Hidekazu Hoshi, Hiroaki affil: Department of Radiology, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu 501-1194, Japan sug: subj: Brain Neoplasms Surgery Radiosurgery Methods Algorithms Brain Neoplasms Magnetic Resonance Imaging Radiometry Methods Radiation Dosage Radiotherapy, Computer-Assisted Methods Reproducibility of Results Tomography, X-Ray Computed ab: Purpose: The objective of our study was to explore any significant dosimetric differences between different leaf width (3.0 mm vs. 2.5 mm) micro-multileaf collimator (mMLC)-based treatment systems for intracranial stereotactic radiosurgery using dynamic conformal arcs (DCAs).Materials and Methods: The systems included a 3 mm leaf width mMLC (m3) mounted on a nondedicated linac, and the Novalis Tx system with an integrated 2.5 mm width mMLC (HD120). Thirty plans for brain metastases were replanned for both systems using a uniform method for target definition and treatment planning for baseline comparison.Results: The target coverage values for the 80% isodose surface (IDS) and the D95 values in the HD120 plans were significantly lower than those for the m3 plans. The ratios of lower isodose volumes to the target for the HD120 were smaller than those for the m3. When a 1 mm leaf margin was added to the HD120 plans, these differences were reversed, but statistically significant differences were still observed.Conclusion: Significant dosimetric differences were observed between these systems. Different planning methods are required for the two systems to attain similar target coverage values with selected IDS, which can be achieved by adjusting the leaf margin with 0.1 mm increments or isocenter dose settings. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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