Development of a novel ArcCHECK™ insert for routine quality assurance of VMAT delivery including dose calculation with inhomogeneities.
Saved in:
| Title: | Development of a novel ArcCHECK™ insert for routine quality assurance of VMAT delivery including dose calculation with inhomogeneities. |
|---|---|
| Authors: | Fakir, H.1, Gaede, S.1, Mulligan, M.1, Chen, J. Z.1 |
| Source: | Medical Physics. Jul2012, Vol. 39 Issue 7,Part 1, p4203-4208. 6p. |
| Subjects: | Radiotherapy, Quality assurance, Radiation doses, Stereotaxic techniques, Comparative studies, Medical radiology |
| Abstract: | Purpose: To design a versatile, nonhomogeneous insert for the dose verification phantom ArcCHECK™ (Sun Nuclear Corp., FL) and to demonstrate its usefulness for the verification of dose distributions in inhomogeneous media. As an example, we demonstrate it can be used clinically for routine quality assurance of two volumetric modulated arc therapy (VMAT) systems for lung stereotactic body radiation therapy (SBRT): SmartArc® (Pinnacle3, Philips Radiation Oncology Systems, Fitchburg, WI) and RapidArc® (Eclipse™, Varian Medical Systems, Palo Alto, CA). Methods: The cylindrical detector array ArcCHECK™ has a retractable homogeneous acrylic insert. In this work, we designed and manufactured a customized heterogeneous insert with densities that simulate soft tissue, lung, bone, and air. The insert offers several possible heterogeneity configurations and multiple locations for point dose measurements. SmartArc® and RapidArc® plans for lung SBRT were generated and copied to ArcCHECK™ for each inhomogeneity configuration. Dose delivery was done on a Varian 2100 ix linac. The evaluation of dose distributions was based on gamma analysis of the diode measurements and point doses measurements at different positions near the inhomogeneities. Results: The insert was successfully manufactured and tested with different measurements of VMAT plans. Dose distributions measured with the homogeneous insert showed gamma passing rates similar to our clinical results (∼99%) for both treatment-planning systems. Using nonhomogeneous inserts decreased the passing rates by up to 3.6% in the examples studied. Overall, SmartArc® plans showed better gamma passing rates for nonhomogeneous measurements. The discrepancy between calculated and measured point doses was increased up to 6.5% for the nonhomogeneous insert depending on the inhomogeneity configuration and measurement location. SmartArc® and RapidArc® plans had similar plan quality but RapidArc® plans had significantly higher monitor units (up to 70%). Conclusions: A versatile, nonhomogeneous insert was developed for ArcCHECK™ for an easy and quick evaluation of dose calculations with nonhomogeneous media and for comparison of different treatment planning systems. The device was tested for SmartArc® and RapidArc® plans for lung SBRT, showing the uncertainties of dose calculations with inhomogeneities. The new insert combines the convenience of the ArcCHECK™ and the possibility of assessing dose distributions in inhomogeneous media. [ABSTRACT FROM AUTHOR] |
| Copyright of Medical Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 78029793 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Development of a novel ArcCHECK™ insert for routine quality assurance of VMAT delivery including dose calculation with inhomogeneities. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Fakir%2C+H%2E%22">Fakir, H.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Gaede%2C+S%2E%22">Gaede, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mulligan%2C+M%2E%22">Mulligan, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Chen%2C+J%2E+Z%2E%22">Chen, J. Z.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Medical+Physics%22">Medical Physics</searchLink>. Jul2012, Vol. 39 Issue 7,Part 1, p4203-4208. 6p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Radiotherapy%22">Radiotherapy</searchLink><br /><searchLink fieldCode="DE" term="%22Quality+assurance%22">Quality assurance</searchLink><br /><searchLink fieldCode="DE" term="%22Radiation+doses%22">Radiation doses</searchLink><br /><searchLink fieldCode="DE" term="%22Stereotaxic+techniques%22">Stereotaxic techniques</searchLink><br /><searchLink fieldCode="DE" term="%22Comparative+studies%22">Comparative studies</searchLink><br /><searchLink fieldCode="DE" term="%22Medical+radiology%22">Medical radiology</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Purpose: To design a versatile, nonhomogeneous insert for the dose verification phantom ArcCHECK™ (Sun Nuclear Corp., FL) and to demonstrate its usefulness for the verification of dose distributions in inhomogeneous media. As an example, we demonstrate it can be used clinically for routine quality assurance of two volumetric modulated arc therapy (VMAT) systems for lung stereotactic body radiation therapy (SBRT): SmartArc® (Pinnacle3, Philips Radiation Oncology Systems, Fitchburg, WI) and RapidArc® (Eclipse™, Varian Medical Systems, Palo Alto, CA). Methods: The cylindrical detector array ArcCHECK™ has a retractable homogeneous acrylic insert. In this work, we designed and manufactured a customized heterogeneous insert with densities that simulate soft tissue, lung, bone, and air. The insert offers several possible heterogeneity configurations and multiple locations for point dose measurements. SmartArc® and RapidArc® plans for lung SBRT were generated and copied to ArcCHECK™ for each inhomogeneity configuration. Dose delivery was done on a Varian 2100 ix linac. The evaluation of dose distributions was based on gamma analysis of the diode measurements and point doses measurements at different positions near the inhomogeneities. Results: The insert was successfully manufactured and tested with different measurements of VMAT plans. Dose distributions measured with the homogeneous insert showed gamma passing rates similar to our clinical results (∼99%) for both treatment-planning systems. Using nonhomogeneous inserts decreased the passing rates by up to 3.6% in the examples studied. Overall, SmartArc® plans showed better gamma passing rates for nonhomogeneous measurements. The discrepancy between calculated and measured point doses was increased up to 6.5% for the nonhomogeneous insert depending on the inhomogeneity configuration and measurement location. SmartArc® and RapidArc® plans had similar plan quality but RapidArc® plans had significantly higher monitor units (up to 70%). Conclusions: A versatile, nonhomogeneous insert was developed for ArcCHECK™ for an easy and quick evaluation of dose calculations with nonhomogeneous media and for comparison of different treatment planning systems. The device was tested for SmartArc® and RapidArc® plans for lung SBRT, showing the uncertainties of dose calculations with inhomogeneities. The new insert combines the convenience of the ArcCHECK™ and the possibility of assessing dose distributions in inhomogeneous media. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Medical Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=78029793 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1118/1.4728222 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 6 StartPage: 4203 Subjects: – SubjectFull: Radiotherapy Type: general – SubjectFull: Quality assurance Type: general – SubjectFull: Radiation doses Type: general – SubjectFull: Stereotaxic techniques Type: general – SubjectFull: Comparative studies Type: general – SubjectFull: Medical radiology Type: general Titles: – TitleFull: Development of a novel ArcCHECK™ insert for routine quality assurance of VMAT delivery including dose calculation with inhomogeneities. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Fakir, H. – PersonEntity: Name: NameFull: Gaede, S. – PersonEntity: Name: NameFull: Mulligan, M. – PersonEntity: Name: NameFull: Chen, J. Z. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul2012 Type: published Y: 2012 Identifiers: – Type: issn-print Value: 00942405 Numbering: – Type: volume Value: 39 – Type: issue Value: 7,Part 1 Titles: – TitleFull: Medical Physics Type: main |
| ResultId | 1 |
