دورية أكاديمية
Delta 4 Discover transmission detector: A comprehensive characterization for in-vivo VMAT monitoring.
| العنوان: | Delta 4 Discover transmission detector: A comprehensive characterization for in-vivo VMAT monitoring. |
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| المؤلفون: | Petrucci E; Medical Physics Department, A.S.L. TO4, 10015 Ivrea, TO, Italy., Radici L; Medical Physics Department, A.S.L. TO4, 10015 Ivrea, TO, Italy., Borca VC; Medical Physics Department, A.S.L. TO4, 10015 Ivrea, TO, Italy., Ferrario S; Radiotherapy Department, A.S.L. TO4, 10015 Ivrea, TO, Italy., Paolini M; Radiotherapy Department, A.S.L. TO4, 10015 Ivrea, TO, Italy., Pasquino M; Medical Physics Department, A.S.L. TO4, 10015 Ivrea, TO, Italy. Electronic address: mpasquino@aslto4.piemonte.it. |
| المصدر: | Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB) [Phys Med] 2021 May; Vol. 85, pp. 15-23. Date of Electronic Publication: 2021 May 01. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Istituti Editoriali e Poligrafici Internazionali Country of Publication: Italy NLM ID: 9302888 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1724-191X (Electronic) Linking ISSN: 11201797 NLM ISO Abbreviation: Phys Med Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: Pisa : Istituti Editoriali e Poligrafici Internazionali Original Publication: Lugano, Switzerland : Giardini editori S.A., |
| مواضيع طبية MeSH: | Radiotherapy, Intensity-Modulated*, Particle Accelerators ; Radiometry ; Radiotherapy Dosage ; Radiotherapy Planning, Computer-Assisted ; Reproducibility of Results |
| مستخلص: | Objective: To investigate the dosimetric behaviour, influence on photon beam fluence and error detection capability of Delta 4 Discover transmission detector. Methods: The transmission detector (TRD) was characterized on a TrueBeam linear accelerator with 6 MV beams. Linearity, reproducibility and dose rate dependence were investigated. The effect on photon beam fluence was evaluated in terms of beam profiles, percentage depth dose, transmission factor and surface dose for different open field sizes. The transmission factor of the 10x10 cm 2 field was entered in the TPS's configuration and its correct use in the dose calculation was verified recalculating 17 clinical IMRT/VMAT plans. Surface dose was measured for 20 IMRT fields. The capability to detect different delivery errors was investigated evaluating dose gamma index, MLC gamma index and leaf position of 15 manually modified VMAT plans. Results: TRD showed a linear dependence on MU. No dose rate dependence was observed. Short-term and long-term reproducibility were within 0.1% and 0.5%. The presence of the TRD did not significantly affect PDDs and profiles. The transmission factor of the 10x10 cm 2 field size was 0.985 and 0.983, for FF and FFF beams respectively. The 17 recalculated plans met our clinical gamma-index passing rate, confirming the correct use of the transmission factor by the TPS. The surface dose differences for the open fields increase for shorter SSDs and greater field size. Differences in surface dose for the IMRT beams were less than 2%. Output variation ≥2%, collimator angle variations within 0.3°, gantry angle errors of 1°, jaw tracking and leaf position errors were detected. Conclusions: Delta 4 Discover shows good linearity and reproducibility, is not dependent on dose rate and does not affect beam quality and dose profiles. It is also capable to detect dosimetric and geometric errors and therefore it is suitable for monitoring VMAT delivery. (Copyright © 2021 Associazione Italiana di Fisica Medica. Published by Elsevier Ltd. All rights reserved.) |
| فهرسة مساهمة: | Keywords: IMRT quality assurance; In-vivo delivery monitoring; Transmission detector |
| تواريخ الأحداث: | Date Created: 20210504 Date Completed: 20210625 Latest Revision: 20210625 |
| رمز التحديث: | 20221213 |
| DOI: | 10.1016/j.ejmp.2021.04.017 |
| PMID: | 33945949 |
| قاعدة البيانات: | MEDLINE |
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Full Text Finder | تدمد: | 1724-191X |
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| DOI: | 10.1016/j.ejmp.2021.04.017 |