1
|
Kamonchanok A, Suphaphong S, Puttanawarut C, Jiarpinitnun C, Stansook N, Khachonkham S. Validation of image registration accuracy using TG-132 virtual phantoms. J Med Imaging Radiat Sci 2022. [DOI: 10.1016/j.jmir.2022.10.211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
|
2
|
Lerksuthirat T, Wikiniyadhanee R, Stitchantrakul W, Chitphuk S, Stansook N, Pipatpanyanugoon N, Jirawatnotai S, Dejsuphong D. A DNA repair player, ring finger protein 43, relieves etoposide-induced topoisomerase II poisoning. Genes Cells 2020; 25:718-729. [PMID: 32939879 DOI: 10.1111/gtc.12808] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 08/15/2020] [Accepted: 09/06/2020] [Indexed: 12/25/2022]
Abstract
Ring finger protein 43 (RNF43) is an E3 ubiquitin ligase which is well-known for its role in negative regulation of the Wnt-signaling pathway. However, the function in DNA double-strand break repairs has not been investigated. In this study, we used a lymphoblast cell line, DT40, and mouse embryonic fibroblast as cellular models to study DNA double-strand break (DSB) repairs. For this purpose, we created RNF43 knockout, RNF43-/- DT40 cell line to investigate DSB repairs. We found that deletion of RNF43 does not interfere with cell proliferation. However, after exposure to various types of DNA-damaging agents, RNF43-/- cells become more sensitive to topoisomerase II inhibitors, etoposide, and ICRF193, than wild type cells. Our results also showed that depletion of RNF43 results in apoptosis upon etoposide-mediated DNA damage. The delay in resolution of γH2AX and 53BP1 foci formation after etoposide treatment, as well as epistasis analysis with DNAPKcs, suggested that RNF43 might participate in DNA repair of etoposide-induced DSB via non-homologous end joining. Disturbed γH2AX foci formation in MEFs following pulse etoposide treatment supported the notion that RNF43 also functions DNA repair in mammalian cells. These findings propose two possible functions of RNF43, either participating in NHEJ or removing the blockage of 5' topo II adducts from DSB ends.
Collapse
Affiliation(s)
- Tassanee Lerksuthirat
- Research Center, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Rakkreat Wikiniyadhanee
- Section for Translational Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Wasana Stitchantrakul
- Research Center, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Sermsiri Chitphuk
- Research Center, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Nauljun Stansook
- Division of Radiotherapy and Oncology, Department of Diagnostic and Therapeutic Radiology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Nut Pipatpanyanugoon
- Siriraj Center of Research for Excellence (SiCORE) for Systems Pharmacology, Department of Pharmacology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Siwanon Jirawatnotai
- Siriraj Center of Research for Excellence (SiCORE) for Systems Pharmacology, Department of Pharmacology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Donniphat Dejsuphong
- Section for Translational Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| |
Collapse
|
3
|
Matar FS, Wilkinson D, Davis J, Biasi G, Causer T, Fuduli I, Brace OJ, Stansook N, Carolan M, Rosenfeld AB, Petasecca M. Corrigendum: “Quality assurance of VMAT on flattened and flattening filter free accelerators using high spatial resolution detector”. J Appl Clin Med Phys 2020. [PMCID: PMC7484817 DOI: 10.1002/acm2.12967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Fatima S. Matar
- Centre for Medical Radiation Physics University of Wollongong Wollongong Australia
| | - Dean Wilkinson
- Centre for Medical Radiation Physics University of Wollongong Wollongong Australia
- Illawarra Cancer Care Centre Wollongong Hospital Wollongong Australia
| | - Jeremy Davis
- Centre for Medical Radiation Physics University of Wollongong Wollongong Australia
- Illawarra Health and Medical Research Institute – IHMRI Wollongong Australia
| | - Giordano Biasi
- Centre for Medical Radiation Physics University of Wollongong Wollongong Australia
| | - Trent Causer
- Centre for Medical Radiation Physics University of Wollongong Wollongong Australia
- Illawarra Cancer Care Centre Wollongong Hospital Wollongong Australia
| | - Iolanda Fuduli
- Centre for Medical Radiation Physics University of Wollongong Wollongong Australia
| | - Owen J. Brace
- Centre for Medical Radiation Physics University of Wollongong Wollongong Australia
| | - Nauljun Stansook
- Department of Radiology Faculty of Medicine Mahidol University Bangkok Thailand
| | - Martin Carolan
- Centre for Medical Radiation Physics University of Wollongong Wollongong Australia
- Illawarra Cancer Care Centre Wollongong Hospital Wollongong Australia
- Illawarra Health and Medical Research Institute – IHMRI Wollongong Australia
| | - Anatoly B. Rosenfeld
- Centre for Medical Radiation Physics University of Wollongong Wollongong Australia
- Illawarra Health and Medical Research Institute – IHMRI Wollongong Australia
| | - Marco Petasecca
- Centre for Medical Radiation Physics University of Wollongong Wollongong Australia
| |
Collapse
|
4
|
Matar FS, Wilkinson D, Davis J, Biasi G, Causer T, Fuduli I, Brace O, Stansook N, Carolan M, Rosenfeld AB, Petasecca M. Quality assurance of VMAT on flattened and flattening filter-free accelerators using a high spatial resolution detector. J Appl Clin Med Phys 2020; 21:44-52. [PMID: 32277745 PMCID: PMC7324694 DOI: 10.1002/acm2.12864] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 02/24/2020] [Accepted: 02/26/2020] [Indexed: 01/02/2023] Open
Abstract
PURPOSE This study investigated the use of high spatial resolution solid-state detectors (DUO and Octa) combined with an inclinometer for machine-based quality assurance (QA) of Volumetric Modulated Arc Therapy (VMAT) with flattened and flattening filter-free beams. METHOD The proposed system was inserted in the accessory tray of the gantry head of a Varian 21iX Clinac and a Truebeam linear accelerator. Mutual dependence of the dose rate (DR) and gantry speed (GS) was assessed using the standard Varian customer acceptance plan (CAP). The multi-leaf collimator (MLC) leaf speed was evaluated under static gantry conditions in directions parallel and orthogonal to gravity as well as under dynamic gantry conditions. Measurements were compared to machine log files. RESULTS DR and GS as a function of gantry angle were reconstructed using the DUO/inclinometer and in agreement to within 1% with the machine log files in the sectors of constant DR and GS. The MLC leaf speeds agreed with the nominal speeds and those extracted from the machine log files to within 0.03 cm s-1 . The effect of gravity on the leaf motion was only observed when the leaves traveled faster than the nominal maximum velocity stated by the vendor. Under dynamic gantry conditions, MLC leaf speeds ranging between 0.33 and 1.42 cm s-1 were evaluated. Comparing the average MLC leaf speeds with the machine log files found differences between 0.9% and 5.7%, with the largest discrepancy occurring under conditions of fastest leaf velocity, lowest DR and lowest detector signal. CONCLUSIONS The investigation on the use of solid-state detectors in combination with an inclinometer has demonstrated the capability to provide efficient and independent verification of DR, GS, and MLC leaf speed during dynamic VMAT delivery. Good agreement with machine log files suggests the detector/inclinometer system is a useful tool for machine-specific VMAT QA.
Collapse
Affiliation(s)
- F. S. Matar
- Centre for Medical Radiation PhysicsUniversity of WollongongWollongongAustralia
| | - D. Wilkinson
- Centre for Medical Radiation PhysicsUniversity of WollongongWollongongAustralia
- Illawarra Cancer Care CentreWollongong HospitalWollongongAustralia
| | - J. Davis
- Centre for Medical Radiation PhysicsUniversity of WollongongWollongongAustralia
- Illawarra Health and Medical Research Institute – IHMRIWollongongAustralia
| | - G. Biasi
- Centre for Medical Radiation PhysicsUniversity of WollongongWollongongAustralia
| | - T. Causer
- Centre for Medical Radiation PhysicsUniversity of WollongongWollongongAustralia
- Illawarra Cancer Care CentreWollongong HospitalWollongongAustralia
| | - I. Fuduli
- Centre for Medical Radiation PhysicsUniversity of WollongongWollongongAustralia
| | - O. Brace
- Centre for Medical Radiation PhysicsUniversity of WollongongWollongongAustralia
| | - N. Stansook
- Department of RadiologyFaculty of MedicineMahidol UniversityBangkokThailand
| | - M. Carolan
- Centre for Medical Radiation PhysicsUniversity of WollongongWollongongAustralia
- Illawarra Cancer Care CentreWollongong HospitalWollongongAustralia
- Illawarra Health and Medical Research Institute – IHMRIWollongongAustralia
| | - A. B. Rosenfeld
- Centre for Medical Radiation PhysicsUniversity of WollongongWollongongAustralia
- Illawarra Health and Medical Research Institute – IHMRIWollongongAustralia
| | - Marco Petasecca
- Centre for Medical Radiation PhysicsUniversity of WollongongWollongongAustralia
| |
Collapse
|
5
|
Utitsarn K, Biasi G, Stansook N, Alrowaili ZA, Petasecca M, Carolan M, Perevertaylo VL, Tomé WA, Kron T, Lerch MLF, Rosenfeld AB. Two-dimensional solid-state array detectors: A technique for in vivo dose verification in a variable effective area. J Appl Clin Med Phys 2019; 20:88-94. [PMID: 31609090 PMCID: PMC6839376 DOI: 10.1002/acm2.12744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 07/25/2019] [Accepted: 09/16/2019] [Indexed: 11/24/2022] Open
Abstract
Purpose We introduce a technique that employs a 2D detector in transmission mode (TM) to verify dose maps at a depth of dmax in Solid Water. TM measurements, when taken at a different surface‐to‐detector distance (SDD), allow for the area at dmax (in which the dose map is calculated) to be adjusted. Methods We considered the detector prototype “MP512” (an array of 512 diode‐sensitive volumes, 2 mm spatial resolution). Measurements in transmission mode were taken at SDDs in the range from 0.3 to 24 cm. Dose mode (DM) measurements were made at dmax in Solid Water. We considered radiation fields in the range from 2 × 2 cm2 to 10 × 10 cm2, produced by 6 MV flattened photon beams; we derived a relationship between DM and TM measurements as a function of SDD and field size. The relationship was used to calculate, from TM measurements at 4 and 24 cm SDD, dose maps at dmax in fields of 1 × 1 cm2 and 4 × 4 cm2, and in IMRT fields. Calculations were cross‐checked (gamma analysis) with the treatment planning system and with measurements (MP512, films, ionization chamber). Results In the square fields, calculations agreed with measurements to within ±2.36%. In the IMRT fields, using acceptance criteria of 3%/3 mm, 2%/2 mm, 1%/1 mm, calculations had respective gamma passing rates greater than 96.89%, 90.50%, 62.20% (for a 4 cm SSD); and greater than 97.22%, 93.80%, 59.00% (for a 24 cm SSD). Lower rates (1%/1 mm criterion) can be explained by submillimeter misalignments, dose averaging in calculations, noise artifacts in film dosimetry. Conclusions It is possible to perform TM measurements at the SSD which produces the best fit between the area at dmax in which the dose map is calculated and the size of the monitored target.
Collapse
Affiliation(s)
- Kananan Utitsarn
- Centre for Medical Radiation Physics (CMRP)University of WollongongWollongongNSWAustralia
- Department of Medical ServicesLopburi Cancer HospitalLopburiThailand
| | - Giordano Biasi
- Centre for Medical Radiation Physics (CMRP)University of WollongongWollongongNSWAustralia
| | - Nauljun Stansook
- Centre for Medical Radiation Physics (CMRP)University of WollongongWollongongNSWAustralia
- Department of RadiologyFaculty of MedicineMahidol UniversityBangkokThailand
| | - Ziyad A. Alrowaili
- Centre for Medical Radiation Physics (CMRP)University of WollongongWollongongNSWAustralia
- Physics DepartmentCollege of ScienceJouf UniversitySakakaSaudi Arabia
| | - Marco Petasecca
- Centre for Medical Radiation Physics (CMRP)University of WollongongWollongongNSWAustralia
| | - Martin Carolan
- Illawarra Cancer Care Centre (ICCC)Wollongong HospitalWollongongNSWAustralia
| | | | - Wolfgang A. Tomé
- Department of Radiation OncologyAlbert Einstein College of MedicineNew York CityNYUSA
| | - Tomas Kron
- Centre for Medical Radiation Physics (CMRP)University of WollongongWollongongNSWAustralia
- Department of Physical SciencesPeter MacCallum Cancer CentreMelbourneVic.Australia
- Sir Peter MacCallum Cancer InstituteUniversity of MelbourneMelbourneVic.Australia
| | - Michael L. F. Lerch
- Centre for Medical Radiation Physics (CMRP)University of WollongongWollongongNSWAustralia
| | - Anatoly B. Rosenfeld
- Centre for Medical Radiation Physics (CMRP)University of WollongongWollongongNSWAustralia
| |
Collapse
|
6
|
Stansook N, Biasi G, Utitsarn K, Petasecca M, Metcalfe P, Carolan M, Lerch MLF, Perevertaylo VL, Kron T, Rosenfeld AB. 2D monolithic silicon-diode array detectors in megavoltage photon beams: does the fabrication technology matter? A medical physicist's perspective. Australas Phys Eng Sci Med 2019. [PMID: 30790139 DOI: 10.1007/s13246-019-00736-7/figures/10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
A family of prototype 2D monolithic silicon-diode array detectors (MP512, Duo, Octa) has been proposed by the Centre for Medical Radiation Physics, University of Wollongong (Australia) for relative dosimetry in small megavoltage photon beams. These detectors, which differ in the topology of their 512 sensitive volumes, were originally fabricated on bulk p-type substrates. More recently, they have also been fabricated on epitaxial p-type substrates. In the literature, their performance has been individually characterized for quality assurance (QA) applications. The present study directly assessed and compared that of a MP512-bulk and that of a MP512-epitaxial in terms of radiation hardness, long-term stability, response linearity with dose, dose per pulse and angular dependence. Their measurements of output factors, off-axis ratios and percentage depth doses in square radiation fields collimated by the jaws and produced by 6 MV and 10 MV flattened photon beams were then benchmarked against those by commercially available detectors. The present investigation was aimed at establishing, from a medical physicist's perspective, how the bulk and epitaxial fabrication technologies would affect the implementation of the MP512s into a QA protocol. Based on results, the MP512-epitaxial would offer superior radiation hardness, long-term stability and achievable uniformity and reproducibility of the response across the 2D active area.
Collapse
Affiliation(s)
- N Stansook
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia
- Department of Radiology, Faculty of Medicine, Mahidol University, Bangkok, Thailand
| | - G Biasi
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia
| | - K Utitsarn
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia
- Department of Medical Services, Lopburi Cancer Hospital, Lopburi, Thailand
| | - M Petasecca
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia
- Illawarra Health and Medical Research Institute (IHMRI), Wollongong, Australia
| | - P Metcalfe
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia
| | - M Carolan
- Illawarra Health and Medical Research Institute (IHMRI), Wollongong, Australia
- Illawarra Cancer Care Centre (ICCC), Wollongong, Australia
| | - M L F Lerch
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia
- Illawarra Health and Medical Research Institute (IHMRI), Wollongong, Australia
| | | | - T Kron
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia
- Peter MacCallum Cancer Centre, Melbourne, Australia
- Sir Peter MacCallum Cancer Institute, University of Melbourne, Melbourne, Australia
| | - A B Rosenfeld
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia.
- Illawarra Health and Medical Research Institute (IHMRI), Wollongong, Australia.
| |
Collapse
|
7
|
Stansook N, Biasi G, Utitsarn K, Petasecca M, Metcalfe P, Carolan M, Lerch MLF, Perevertaylo VL, Kron T, Rosenfeld AB. 2D monolithic silicon-diode array detectors in megavoltage photon beams: does the fabrication technology matter? A medical physicist's perspective. Australas Phys Eng Sci Med 2019; 42:443-451. [PMID: 30790139 DOI: 10.1007/s13246-019-00736-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Accepted: 02/19/2019] [Indexed: 01/24/2023]
Abstract
A family of prototype 2D monolithic silicon-diode array detectors (MP512, Duo, Octa) has been proposed by the Centre for Medical Radiation Physics, University of Wollongong (Australia) for relative dosimetry in small megavoltage photon beams. These detectors, which differ in the topology of their 512 sensitive volumes, were originally fabricated on bulk p-type substrates. More recently, they have also been fabricated on epitaxial p-type substrates. In the literature, their performance has been individually characterized for quality assurance (QA) applications. The present study directly assessed and compared that of a MP512-bulk and that of a MP512-epitaxial in terms of radiation hardness, long-term stability, response linearity with dose, dose per pulse and angular dependence. Their measurements of output factors, off-axis ratios and percentage depth doses in square radiation fields collimated by the jaws and produced by 6 MV and 10 MV flattened photon beams were then benchmarked against those by commercially available detectors. The present investigation was aimed at establishing, from a medical physicist's perspective, how the bulk and epitaxial fabrication technologies would affect the implementation of the MP512s into a QA protocol. Based on results, the MP512-epitaxial would offer superior radiation hardness, long-term stability and achievable uniformity and reproducibility of the response across the 2D active area.
Collapse
Affiliation(s)
- N Stansook
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia.,Department of Radiology, Faculty of Medicine, Mahidol University, Bangkok, Thailand
| | - G Biasi
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia
| | - K Utitsarn
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia.,Department of Medical Services, Lopburi Cancer Hospital, Lopburi, Thailand
| | - M Petasecca
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia.,Illawarra Health and Medical Research Institute (IHMRI), Wollongong, Australia
| | - P Metcalfe
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia
| | - M Carolan
- Illawarra Health and Medical Research Institute (IHMRI), Wollongong, Australia.,Illawarra Cancer Care Centre (ICCC), Wollongong, Australia
| | - M L F Lerch
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia.,Illawarra Health and Medical Research Institute (IHMRI), Wollongong, Australia
| | | | - T Kron
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia.,Peter MacCallum Cancer Centre, Melbourne, Australia.,Sir Peter MacCallum Cancer Institute, University of Melbourne, Melbourne, Australia
| | - A B Rosenfeld
- Centre for Medical Radiation Physics (CMRP), University of Wollongong, Wollongong, Australia. .,Illawarra Health and Medical Research Institute (IHMRI), Wollongong, Australia.
| |
Collapse
|
8
|
Stansook N, Utitsarn K, Petasecca M, Newall MK, Duncan M, Nitschke K, Carolan M, Metcalfe P, Lerch MLF, Perevertaylo VL, Tomé WA, Rosenfeld AB. Technical Note: Angular dependence of a 2D monolithic silicon diode array for small field dosimetry. Med Phys 2017; 44:4313-4321. [PMID: 28556261 DOI: 10.1002/mp.12377] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Revised: 05/22/2017] [Accepted: 05/22/2017] [Indexed: 11/07/2022] Open
Abstract
PURPOSE This study aims to investigate the 2D monolithic silicon diode array size of 52 × 52 mm2 (MP512) angular response. An angular correction method has been developed that improves the accuracy of dose measurement in a small field. METHODS The MP512 was placed at the center of a cylindrical phantom, irradiated using 6 MV and 10 MV photons and incrementing the incidence of the beam angle in 15° steps from 0° to 180°, and then in 1° steps between 85° and 95°. The MP512 response was characterized for square field sizes varying between 1 × 1 cm2 and 10 × 10 cm2 . The angular correction factor was obtained as the ratio of MP512 response to EBT3 film measured doses as a function of the incidence angle (Ɵ) and was normalized at 0° incidence angle. Beam profiles of the corrected MP512 responses were compared with the EBT3 responses to verify the effectiveness of the method adopted. RESULTS The intrinsic angular dependence of the MP512 shows maximum relative deviation from the response normalized to 0° of 18.5 ± 0.5% and 15.5 ± 0.5% for 6 MV and 10 MV, respectively, demonstrating that the angular response is sensitive to the energy. In contrast, the variation of angular response is less affected by field size. Comparison of cross-plane profiles measured by the corrected MP512 and EBT3 shows an agreement within ±2% for all field sizes when the beams irradiated the array at 0°, 45°, 135°, and 180° angles of incidence from the normal to the detector plane. At 90° incidence, corresponding to a depth dose measurement, up to a 6% discrepancy was observed for a 1 × 1 cm2 field of 6 MV. CONCLUSION An angular correction factor can be adopted for small field sizes. Measurements discrepancies could be encountered when irradiating with very small fields parallel to the detector plane. Using this approach, the MP512 is shown to be a suitable detector for 2D dose mapping of small field size photon beams.
Collapse
Affiliation(s)
- Nauljun Stansook
- Centre for Medical Radiation Physics, University of Wollongong, NSW, 2500, Australia.,Division of Radiation Oncology, Department of Radiology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, 10400, Thailand
| | - Kananan Utitsarn
- Centre for Medical Radiation Physics, University of Wollongong, NSW, 2500, Australia
| | - Marco Petasecca
- Centre for Medical Radiation Physics, University of Wollongong, NSW, 2500, Australia.,Illawarra Heath Medical Research Institute, Wollongong, NSW, 2522, Australia
| | - Matthew K Newall
- Centre for Medical Radiation Physics, University of Wollongong, NSW, 2500, Australia
| | - Mitchell Duncan
- Centre for Medical Radiation Physics, University of Wollongong, NSW, 2500, Australia
| | - Kym Nitschke
- Illawarra Heath Medical Research Institute, Wollongong, NSW, 2522, Australia
| | - Martin Carolan
- Centre for Medical Radiation Physics, University of Wollongong, NSW, 2500, Australia.,Illawarra Heath Medical Research Institute, Wollongong, NSW, 2522, Australia.,Illawarra Cancer Care Centre, Wollongong Hospital, Wollongong, NSW, 2500, Australia
| | - Peter Metcalfe
- Centre for Medical Radiation Physics, University of Wollongong, NSW, 2500, Australia
| | - Michael L F Lerch
- Centre for Medical Radiation Physics, University of Wollongong, NSW, 2500, Australia.,Illawarra Heath Medical Research Institute, Wollongong, NSW, 2522, Australia
| | | | - Wolfgang A Tomé
- Centre for Medical Radiation Physics, University of Wollongong, NSW, 2500, Australia.,Department of Radiation Oncology, Albert Einstein College of Medicine, NY, 10461, USA
| | - Anatoly B Rosenfeld
- Centre for Medical Radiation Physics, University of Wollongong, NSW, 2500, Australia.,Illawarra Heath Medical Research Institute, Wollongong, NSW, 2522, Australia
| |
Collapse
|
9
|
Stansook N, Petasecca M, Utitsarn K, Newall M, Metcalfe P, Carolan M, Lerch M, Rosenfeld AB. The angular dependence of a two dimensional monolithic detector array for dosimetry in small radiation fields. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1742-6596/777/1/012020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
10
|
Rutchantuek S, Stansook N, Changkaew P, Sakulsingharoj S. EP-1540: The accuracy of dose calculation in wedge fields of the Analytical Anisotropic Algorithm for 6 and 10 MV photon beams. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31658-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
11
|
Changkaew P, Stansook N, Khachonkham S, Piriyasang D, Sakulsingharoj S, Tangboonduangjit P. SU-E-T-348: Commissioning of An Independent Monitor Unit Verification Program (RadCalc Version 6.1) in Photon Point Dose Calculation. Med Phys 2011. [DOI: 10.1118/1.3612302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
12
|
Stansook N, Boonkitticharoen V, Dhanachai M. SU-FF-T-488: Estimation of Alpha/beta Ratio for Benign Tumor of the Brain From Clinical Data. Med Phys 2009. [DOI: 10.1118/1.3181986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|