Metal Kalça Protezi Varlığında Eclipse Tedavi Planlama Sisteminin Doz Hesaplama Doğruluğunun Termolüminesans Dozimetreler ile Araştırılması
Abstract
Amaç: Bu çalışmada kalça protezi olan radyoterapi hastalarında kullanılan farklı tedavi planlama algoritmalarının doz hesaplama doğruluğu araştırıldı.
Yöntem: Bu çalışmada 3D yazıcı kullanılarak bacağı taklit eden doku eşdeğeri silindirik bir fantom üretildi. Fantomun merkezine sırasıyla Co-Cr-Mo alaşımı ve Ti-6AI-4V alaşımı protezler yerleştirildi. Her iki protezin doz ölçümleri 92 noktada termolüminesan dozimetreler (TLD) ile alınmıştır. Radyoterapide yaygın olarak kullanılan Analitik Anizotropik Algoritma (AAA) ve Pencil Beam Convolution (PBC) algoritmalarının doz hesaplama doğruluğu ölçüm sonuçları ile karşılaştırıldı.
Bulgular: Co-Cr-Mo kalça protezi yüksek yoğunluğa sahip olduğundan, etrafına geri saçılan foton sayısı Ti-6AI-4V kalça protezinden daha yüksekti. Co-Cr-Mo alaşımının ortalama yüzey dozu 364.05 cGy iken, Ti-6AI-4V alaşımının ortalama yüzey dozu 347.79 cGy idi.
Sonuç: AAA ve PBC algoritmalarının doz tahmin yeteneklerinin kalça protezinin yoğunluğu arttıkça azaldığı gözlendi. Ayrıca AAA algoritması fantomdaki yüzey dozunu PBC algoritmasına göre daha iyi tahmin etti.
Project Number
21401102
References
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Investigation of Dose Calculation Accuracy of Eclipse Treatment Planning System in the Presence of Metal Hip Prosthesis with Thermoluminescence Dosimeters
Abstract
Aim: This study investigated the dose calculation accuracy of different treatment planning algorithms used in radiotherapy patients with hip prostheses.
Method: The current research produced a tissue-equivalent cylindrical phantom that imitates a leg using a 3D printer. Co-Cr-Mo alloy and Ti-6AI-4V alloy prostheses were placed in the centre of the phantom, respectively. Both prostheses' dose measurements were taken with thermoluminescent dosimeters (TLD) at 92 points. The dose calculation accuracy of the Analytical Anisotropic Algorithm (AAA) and Pencil Beam Convolution (PBC) algorithms, widely used in radiotherapy, were compared with the measurement results.
Results: Since the Co-Cr-Mo hip prosthesis has a high density, the number of backscattered photons around it was higher than the Ti-6AI-4V hip prosthesis. The average surface dose of the Co-Cr-Mo alloy was 364.05 cGy, while the average surface dose of the Ti-6AI-4V alloy was 347.79 cGy.
Conclusion: It was observed that the dose estimation abilities of the AAA and PBC algorithms decreased as the density of the hip replacement increased. In addition, the AAA algorithm predicted the surface dose in the phantom better than the PBC algorithm.
Ethical Statement
This study was supported by the Scientific Research Projects (BAP) Grants Unit, Selcuk University, Konya, TURKEY [Grant Number: 21401102].
Supporting Institution
Selcuk University
Project Number
21401102
References
- 1. Antapur P, Mahomed N, Gandhi R. Fractures in the elderly: When is hip replacement a necessity? Clin Interv Aging. 2011;6:1-7. doi: 10.2147/CIA.S10204.
- 2. Wang Y. Current concepts in developmental dysplasia of the hip and total hip arthroplasty. Arthroplasty. 2019;1(1). doi: 10.1186/s42836-019-0004-6.
- 3. Rahmouni K, Besnard A, Oulmi K, Nouveau C, Hidoussi A, et al. In vitro corrosion response of CoCrMo and Ti-6Al-4V orthopedic implants with Zr columnar thin films. Surface and Coatings Technology. 2022;436-444. doi: 10.1016/j.surfcoat.2022.128310.
- 4. Abdul Aziz MZ, Mohd Kamarulzaman FN, Mohd Termizi NAS, Abdul Raof N, Tajuddin AA. Effects of density from various hip prosthesis materials on 6 MV photon beam: A Monte Carlo study. Journal of Radiotherapy in Practice. 2017;16(2):155-160. doi: 10.1017/s1460396917000012.
- 5. Palleri F, Baruffaldi F, Angelini AL, Ferri A, Spezi E. Monte Carlo characterization of materials for prosthetic implants and dosimetric validation of Pinnacle3 TPS. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 2008;266(23):5001-5006. doi: 10.1016/j.nimb.2008.08.013.
- 6. Wellenberg RHH, Boomsma MF, Van Osch JAC, et al. Quantifying metal artefact reduction using virtual monochromatic dual-layer detector spectral CT imaging in unilateral and bilateral total hip prostheses. European Journal of Radiology. 2017;88:61-70. doi: 10.1016/j.ejrad.2017.01.002.
- 7. Çatlı S, Tanır G. Experimental and Monte Carlo evaluation of eclipse treatment planning system for effects on dose distribution of the hip prostheses. Medical Dosimetry. 2013;38(3):332-336. doi: 10.1016/j.meddos.2013.03.005.
- 8. De Martino F, Clemente S, Graeff C, Palma G, Cella L. Dose calculation algorithms for external radiation therapy: An overview for practitioners. Applied Sciences. 2021;11(15). doi: 10.3390/app11156806.
- 9. Flejmer AM, Dohlmar F, Nilsson M, Stenmarker M, Dasu A. Analytical anisotropic algorithm versus pencil beam convolution for treatment planning of breast cancer: Implications for target coverage and radiation burden of normal tissue. Anticancer Res. 2015;35(5):2841-2848.
- 10. Keehan S, Smith RL, Millar J, et al. Activation of hip prostheses in high energy radiotherapy and resultant dose to nearby tissue. Journal of Applied Clinical Medical Physics. 2017;18(2):100-105. doi: 10.1002/acm2.12058.
- 11. Paulu D, Alaei P. Evaluation of dose calculation accuracy of treatment planning systems at hip prosthesis interfaces. Journal of Applied Clinical Medical Physics. 2017;18(3):9-15. doi: 10.1002/acm2.12060.
- 12. Ojala J, Kapanen M, Sipilä P, Hyödynmaa S, Pitkänen M. The accuracy of Acuros XB algorithm for radiation beams traversing a metallic hip implant — comparison with measurements and Monte Carlo calculations. Journal of Applied Clinical Medical Physics. 2014;15(5):162-176. doi: 10.1120/jacmp.v15i5.4912.
- 13. Le Fèvre C, Brinkert D, Menoux I, et al. Effects of a metallic implant on radiotherapy planning treatment—experience on a human cadaver. Chinese Clinical Oncology. 2020;9(2):14-14. doi: 10.21037/cco.2020.01.09.
- 14. Rojas DMC, Pavoni JF, Arruda GV, Baffa O. Gel and thermoluminescence dosimetry for dose verifications of a real anatomy simulated prostate conformal radiation treatment in the presence of metallic femoral prosthesis. Journal of Applied Clinical Medical Physics. 2021;22(10):278-287. doi: 10.1002/acm2.13403.
- 15. Mohammadi K, Hassani M, Ghorbani M, Farhood B, Knaup C. Evaluation of the accuracy of various dose calculation algorithms of a commercial treatment planning system in the presence of hip prosthesis and comparison with Monte Carlo. Journal of Cancer Research and Therapeutics. 2017;0(0). doi: 10.4103/0973-1482.204903.
- 16. Gul OV, Buyukcizmeci N, Basaran H. Evaluation of surface dose for intensity modulated radiotherapy of head and neck cancer using thermoluminescent dosimeters. Gazi University Journal of Science Part A: Engineering and Innovation. 2022;9(2):156-163. doi: 10.54287/gujsa.1109112.
Details
| Primary Language | English |
|---|---|
| Subjects | Medical Physics |
| Journal Section | Articles |
| Authors | |
| Project Number | 21401102 |
| Early Pub Date | April 27, 2024 |
| Publication Date | April 30, 2024 |
| Submission Date | December 6, 2023 |
| Acceptance Date | March 13, 2024 |
| Published in Issue | Year 2024 Issue: 22 |
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