This article describes some aspects of the implementation of the system in vivo dosimetry PerFraction with the linear accelerator Elekta Synergy Platform. The first results of in vivo dosimetry application are presented in comparison with the results of 3D phantom-based ArcCHECK dosimetry.

1. H. Zhen, B. E. Nelms, W. A. Tome, “Moving from gamma passing rates to patient DVH-based QA metrics in pretreatment dose QA,” Med. Phys., vol. 38, no. 10, pp. 5477 – 5489, Oct. 2011.
   DOI: 10.1118/1.3633904
   PMid: 21992366
2. B. Mijnheer, S. Beddar, J. Izewska, C. Reft, “In vivo dosimetry in external beam radiotherapy,” Med. Phys., vol. 40, no. 7, Jul. 2013.
   DOI: 10.1118/1.4811216
   PMid: 23822404
3. M. Sabet, F. W. Menk, P. B. Greer, “Evaluation of an a-Si EPID in direct detection configuration as a water-equivalent dosimeter for transit dosimetry,” Med. Phys., vol. 37, no. 4, pp. 1459 – 1467, Apr. 2010.
   DOI: 10.1118/1.3327456
   PMid: 20443467
4. A. Mans et al., “Catching errors with in vivo EPID dosimetry,” Med. Phys., vol. 37, no. 6, pp. 2638 – 2644, Jun. 2010.
   DOI: 10.1118/1.3397807
   PMid: 20632575
5. A. H. Zhuang, A. J. Olch, “Sensitivity study of an automated system for daily patient QA using EPID exit dose images,” J. Appl. Clin. Med. Phys., vol. 19, no. 3, pp. 114 – 124, May 2018.
   DOI: 10.1002/acm2.12303
   PMid: 29508529
   PMCid: PMC5978566
6. C. Bojechko, M. Phillps, A. Kalet, E. C. Ford, “A quantification of the effectiveness of EPID dosimetry and software-based plan verification systems in detecting incidents in radiotherapy,” Med. Phys., vol. 42, no. 9, pp. 5363 – 5369, Sep. 2015.
   DOI: 10.1118/1.4928601
   PMid: 26328985
7. I. Olaciregui-Ruiz, R. Rozendaal, B. Mijnheer, A. Mans, “Site-specific alert criteria to detect patient-related errors with 3D EPID transit dosimetry,” Med. Phys., vol. 46, no. 1, pp. 45 – 55, Jan. 2019.
   DOI: 10.1002/mp.13265
   PMid: 30372521
8. S. Bresciani, L. Botez, A. Miranti, M. Stasi, “In Vivo dosimetry using CBCT and EPID device: analysis of sources of errors in VMAT treatments”, Radiother. Oncol., vol. 133, suppl. 1, pp. 249 – 250, Apr. 2019.
   DOI: 10.1016/S0167-8140(19)30904-1
9. R. Jacques, J. Wong, R. Taylor, T. McNutt, ”Real-time dose computation: GPU-accelerated source modeling and superposition/convolution,” Med. Phys., vol. 38, no. 1, pp. 294 – 305, Jan. 2011.
   DOI: 10.1118/1.3483785
   PMid: 21361198
10. S. Ahmed et al., “Validation of a GPU-Based 3D dose calculator for modulated beams,” J. Appl. Clin. Med. Phys., vol. 18, no. 3, pp. 73 – 82,May 2017.
    DOI: 10.1002/acm2.12074
    PMid: 28371377
    PMCid: PMC5689856
11. EPID Dosimetry in SunCHECK™ Patient: EPID Calibration, Pre-Treatment QA and In-Vivo Monitoring, Sun Nucl. Corp., Melbourne (FL), USA.
    Retrieved from: https://www.sunnuclear.com/documents/whitepapers/EPID-Dosimetry_in-SC_Patient_021519.pdf
    Retrieved on: Dec. 12, 2018