We present the results of measurements made using the Vero4DRT radiation therapy system, which is not yet widely used, to assist technicians in achieving reliable and safe radiotherapy to the patient. We measured percent depth dose, beam profile, and relative scatter factor under water and air conditions. The Vero4DRT system has a 150 × 150-mm fixed secondary collimator. Its multileaf collimator (MLC) design is a single-focus type, with 30 pairs of 5 mm thick leaves at the isocenter, and produces a maximum field size of 150 × 150 mm. Profile measurements were performed using a 0.016-cm3 ionization chamber (PTW31016 pinpoint chamber; PTW, Freiburg GmbH Germany). A brass build-up cap was used for measurements obtained in air conditions. We present a useful measurement dataset for users of the Vero4DRT system.
References
[1]
Das, I.J., Cheng, C.W., Watts, R.J., et al. (2008) Accelerator Beam Data Commissioning Equipment and Procedures: Report of the TG-106 of the Therapy Physics Committee of the AAPM. Medical Physics, 35, 4186-4215. http://dx.doi.org/10.1118/1.2969070
[2]
Chang, Z., Wu, Q., Adamson, J., et al. (2012) Commissioning and Dosimetric Characteristics of TrueBeam System: Composite Data of Three TrueBeam Machines. Medical Physics, 39, 6981-7018. http://dx.doi.org/10.1118/1.4762682
[3]
Chang, Z., Wang, Z., Wu, Q.J., et al. (2008) Dosimetric Characteristics of Novalis Tx System with High Definition Multileaf Collimator. Medical Physics, 35, 4460-4463. http://dx.doi.org/10.1118/1.2977668
[4]
Kamino, Y., Takayama, K., Kokubo, M., et al. (2006) Development of a Four-Dimensional Image-Guided Radiotherapy System with a Gimbaled X-Ray Head. International Journal of Radiation Oncology*Biology*Physics, 66, 271-278.
[5]
Nakamura, M., Sawada, A., Ishihara, Y., et al. (2010) Dosimetric Characterization of a Multileaf Collimator for a New Four-Dimensional Image-Guided Radiotherapy System with a Gimbaled X-Ray Head, MHI-TM2000. Medical Physics, 37, 4684-4691. http://dx.doi.org/10.1118/1.3480510
[6]
Ishihara, Y., Sawada, A., Nakamura M., et al. (2014) Development of a Dose Verification System for Vero4DRT Using Monte Carlo Method. Journal of Applied Clinical Medical Physics, 15, 4961.
Mukumoto, N., Nakamura, M., Sawada, A., et al. (2013) Accuracy Verification of Infrared Marker-Based Dynamic Tumor-Tracking Irradiation Using the Gimbaled X-Ray Head of the Vero4DRT (MHI-TM2000). Medical Physics, 40, Article ID: 041706. http://dx.doi.org/10.1118/1.4794506
[9]
Depuydt, T., Verellen, D., Haas, O., et al. (2011) Geometric Accuracy of a Novel Gimbals Based Radiation Therapy Tumor Tracking System. Radiotherapy and Oncology, 98, 365-372. http://dx.doi.org/10.1016/j.radonc.2011.01.015
[10]
Miura, H., Osaza, S., Tsuda, S., et al. (2015) Beam Characteristics at Low Dose Monitor Unit Settings for Vero4DRT. International Journal of Medical Physics, Clinical Engineering and Radiation Oncology, 4, 284-289.
[11]
Yin, F.F., Zhu, J., Yan, H., et al. (2002) Dosimetric Characteristics of Novalis Shaped Beam Surgery Unit. Medical Physics, 29, 1729-1738. http://dx.doi.org/10.1118/1.1494830