Abstract
This paper compares dose volume histograms (DVHs) generated by the ADAC Pinnacle and the Nomos Corvus planning systems. Seven prostate cases and seven head and neck cases were selected for review. Plans computed on both systems possessed exactly the same anatomical contours and IMRT segments. The Pinnacle system used the collapsed cone convolution superposition, while Corvus employed a finite size pencil beam (FSPB) convolution. Prostate DVH results demonstrated similar DVH curves from both systems. For each structure, the ratio of Pinnacle dose value divided by Corvus value was calculated. The high dose structures (which might contain tumour) had ratios close to unity, while the low dose structures (the critical organs) had ratios farther away from unity. Almost all ratios were less than unity, indicating a systematic difference that Pinnacle calculated doses were lower than Corvus ones. Head and neck data provided similar findings. A possible cause for this discrepancy could be the beam modelling. The difference in DVH parameters that we discovered between the two systems was about the same order of magnitude as the measurement-computation difference. When low dose is critical, such difference may affect the clinical planning decision.
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Peterson, L.,Intensity Modulated Radiation Therapy Update, Trends in Medicine. 1–3, March 2003.
Bedford, J. L., Childs, P. J., Nordmark, Hansen V., Mosleh-Shirazi, M. A., Verhaegen, F., Warrington, A. P.,Commissioning and quality assurance of the Pinnacle(3) radiotherapy treatment planning system for external beam photons, Br J Radiol. 76:163–176, 2003.
Linthout, N., Verellen, D., Van Acker, S., Voordeckers, M., Bretz, A., Storme, G.,Evaluation of dose calculation algorithms for dynamic arc treatments of head and neck tumors, Radiother Oncol. 64:85–95, 2002.
Gifford, K. A., Followill, D. S., Liu, H. H., Starkschall, G.,Verification of the accuracy of a photon dose-calculation Algorithm, J Appl Clin Med Phys. 3:26–45, 2002.
Dong, L., Antolak, J., Salehpour, M., Forster, K., O’Neill, L., Kendall, R., Rosen, I.,Patient-specific point dose measurement for IMRT monitor unit verification, Int J Radiat Oncol Biol Phys. 56:867–877, 2003.
Yang, Y., Xing, L., Li, J. G., Palta, J., Chen, Y., Luxton, G., Boyer, A.,Independent dosimetric calculation with inclusion of head scatter and MLC transmission for IMRT, Med Phys. 30:2937–2947, 2003.
Ma, C. M., Jiang, S. B., Pawlicki, T., Chen, Y., Li, J. S., Deng, J., Boyer, A. L.,A quality assurance phantom for IMRT dose Verification, Phys Med Biol. 48:561–572, 2003.
ICRU Report 50: Prescribing, recording, and reporting photon beam therapy, International Commission on Radiation Units and Measurements, Bethesda, 1993.
Digital Imaging and Communications in Medicine (DICOM), National Electrical Manufacturers Association, Rosslyn, 2003.
Mackie, T. R., Scrimger, J. W., Battista, J. J.,A convolution method of calculating dose for 15-MV x rays, Med Phys. 12:188–196, 1985.
Mackie, T. R., Olivera, G. H., Reckwerdt, P. J., Shepard, D. M.Convolution/superposition photon dose algorithm, in AAPM Monograph 26, General practice of radiation oncology physics in the 21st century. Medical Physical Publishing, Madison, 2000.
Lydon, J. M.,Photon dose calculations in homogeneous media for a treatment planning system using a collapsed cone superposition convolution algorithm, Phys Med Biol. 43:1813–1822, 1998.
Bourland, J. D., Chaney, E. L.,A finite-size pencil beam model for photon dose calculations in three dimensions. Med Phys. 19:1401–1412, 1992.
Nizin, P. S., Kania, A., Ayyangar, K.,Basic concepts of CORVUS dose model, Med Dosim. 26:65–69, 2001.
Ostapiak, O. Z., Zhu, Y., Van Dyk, J.,Refinements of the finite-size pencil beam model of three-dimensional photon dose calculation, Med Phys. 24:743–750, 1997.
Saw, C. B., Ayyangar, K. M., Zhen, W., Thompson, R. B., Enke, C. A.,Commissioning and quality assurance for MLC-based IMRT, Med Dosim. 26:125–133, 2001.
Ayyangar, K. M., Saw, C. B., Gearheart, D., Shen, B., Thompson, R.,Independent calculations to validate monitor units from ADAC treatment planning system Med Dosim. 28:79–83, 2003.
Ayyangar, K. M., Nizin, P. S., Saw, C. B., Gearheart, D., Shen, B., Enke, C. A.,Independent dose calculations for the corvus MLC IMRT, Med Dosim. 26:135–141, 2001.
Fraass, B., Doppke, K., Hunt, M., Kutcher, G., Starkschall, G., Stern, R., Van Dyke, J.,American Association of Physicists in Medicine Radiation Therapy Committee Task Group 53: quality assurance for clinical radiotherapy treatment planning, Med Phys. 25:1773–1829, 1998.
Radiation Therapy Oncology Group RTOG P-0126 protocol: A phase III randomized study of high dose 3D-CRT versus standard dose 3D-CRT in patients treated for localized prostate cancer, American College of Radiology, Philadelphia, 2004.
Starkschall, G., Steadham, R. E. Jr, Popple, R. A., Ahmad, S., Rosen, I. I.,Beam-commissioning methodology for a three-dimensional convolution/superposition photon dose algorithm, J Appl Clin Med Phys. 1:8–27, 2000.
Yu, Y., Waterman, F. M., Suntharalingam, N., Schulsinger, A.,Limitations of the minimum peripheral dose as a parameter for dose specification in permanent 125I prostate implants, Int J Radiat Oncol Biol Phys. 34:717–725, 1996.
Roesink, J. M., Moerland, M. A., Hoekstra, A., Van Rijk, P. P., Terhaard, C. H.,Scintigraphic assessment of early and late parotid gland function after radiotherapy for head-and-neck cancer: a prospective study of dose-volume response relationships, Int J Radiat Oncol Biol Phys. 58:1451–1460, 2004.
Roesink, J. M., Moerland, M. A., Battermann, J. J., Hordijk, G. J., Terhaard, C. H.,Quantitative dose-volume response analysis of changes in parotid gland function after radiotherapy in the head-and-neck region, Int J Radiat Oncol Biol Phys. 51:938–946, 2001.
Eisbruch, A., Ten Haken, R. K., Kim, H. M., Marsh, L. H., Ship, J. A.,Dose, volume, and function relationships in parotid salivary glands following conformal and intensity-modulated irradiation of head and neck cancer, Int J Radiat Oncol Biol Phys. 45:577–587, 1999.
Pawlicki, T., Luxton, G., Le, Q. T., Findley, D., Ma, C. M.,Lens dose in MLC-based IMRT treatments of the head and Neck, Int J Radiat Oncol Biol Phys. 59:293–299, 2004.
Kalapurakal, J. A., Sathiaseelan, V., Bista, T., Marymont, M. H.,Adverse impact of multileaf collimator field shaping on lens dose in children with acute leukemia receiving cranial irradiation, Int J Radiat Oncol Biol Phys. 48:1227–1231, 2000.
Henk, J. M., Whitelocke, R. A., Warrington, A. P., Bessell, E. M.,Radiation dose to the lens and cataract formation, Int J Radiat Oncol Biol Phys. 25:815–820, 1993.
Schwarz, M., Bos, L. J., Mijnheer, B. J., Lebesque, J. V., Damen, E. M.,Importance of accurate dose calculations outside segment edges in intensity modulated radiotherapy treatment planning, Radiother Oncol. 69:305–314, 2003.
Diallo, I., Lamon, A., Shamsaldin, A., Grimaud, E., de Vathaire, F., Chavaudra, J.,Estimation of the radiation dose delivered to any point outside the target volume per patient treated with external beam radiotherapy, Radiother Oncol. 38:269–271, 1996.
van der Giessen, P. H.,Calculation and measurement of the dose at points outside the primary beam for photon energies of 6, 10, and 23 MV, Int J Radiat Oncol Biol Phys. 30:1239–1246, 1994.
Hall, E. J., Wuu, C. S.,Radiation-induced second cancers: the impact of 3D-CRT and IMRT, Int J Radiat Oncol Biol Phys. 56:83–88, 2003.
Horwich, A., Swerdlow, A. J.,Second primary breast cancer after Hodgkin’s disease, Br J Cancer. 90:294–298, 2004.
Marks, L. B., Yu, X., Vujaskovic, Z., Small, W. Jr, Folz, R., Anscher, M. S.,Radiation-induced lung injury, Semin Radiat Oncol. 13:333–345, 2003.
Jereczek-Fossa, B. A., Alterio, D., Jassem, J., Gibelli, B., Tradati, N., Orecchia, R.,Radiotherapy-induced thyroid disorders. Cancer Treat Rev. 30:369–384, 2004.
Bruce, S. D.,Radiation-induced xerostomia: how dry is your patient? Clin J Oncol Nurs. 8:61–67, 2004.
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Ayyangar, K.M., Fung, A.Y.C., Li, S. et al. Dose volume histogram comparison between ADAC Pinnacle and Nomos Corvus systems for IMRT. Australas. Phys. Eng. Sci. Med. 28, 1 (2005). https://doi.org/10.1007/BF03178857
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DOI: https://doi.org/10.1007/BF03178857