IJMPCERO  Vol.3 No.4 , November 2014
Systematic Analysis of the ArcCheck Diode Arrays for Tomotherapy Delivery Verification
Abstract: Objective: The aim of this study was to evaluate the functional characteristics of ArcCheck? array detectors and the application for Tomotherapy IMRT plan verification. Method and Materials: The basic character of the ArcCheck applying on Tomotherapy system was tested. The diode testing procedures included the followings: The short term reproducibility, linearity, dose rate dependence, the profile measurement compared to ion chamber. The effect of insert on gamma passing rate was also studied. A total number of 602 Tomotherapy Delivery Quality Assurance (DQA) plans were retrospectively analyzed to obtain the action limit results with statistical significance evaluation. Results: The short term reproducibility, linearity, dose rate dependence, profile to ion chamber correlation and clinical application were all compared with satisfactory outcome with this device. If anterior diode points were properly calibrated with machine absolute output, then there was no significant difference between the ArcCheck phantom with and without insert on gamma passing rate. The average passing rate was 97.5% and the recommend action level was established at 92% based on the 602 patients’ clinical data with 95% confidence level criteria. Conclusion: This comprehensive study shows that ArcCheck is an accurate and efficient device for quality assurance of Tomotherapy with remarkable consistency of 3D volume analysis of arc therapy.
Cite this paper: Yue, Q. , Duan, J. , Li, R. and Yang, J. (2014) Systematic Analysis of the ArcCheck Diode Arrays for Tomotherapy Delivery Verification. International Journal of Medical Physics, Clinical Engineering and Radiation Oncology, 3, 218-225. doi: 10.4236/ijmpcero.2014.34028.

[1]   Mackie, T.R., Holmes, T., Swerdloff, S., et al. (1993) Tomotherapy: A New Concept for the Delivery of Conformal Radiotherapy. Medical Physics, 20, 1709-1719.

[2]   Fenwick, J.D., Tomé, W.A., Jaradat, H.A., et al. (2004) Quality Assurance of a Helical Tomotherapy Machine. Physics in Medicine and Biology, 49, 2933-2953.

[3]   Thomas, S.D., Mackenzie, M., Field, G.C., et al. (2005) Patient Specific Treatment Verifications for Helical Tomotherapy Treatment Plans. Medical Physics, 32, 3793-800.

[4]   Langen, K.M., Papanikolaou, N., Balog, J., et al. (2010) QA for Helical Tomotherapy: Report of the AAPM Task GROUP 148. Medical Physics, 37, 4817-4853.

[5]   Delivery Quality Assurance Guide, Accuray Corporation.

[6]   Yan, Y., Papanikolaou, N., Weng, X., et al. (2005) Fast Radiographic Film Calibration Procedure for Helical Tomotherapy Intensity Modulated Radiation Therapy Dose Verification. Medical Physics, 32, 1566-1570.

[7]   Zhu, X.R., Jursinic, P.A., Grimm, D.F., et al. (2002) Evaluation of Kodak EDR2 Film for Dose Verification of Intensity Modulated Radiation Therapy Delivered by a Static Multileaf Collimator. Medical Physics, 31, 2284-2288.

[8]   Shi, C., Papanikolaou, N., Yan, Y., et al. (2006) Analysis of the Sources of Uncertainty for EDR2 Film-Based IMRT Quality Assurance. Journal of Applied Clinical Medical Physics, 25, 1-8.

[9]   Buonamici, F.B., Compagnucci, A., Marrazzo, L., et al. (2012) An Intercomparison between Film Dosimetry and Diode Matrix for IMRT Quality Assurance. Medical Physics, 39, 6339-6350.

[10]   Lewis, D., Micke, A., Yu, X. and Chan, M. (2014) An Efficient Protocol for Radiochromic Film Dosimetry Combining Calibration and Measurement in a Single Scan. Medical Physics, 13, 57-67.

[11]   Nelms, B.E., Zhen, H. and Tomé, W.A. (2011) Per-Beam, Planar IMRT QA Passing Rates Do Not Predict Clinically Relevant Patient Dose Errors. Medical Physics, 38, 1037-1044.

[12]   Jursinic, P.A. and Nelms, B.E. (2003) A 2-D Diode Array and Analysis Software for Verification of Intensity Modulated Radiation Therapy Delivery. Medical Physics, 30, 870-879.

[13]   Létourneau, D., Gulam, M., Yan, D., Oldham, M. and Wong, J.W. (2004) Evaluation of a 2D Diode Array for IMRT Quality Assurance. Radiology and Oncology, 70, 199-206.

[14]   Li, J.G., Yan, G. and Liu, C. (2009) Comparison of Two Commercial Detector Arrays for IMRT Quality Assurance. Journal of Applied Clinical Medical Physics, 10, 2942.

[15]   Chong, N.S., Lee, J.J.S., Kung, W.-H., et al. (2011) Patient Delivery Quality Assurance for Linac-Based IMRT and Helical Tomotherapy Using Solid State Detectors. Radiation Measurements, 46, 1993-1995.

[16]   Xu, S., Xie, C., Ju, Z., Dai, X., Gong, H., Wang, L. and Yang, J. (2010) Dose Verification of Helical Tomotherapy Intensity Modulated Radiation Therapy Planning Using 2D-Array Ion Chambers. Biomedical Imaging and Intervention Journal, 6, e24.

[17]   Li, G., Zhang, Y., Jiang, X., Bai, S., Peng, G., Wu, K. and Jiang, Q.F. (2013) Evaluation of the ArcCHECK QA System for IMRT and VMAT Verification. Physica Medica: European Journal of Medical Physics, 29, 295-303.

[18]   Feygelman, V., Zhang, G., Stevens, C. and Nelms, B.E. (2011) Evaluation of a New VMAT QA Device, or the “X” and “O” Array Geometries. Journal of Applied Clinical Medical Physics, 12, 3346.

[19]   (2008) ArcCheckTM Reference Guide. Sun Nuclear Corporation.

[20]   Depuydt, T., Van Esch, A. and Huyskens, D.P. (2002) A Quantitative Evaluation of IMRT Dose Distributions: Refinement and Clinical Assessment of the Gamma Evaluation. Radiotherapy and Oncology, 62, 309-319.

[21]   Ezzel, G.A., Burmeister, J.W., Dogan, N., et al. (2009) IMRT Commissioning: Multiple, Institution Planning and Dosimetry Comparisons, a Report from AAPM Task Group 119. Medical Physics, 36, 5359-5373.

[22]   Fakir, H., Gaede, S., Mulligan, M. and Chen, J.Z. (2012) Development of a Novel ArcCHECK Insert for Routine Quality Assurance of VMAT Delivery Including Dose Calculation with Inhomogeneities. Medical Physics, 39, 4203-4208.

[23]   Kim, J.I., Chung, J.B., Park, Y.K., et al. (2013) A Multi-Institutional Study for Tolerance and Action Levels of IMRT Dose Quality Assurance Measurements in Korea. Journal of Applied Clinical Medical Physics, 14, 3964.

[24]   Nelms, B.E., Chan, M.F., Jarry, G., Lemire, M., Lowden, J., Hampton, C. and Feygelman, V. (2013) Evaluating IMRT and VMAT Dose Accuracy: Practical Examples of Failure to Detect Systematic Errors When Applying a Commonly Used Metric and Action Levels. Medical Physics, 40, 111722.