On the calibration process of film dosimetry: OLS inverse regression versus WLS inverse prediction

Physics in Medicine and Biology

Volumn 53, Issue 14, 2008, Pages 3971-3984

  Crop, F ^a,b   Van Rompaye, B ^a   Paelinck, L ^b   Vakaet, L ^b   Thierens, H ^a   De Wagter, C ^b  

^a GHENT UNIVERSITY   (Belgium)

^b GHENT UNIVERSITY HOSPITAL   (Belgium)

Author keywords

[No Author keywords available]

Indexed keywords

CALIBRATION; CURVE FITTING; DATA FUSION; DOSIMETERS; DOSIMETRY; EIGENVALUES AND EIGENFUNCTIONS; ERRORS; FOOD PROCESSING; FORECASTING; GEODESY; HEALTH; INVERSE PROBLEMS; LEAD; LEAST SQUARES APPROXIMATIONS; MOIRE FRINGES; OPTIMIZATION; REGRESSION ANALYSIS; SENSOR DATA FUSION;

CALIBRATION CURVES; CALIBRATION PROCESSING; FILM CALIBRATION; FILM DOSIMETRY; GAFCHROMIC EBT; HETEROSCEDASTICITY; INSTITUTE OF PHYSICS; INVERSE PREDICTION; INVERSE REGRESSION; MONTE CARLO (MC); OPTICAL- (OPET); ORDINARY LEAST SQUARES; ORDINARY LEAST SQUARES (OLS); PREDICTION ERRORS; REFERENCE DOSIMETRY; REGRESSION (R2); SIMPLE LINEAR REGRESSION (SLR); WEIGHTED LEAST-SQUARES (WLS);

PARAMETER ESTIMATION;

ACCURACY; ARTICLE; CALIBRATION; DEVICE; DOSIMETRY; IRRADIATION; LINEAR ACCELERATOR; MONTE CARLO METHOD; PREDICTION; PRIORITY JOURNAL; RADIATION DOSE; RELIABILITY; TECHNOLOGY; X RAY FILM;

ARTIFACTS; CALIBRATION; FILM DOSIMETRY; LEAST-SQUARES ANALYSIS; REGRESSION ANALYSIS; SENSITIVITY AND SPECIFICITY; WORKLOAD;

EID: 47649101471     PISSN: 00319155     EISSN: 13616560     Source Type: Journal    
DOI: 10.1088/0031-9155/53/14/015     Document Type: Article

References (30)

1. Arfken G B and Weber H J 2001 Mathematical Methods for Physicists 5th edn (San Diego, CA: Harcourt Academic)
2. Bortfeld T 2006 IMRT: a review and preview Phys. Med. Biol. 51 R363-79
3. Brown P J 1993 Measurement, Regression and Calibration (Oxford: Clarendon)
4. Butson M J, Yu P K N, Cheung T and Inwood D 2003 Polarization effects on a high-sensitivity radiochromic film Phys. Med. Biol. 48 N207-11
5. Chetty I J and Charland P M 2002 Investigation of Kodak extended dose range (EDR) film for megavoltage photon beam dosimetry Phys. Med. Biol. 47 3629-41
6. Cheung T, Butson M J and Yu P K N 2005 Post irradiation coloration of Gafchromic EBT radiochromic film Phys. Med. Biol. 50 N281-5
7. Cheung T, Butson M J and Yu P K N 2006 Independance of calibration curves for EBT Gafchromic films of the size of high-energy x-ray fields Appl. Rad. Isot. 64 1027-30
8. Crop F, Reynaert N, Pittomvils G, Paelinck L, De Gersem W, De Wagter C, Vakaet L, De Neve W and Thierens H 2007 Monte Carlo modeling of the ModuLeaf miniature MLC for small field dosimetry and quality assurance of the clinical treatment planning system Phys. Med. Biol. 52 3275-90
9. Das I J, Ding G X and Ahnesjo A 2008 Small fields: nonequilibrium radiation dosimetry Med. Phys. 35 206-15
10. Davison A C and Hinkley D V 1997 Bootstrap Methods and Their Application (Cambridge: Cambridge University Press)
11. Devic S, Seuntjens J, Hegyi G, Podgorsak E B, Soares C G, Kirov A S, Ali I, Williamson J F and Elizondo A 2004 Dosimetric properties of improved GafChromic films for seven different digitizers Med. Phys. 31 2392-401
12. Devic S, Seuntjens J, Sham E, Podgorsak E B, Schmidtlein C R, Kirov A S and Soares C G 2005 Precise radiochromic film dosimetry using a flat-bed document scanner Med. Phys. 32 2245-53
13. Duggan D M and Coffey C W 1998 Small photon field dosimetry for stereotactic radiosurgery Med. Dosim. 23 153-9
14. Efron B 1979 Bootstrap methods: another look at the jackknife Ann. Stat. 7 1-26
15. Efron B 1981 Nonparametric estimates of standard error: the jackknife, the bootstrap and other methods Biometrika 68 589-99
16. Efron B 1982 The jackknife, the bootstrap and other resampling plans CBMS-NSF Conf. Ser. Appl. Math. vol 38
17. Efron B and Tibshirani R J 1993 An Introduction to the Bootstrap (New York: Chapman and Hall)
18. Francois N, Govaerts B and Boulanger B 2004 Optimal designs for inverse prediction in univariate nonlinear calibration models Chemometrics Intell. Lab. Syst. 74 283-92
19. Fuss M, Sturtewagen E, De Wagter C and Georg D 2007 Dosimetric characterization of GafChromic EBT film and its implication on film dosimetry quality assurance Phys. Med. Biol. 52 4211-25
20. Gill J L 1987 Biases in regression when prediction is inverse to causation J. Anim. Sci. 64 594-600
21. Gillis S and De Wagter C 2005 Practical and dosimetric implications of a new type of packaging for radiographic film Phys. Med. Biol. 50 N63-72
22. Kutner M H, Nachtsheim C J, Neter J and Li W 2005 Applied Linear Statistical Models 5th edn (New York: McGraw-Hill)
23. Martens C, Claeys I, De Wagter C and De Neve W 2002 The value of radiographic film for the characterization of intensity-modulated beams Phys. Med. Biol. 47 2221-34
24. Niroomand-Rad A, Blackwell C R, Coursey B M, Gall K P, Galvin J M, McLaughlin W L, Meigooni A S, Nath R, Rodgers J E and Soares C G 1998 Radiochromic film dosimetry: recommendations of AAPM Radiation Therapy Commitee Task Group 55 Med. Phys. 25 2093-115
25. Paelinck L, De Neve W and De Wagter C 2007 Precautions and strategies in using a commercial flatbed scanner for radiochromic film dosimetry Phys. Med. Biol. 52 231-42
26. Rink A, Vitkin I A and Jaffray D A 2005 Characterization and real-time optical measurements of the ionizing radiation dose response for a new radiochromic medium Med. Phys. 32 2510-6
27. R Development Core Team 2008 R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. ISBN 3-900051-07-0, available at http://www.R-project.org
28. Soares C G 2006 New developments in radiochromic film dosimetry Radiat. Prot. Dosim. 120 100-6
29. Van Battum L J, Hoffmans D, Piersma H and Heukelom S 2008 Accurate dosimetry with GafChromic EBT film of a 6 MV photon beam in water: what level is achievable? Med. Phys. 35 704-16
30. Zhang H et al 2008 Fractionated grid therapy in treating cervical cancers: conventional fractionation or hypofractionation Int. J. Rad. Onc. Biol. Phys. 70 280-8