On the uncertainties in effective dose estimates of adult CT head scans

Medical Physics

Volumn 35, Issue 8, 2008, Pages 3501-3510

  Gregory, Kent J ^a,b   Bibbo, Giovanni ^b,c   Pattison, John E ^b  

^a ROYAL ADELAIDE HOSPITAL   (Australia)

^b UNIVERSITY OF SOUTH AUSTRALIA   (Australia)

^c WOMEN S AND CHILDREN S HOSPITAL   (Australia)

Author keywords

CT; Effective dose; Error; Measurement uncertainty

Indexed keywords

ERRORS; EXHIBITIONS; UNCERTAINTY ANALYSIS;

ADULT PATIENTS; CONFIDENCE INTERVAL; CT IMAGING; DOSE-LENGTH PRODUCTS; EFFECTIVE DOSE; MEASUREMENT UNCERTAINTY; PENCIL IONIZATION CHAMBERS; RADIATION-INDUCED CANCER;

COMPUTERIZED TOMOGRAPHY;

ARTICLE; COMPUTED TOMOGRAPHY SCANNER; COMPUTER ASSISTED TOMOGRAPHY; COMPUTER PROGRAM; DOSE CALCULATION; INTERMETHOD COMPARISON; IONIZATION CHAMBER; NEUROIMAGING; PRIORITY JOURNAL; RADIATION DOSE;

EID: 48349111470     PISSN: 00942405     EISSN: None     Source Type: Journal    
DOI: 10.1118/1.2952359     Document Type: Article

References (37)

1. D. Hart and B. F. Wall, " UK population dose from medical x-ray examinations.," Eur. J. Radiol. 0720-048X 10.1016/S0720-048X(03)00178-5 50, 285-291 (2004).
2. P. C. Shrimpton, D. G. Jones, M. C. Hillier, B. F. Wall, J. C. Le Heron, and K. Faulkner, Survey of CT Practice in the UK Part 2: Dosimetric Aspects, National Radiological Protection Board-R249, Chilton, UK, 1991 (unpublished).
3. H. D. Nagel, Radiation Exposure in Computed Tomography. Fundamentals, Influencing Parameters, Dose Assessment, Optimization, Scanner Data, Terminology, 4th ed. (CTB Publications, Hamburg, Germany, 2002).
4. W. A. Kalender, B. Schmidt, M. Zankl, and M. Schmidt, " A PC program for estimating organ dose and effective dose values in computed tomography.," Eur. Radiol. 9, 555-562 (1999). 0938-7994
5. D. G. Jones and P. C. Shrimpton, Survey of CT Practice in the UK Part 3: Normalised Organ Doses Calculated using Monte Carlo Techniques, National Radiological Protection Board-R250, Chilton, UK, 1992 (unpublished).
6. D. G. Jones and P. C. Shrimpton, Normalised Organ Doses for X-Ray Computed Tomography Calculated using Monte Carlo Techniques, National Radiological Protection Board-SR250, Chilton, UK, 1992 (unpublished).
7. P. C. Shrimpton and D. G. Jones, " Normalised organ doses for x-ray computed tomography calculated using Monte Carlo techniques and a mathematical anthropomorphic phantom.," Radiat. Prot. Dosimetry 49, 241-243 (1993). 0144-8420
8. M. Cristy, " Mathematical phantoms Representing children of various ages for use in estimates of internal dose.," Report ORNL/NUREG/TM-367 (Oak Ridge National Laboratory, Oak Ridge, TN, 1980).
9. M. Zankl, W. Panzer, and G. Drexler, The calculation of dose from external photon exposures using reference human phantoms and Monte Carlo methods Part VI: Organ doses from computed tomographic examinations, GSF Report No. 30/91, Neuherberg, Germany, 1991 (unpublished).
10. R. Kramer, M. Zankl, G. Williams, and G. Drexler, The calculation of dose from external photon exposures using reference human phantoms and Monte Carlo methods Part I: The male (Adam) and female (Eva) adult mathematical phantoms, GSF Report No. S-885, Neuherberg, Germany, 1982 (unpublished).
11. CTDosimetry, CT Patient Dosimetry Calculator, version 0.99x ImPACT internet home page http://www.impactscan.org, 2006.
12. P. C. Shrimpton, Assessment of Patient Dose in CT, National Radiological Protection Board, PE/1/2004, Oxon, UK, 2004 (unpublished).
13. BEIR VII, Health Effects of Exposure to Low Levels of Ionizing Radiations-Phase 2 (The National Academies Press, Washington, 2006).
14. C. J. Martin, " Effective dose: How should it be applied to medical exposures?," Br. J. Radiol. 0007-1285 10.1259/bjr/25922439 80, 639-647 (2007).
15. ICRP, Recommendations of the International Commission on Radiological Protection, ICRP 60 (Pergamon, Oxford, 1991).
16. ICRP, Recommendations of the International Commission on Radiological Protection, ICRP 103 (Pergamon, Oxford, 2008).
17. M. Caon, G. Bibbo, J. Pattison, and M. Bhat, " The effect on dose to computed tomography phantoms of varying the theoretical x-ray spectrum: A comparison of four diagnostic x-ray spectrum calculating codes.," Med. Phys. 0094-2405 10.1118/1.598281 25, 1021-1027 (1998).
18. R. L. Dixon, M. T. Munley, and E. Bayram, " An improved analytical model for CT dose simulation with a new look at the theory of CT dose.," Med. Phys. 0094-2405 10.1118/1.2122507 32, 3712-3728 (2005).
19. P. C. Shrimpton and S. Edyvean, " CT scanner dosimetry.," Br. J. Radiol. 71, 1-3 (1998). 0007-1285
20. R. Kramer, J. W. Vieira, H. J. Khoury, and F. de Andrade Lima, " MAX meets ADAM: A dosimetric comparison between a voxel-based and a mathematical model for external exposure to photons.," Phys. Med. Biol. 0031-9155 10.1088/0031-9155/49/6/002 49, 887-910 (2004).
21. R. L. Dixon, " A new look at CT dose measurement: Beyond CTDI.," Med. Phys. 0094-2405 10.1118/1.1576952 30, 1272-1280 (2003).
22. P. C. Shrimpton, M. C. Hillier, M. A. Lewis, and M. Dunn, Doses from Computed Tomography (CT) Examinations in the UK-2003 Review, National Radiological Protection Board-W67, Oxon, UK, 2005 (unpublished).
23. G. Giacco, V. Cannata, C. Furetta, F. Santopietro, and G. Fariello, " On the use of pediatric phantoms in the dose evaluation during computed tomography CT. thorax examinations.," Med. Phys. 0094-2405 10.1118/1.1344205 28, 199-204 (2001).
24. K. N. Wise, The ratios of effective dose to entrance skin dose and to air kerma for some medical sources, Australian Radiation Laboratory, TR124 Yallambie, Australia, 1998 (unpublished).
25. A. Khursheed, M. C. Hillier, P. C. Shrimpton, and B. F. Wall, " Influence of patient age on normalized effective doses calculated for CT examinations.," Br. J. Radiol. 75, 819-830 (2002). 0007-1285
26. International Organization for Standardization, ISO Guide to the Expression of Uncertainty in Measurement (International Organisation for Standardization, Geneva, 1993, corrected and reprinted, 1995).
27. K. Gregory, G. Bibbo, and J. E. Pattison, " A standard approach to measurement uncertainties for scientists and engineers in medicine.," Australas. Phys. Eng. Sci. Med. 28, 131-139 (2005) 0158-9938; http://www.scribd.com/doc/99586/GUM-guide.
28. K. J. Gregory, J. E. Pattison, and G. Bibbo, " Uncertainties of exposure-related quantities in mammographic x-ray unit quality control.," Med. Phys. 0094-2405 10.1118/1.2173050 33, 687-98 (2006).
29. G. Brix, U. Lechel, R. Veit, R. Truckenbrodt, G. Stamm, E. M. Coppenrath, J. Griebel, and H. D. Nagel, " Assessment of a theoretical formalism for dose estimation in CT: An anthropomorphic phantom study.," Eur. Radiol. 14, 1275-1284 (2004). 0938-7994
30. A. M. Groves, K. E. Owen, H. M. Courtney, S. J. Yates, K. E. Goldstone, G. M. Blake, and A. K. Dixon, " 16-detector multislice CT: Dosimetry estimation by TLD measurement compared with Monte Carlo simulation.," Br. J. Radiol. 0007-1285 10.1259/bjr/48307881 77, 662-665 (2004).
31. International Atomic Energy Agency, Absorbed Dose Determination in External Beam Radiotherapy: An International Code of Practice for Dosimetry based on Standards of Absorbed Dose to Water, TRS-398 (IAEA, Vienna, 2000).
32. M. Caon, G. Bibbo, and J. Pattison, " An EGS4-ready tomographic computational model of a 14-year-old female torso for calculating organ doses from CT examinations.," Phys. Med. Biol. 0031-9155 10.1088/0031-9155/44/9/ 309 44, 2213-25 (1999).
33. W. A. Kalender, Computed Tomography: Fundamentals, System Technology, Image Quality, Applications, 2nd ed. (Publicis Corporate Publishing, Erlangen, 2005).
34. G. Jarry, J. J. DeMarco, U. Beifuss, C. H. Cagnon, and M. F. McNitt-Gray, " A Monte Carlo-based method to estimate radiation dose from spiral CT: From phantom testing to patient-specific models.," Phys. Med. Biol. 0031-9155 10.1088/0031-9155/48/16/306 48, 2645-63 (2003).
35. M. R. Ay and H. Zaidi, " Development and validation of MCNP4C-based Monte Carlo simulator for fan- and cone-beam x-ray CT.," Phys. Med. Biol. 0031-9155 10.1088/0031-9155/50/20/009 50, 4863-85 (2005).
36. http://www.impactscan.org/ctdosimetry.htm.
37. Scanditronix Wellhöfer, Germany, www.scanditronix-wellhofer.com.