An effective correction algorithm for off-axis portal dosimetry errors

Medical Physics

Volumn 36, Issue 9, 2009, Pages 4089-4094

  Bailey, Daniel W ^a   Kumaraswamy, Lalith ^b   Podgorsak, Matthew B ^b  

^a UNIVERSITY AT BUFFALO   (United States)

^b ROSWELL PARK CANCER INSTITUTE   (United States)

Author keywords

EPID; IMRT QA; Off axis dose; Portal dosimetry

Indexed keywords

CORRECTION ALGORITHMS; EPID; IMRT QA; OFF-AXIS; OUTPUT FACTORS; PORTAL DOSIMETRIES; PRE-TREATMENT; TREATMENT PLANNING SYSTEMS;

DOSIMETRY;

ACCURACY; ALGORITHM; ARTICLE; ARTIFACT REDUCTION; CALCULATION; COLLIMATOR; CONTROLLED STUDY; DOSIMETRY; INTENSITY MODULATED RADIATION THERAPY; MEASUREMENT ERROR; PREDICTION; PRIORITY JOURNAL;

ALGORITHMS; BRAIN; BRAIN NEOPLASMS; BREAST; BREAST NEOPLASMS; CALIBRATION; FEMALE; HEAD AND NECK NEOPLASMS; HUMANS; RADIATION DOSAGE; RADIOMETRY; RADIOTHERAPY DOSAGE; RADIOTHERAPY PLANNING, COMPUTER-ASSISTED; RADIOTHERAPY, INTENSITY-MODULATED;

EID: 69549135345     PISSN: 00942405     EISSN: None     Source Type: Journal    
DOI: 10.1118/1.3187785     Document Type: Article

References (13)

1. R. Howell, I. Smith, and C. Jarrio, " Establishing action levels for EPID-based QA for IMRT.," J. Appl. Clin. Med. Phys. 9 (3), 16-25 (2008). 10.1120/jacmp.v9i3.2721
2. J. Liu, Z. Wang, L. Kumaraswamy, D. Nazareth, M. Podgorsak, and H. Malhotra, " Comparison of the efficacy of MapCHECK and portal dosimetry in the pretreatment QA of IMRT treatment plans (abstract).," Med. Phys. 35, 2764-2765 (2008). 10.1118/1.2961921
3. K. Pasma, M. Dirkx, M. Kroonwijk, A. Visser, and B. Heijmen, " Dosimetric verification of intensity modulated beams produced with dynamic multileaf collimation using an electronic portal imaging device.," Med. Phys. 26, 2373-2378 (1999). 10.1118/1.598752
4. M. van Zijtveld, M. Dirkx, H. de Boer, and B. Heijmen, " Dosimetric pre-treatment verification of IMRT using an EPID: Clinical experience.," Radiother. Oncol. 81 (2), 168-175 (2006). 10.1016/j.radonc.2006.09.008 (Pubitemid 44708372)
5. P. Vial, P. Greer, P. Hunt, L. Oliver, and C. Baldock, " The impact of MLC transmitted radiation on EPID dosimetry for dynamic MLC beams.," Med. Phys. 35, 1267-1277 (2008). 10.1118/1.2885368
6. P. Greer, " Off-axis dose response characteristics of an amorphous silicon electronic portal imaging device.," Med. Phys. 34, 3815-3824 (2007). 10.1118/1.2779944 (Pubitemid 47482883)
7. P. Greer, " Correction of pixel sensitivity variation and off-axis response for amorphous silicon EPID dosimetry.," Med. Phys. 32, 3558-3568 (2005). 10.1118/1.2128498
8. L. Parent, J. Seco, P. M. Evans, A. Fielding, and D. R. Dance, " Monte Carlo modeling of a-si epid response: The effect of spectral variations with field size and position.," Med. Phys. 33 (12), 4527-4540 (2006). 10.1118/1.2369465 (Pubitemid 44868089)
9. B. Warkentin, S. Steciw, S. Rathee, and B. Fallone, " Dosimetric IMRT verification with a flat-panel EPID.," Med. Phys. 30, 3143-3155 (2003). 10.1118/1.1625440 (Pubitemid 37553755)
10. C. Talamonti, M. Casati, and M. Bucciolini, " Pretreatment verification of IMRT absolute dose distributions using a commercial a-Si EPID.," Med. Phys. 33, 4367-4378 (2006). 10.1118/1.2357834 (Pubitemid 44673126)
11. A. Van Esch, T. Depuydt, and D. Huyskens, " The use of an a-Si based EPID for routine absolute dosimetric pre-treatment verification of dynamic IMRT fields.," Radiother. Oncol. 71 (2), 223-234 (2004). 10.1016/j.radonc.2004. 02.018 (Pubitemid 38521192)
12. J. V. Siebers, J. O. Kim, L. Ko, P. J. Keall, and R. Mohan, " Monte Carlo computation of dosimetric amorphous silicon electronic portal images.," Med. Phys. 31 (7), 2135-2146 (2004). 10.1118/1.1764392 (Pubitemid 38924836)
13. L. Ko, J. Kim, and J. Siebers, " Investigation of the optimal backscatter for an a-Si electronic portal imaging device.," Phys. Med. Biol. 49 (9), 1723-1738 (2004). 10.1088/0031-9155/49/9/010 (Pubitemid 38678711)