On the existence of low-energy photons (<150 keV) in the unflattened x-ray beam from an ordinary radiotherapeutic target in a medical linear accelerator

Physics in Medicine and Biology

Volumn 50, Issue 23, 2005, Pages 5629-5639

  Tsechanski, A ^a,b   Krutman, Y ^c   Faermann, S ^d  

^a BEN GURION UNIVERSITY OF THE NEGEV   (Israel)

^b Clalit Biomedical Engineering Ltd   (Israel)

^c RABIN MEDICAL CENTER   (Israel)

^d BEN GURION UNIVERSITY OF THE NEGEV   (Israel)

Author keywords

[No Author keywords available]

Indexed keywords

DENSITY (OPTICAL); LEAD; LINEAR ACCELERATORS; RADIOTHERAPY; X RAYS;

FLATTENING FILTERS; LOW-ENERGY PHOTONS;

PHOTONS;

COPPER; LEAD;

ARTICLE; ELECTRON BEAM; FILTER; IMAGE QUALITY; LINEAR ACCELERATOR; LOW ENERGY RADIATION; OPTICAL DENSITY; PHOTON; PRIORITY JOURNAL; RADIATION ABSORPTION; X RAY; X RAY FILM;

COPPER; ELECTRONS; FILM DOSIMETRY; LEAD; PARTICLE ACCELERATORS; PHOTONS; RADIOTHERAPY; RADIOTHERAPY DOSAGE; SCATTERING, RADIATION; X-RAYS;

EID: 28644442845     PISSN: 00319155     EISSN: 13616560     Source Type: Journal    
DOI: 10.1088/0031-9155/50/23/015     Document Type: Article

References (18)

1. Amols H I, Reinstein L E and Langueux B 1986 A quantitative assessment of portal film contrast as a function of beam energy Med. Phys. 13 711-6
2. Biggs P J, Goitein M and Russell M D 1985 A diagnostic x-ray field verification device for a 10 MeV linear accelerator Int. J. Radiat. Oncol. Biol. Phys. 11 635-43
3. Flampouri S, Evans P M, Verhaegen F, Nahum A E, Spezi E and Partridge M 2002 Optimization of accelerator target and detector for portal imaging using Monte Carlo simulation and experiment Phys. Med. Biol. 47 3331-49
4. Galbraith D M 1989 Low-energy imaging with high energy bremsstrahlung beams Med. Phys. 16 734-46
5. Haus A G, Dickerson H E, Huff K E, Monte S, Schlagger B A, Atanas M and Matlonbieh A 1997 Evaluation of a cassette-screen-film combination for radiation therapy portal localization imaging with improved contrast Med. Phys. 24 1605-8
6. Herman M G, Balter J M, Jaffray D A, McGee K P, Munro P, Shalev S, Van Kerk M and Wong J W 2001 Clinical use of electronic portal imaging: report of AAPM Radiation Therapy Committee Task Group 58 Med. Phys. 28 712-37
7. Jaffray D A, Chawla K, Yu C and Wong J W 1995 Dual beam imaging for on-line verification of radiotherapy field placement Int. J. Radiat. Oncol. Biol. Phys. 33 1273-80
8. Jaffray D A, Drake D G, Moreau M, Martinez A A and Wong J W 1999 A radiographic and tomographic imaging system integrated into a medical linear accelerator for localization of bone and soft-tissue targets Int. J. Radiat. Oncol. Biol. Phys. 45 773-89
9. Krutman Y, Faermann S and Tsechanski A 2002 Use of mammographic film-screen-cassette combination for portal localization imaging with a 4 MV x-ray unflattened beam Phys. Med. 2 55-63
10. Langmack K A 2001 Portal imaging Br. J. Radiol. 74 789-804
11. Mah C, Galbraith D M and Rawlinson J A 1993 Low-energy imaging with high energy bremsstrahlung beams: analysis and scatter reduction Med. Phys. 20 653-65
12. Nunan C S 1995 Radiotherapy apparatus equipped with low dose localizing and portal imaging x-ray source US Patent 5,471,516
13. Ostapiak O Z, O'Brien P F and Faddegon B A 1998 Megavoltage imaging with low Z target: implementation and characterization of an investigational system Med. Phys. 25 1910-8
14. Purdy J A, Gerber R L, Granda C O and Parrino P A 1981 Improved localization films for high energy linear accelerator Med. Phys. 8 57
15. Sephton R and Hagekyriarkon J 1995 A diagnostic-quality electronic portal imaging system Radiother. Oncol. 35 240-7
16. Tsechanski A, Faermann S and Krutman Y 1997 Low-energy unflattened beam for portal imaging Phys. Med. 13 162-5
17. Tsechanski A, Bielayew A, Faermann S and Krutman Y 1998 A thin target approach for portal imaging in medical accelerators Phys. Med. Biol. 43 2221-36
18. Varian 1982 Catalog RAD 1933A Varian Report 10/82 Varian Associates