Compensating for the impact of non-stationary spherical air cavities on IMRT dose delivery in transverse magnetic fields

Physics in Medicine and Biology

Volumn 60, Issue 2, 2015, Pages 755-768

  Bol, G H ^a   Lagendijk, J J W ^a   Raaymakers, B W ^a  

^a UNIVERSITY MEDICAL CENTER UTRECHT   (Netherlands)

Author keywords

electron return effect; IMRT; magnetic field; MRI

Indexed keywords

INTELLIGENT SYSTEMS; MAGNETIC RESONANCE IMAGING; MONTE CARLO METHODS; PHANTOMS; SPHERES;

BASELINE SHIFTS; BEAM CONFIGURATION; ELECTRON RETURN EFFECTS; IMRT; INTENSITY-MODULATED RADIOTHERAPY; OPTIMIZED PLANS; ORGANS AT RISKS; TRANSVERSE MAGNETIC FIELD;

MAGNETIC FIELDS;

AIR; COMPUTER ASSISTED RADIOTHERAPY; DEVICES; ELECTROMAGNETIC FIELD; ELECTRON; HUMAN; IMAGE QUALITY; INTENSITY MODULATED RADIATION THERAPY; MAGNETIC AND ELECTROMAGNETIC EQUIPMENT; MEGAVOLTAGE RADIOTHERAPY; MONTE CARLO METHOD; PROCEDURES;

AIR; ELECTROMAGNETIC FIELDS; ELECTRONS; HUMANS; MONTE CARLO METHOD; PARTICLE ACCELERATORS; PHANTOMS, IMAGING; RADIOTHERAPY PLANNING, COMPUTER-ASSISTED; RADIOTHERAPY, HIGH-ENERGY; RADIOTHERAPY, INTENSITY-MODULATED;

EID: 84920767660     PISSN: 00319155     EISSN: 13616560     Source Type: Journal    
DOI: 10.1088/0031-9155/60/2/755     Document Type: Article

References (18)

1. Bol G H, Hissoiny S, Lagendijk J J W and Raaymakers B W 2012 Fast online Monte Carlo-based IMRT planning for the MRI linear accelerator Phys. Med. Biol. 57 1375-85
2. Crijns S P M, Kok J G M, Lagendijk J J W and Raaymakers B W 2011 Towards MRI-guided linear accelerator control: gating on an MRI accelerator Phys. Med. Biol. 56 4815-25
3. Crijns S P M, Raaymakers B W and Lagendijk J J W 2012 Proof of concept of MRI-guided tracked radiation delivery: tracking one-dimensional motion Phys. Med. Biol. 57 7863-72
4. Fallone B G, Murray B, Rathee S, Stanescu T, Steciw S, Vidakovic S, Blosser E and Tymofichuk D 2009 First MR images obtained during megavoltage photon irradiation from a prototype integrated linac-MR system Med. Phys. 36 2084-8
5. Goldman S P, Chen J Z and Battista J J 2005 Feasibility of a fast inverse dose optimization algorithm for IMRT via matrix inversion without negative beamlet intensities Med. Phys. 32 3007-16
6. Goldman S P, Thurnbull D, Johnson C, Chen J Z and Battista J J 2009 Real-time fast inverse dose optimization for image guided adaptive radiation therapy-enhancements to fast inverse dose optimization (FIDO) J. Appl. Phys. 105 102008
7. Hissoiny S, Ozell B, Bouchard H and Despres P 2011a GPUMCD: a new GPU-oriented Monte Carlo dose calculation platform Med. Phys. 38 754-64
8. Hissoiny S, Raaijmakers A J, Ozell B, Despres P and Raaymakers B W 2011b Fast dose calculation in magnetic fields with GPUMCD Phys. Med. Biol. 56 5119-29
9. Kirkby C, Stanescu T, Rathee S, Carlone M, Murray B and G Fallone B 2008 Patient dosimetry for hybrid MRI-radiotherapy systems Med. Phys. 35 1019-27
10. Oborn B M, Metcalfe P E, Butson M J and Rosenfeld A B 2009 High resolution entry and exit Monte Carlo dose calculations from a linear accelerator 6 MV beam under the influence of transverse magnetic fields Med. Phys. 36 3549-59
11. Oborn B M, Metcalfe P E, Butson M J and Rosenfeld A B 2010 Monte Carlo characterization of skin doses in 6 MV transverse field MRI-linac systems: effect of field size, surface orientation, magnetic field strength, and exit bolus Med. Phys. 37 5208-17
12. Pfaffenberger A 2013 Dose calculation algorithms for radiation therapy with an MRI-integrated radiation device PhD Thesis German Cancer Research Center (DKFZ)
13. Raaijmakers A J E, Hårdemark B, Raaymakers B W, Raaijmakers C P J and Lagendijk J J W 2007a Dose optimization for the MRI-accelerator: IMRT in the presence of a magnetic field Phys. Med. Biol. 52 7045-54
14. Raaijmakers A J E, Raaymakers B W and Lagendijk J J W 2005 Integrating a MRI scanner with a 6 MV radiotherapy accelerator: dose increase at tissue-air interfaces in a lateral magnetic field due to returning electrons Phys. Med. Biol. 50 1363-76
15. Raaijmakers A J E, Raaymakers B W, Van der Meer S and Lagendijk J J W 2007b Integrating a MRI scanner with a 6 MV radiotherapy accelerator: impact of the surface orientation on the entrance and exit dose due to the transverse magnetic field Phys. Med. Biol. 52 929-39
16. Raaymakers B W et al 2009 Integrating a 1.5 T MRI scanner with a 6 MV accelerator: proof of concept Phys. Med. Biol. 54 N229-37
17. Raaymakers B W, Raaijmakers A J E, Kotte A N T J, Jette D and Lagendijk J J W 2004 Integrating a MRI scanner with a 6 MV radiotherapy accelerator: dose deposition in a transverse magnetic field Phys. Med. Biol. 49 4109-18
18. Yang Y M and Bednarz B 2013 Consistency evaluation between EGSnrc and Geant4 charged particle transport in an equilibrium magnetic field Phys. Med. Biol. 58 N47-58