Geometric distortion and shimming considerations in a rotating MR-linac design due to the influence of low-level external magnetic fields

Medical Physics

Volumn 39, Issue 5, 2012, Pages 2659-2668

  Wachowicz, K ^a   Tadic, T ^a   Fallone, B G ^a  

^a UNIVERSITY OF ALBERTA   (Canada)

Author keywords

distortion; external magnetic field; linear accelerator; rotating MRI

Indexed keywords

DISTORTION (WAVES); FREQUENCY ALLOCATION; HARMONIC ANALYSIS; LINEAR ACCELERATORS; MAGNETS; PATIENT TREATMENT; SHIMS;

EXTERNAL MAGNETIC FIELD; FERROMAGNETIC STRUCTURES; FIELD INHOMOGENEITY; FINITE ELEMENT SIMULATIONS; GEOMETRIC DISTORTION; RESIDUAL DISTORTIONS; SPHERICAL HARMONICS; STRAY MAGNETIC FIELDS;

MAGNETIC FIELDS;

EID: 84861635904     PISSN: 00942405     EISSN: None     Source Type: Journal    
DOI: 10.1118/1.3702591     Document Type: Article

References (12)

1. M. J. Lang, A. D. Greer, and G. R. Sutherland, Intra-operative MRI at 3.0 Tesla: A moveable magnet., Acta. Neurochir. Suppl. 109, 151-156 (2011). 10.1007/978-3-211-99651-5
2. B. G. Fallone, B. Murray, S. Rathee, T. Stanescu, S. Steciw, S. Vidakovic, E. Blosser, and D. Tymofichuk, First MR images obtained during megavoltage photon irradiation from a prototype integrated linac-MR system., Med. Phys. 36, 2084-2088 (2009). 10.1118/1.3125662
3. C. Kirkby, B. Murray, S. Rathee, and B. G. Fallone, Lung dosimetry in a linac-MRI radiotherapy unit with a longitudinal magnetic field., Med. Phys. 37, 4722-4732 (2010). 10.1118/1.3475942
4. D. W. McRobbie, E. A. Moore, M. J. Graves, and M. R. Prince, MRI From Picture to Proton (Cambridge University Press, New York, 2003), p. 186.
5. N. B. S. Gloria, M. C. L. Areiza, I. V. J. Miranda, and J. M. A. Rebello, Development of a magnetic sensor for detection and sizing of internal pipeline corrosion defects., NDTE Int. 42 (8), 669-677 (2009). 10.1016/j.ndteint.2009.06. 009
6. D. M. Kohler, Production and properties of grain-oriented commercially pure iron., J. Appl. Phys. 38 (3), 1176-1178 (1967). 10.1063/1.1709530
7. R. Gruetter and C. Boesch, Fast, noneterative shimming of spatially localized signals. In vivo analysis of the magnetic field along axes., J. Magn. Reson. 96, 323-334 (1992). 10.1016/0022-2364(92)90085-L
8. R. A. de Graaf, In Vivo NMR Spectroscopy, Principles and Techniques, 2nd ed. (John Wiley Sons, Chichester, 2007), p. 489.
9. M. A. Blanco, M. Florez, and M. Bermejo, Evaluation of the rotation matrices in the basis of real spherical harmonics., J. Mol. Struc.-Theochem. 419, 19-27 (1997). 10.1016/S0166-1280(97)00185-1 (Pubitemid 127437818)
10. J. D. Jackson, Classical Electrodynamics, 3rd ed. (John Wiley Sons, New York, 1998), p. 109.
11. M. A. Brideson, L. K. Forbes, and S. Crozier, Winding patterns for biplanar MRI shim coils with rectangular and circular target-field regions., Meas. Sci. Technol. 15, 1019-1025 (2004). 10.1088/0957-0233/15/5/035 (Pubitemid 38687957)
12. M. A. Bernstein, K. F. King, and X. J. Zhou, Handbook of MRI Pulse Sequences (Academic, New York, 2004), p. 716.