Control of photon beam dose profiles by localized transverse magnetic fields

被引:23
|
作者
Reiffel, L
Li, A
Chu, J
Wheatley, RW
Naqvi, S
Pillsbury, R
Saxena, A
机构
[1] Exelar Corp, Chicago, IL 60614 USA
[2] Rush Presbyterian St Lukes Med Ctr, Dept Med Phys, Chicago, IL 60612 USA
[3] Rush Presbyterian St Lukes Med Ctr, Dept Radiat Oncol, Chicago, IL 60612 USA
[4] Superconduct Associates Inc, Niskayuna, NY 12309 USA
[5] Sherbrooke Consulting Inc, Washington, DC 20006 USA
来源
PHYSICS IN MEDICINE AND BIOLOGY | 2000年 / 45卷 / 12期
关键词
D O I
10.1088/0031-9155/45/12/401
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Unlike electron beams, scant attention has been paid in the literature to possible magnetic field effects on therapeutic photon beams. Generally, dose profiles are considered to be fully determined by beam shape, photon spectrum and the substances in the beam path. Here we show that small superconducting magnets can exercise potentially useful control over photon dose profiles. The magnet produces a locally strong transverse field with large gradients and is applied to the tissue surface below which the photon beam is passing. For one practical magnet design, our simulations, which use the EGS-4 Monte Carlo code modified to include magnetic field effects, show significant intensification and shielding effects. In water phantoms, the effects extend to 3-4 cm or more beyond the warm face of the cryostat and greater distances are achieved in phantoms simulating lung (density similar to0.3). Advances in applying the concept and in superconducting materials and magnet design hold promise for extending these ranges.
引用
收藏
页码:N177 / N182
页数:6
相关论文
共 50 条
  • [21] NUMERICAL INVESTIGATION OF A PLASMA BEAM ENTERING TRANSVERSE MAGNETIC-FIELDS
    KOGA, J
    GEARY, JL
    FUJINAMI, T
    NEWBERGER, BS
    TAJIMA, T
    ROSTOKER, N
    JOURNAL OF PLASMA PHYSICS, 1989, 42 : 91 - 110
  • [22] Magnetic Control of the Pair Creation in Spatially Localized Supercritical Fields
    Su, Q.
    Su, W.
    Lv, Q. Z.
    Jiang, M.
    Lu, X.
    Sheng, Z. M.
    Grobe, R.
    PHYSICAL REVIEW LETTERS, 2012, 109 (25)
  • [23] Transverse electric and transverse magnetic pulsed-beam decomposition of time-dependent aperture fields
    Melamed, Timor
    Abuhasira, Dor
    Dayan, David
    JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 2012, 29 (06) : 1115 - 1123
  • [24] Effect of transverse magnetic fields on dose distribution and RBE of photon beams: comparing PENELOPE and EGS4 Monte Carlo codes
    Nettelbeck, H.
    Takacs, G. J.
    Rosenfeld, A. B.
    PHYSICS IN MEDICINE AND BIOLOGY, 2008, 53 (18): : 5123 - 5137
  • [25] Coupling effects of ferromagnetic beam-plates excited by transverse magnetic fields
    Xue, CX
    Shu, XF
    ISTM/2005: 6th International Symposium on Test and Measurement, Vols 1-9, Conference Proceedings, 2005, : 2894 - 2897
  • [26] SUPPRESSION OF CROSSED-FIELD BEAM NOISE BY LATERAL AND TRANSVERSE MAGNETIC FIELDS
    SISODIA, ML
    GANDHI, OP
    WADHWA, RP
    INTERNATIONAL JOURNAL OF ELECTRONICS, 1967, 22 (06) : 575 - &
  • [27] Transient vibration analysis of a pinned beam with transverse magnetic fields and thermal loads
    Wu, GY
    JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME, 2005, 127 (03): : 247 - 253
  • [28] Constancy tests of Dose profiles for small non-homogeneous Beam fields
    Garbe, S.
    Benabbou, M.
    STRAHLENTHERAPIE UND ONKOLOGIE, 2011, 187 : 104 - 104
  • [29] Magnetic Properties of 4f Localized Ferromagnet CeAgSb2 under Transverse Magnetic Fields
    Kawasaki, Ikuto
    Ogata, Shingo
    Kawai, Shogo
    Fukuyama, Yuji
    Yamaguchi, Akira
    Sumiyama, Akihiko
    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2018, 87 (01)
  • [30] Observation of orthogonally polarized transverse electric and transverse magnetic oscillation modes in a microcavity excited by localized two-photon absorption
    Gan, DM
    Gan, XS
    Gu, M
    APPLIED PHYSICS LETTERS, 2002, 81 (27) : 5132 - 5134