BEAM SHAPING ASSEMBLY FOR NEUTRON CAPTURE THERAPY

A beam shaping assembly for neutron capture therapy includes a beam inlet, a target having nuclear reaction with an incident proton beam from the beam inlet to produce neutrons forming a neutron beam defining a main axis, wherein the target is received into a moderator, a reflector surrounding and s...

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Bibliographische Detailangaben
Hauptverfasser:	LEE, Peiyi, LIU, Yuanhao
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONVERSION OF CHEMICAL ELEMENTS ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY NUCLEAR ENGINEERING NUCLEAR PHYSICS PHYSICS PLASMA TECHNIQUE PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OFNEUTRONS PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMICBEAMS RADIOACTIVE SOURCES
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Beschreibung
Zusammenfassung:	A beam shaping assembly for neutron capture therapy includes a beam inlet, a target having nuclear reaction with an incident proton beam from the beam inlet to produce neutrons forming a neutron beam defining a main axis, wherein the target is received into a moderator, a reflector surrounding and supporting the moderator, a thermal neutron absorber adjoining to the moderator, a radiation shield arranged inside the beam shaping assembly and a beam outlet. The neutrons are moderated to epithermal neutron energies. The reflector leads the neutrons deviated from the main axis back, and a gap channel is arranged between the moderator and the reflector. The thermal neutron absorber is used for absorbing thermal neutrons so as to avoid overdosing in superficial normal tissue during therapy. The radiation shield is used for shielding leaking neutrons and photons so as to reduce dose of the normal tissue not exposed to irradiation.