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Theoretical and experimental neutron...

Perez-Andujar, Angelica A.

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Theoretical and experimental neutron dose determination for proton therapy delivery techniques.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Theoretical and experimental neutron dose determination for proton therapy delivery techniques./
作者:	Perez-Andujar, Angelica A.
面頁冊數:	118 p.
附註:	Source: Dissertation Abstracts International, Volume: 70-11, Section: B, page: 6966.
Contained By:	Dissertation Abstracts International70-11B.
標題:	Nuclear physics and radiation. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3384447
ISBN:	9781109476996

Theoretical and experimental neutron dose determination for proton therapy delivery techniques.
Perez-Andujar, Angelica A.

Theoretical and experimental neutron dose determination for proton therapy delivery techniques. - 118 p.

Source: Dissertation Abstracts International, Volume: 70-11, Section: B, page: 6966.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2009.

In recent years the use of high energy protons in radiotherapy has increased dramatically. The clinical advantages are apparent, but there is some controversy regarding the secondary neutrons produced during treatment. This work presents a study of neutron production in proton therapy. We examined the neutron production due to materials typically present in a treatment nozzle. In addition, the neutron field characteristics, fluence, energy spectra and absorbed dose were investigated for a contemporary passive system. Microdosimetric measurements were performed to quantify the neutron field characteristics for a passive beam delivery system.

ISBN: 9781109476996Subjects--Topical Terms:

3173793
Nuclear physics and radiation.

Theoretical and experimental neutron dose determination for proton therapy delivery techniques.
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245 1 0 $a Theoretical and experimental neutron dose determination for proton therapy delivery techniques.
300 $a 118 p.
500 $a Source: Dissertation Abstracts International, Volume: 70-11, Section: B, page: 6966.
500 $a Adviser: Paul M. DeLuca, Jr.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2009.
520 $a In recent years the use of high energy protons in radiotherapy has increased dramatically. The clinical advantages are apparent, but there is some controversy regarding the secondary neutrons produced during treatment. This work presents a study of neutron production in proton therapy. We examined the neutron production due to materials typically present in a treatment nozzle. In addition, the neutron field characteristics, fluence, energy spectra and absorbed dose were investigated for a contemporary passive system. Microdosimetric measurements were performed to quantify the neutron field characteristics for a passive beam delivery system.
520 $a The neutron absorbed dose is dependent on the type of material with which the primary proton beam interacts. Lower atomic number materials produce fewer neutrons, although they are forward directed and have energies close to the primary proton beam. Higher atomic number materials produce a larger number of evaporation neutrons emitted nearly isotropically, although there is some forward directed production. This behavior was confirmed by microdosimetric measurements for thick targets. In addition, from our studies and measurements, we determined that the treatment snout is in fact the maximum neutron dose contributor to the dose that a patient will receive during proton therapy. Other beam shaping devices, such as the range modulation wheel (RMW), produce a greater neutron fluence within the nozzle but do not dominate the neutron dose receive by the patient.
590 $a School code: 0262.
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710 2 $a The University of Wisconsin - Madison. $3 626640
773 0 $t Dissertation Abstracts International $g 70-11B.
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791 $a Ph.D.
792 $a 2009
793 $a English
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