MO-F-213AB-01: Improving Dose Uniformity in Patch-Field Proton Therapy Using Beam Current Modulation

2012 ◽  
Vol 39 (6Part21) ◽  
pp. 3871-3871
Author(s):  
P Hill ◽  
E Klein ◽  
C Bloch
Keyword(s):  
Proton Therapy ◽  
Beam Current ◽  
Current Modulation ◽  
Dose Uniformity

Simulation study on beam current modulation of C-band wide-gap triaxial klystron

2010 ◽  
Vol 22 (3) ◽  
pp. 600-604
Author(s):  
白现臣 Bai Xianchen ◽  
张建德 Zhang Jiande ◽  
杨建华 Yang Jianhua ◽  
张泽海 Zhang Zehai
Keyword(s):  
Simulation Study ◽  
Beam Current ◽  
Current Modulation ◽  
Wide Gap

scholarly journals Novel Gd3+-doped silica-based optical fiber material for dosimetry in proton therapy

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
C. Hoehr ◽  
A. Morana ◽  
O. Duhamel ◽  
B. Capoen ◽  
M. Trinczek ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Proton Therapy ◽  
Bragg Peak ◽  
Light Emission ◽  
Sol Gel ◽  
Fiber Material ◽  
Beam Current ◽  
Strong Luminescence ◽  
The University

Abstract Optical fibers hold promise for accurate dosimetry in small field proton therapy due to their superior spatial resolution and the lack of significant Cerenkov contamination in proton beams. One known drawback for most scintillation detectors is signal quenching in areas of high linear energy transfer, as is the case in the Bragg peak region of a proton beam. In this study, we investigated the potential of innovative optical fiber bulk materials using the sol-gel technique for dosimetry in proton therapy. This type of glass is made of amorphous silica (SiO$${}_{2}$$ 2 ) and is doped with Gd$${}^{3+}$$ 3 + ions and possesses very interesting light emission properties with a luminescence band around 314 nm when exposed to protons. The fibers were manufactured at the University of Lille and tested at the TRIUMF Proton Therapy facility with 8.2–62.9 MeV protons and 2–6 nA of extracted beam current. Dose-rate dependence and quenching were measured and compared to other silica-based fibers also made by sol-gel techniques and doped with Ce$${}^{3+}$$ 3 + and Cu$${}^{+}$$ + . The three fibers present strong luminescence in the UV (Gd) or visible (Cu,Ce) under irradiation, with the emission intensities related directly to the proton flux. In addition, the 0.5 mm diameter Gd$${}^{3+}$$ 3 + -doped fiber shows superior resolution of the Bragg peak, indicating significantly reduced quenching in comparison to the Ce$${}^{3+}$$ 3 + and Cu$${}^{+}$$ + fibers with a Birks’ constant, k$${}_{B}$$ B , of (0.0162 $$\pm $$ ± 0.0003) cm/MeV in comparison to (0.0333 $$\pm $$ ± 0.0006) cm/MeV and (0.0352 $$\pm $$ ± 0.0003) cm/MeV, respectively. To our knowledge, this is the first report of such an interesting k$${}_{B}$$ B for a silica-based optical fiber material, showing clearly that this fiber presents lower quenching than common plastic scintillators. This result demonstrates the high potential of this inorganic fiber material for proton therapy dosimetry.

The basic study of a bi-material range compensator for improving dose uniformity for proton therapy

2008 ◽  
Vol 53 (19) ◽  
pp. 5555-5569 ◽  
Author(s):  
Yoshihisa Takada ◽  
Takeshi Himukai ◽  
Kenji Takizawa ◽  
Yohsuke Terashita ◽  
Satoshi Kamimura ◽  
...  
Keyword(s):  
Proton Therapy ◽  
Basic Study ◽  
Dose Uniformity

Measurement and Behavior Analysis of Beam Current Modulation in a Virtual Cathode Oscillator

2021 ◽  
pp. 1-6
Author(s):  
Kazuki Nagao ◽  
Hiroyoshi Kuno ◽  
Hayato Suzuki ◽  
Taichi Sugai ◽  
Weihua Jiang
Keyword(s):  
Behavior Analysis ◽  
Virtual Cathode ◽  
Beam Current ◽  
Current Modulation ◽  
And Behavior

Design and test of a compact beam current monitor based on a passive RF cavity for a proton therapy linear accelerator

2021 ◽  
Vol 92 (11) ◽  
pp. 113304
Author(s):  
F. Cardelli ◽  
A. Ampollini ◽  
G. Bazzano ◽  
P. Nenzi ◽  
L. Piersanti ◽  
...  
Keyword(s):  
Proton Therapy ◽  
Linear Accelerator ◽  
Beam Current ◽  
Rf Cavity

scholarly journals Dynamic beam current control for improved dose accuracy in PBS proton therapy

2019 ◽  
Vol 64 (17) ◽  
pp. 175003
Author(s):  
C Bula ◽  
M F Belosi ◽  
M Eichin ◽  
J Hrbacek ◽  
D Meer
Keyword(s):  
Proton Therapy ◽  
Beam Current ◽  
Current Control ◽  
Dose Accuracy
Sign in / Sign up

Export Citation Format

Share Document