Development and Dosimetric Characterization of a Tissue Substitute (Bolus) For Use in Linear Accelerator Electron Radiotherapy

2003 ◽  
Author(s):  
Jorge Estrada Trujillo
Keyword(s):  
Linear Accelerator ◽  
Electron Radiotherapy

scholarly journals Beam characterization of 10-MV photon beam from medical linear accelerator without flattening filter

2017 ◽  
Vol 42 (2) ◽  
pp. 65
Author(s):  
Tomohiro Shimozato ◽  
Yuichi Aoyama ◽  
Takuma Matsunaga ◽  
Katsuyoshi Tabushi
Keyword(s):  
Linear Accelerator ◽  
Photon Beam ◽  
Medical Linear Accelerator ◽  
Beam Characterization ◽  
Flattening Filter

Dosimetric changes induced by positional uncertainty of cutout in electron radiotherapy

2008 ◽  
Vol 7 (3) ◽  
pp. 133-140 ◽  
Author(s):  
James C.L. Chow ◽  
Grigor N. Grigorov ◽  
Kathryn Ross
Keyword(s):  
Linear Accelerator ◽  
Maximum Dose ◽  
Water Tank ◽  
Surface Distance ◽  
Positional Uncertainty ◽  
Depth Dose ◽  
Diode Detector ◽  
Tank System ◽  
Output Factors ◽  
Electron Radiotherapy

AbstractDosimetric changes caused by the positional uncertainty of centring a small electron cutout to the machine central beam axis (CAX) of the linear accelerator (linac) were investigated. First, six circular cutouts with 4 cm diameter were made with their centres shifted off from the machine CAX for 0, 2, 4, 6, 8 and 10 mm using the 6 × 6 cm2 applicator. Then, the percentage depth doses (PDDs) at the machine CAX and cutout centre were measured using the 4, 9 and 16 MeV clinical electron beams produced by a Varian 21 EX linac. The cross- and in-line axis beam profiles were measured at depth of maximum dose (dm) and source-to-surface distance equal to 100 cm using a scanning water tank system and diode detector. When the cutout centre was shifted away from machine CAX for the electron beam with low energy of 4 MeV, the dm, depths of the 80 (R80) and 90% (R90) depth dose at the machine CAX had no significant change (<0.1 mm). For higher energies of 9 and 16 MeV beams, the dm were reduced with 0.45 and 1.63 mm per mm off-axis shift between the cutout centre and the machine CAX, respectively. The R80 and R90 were reduced with 0.7 mm per mm off-axis shift for both energies. When there was a 4 mm off-axis shift, the relative output factors for the 4, 9 and 16 MeV beams were reduced with 0.8, 1.6 and 0.5%, respectively. The isodose coverage of the in-line axis beam profile was reduced when the cutout centre was shifted away from machine CAX. It is important for radiation oncologists, dosimetrists, therapists and physicists to note such dosimetric changes in the electron radiotherapy to the patient, because such positional uncertainty is unavoidable in fabricating an electron cutout in the mould room.

CHARACTERIZATION OF 27 MEV PROTON BEAM GENERATED BY TOP-IMPLART LINEAR ACCELERATOR

2018 ◽  
Vol 180 (1-4) ◽  
pp. 329-333 ◽  
Author(s):  
C De Angelis ◽  
A Ampollini ◽  
E Basile ◽  
E Cisbani ◽  
S Della Monaca ◽  
...  
Keyword(s):  
Proton Beam ◽  
Linear Accelerator

Technical Note: Dosimetric characterization of the dynamic beam flattening MLC sequence on a ring shaped, Jawless Linear Accelerator with double stacked MLC

2020 ◽  
Vol 47 (3) ◽  
pp. 948-957 ◽  
Author(s):  
Douglas Bollinger ◽  
Eric Laugeman ◽  
Taoran Li ◽  
Jessica Hilliard ◽  
Ana Heermann ◽  
...  
Keyword(s):  
Linear Accelerator ◽  
Technical Note

scholarly journals Characterization of the THz radiation source at the Frascati linear accelerator

2013 ◽  
Vol 84 (2) ◽  
pp. 022703 ◽  
Author(s):  
E. Chiadroni ◽  
M. Bellaveglia ◽  
P. Calvani ◽  
M. Castellano ◽  
L. Catani ◽  
...  
Keyword(s):  
Linear Accelerator ◽  
Radiation Source ◽  
Thz Radiation
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