scholarly journals On the Use of a Priori Knowledge in Pattern Search Methods: Application to Beam Angle Optimization for Intensity-Modulated Radiation Therapy

2013 ◽  
pp. 279-292
Author(s):  
Humberto Rocha ◽  
Joana M. Dias ◽  
Brigida C. Ferreira ◽  
Maria do Carmo Lopes
Keyword(s):  
Radiation Therapy ◽  
A Priori ◽  
Intensity Modulated Radiation Therapy ◽  
Pattern Search ◽  
A Priori Knowledge ◽  
Beam Angle ◽  
Search Methods ◽  
Intensity Modulated ◽  
Beam Angle Optimization ◽  
Pattern Search Methods

scholarly journals The Scatter Search Based Algorithm for Beam Angle Optimization in Intensity-Modulated Radiation Therapy

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Ali Ghanbarzadeh ◽  
Majid Pouladian ◽  
Ali Shabestani Monfared ◽  
Seied Rabi Mahdavi
Keyword(s):  
Radiation Therapy ◽  
Scatter Search ◽  
Intensity Modulated Radiation Therapy ◽  
Optimization Method ◽  
Beam Angle ◽  
Intensity Modulated ◽  
Beam Angle Optimization ◽  
Dose Volume ◽  
Optimal Beam ◽  
Potential Benefits

This article introduces a new framework for beam angle optimization (BAO) in intensity-modulated radiation therapy (IMRT) using the Scatter Search Based Algorithm. The potential benefits of plans employing the coplanar optimized beam sets are also examined. In the proposed beam angle selection algorithm, the problem is solved in two steps. Initially, the gantry angles are selected using the Scatter Search Based Algorithm, which is a global optimization method. Then, for each beam configuration, the intensity profile is calculated by the conjugate gradient method to score each beam angle set chosen. A simulated phantom case with obvious optimal beam angles was used to benchmark the validity of the presented algorithm. Two clinical cases (TG-119 phantom and prostate cases) were examined to prepare a dose volume histogram (DVH) and determine the dose distribution to evaluate efficiency of the algorithm. A clinical plan with the optimized beam configuration was compared with an equiangular plan to determine the efficiency of the proposed algorithm. The BAO plans yielded significant improvements in the DVHs and dose distributions compared to the equispaced coplanar beams for each case. The proposed algorithm showed its potential to effectively select the beam direction for IMRT inverse planning at different tumor sites.

scholarly journals Pattern search methods framework for beam angle optimization in radiotherapy design

2013 ◽  
Vol 219 (23) ◽  
pp. 10853-10865 ◽  
Author(s):  
H. Rocha ◽  
J.M. Dias ◽  
B.C. Ferreira ◽  
M.C. Lopes
Keyword(s):  
Pattern Search ◽  
Beam Angle ◽  
Search Methods ◽  
Beam Angle Optimization ◽  
Pattern Search Methods
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