TY  - BOOK
AU  - Dina Mohamed Abdelaziz Ibrahim
AU  - Nader Elsherbini , 
AU  - Wafaa Khalel , 
TI  - Study of physical and technical factors associated with small and small shaped MLC photon beam in recent radiotherapy techniques / 
PY  - 2015///
CY  - Cairo : 
PB  - Dina Mohamed Abdelaziz Ibrahim , 
KW  - LINAC head designs
KW  - MONACO
KW  - Small irregular field size
N1  - Thesis (Ph.D.) - Cairo University - Faculty of Science- - Department of Biophysics; Issued also as CD
N2  - n this study a dosimetric measurements are done for IMRT in the buildup region with  different measurement tools (Gafchromic films, parallel plate ion chamber and TPS)  at different gantry angle to assess the discrepancies in this region figure (3-1) and  table (3-1).The study provide also the most accurate collimation method in the small  fields either MLC only or MLC+Jaws to assess which of them can help the treatment  planning system tabulated dosimetric functions to introduce a precise dose  calculation. In the same way assessments of the output factor and leaf transmission  are measured. Technical and dosimetric parameters related to the use of small shaped  MLC field size are investigated in terms of the evaluation of MONACO version 3.3.0  versus XIO version 5.0.0, biological and physical optimization and dynamic and static  MLC, using the chair, penumbral and different doses tests. This study revealed that  the beam data measurements that will be used in the modeling of small shaped MLC  field sizes have to be measured by MLC only without jaws to mimic the real  condition of using MLC in shaping small irregular fields. Also, the results indicate  that MONACO biological optimization is better than XIO physical optimization.  Dynamic plan delivery is time saving more than static plans with no side effect on the  plan quality
UR  - http://172.23.153.220/th.pdf
ER  -