TY  - GEN
AU  - Osama Ahmed Yousef
AU  - Hassan Abd El moneim , 
AU  - Lobna Mohamed Sedky , 
AU  - Manal ElBaradie , 
TI  - Importance of verification films in radiotherapy treatment set - up in head and neck cancer as compared to pelvic tumors / 
PY  - 2006///
CY  - Cairo : 
PB  - Osama Ahmed Yousef , 
KW  - quality assurance
N1  - Thesis (M.Sc.) - Cairo University - National Cancer Institute - Department Of Oncology Radiation and Radiotherapy; Issued also as CD
N2  - Aim of study was to quantify the extent of set - up errors and to develop a quality assurance program using port films in the radiation oncology department ; NCI , CairoIt included 5 head and neck and 5 pelvic cancer patients for whom 108 films were takenFilm visibility was excellent in 62in hundered and 68n hundered of pelvic and head and neck films , respectivelyFilm rejection rates were 29in hundered and 28in hundered in the pelvis and the head and neck , respectivelyThe most common cause of film rejection was centering errors in pelvic films while in head and neck films , it was shielding errors
UR  - http://172.23.153.220/th.pdf
ER  -