Osama Ahmed Yousef <br/><br/>
Importance of verification films in radiotherapy treatment set - up in head and neck cancer as compared to pelvic tumors /  
Osama Ahmed Yousef ; Supervised Hassan Abd El moneim , Lobna M.Sedky , Manal ElBaradie 
 - Cairo :   Osama Ahmed Yousef ,   2006 
 - 150p :   ill ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - National Cancer Institute - Department Of Oncology Radiation and Radiotherapy 
<br/><br/> 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 
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<br/><br/><label>Subjects--Index Terms: </label>quality assurance