1980 Volume 36 Issue 1 Pages 29-34
Although two opposed portals has been used for the treatment of laryngeal cancer, there are some problems such as dermatitis caused by increasing of shooting out dose, or poor centering of the X-ray to the focus of lesion. Therefore we have examine the shape and location of the tumor and the surrounding tissues by computed tomography (CT) and laryngoscopy, and two anterior oblique portals with a wedge-filter was undertaken from the fore-neck. The CT examination has made it possible to understand steroscopy state of the focus of lesion and to get accutate treatment schedule of radiation angle and field according to the individual patients. On the other hand centering of the radiation dose to the focus was improved in two anterior oblique portals method, and the beam dose to the skin was also decreased. This method has enable us appling the X-ray to the fore neck lesion, independently from the shoulder girdle.
