The Advantages of Three Dimensional Techniques (3D) in Pituitary Adenoma Treatment
IOSR Journal of Dental and Medical Sciences
The background of this study is to evaluate 3D dose distribution in organs at risk (OARs). The sample of the study consists of 300 patients; with age-range mean and standard deviation (35 ± 2.32 respectively). The CT simulator was used to collect data to delineate pituitary adenoma including growth target volume (GTV) and planning target volume (PTV 95%) as an isodose line for treatment protocol in order to obtain dose distribution of 3D dose coverage to the target while sparing organs at
... ing organs at risks. The main results of this study were, 3D dose distribution is safe, because it confines the dose to gross target volume only, while sparing escalating dose to the organ at risks (OARs), the average dose reaching the organs at risks during the pituitary adenoma to the adjacent critical organs are such as: in temporal lobe is 1.14 Gy, in eye is 0.86 Gy, and in optic chiasm is 0.95 Gy. Therefore, it is concluded that the 3D dose distribution in pituitary adenoma treatment reduces an unnecessary radiation to critical organs. Thus, new technique needs to be developed to halt an unnecessary dose reaching organs at risks during treatment.