Dose Attenuation in the Mid-Cranial Fossa with 6 MV hoton Beam Irradiations.
- Author:
Jeong Ho PARK
1
;
Tae Jin CHOI
;
Ok Bae KIM
Author Information
1. Department of Radiotion Oncology, College of Medicine, Keimyung University, Taegu, Korea.
- Publication Type:Original Article
- Keywords:
Bone correction factor;
TLD;
Mid-cranial fossa
- MeSH:
Bone and Bones
- From:Journal of the Korean Society for Therapeutic Radiology
1990;8(1):125-132
- CountryRepublic of Korea
- Language:English
-
Abstract:
In X-ray irradiation, dose distribution depends on multiple parameters, one of them being tissue inhomogeneity to change the dose significantly. Cpnsoderable dose attenuation through the mid-cranial fossa is expected because of various bony structures in it. Dose distribution around the mid-cranial fossa, following irradiation with 6 MV photon beam, was measured with LiF TLD micro-rod, and compared with the expected dose in the same sites. In our calculation with Cf(correction factor), the expected dose attenuation revealed about 3.74% per 1cm thickness of bone tissue. And the differences between the expected dose with correction for bone tissue and the measured dose by TLD was small, agreeing within an average variation of+/-0.21%.
