Introduction:
currently, mammography is one of the best methods for breast cancer screening. One of the most important factors in breast cancer risk, as well as the dose and sensitivity of mammography is breast tissue composition and another effective factor in breast dose is thickness and size the breast. This study was designed to investigate the relationship between glandular dose and breast tissue composition and thickness.
Method:
This cross-sectional study was performed on 286 clients in a period of six months in the second half of 2020 - 21 and demographic information, history of surgery, chemotherapy and radiotherapy through a questionnaire and information about the composition of breast tissue with a, b, c , d level According to reports, mammography images were collected by a radiologist, as well as information about the received dose of each breast and its thickness by examining digital mammography images
on 1132 images. Multivariate linear regression was used to analyze the data
Findings:
Based on the results, there is a significant relationship between glandular dose and type of breast tissue (a, b, c, d)
Type a has a lower absorption dose and type d has a higher absorption dose. (P <0/05) Also, the amount of absorbed dose of the patient has a significant relationship with the thickness and size of breast tissue, which increases with    increasing       thickness,                  the amount of absorbed dose of the patient and in MLO images due to increasing thickness, the amount of absorbed dose is higher than
CC images of breast.( P <0/05)
In general, the absorbed dose is higher in patients with denser tissue and greater thickness, to whom radiation management is important.
Keywords: Digital mammography, Breast tissue composition, Glandular absorption dose, Breast tissue thickness