Objective:

To compare the average gland dose (AGD) of unaffected breast with affected breast of clinically palpable breast tumors patients

and anlyze the c

orrelation between breast lumps

density and radiation dose.

Methods:

A total of 204 clinically palpable breast tumors patients in Fudan University Shanghai Cancer Center from January 2019 to December 2019 were collected

and were performed standard photographic examinations on the craniocaudal (CC) and mediolateral oblique (MLO) positions of bilateral breasts. Breast density

compression thickness

and radiation dose of different ages were counted to explore whether there is a correlation between breast lump and radiation dose in mammography.

Results:

A total of 204 patients

including 101 patients with right breast lumps and 103 patients with left breast lumps. According to the classification of gland types

there were 5 cases of fat type (type a)

52 cases of scattered fibroglandular type (type b)

132 cases of uneven dense type (type c)

and 15 cases of extremely dense type (type d); according to age classification

30 patients were under 40 years old

65 patients were 41-50 years old

52 patients were 51-60 years old

40 patients were 61-70 years old

and 17 patients were over 71 years old. When we comparedthe AGD of the unaffected and affected breasts of patients with breast lumps of various gland types and different ages

the AGD of the affected breast was 30.66% higher than that of the unaffected breast

and there was a statistical difference (

P

＜0.05). There were statistically significant differences in the exposure dose groups of the unaffected side and the affected side of the different breast gland types (

P

＜0.05); when we compared the exposure dose groups between the unaffected side and the affected side

the AGD of type a

b

c

and d increased by 48.34%

26.80%

28.64% and 60.71%

respectively. It can be seen that the AGD of type d increased the most，and the AGD of type b increased the least (

P

＜0.05). The AGD values of the unaffected side and the affected side in each age group had statistically significant differences within and between gr

oups (

P

＜0.05). Among them

AGD of patients older than 70 years increased the most and AGD of patients aged 41 to 50 increased the least. There was a statistical difference (

P

＜0.05).

Conclusion:

In mammography

the radiation dose of affected side is not only related to breast density and compression thickness

but also related to whether there are lumps in breast. Moreover

the AGD of the affected breast is higher than that of the unaffected side

and there are also differences in radiation doses between different age groups.