基于软件的散射校正模式对乳腺X射线检查中辐射剂量的影响

Abstract

Abstract: Purpose: This study investigated the relationship between average glandular dose and compressed thickness and gland type in the software-based Progressive Reconstruction Intelligently Minimizing Exposure (PRIME) model. The extent of average glandular dose reduction(AGD) in PRIME mode is compared to full field digital mammography (FFDM) and influencing factors. Materials and Methods: 515 female patients who underwent PRIME mode and FFDM on the left and right breast under the same compressed thickness were collected respectively. A total of 1 030 breast craniocaudal view images and 1 030 breast mediolateral oblique view images were analyzed. Results: Breast compressed thickness was positively and strongly correlated with AGD_PRIME (r=0.698, P<0.001), gland type and compressed force were positively and weakly correlated with AGD_PRIME (r=0.227,r=0.228,P<0.001), and age was negatively correlated with AGD_PRIME (r=-0.327,P<0.001 0 .Breast compressed thickness, gland type, compressed force and age were independent factors for AGD_PRIME (B_{compressed thickness}=0.025, B_{gland type}=0.238, B_{compressed force}=0.001, B_age=-0.007, P<0.001). The standardized coefficients of compressed thickness, gland type, compressed force and age were 0.735, 0.229, 0.106 and -0.244, respectively. The effect of compressed thickness on AGD_PRIME was greater than that of gland type. Breast compressed thickness and age were negatively correlated with △AGD (AGD_FFDM minus AGD_PRIME) (r=-0.565,r=-0.127,P＜0.001), while gland type was positively correlated with △AGD (r=0.159,P＜0.001). Breast compressed thickness and age were independent factors of △AGD (B_{compressed thickness}=-0.011,B_age=-0.002,the standardization coefficients were -0.558 and -0.104, respectively). Breast compressed thickness was negatively correlated with the rate of dose-reduction in PRIME mode, and linear fitting showed a higher dose reduction in thinner breasts. Conclusions: AGD_PRIME is positively correlated with breast compressed thickness, gland type and compressed force, and compressed thickness has a greater effect on AGD_PRIME. △AGD is negatively correlated with compressed thickness and age, and the effect of PRIME acquisition mode on reducing glandular dose in young patients with small breast compressed thickness is more obvious.

Key words: mammography, average glandular dose, compressed thickness, gland type

CLC Number:

R144

CHEN Lu, GAO Zhizhen. Effect of software-based scatter correction on radiation dose in mammography[J].RADIATION PROTECTION BULLETIN, 2024, 44(4): 1-6.

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Effect of software-based scatter correction on radiation dose in mammography

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