Pressure-based Compression Guidance of the Breast in Digital Breast Tomosynthesis Using Flexible Paddles Compared to Conventional Compression.

ABSTRACT

OBJECTIVE: We investigated the effect of introducing a pressure-based flexible paddle on compression parameters and user and patient experience of digital breast tomosynthesis (DBT) combined with patient-assisted compression or technologist compression. METHODS: After institutional review board approval, women with a DBT appointment who gave informed consent received pressure-based flexible paddle breast compression. Eight lights on the paddle were illuminated (1.9 kPa per light) as pressure was applied, aiming for an 8-13.9 kPa target range. The compression level was applied by the technologist or the participant utilizing a remote control device. The participant's and technologist's experiences were assessed by a questionnaire. Compression parameters were compared to previous examinations. Comparative statistics were performed using t-tests. RESULTS: Pressure-based compression (PBC) was judged to be similar or more comfortable compared with previous traditional exams (80%, 83/103), and 87% (90/103) of participants would recommend PBC to friends. Pressure variability decreased for craniocaudal (CC) views (-55%, P < 0.001) and mediolateral oblique (MLO) views (-34%, P < 0.0001). Subgroup analysis showed a similar glandular dose for CC views, while breast thickness was reduced (-3.74 mm, P < 0.0001). For MLO views, both glandular dose (-0.13 mGy, P < 0.0001) and breast thickness were reduced (-6.70 mm, P < 0.0001). Mean compression parameters were similar for technologist compression and patient-assisted examinations. CONCLUSION: Use of the pressure-based flexible paddle in DBT, with or without patient-assisted compression, improved participant and technologist experience and reduced compression pressure variability, mean breast thickness, and glandular dose.