Authors (including presenting author) :
Leung SY(1), Chiang YW(1), Mo KMC(1), Lai YTA(1)
Affiliation :
(1) Department of Radiology, Pamela Youde Nethersole Eastern Hospital, Chai Wan, Hong Kong
Introduction :
Contrast-enhanced mammography (CEM) is a radiography-based functional breast imaging technique, first approved by the United States Food and Drug Administration (FDA) in 2011. The Hong Kong East Cluster (HKEC) has been the first cluster to introduce contrast-enhanced mammography (CEM) in the Hospital Authority since 2019. This imaging modality utilizes the dual-energy technique to reflect the distribution of contrast material in breast tissues. Such technique has higher diagnostic performance than conventional mammography, with higher sensitivity for breast cancer detection. There is comparable diagnostic performance to breast magnetic resonance imaging (MRI), yet with the advantage of faster scanning time, lower cost, more readily available and better patient experience. These advantages are exceptionally helpful in this era of growing demands.
Objectives :
To evaluate whether the workflow and image acquisition of CEM in the HKEC is compliant with the international recommendation “Contrast-enhanced mammography (CEM) (A supplement to ACR BI-RADS® Mammography 2013), 2022, Carol H. Lee et al”.
To evaluate whether the repeat rate of CEM in the HKEC is within the threshold according to the Mammography Statement published by the Hong Kong College of Radiologists (HKCR).
To evaluate the clinical safety of CEM.
Methodology :
Retrospective review of consecutive cases of CEM performed from 1/2023 to 12/2023 in the HKEC. Workflow and image acquisition including contrast delivery rate, order of image projections obtained, time of image acquisition, and repeat rate were reviewed. Clinical safety parameters including contrast reaction and complications were reviewed.
Result & Outcome :
A total of 41 CEM examinations were performed in the HKEC from 1/2023 to 12/2023. Contrast delivery rate was 3 milliliter per second in all examinations. Mammographic views of the breast that required particular attention, for example breast cancer side, were obtained first in all cases. Images were obtained within 10 minutes in all examinations. These were all compliant to the international recommendations. Repeat rate was 2.5% of the total images taken, within the < 3% target recommended by the HKCR. No case of adverse reaction nor complication was reported.
