Page 189 - Hospital Authority Convention 2017

Parallel Sessions

PS8.3 Technology Advancement and Innovation 10:45 Room 423 & Room 424

An Innovative Mammographic Biopsy Technique to Meet the Challenges on a 3D Digital Breast Tomosynthesis
Detected Lesion
Leung AYH HOSPITAL AUTHORITY CONVENTION 2017
Department of Diagnostic and Interventional Radiology, Kwong Wah Hospital, Hong Kong

Background
3D Digital Breast Tomosynthesis (DBT) is getting popular in private sectors. Compared with the 2D Full Field Digital
Mammography (FFDM), tomosynthesis reduces the effect of tissue superimposition and may improve mammographic
interpretation. DBT can reduce false positive call back and increase cancer detection rate.

A recent study showed that some lesions like architectural distortion would be identified more readily in DBT (73%) than that
in 2D mammography (21%). Architectural distortion is a known mammographic finding associated with a high predictive value
for malignancy. It has been shown to be the third most commonly missed mammographic abnormality on false negative 2D
mammography.

Stereotactic biopsy examination is a common procedure in the management of breast abnormalities that is mammographic
detected only. Patients from private mammography screening sectors may be referred back to Hospital Authority (HA)
hospitals for further biospy management. However, some DBT detected architectural distortions may not be easily visualised
under our existing 2D stereotactic targeting equipment. 3D tomo-guided biopsy is not readily accessible in HA hospitals, it
is also not common and is quite expensive in private sectors. When 2D stereotactic biopsy is not feasible, patient could then
only be put for short term interval mammogram as an alternative. It is not desirable and may generate anxiety to patients.
To tackle such technical challenge and filling up the service gap, basic principle of stereotactic biopsy system has been fully
reviewed. With the additive 3D information obtained from DBT, an innovative 2D biopsy technique has been investigated for
localisation of such lesions.

In this presentation, the initial experience on the design of such technique to meet the challenges in the absence of 3D biopsy
facility at Kwong Wah hospital will be shared. Wednesday, 17 May

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