Abbreviated Molecular Breast Imaging: Feasibility and Future Considerations

Area of Science:

• Radiology
• Medical Imaging
• Oncology

Background:

• Molecular Breast Imaging (MBI) offers superior cancer detection compared to mammography alone.
• The extended duration of standard MBI protocols may hinder widespread adoption.
• Optimizing MBI protocols is crucial for enhancing its clinical utility.

Purpose of the Study:

• To evaluate the feasibility of an abbreviated MBI protocol using only mediolateral oblique (MLO) projections.
• To assess the performance of this abbreviated protocol in detecting and localizing breast lesions.

Main Methods:

• A retrospective, IRB-exempt, blinded reader study involving 5 fellowship-trained breast imaging radiologists.
• Independent review of 124 screening MBI cases (50% abnormal, 50% normal).
• Calculation of sensitivity, specificity, PPV, and NPV for lesion detection and localization accuracy.

Main Results:

• High mean reader performance: 96.8% sensitivity, 98.7% specificity, 98.8% PPV, and 96.9% NPV.
• 100% accuracy in localizing lesions to the medial or lateral breast.
• All readers correctly identified 97.7% of lesions with malignant or elevated risk pathology.

Conclusions:

• An abbreviated MBI protocol utilizing MLO views exclusively maintains high accuracy for lesion detection and localization.
• This shortened protocol is a feasible option for improving MBI screening efficiency.