Positron emission mammography: initial clinical results

Area of Science:

• Nuclear medicine
• Radiology
• Oncology

Background:

• Evaluating high-risk mammograms presents a significant clinical challenge.
• Functional breast imaging, such as positron emission mammography (PEM), can enhance lesion detection when combined with mammography.
• A prospective study was conducted using PEM in women undergoing stereotactic breast biopsy.

Purpose of the Study:

• To assess the safety, feasibility, and accuracy of positron emission mammography (PEM) in evaluating lesions identified in high-risk mammograms.
• To determine the efficacy of lesion-to-background ratios in differentiating malignant from benign breast lesions.

Main Methods:

• 16 patients with 18 lesions scheduled for stereotactic breast biopsy were prospectively studied.
• Patients received an injection of 2-[18F] fluorodeoxyglucose, followed by PEM imaging before biopsy.
• PEM images were analyzed by comparing lesion count density to background, calculating a lesion-to-background ratio.

Main Results:

• A lesion-to-background ratio greater than 2.5 was a strong indicator of malignancy.
• PEM demonstrated a sensitivity of 86%, specificity of 91%, and overall diagnostic accuracy of 89%.
• No adverse events were reported during or after PEM imaging.

Conclusions:

• Positron emission mammography (PEM) is a safe and feasible imaging modality for high-risk mammograms.
• A lesion-to-background ratio threshold of 2.5 is a reliable indicator for identifying malignant breast lesions.
• Further development of PEM technology is supported by these encouraging initial findings.