Beyond the Two-View Limit: The Case for Wide-Angle Tomosynthesis in Screening
In a dedicated symposium at the BCU 5th Conference in Lisbon, Alex Hampson Go-to-Market Manager for Women's Health at Siemens Healthineers, presents a compelling argument for shifting screening paradigms. His insights challenge the status quo, moving the conversation from simple image acquisition to a holistic approach that addresses the real barriers preventing women from returning for their next screening round.
The Reality of Falling Participation Rates
The data is stark. Across 29 European countries, screening participation rates have dropped significantly between 2011 and 2021, with most nations falling well below the 70% benchmark. Hampson identifies the root causes not as a lack of need, but as a failure to address patient concerns. Fear of a cancer diagnosis, anxiety about radiation, embarrassment regarding discomfort, and mistrust due to false positives create a formidable wall. When a patient recalls an uncomfortable or anxiety-inducing experience, the likelihood of them returning diminishes.
Redefining Image Quality and Depth Resolution
The solution lies in the physics of the acquisition. Traditional 2D mammography compresses structures onto the same pixels, making it difficult to distinguish depth. Narrow-angle DBT offers some improvement, but Hampson argues that only a 50-degree wide-angle sweep truly solves the problem. By capturing projections from -25 to +25 degrees, the system spreads structures across significantly more pixels. This superior depth resolution allows the reconstruction algorithm to clearly separate overlapping tissue, effectively removing the "maybes" that lead to callbacks. Clinical evidence, including studies by Ray Zhao at Stony Brook, confirms that this approach downgrades false positives and lowers recall rates compared to narrow-angle systems.
Safety Reimagined: Lower Dose, Higher Confidence
Perhaps most importantly, the fear of radiation is addressed with concrete data. Contrary to the belief that wider angles increase exposure, the wide-angle system delivers a lower dose to the patient, particularly those with thicker breasts. The system compensates for the wider field by increasing the number of projections, thereby reducing the dose per projection. This ensures that women with dense breasts—the group with the highest anxiety and risk—receive a safe, high-quality exam without compromising their safety.
Humanizing the Clinical Encounter
Finally, Hampson highlights that technology must be paired with empathy. Features like Optimized Compression (OPCOM) automatically adjust pressure to the minimum required, while soft-con paddles and mood lighting transform the room from a sterile clinic into a supportive space. These small touches significantly lower the barrier to entry for asymptomatic women.
In conclusion, Hampson asserts that the integration of wide-angle DBT is not just an upgrade; it is a necessary evolution. By combining superior accuracy, reduced radiation, and a compassionate patient experience, screening programs can rebuild trust, increase participation, and ultimately save more lives.
