Ronan Smith, a postdoctoral research fellow at Adelaide University, has been awarded the prestigious Physics in Medicine & Biology (PMB) Early Career Researcher Award for his groundbreaking work in X-ray velocimetry (XV). This award recognizes the best paper in PMB's 2025 Early Career Researcher Focus Collection, and Smith's research has opened up exciting possibilities in the field of lung imaging and treatment.
Unlocking the Potential of XV Imaging
Smith's research focuses on XV, a novel imaging technique that utilizes X-rays to track lung motion during breathing and create 3D maps of local ventilation. In his award-winning paper, "Visualising ventilation changes following endobronchial valve placement with x-ray velocimetry functional lung imaging," Smith explores the potential of XV to detect changes in lung function after the insertion of endobronchial valves (EBVs).
EBVs are one-way valves placed in the lungs to treat emphysema, a condition that damages air sacs, making breathing difficult. Smith's study proposes that XV functional lung imaging can non-invasively measure regional and local changes in airflow, providing a more accurate assessment of EBV placement's clinical impact.
The study involved a pilot on healthy sheep, which have similar lung sizes to humans. By recording fluoroscopic videos of individual breaths at various angles, the researchers used XV LVAS software to correlate motion with CT data, creating 3D maps of specific ventilation. This allowed them to visualize and quantify the reduction in airflow to areas downstream of the valves, even in regions where collapse was not visible on CT scans.
A Dynamic Approach to Lung Imaging
"The lungs are a dynamic organ, and XV imaging allows us to see exactly where air is or isn't flowing," Smith explains. "CT only measures structural changes, which may not correlate with lung function changes. XV imaging provides a more comprehensive view of lung dynamics."
The study's findings have significant implications for emphysema treatment. By using XV imaging, healthcare professionals can better place and verify EBVs, leading to improved treatment options for patients. This non-invasive approach has the potential to revolutionize lung function assessment and treatment planning.
Expanding Horizons: Dark-Field X-ray Imaging
Building on his success, Smith is now exploring another novel X-ray imaging method: dark-field X-ray imaging. This technique, which he is developing as an early-career researcher, has already shown promise in delivering gene therapy using nanoparticles. The world's first pediatric clinical trial of XV imaging is currently underway, examining its feasibility in children with cystic fibrosis.
A Well-Deserved Recognition
Smith's achievement of winning the PMB Early Career Researcher Award is a testament to his dedication and expertise. He acknowledges the collaborative nature of the project, involving clinicians, scientists, and the preclinical imaging facility staff. This award not only recognizes his scientific contributions but also serves as a powerful tool to secure funding for his ongoing research.
In conclusion, Ronan Smith's work in X-ray velocimetry has opened new doors in lung imaging and treatment. His innovative approach to assessing lung function and his dedication to advancing medical imaging techniques make him a rising star in the field. As he continues to explore dark-field X-ray imaging and other applications, the future of medical imaging looks brighter than ever.
