A new computer-aided diagnostic tool developed by King Abdullah University of Science & Technology (KAUST) scientists could help overcome some of the challenges of monitoring lung health following viral infection.
The new method developed by KAUST — known as Deep-Lung Parenchyma-Enhancing (DLPE) — overlays artificial intelligence algorithms on top of standard chest imaging data to reveal otherwise indiscernible visual features that indicate lung dysfunction.
“Through DLPE augmentation, radiologists can discover and analyze novel sub-visual lung lesions,” says computer scientist and computational biologist, Xin Gao. “Analysis of these lesions could then help explain patients’ respiratory symptoms, allowing for better disease management and treatment,” he adds.
Gao and members of his team created the tool, along with artificial intelligence researcher and current KAUST Provost Lawrence Carin and clinical collaborators from Harbin Medical University in China.
The method first eliminates any anatomical features not associated with the lung parenchyma; the tissues involved in gas exchange serve as the main sites of COVID-19–induced damage. That means removing airways and blood vessels, and then enhancing the pictures of what is left behind to expose lesions that might be missed without the computer’s help.
The researchers trained and validated their algorithms using computed tomography (CT) chest scans from thousands of people hospitalized with COVID-19 in China. They refined the method with input from expert radiologists and then applied DLPE in a prospective fashion for dozens of COVID-19 survivors with lung problems, all of whom had experienced severe disease requiring intensive care treatment. In this way, Gao and his colleagues demonstrated that the tool could reveal signs of pulmonary fibrosis in COVID long-haulers, thus helping to account for shortness of breath, coughing and other lung troubles. A diagnosis, he suggests, that would be impossible with standard CT image analytics.
“With DLPE, for the first time, we proved that long-term CT lesions can explain such symptoms,” Gao says. “Thus, treatments for fibrosis may be very effective at addressing the long-term respiratory complications of COVID-19.”
Although the KAUST team developed DLPE primarily with post-COVID recovery in mind. They also tested the platform on chest scans taken from people with various other lung problems, including pneumonia, tuberculosis and lung cancer. The researchers showed how their tool could serve as a broad diagnostic aide for all lung diseases, empowering radiologists to, as Gao puts it, “see the unseen.”