Low-field MRI could offer clinicians a radiation-free method for assessing pulmonary sarcoidosis, according to a small prospective study. While chest CT remains the gold standard for structural imaging, researchers found 0.55-T MRI delivers critical functional measurements without ionizing radiation.
Pulmonary sarcoidosis, an inflammatory disease marked by granuloma formation, often requires repeated imaging. This can pose a long-term cancer risk, particularly for younger patients. The study compared 15 patients with the disease against 30 healthy volunteers.
The MRI showed high sensitivity for detecting consolidations at 86%, though it was less effective for reticulations and traction bronchiectases. Functional imaging identified significantly greater ventilation and perfusion defects in patients, correlating strongly with pulmonary function testing (PFT) results.
Specifically, the ventilation defect percentage (VDP) strongly correlated with the RV/TLC ratio, while the perfusion defect percentage (QDP) aligned with FEV1 measurements. Researchers suggest this complementary anatomic and functional data supports MRI as a viable follow-up tool for longitudinal monitoring, rather than a direct replacement for CT.