A new study utilizing PREFUL MRI has identified significant lung abnormalities in children suffering from long Covid without using radiation or contrast dyes. The advanced scans revealed reduced blood flow and mismatches in ventilation-perfusion, correlating with severe symptoms such as chronic fatigue and increased heart rate. A new study utilizing PREFUL MRI has identified significant lung abnormalities in children suffering from long Covid without using radiation or contrast dyes. The advanced scans revealed reduced blood flow and mismatches in ventilation-perfusion, correlating with severe symptoms such as chronic fatigue and increased heart rate. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle