MDCT pulmonary angiography is replacing the ventilation-perfusion lung scan to diagnose suspected pulmonary embolism in hospitalized patients, say researchers from Rhode Island Hospital in Providence.

How Does a VQ Scan Work? The VQ scan is a nuclear scan. It measures airflow, called ventilation, and blood flow, called perfusion, in your lungs. The V and Q make up a math equation that helps doctors ...

When you breathe, a certain fraction of your air enters the lungs and blood flows through the capillaries. When this ratio is above or below 0.8, you may have ventilation/perfusion (V/Q) mismatch. A V ...

Abnormal lung scans obtained from patients with pulmonary embolism, pulmonary tuberculosis, chronic obstructive pulmonary disease and carcinoma of the lung were analyzed in an attempt to classify the ...

Comparison with ground truth: Neural network-produced CT ventilation images (a–c) and Galligas PET ventilation images (d–f) for a high-correlation case. (Courtesy: CC BY 4.0/Med. Phys.