- The use of VQ scans have decreased with the emergence of CT-Angiography
- VQ scans are still used in facilities without CT capabilities and in patients with poor kidney function that cannot have the dye associated with the CT
- A VQ scan involves a scan of perfusion and ventilation
- VQ scans use a low-risk radioisotopes
- The patient will inhale a small dose of radioisotope gas with a small injection of the radioisotope
- Radiographic images are then created potentially showing a V/Q mismatch
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