Do doctors still use vq scans?

Yes: Still used to evaluate for pulmonary emboli in patients that can't have cta of pulmonary arteries. Can be used to evaluate patient for surgery. See radiologyinfo.Org.

Yes: Vq scans are still performed but not available 24 hours / 7 days per week in all institutions. Vq is often performed if there is a contraindication to ct scan such as increased creatinine level. Vq scans are also used sometimes in pregnant females to decrease radiation dose.