Patients with clinical suspicion of: Acute pulmonary embolism with or without comorbidities such as COPD, left heart failure, pneumonia, and tumors.Chronic thromboembolic pulmonary hypertension.Right to left cardiac shunts. As pre-operative preparation for patients with operable lung neoplasm. As well as Pre-operative evaluation and post-operative monitoring in lung transplant patients.
Complementary CT scan or X-ray of the chest is acquired within 24 hours of the V/Q scan. Other investigations done prior to the scan should be delivered by the patient for review by the nuclear medicine physician before the scan including radiological modalities (e.g. echocardiography, CTPA, lower limb Doppler..) as well as Laboratory tests (e.g. D-dimer level..)
Patients should stay away from children (less than 12 years of age) and pregnant ladies, for at least 24 hours starting after administration of the radiotracer.