Ventilation-Perfusion (VQ) Scan Interpretation and Reporting
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We provide online interpretation and reporting of Ventilation-Perfusion (VQ) scans. The reporting will be done by nuclear medicine specialists from India and USA and reports will be delivered within 24-48 hours.
Ventilation-Perfusion (VQ) Scan is a scintigraphic examination of lung which is basically done to evaluate ventilation (airflow) of bronchoalveolar tree and perfusion (blood flow) of pulmonary vasculature.
Firstly a chest radiograph is taken to rule out any previously present perfusion defects (eg. atelectasis).
The scan is carried out in two phases:
Radio-isotope labeled aerosols (Technetium-99mDTPA) are delivered to the patient through a non-rebreathing mask/ nebuliser for a few minutes, images are taken with the patient in supine position in three phases: inhalation, equilibrium and exhalation, at different angles. The aerosol particles are small enough to reach the distal tracheobronchial tree and reflect regional ventilation.
For perfusion scan, radioactive material is injected into a vein in the arm (Tc-99m MAA) intravenously in the supine position. The MAA particles are small enough to get lodged in the pre-capillary arterioles then images are taken using a gamma camera with high resolution and large field of view.