To get help with the issue youâre experiencing: 1  Go to the Support request page. 2  Select the topic you need help with and the problem youâre experiencing. 3  If you still feel that the information doesnât help, click the Continue support request button at the bottom of the screen.  Select your contact method.
Two types of lung scans are usually done together: 1  Ventilation scan. During this scan, you inhale a radioactive tracer gas or mist. 2  Perfusion scan. During this scan, a radioactive tracer is injected into a vein in your arm.
If both scans are done, the test is called a V/Q scan. The ventilation scan usually is done first. A lung scan is done to: 1  Find a blood clot that is preventing normal blood flow (perfusion) to part of a lung (pulmonary embolism).  Check the flow of blood (perfusion) or air (ventilation) through the lungs.