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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.
Diagnostic Imaging. Diagnostic imaging includes ultrasounds, X-rays, CT scans and MRIs. These create images of different parts of the body and aid in diagnosing diseases and conditions allowing for a course of treatment to be prescribed.iagnostic Imaging. Diagnostic imaging includes ultrasounds, X-rays, CT scans and MRIs. These create images of different parts of the body and aid in diagnosing diseases and conditions allowing for a course of treatment to be prescribed.