A nuclear lung test, also known as a lung perfusion scan, is a diagnostic imaging procedure that uses a small amount of radioactive material to assess blood flow to the lungs. During the test, a radioactive substance (usually radioactive albumin) is injected into a vein, and a special scanner detects the radiation emitted, creating images that reveal how well blood is circulating throughout the lungs.
Here's a breakdown of the procedure:
- Injection: A healthcare provider injects a radioactive tracer into a vein, typically in your arm. This tracer is designed to travel to the lungs.
- Scanning: You'll lie on a movable table that slides under a scanner. This scanner detects the radioactive material in your lungs.
- Image Creation: As blood flows through your lungs, the scanner tracks the radioactive particles and creates images showing the distribution of blood flow. Areas with normal blood flow will appear differently than areas with restricted or absent blood flow.
Purpose of a Nuclear Lung Scan:
This test is primarily used to detect:
- Pulmonary Embolism (PE): Blood clots in the lungs. This is one of the most common reasons for ordering a lung perfusion scan.
- Other Lung Conditions: It can also help diagnose other lung diseases or conditions that affect blood flow, such as pulmonary hypertension.
In summary, a nuclear lung test is a valuable diagnostic tool that helps healthcare professionals visualize blood flow in the lungs, primarily to detect pulmonary embolisms and other conditions affecting pulmonary circulation.
