Definition
A chest tomogram is a picture of the chest area created by moving the x-ray machine in one direction while moving the recording film the other way. This method blurs structures in front of and behind the area of the chest being studied.
Alternative Names
Laminography; Planigraphy; Stratigraphy; Tomogram - chestHow the Test is Performed
The test is performed in a hospital radiology department or in the health care provider's office by an x-ray technician. You will be asked to lie on your back on the x-ray table. You should not move during the test, as this will affect the image quality.
How to Prepare for the Test
Tell the health care provider if you are pregnant. You must wear a hospital gown and remove all jewelry.
How the Test Will Feel
There is generally no discomfort associated with tomography.
Why the Test is Performed
A chest tomogram can show certain problems with the lungs, such as tumors or the breakdown of tissue.
What Abnormal Results Mean
Abnormal results may suggest:
- Lesions or tumors in the lungs
- Widening or narrowing of the bronchial (air) tubes
Risks
There is low radiation exposure. X-rays are monitored and regulated to provide the minimum amount of radiation exposure needed to produce the image. Most experts feel that the risk is low compared with the benefits. Pregnant women and children are more sensitive to the risks.
Considerations
In most medical centers, computed tomography (CT) has replaced the use of this technique.