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. This allows for a more detailed view of a specific level within the chest cavity.

A chest tomogram can show certain problems with the lungs, such as tumors or the breakdown of tissue.

The test is performed in a hospital radiology department 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.

Tell the health care provider if you are pregnant. You must wear a hospital gown and remove all jewelry.

There is generally no discomfort associated with tomography.