plain ct vs. cardiac gated ct

[Bigred]

Never knew there was a cardiac gated ct. Found a video that indicates the aorta changes in size from 3 to 4 mm depending on whether the heart is in systole or diastole. I knew there was some change in size but never heard anyone use an actual range before. Unless you are getting a cardiac gated ct this would explain why measurements for some of us vary up and down.

skip to 4:00 in the video for the info above:

[ link ]