X-ray Facial Bones, Zygomatic Arch Views

What This Test Is

A zygomatic arch X-ray is an imaging study that uses low-dose radiation to create pictures of the bony arch that forms the prominence of each cheek. It is a type of facial bone X-ray, and the technologist takes several views so the arch can be seen from different angles.

Why It Is Ordered

Doctors usually order this study after a blow to the face, a fall, or a motor vehicle accident when there is concern about a cheekbone fracture. It may also be used when someone has facial pain, swelling, bruising, or difficulty opening the mouth after an injury.

How the Exam Is Done

You will sit or lie still while the technologist positions your head at specific angles. You may be asked to hold your breath briefly or to keep your mouth open or closed for certain views. The test itself is painless and usually takes only a few minutes, though you may feel mild pressure from the positioning equipment.

What the Images Can Show

The radiologist looks for breaks in the bone, displacement of the arch, and signs of swelling in the soft tissue around the cheek. The images can help distinguish an isolated arch fracture from injuries that also involve the eye socket or upper jaw.