Which imaging modality is typically used to evaluate basilar skull fracture?

Which imaging modality is typically used to evaluate basilar skull fracture?

• A. MRI
• B. Ultrasound
• C. CT
• D. X-ray

Answer: (D)

The key idea is that you need imaging that clearly shows the bony skull base in the setting of trauma. In this scenario, computed tomography of the head without contrast is the imaging study of choice because it quickly provides high-resolution, multiplanar views that accurately reveal fracture lines at the skull base and any associated intracranial injuries. Plain X-ray studies are much less sensitive for basilar fractures and can miss injuries, especially near the skull base, so they’re not reliable as the primary test. MRI, while excellent for soft tissue and vascular detail, is not ideal for acute evaluation of bone injury because it’s slower and bone fractures are better seen on CT. Ultrasound has no practical role in assessing skull base fractures due to limited access to the skull base structures. So, CT is the best initial imaging choice for suspected basilar skull fracture.

The key idea is that you need imaging that clearly shows the bony skull base in the setting of trauma. In this scenario, computed tomography of the head without contrast is the imaging study of choice because it quickly provides high-resolution, multiplanar views that accurately reveal fracture lines at the skull base and any associated intracranial injuries. Plain X-ray studies are much less sensitive for basilar fractures and can miss injuries, especially near the skull base, so they’re not reliable as the primary test. MRI, while excellent for soft tissue and vascular detail, is not ideal for acute evaluation of bone injury because it’s slower and bone fractures are better seen on CT. Ultrasound has no practical role in assessing skull base fractures due to limited access to the skull base structures. So, CT is the best initial imaging choice for suspected basilar skull fracture.