CT Maxillofacial (Trauma) — Dictation, Appropriateness, and Dose for Residents

1. The Stat Facial Trauma CT: A Systematic Approach

You get the call from the ED. Motor vehicle collision, patient has significant facial swelling and ecchymosis. The trauma team has done the primary survey, and now the stat non-contrast CT of the facial bones is on your list. Your attending expects a systematic, structured read that doesn’t miss a single component of a complex fracture pattern. They want to know: Is it a Le Fort? Is the orbit involved? Is there a risk of a CSF leak? This isn’t just about spotting the big fracture line; it’s about mapping the full extent of the injury in three dimensions to guide the OMFS or plastics team.

When I was a resident, the sheer number of bones and sutures in the face felt overwhelming. But like anything in radiology, it comes down to having a repeatable search pattern. We’ll walk through that pattern, give you a solid template, and cover the key findings that make you look like a pro. For more high-yield guides like this, check out our free residents and fellows resource hub.

2. What a CT of the Facial Bones for Maxillofacial Trauma Covers and What Attendings Look For

A dedicated maxillofacial CT is a high-resolution, thin-slice non-contrast study designed to do one thing exceptionally well: delineate fractures of the facial skeleton. The mandatory coronal and sagittal reformations are where the money is, especially for orbital and skull base involvement. While the bone algorithm images are primary, the soft tissue windows are critical for identifying emergent complications.

Attendings expect your report to answer these key clinical questions systematically:

• Orbital Injury: Is there an orbital floor or medial wall blowout? Is there evidence of extraocular muscle entrapment (e.g., inferior rectus)? Is the globe intact? Is there a vision-threatening retrobulbar hematoma?
• Midface Fractures (Le Fort & ZMC): Is there a Le Fort I, II, or III pattern? (Remember, they are often mixed and asymmetric). Is there a Zygomaticomaxillary Complex (ZMC) or “tripod” fracture?
• Naso-orbito-ethmoidal (NOE) Fractures: Is this complex, high-impact fracture pattern present?
• Mandibular Fractures: Where is the fracture (condyle, ramus, angle, body, parasymphyseal)? Crucially, since the mandible is a ring, a fracture in one location often means a second, contralateral fracture (e.g., parasymphyseal fracture with a contralateral condylar fracture).
• Skull Base & Sinus Involvement: Does the fracture extend through the posterior wall of the frontal sinus or the cribriform plate? This is a high-risk feature for a CSF leak and requires an immediate heads-up to the clinical team.

3. Radiology Report Template for CT Facial Bones (Maxillofacial Trauma)

This template provides a systematic framework. Start by scrolling the axials to get the lay of the land, then jump to coronals for the orbits and sagittals for the nasal bones and mandible. Dictate your findings into a macro based on this structure.

Technique

Non-contrast helical CT of the facial bones was performed with axial acquisition and multiplanar reformations in bone and soft tissue algorithms.

Findings

Orbits: Globes are symmetric and intact. No evidence of lens dislocation or intraocular hemorrhage. No retrobulbar hematoma. The extraocular muscles appear normal without evidence of entrapment. No acute orbital compartment syndrome. [Describe orbital wall fractures, e.g., “Comminuted fracture of the left orbital floor with inferior herniation of orbital fat into the maxillary sinus, consistent with a blowout fracture.”]

Nasal Bones and Septum: [e.g., “Comminuted fractures of the nasal bones and nasal septum.”]

Maxilla and Zygoma (Midface): [Describe Le Fort and ZMC patterns here. e.g., “Fractures extend transversely through the maxilla superior to the hard palate, consistent with a Le Fort I fracture. Additionally, fractures involve the bilateral inferior orbital rims and nasal bridge, consistent with a pyramidal Le Fort II pattern. The zygomaticofrontal sutures are intact. No evidence of a ZMC tripod fracture.”]

Mandible: [e.g., “Nondisplaced fracture through the right mandibular angle. A second, minimally displaced fracture is noted at the left parasymphysis. The temporomandibular joints are unremarkable.”]

Paranasal Sinuses and Skull Base: [e.g., “Opacification of the bilateral maxillary sinuses, consistent with hemorrhage related to fractures. The posterior wall of the frontal sinus is intact. The cribriform plate is intact.”]

Soft Tissues: [e.g., “Diffuse subcutaneous emphysema and soft tissue swelling throughout the midface.”]

Visualized Intracranial Structures: No evidence of acute intracranial hemorrhage on these limited soft tissue windows.

Impression

1. [Summarize the most critical findings first, e.g., “Complex facial fractures including a bilateral Le Fort II pattern and a left orbital floor blowout fracture with herniation of orbital fat.”]
2. [e.g., “Nondisplaced fractures of the right mandibular angle and left parasymphysis.”]
3. [e.g., “No evidence of retrobulbar hematoma, extraocular muscle entrapment, or fracture of the posterior frontal sinus wall to suggest high risk for CSF leak.”]

4. Free Template Sources for Your On-Call Toolkit

Building a personal library of templates is a key part of residency. While you’ll develop your own over time, starting with a solid base is smart. Beyond your institution’s shared macros, two great free repositories exist that are curated by radiologists:

• RadReport.org: Maintained by the RSNA, this is a comprehensive library of peer-reviewed templates covering nearly every modality and subspecialty.
• Radiology Templates (AU): An excellent, straightforward library managed by Australian radiologists with clean, practical templates for daily use.

5. The Next-Level Move: From Free-Form Dictation to Structured Report

The challenge with complex trauma isn’t just seeing the findings; it’s organizing them into a clear, structured report that a surgeon can act on. This is where AI-powered tools can streamline your workflow. Instead of meticulously navigating a structured template field by field, you can dictate your positive findings in a more natural, free-form paragraph. The AI then parses your dictation and maps it to the correct sections of a pre-built, ACR-compliant template.

For example, you could dictate, “There’s a comminuted fracture of the left orbital floor with fat hanging down into the max sinus, looks like a blowout. Also see a Le Fort II pattern,” and the system structures it correctly under the “Orbits” and “Maxilla” sections. Tools like GigHz Precision AI are designed for this, aiming to give you the speed of free-form dictation with the quality and clarity of a perfectly structured report. When applicable, it can also automatically fire the appropriate Clinical Decision Support (CDS) popups for frameworks like LI-RADS or Bosniak, though none are required for this specific facial trauma template.

6a. When Should You Order a CT of the Facial Bones? ACR Appropriateness Criteria

The American College of Radiology (ACR) provides evidence-based guidelines to help clinicians choose the right test. For the clinical scenario of “Imaging of Facial Trauma Following Primary Survey,” the guidance is clear.

For a patient with suspected midface or complex facial fractures after blunt trauma, a CT of the maxillofacial bones without IV contrast is Usually Appropriate. This is the workhorse examination and provides the necessary detail for diagnosis and surgical planning.

Alternatives are limited in this setting. Plain films of the facial bones are now considered a legacy examination and are Usually Not Appropriate due to their low sensitivity for complex fractures. An MRI may be appropriate in specific circumstances where the primary clinical question is related to soft tissue injury, such as suspected optic nerve injury or traumatic brain injury, but it is not the first-line test for evaluating the bony structures.

6b. How Much Radiation Does a CT of the Facial Bones Deliver?

Patients and referring providers are increasingly aware of radiation dose, and it’s good practice to know the general numbers. A focused, non-contrast CT of the facial bones is a relatively low-dose study compared to body imaging.

The estimated effective dose for a standard facial bone CT is approximately 0.5-1 mSv. To put that in perspective, this is in the lowest tier of radiologic procedures (☢☢ 0.1-1 mSv per the ACR’s Relative Radiation Level). It’s equivalent to a few months of natural background radiation. Using a focused field of view (FOV) that extends only from the frontal sinus to the mandibular symphysis is a key dose-reduction technique, as it avoids irradiating the radiosensitive thyroid gland and brain parenchyma unnecessarily.

6c. CT Facial Bones (Maxillofacial Trauma) Imaging Protocol — Phases, Contrast, and Reconstructions

A high-quality facial trauma CT depends on thin-slice acquisition and meticulous reconstructions. The goal is to maximize spatial resolution to see fine fracture lines. This is a non-contrast study, so the protocol is straightforward but requires attention to detail from the technologist.

The acquisition is a single helical scan from the top of the frontal sinus through the bottom of the mandibular symphysis. From this single dataset, multiple reconstruction series are generated in both bone and soft-tissue algorithms.

Common protocol pitfalls: The most common error is acquiring slices that are too thick. Facial fractures can be incredibly subtle, and a 3 mm or 5 mm acquisition will miss non-displaced fractures of the orbital floor or zygomatic arch. Insisting on the thinnest possible acquisition (e.g., 0.6 mm) and subsequent 1-2 mm reformations is critical for diagnostic accuracy.

7. The 3-Months-Free Offer for Radiology Residents and Fellows

Look like a rockstar on your reports. We’re offering 3+ months of free access to GigHz Precision AI for all radiology residents and fellows.

The value proposition is simple: dictate your positive findings in free form, and our AI generates a clean, structured report using ACR and SIR templates. The appropriate Clinical Decision Support (CDS) frameworks fire automatically, guiding you to the right classification without having to look it up mid-read. All we ask in return is your feedback so we can keep improving the product for trainees.

To apply, just send us an email with these three items:

1. Your PGY year (e.g., PGY-2, PGY-4)
2. Your training type (e.g., radiology residency, IR fellowship, neuro fellowship)
3. Your training program / hospital name

That’s it. No credit card, no long forms. You’ll be set up with an account quickly. To get started, apply for the residents free-access program.

8. Frequently Asked Questions

Is GigHz Precision AI HIPAA-compliant?

Yes. The platform is designed for de-identified workflows by default. No patient-identifying information (PHI) is required to use the tool to structure your report findings. It operates securely within HIPAA guidelines.

Does this require a complex IT setup at my hospital?

No. GigHz Precision AI is browser-based and requires no local software installation or special permissions from your IT department. It works on any modern web browser, including the one on your call-room workstation or personal iPad.

How does this work with PowerScribe or other dictation systems?

It works alongside your existing dictation system. You can dictate your findings, use the AI to structure them into a perfect template, and then copy-paste the final, clean report back into PowerScribe or your EMR. It’s a workflow enhancement, not a replacement.

Can I customize the templates?

Yes. While the system comes pre-loaded with standard ACR and society-level templates, you can customize them or build your own to match your personal preferences or your institution’s required format.

What happens after my residency or fellowship ends?

The free access is for the duration of your training. After you graduate, you can choose to transition to a paid plan for practicing radiologists. There is no obligation to subscribe.