When to Order Imaging for Imaging of Facial Trauma Following Primary Survey: ACR Appropriateness Decoded

Based on the ACR Appropriateness Criteria®, this article provides a clinical summary of imaging recommendations for facial trauma after the primary survey.

ACR Committee: Neurologic Imaging
Last Update: 2026-05-11

When to Order Imaging for Facial Trauma Following Primary Survey: ACR Appropriateness Decoded

A patient arrives in the emergency department following a high-impact collision. After the primary survey confirms they are hemodynamically stable, your attention turns to a visibly deformed and swollen face. The patient has tenderness over the zygoma and malocclusion. You suspect a midface fracture, but the next step is critical: choosing the right initial imaging study. Ordering a non-contrast maxillofacial computed tomography (CT) is often the correct choice, but understanding the specific clinical context is key to avoiding unnecessary radiation and diagnostic delays. This guide breaks down the American College of Radiology (ACR) guidelines to help you make the most appropriate imaging decision for patients with suspected facial trauma.

What Does the ACR Guideline for Imaging of Facial Trauma Following Primary Survey Cover?

This ACR Appropriateness Criteria guideline focuses on the initial imaging of patients with suspected facial trauma after the completion of a primary survey (i.e., the patient is stable). The recommendations are organized by the suspected location of injury based on clinical findings.

The scope includes common presentations of blunt facial trauma, such as:

• Suspected frontal bone, midface (Le Fort, zygomaticomaxillary complex), nasal, and mandibular fractures.
• Clinical signs like localized tenderness, edema, deformity, malocclusion, trismus, and nerve paresthesia.

This document does not cover:

• Penetrating facial trauma.
• Imaging for suspected intracranial injury (which is a separate guideline).
• Delayed evaluation or imaging for surgical planning, which may require different protocols.
• Post-operative imaging.

What Imaging Should I Order for Facial Trauma Following Primary Survey? Recommendations by Clinical Scenario

The ACR provides specific recommendations based on the patient’s clinical presentation. For nearly all scenarios of significant suspected facial fracture, non-contrast CT is the modality of choice due to its speed and excellent bony detail.

Suspected Frontal Bone Injury
For a patient with tenderness, contusion, or edema over the frontal bone, the ACR rates both CT maxillofacial without IV contrast and CT head without IV contrast as Usually appropriate. These studies provide excellent visualization of the frontal sinuses and anterior cranial fossa, which are at risk in such injuries. Skull radiography is considered Usually not appropriate due to its low sensitivity for complex fractures.

Suspected Midface Injury
In cases of suspected midface injury—indicated by pain with upper jaw manipulation, zygomatic deformity, facial elongation, malocclusion, or infraorbital nerve paresthesia—the single most effective initial study is CT maxillofacial without IV contrast, which is rated Usually appropriate. This exam is ideal for identifying and classifying complex fractures like Le Fort, zygomaticomaxillary complex (ZMC), and orbital floor fractures.

Suspected Nasal Injury
For a patient with visible or palpable nasal deformity, tenderness, or epistaxis, CT maxillofacial without IV contrast is rated Usually appropriate. However, the ACR also notes that for isolated nasal injuries, other modalities May be appropriate, including US maxillofacial and Radiography paranasal sinuses. The decision often depends on the clinical suspicion for more extensive injury beyond a simple nasal bone fracture, which can often be managed based on clinical exam alone.

Suspected Mandibular Injury
When clinical findings suggest a mandibular injury—such as trismus, malocclusion, gingival hemorrhage, or loose/fractured teeth—CT maxillofacial without IV contrast is Usually appropriate. It is highly sensitive for detecting fractures, including those involving the condyles, which can be difficult to see on plain films. Radiography mandible May be appropriate in settings where CT is unavailable or for a very low suspicion of a simple fracture, but it is less sensitive than CT.

ACR Imaging Recommendations Table

Adult vs. Pediatric Imaging of Facial Trauma: Radiation Dose Tradeoffs

Evaluating facial trauma in children requires careful consideration of radiation exposure. The principle of As Low As Reasonably Achievable (ALARA) is paramount. The ACR provides distinct pediatric radiation relative level (RRL) estimates, which are often in a higher category than their adult counterparts for the same study. This reflects the increased lifetime attributable risk of cancer from ionizing radiation in younger patients.

While non-contrast CT remains the gold standard for diagnosing complex facial fractures in children, institutions should use pediatric-specific low-dose protocols. For less severe or isolated injuries, such as a suspected simple nasal fracture, non-ionizing modalities like ultrasound (rated May be appropriate) or a thorough clinical examination may be sufficient to guide management and avoid radiation entirely. The decision to use CT should be based on a high clinical suspicion for a fracture that would alter clinical management.

Imaging Protocol Details for Imaging of Facial Trauma Following Primary Survey

Once you’ve decided on the right study, the specific imaging protocol is essential for diagnostic quality. Our protocol guides provide detailed, scannable information on technique, contrast administration, and interpretation principles for the studies recommended in these ACR guidelines.

• CT Brain Without Contrast

Tools to Help You Order the Right Study

Navigating imaging guidelines can be complex. GigHz offers several tools designed to support evidence-based clinical decisions at the point of care.

The ACR Appropriateness Criteria Lookup provides direct access to the full, up-to-date ACR guidelines for hundreds of clinical scenarios, helping you confirm the right study for any presentation beyond facial trauma.

For detailed procedural specifics, the Imaging Protocol Library offers standardized, easy-to-read protocols for a wide range of CT, MRI, and ultrasound examinations, ensuring you know the technical details of the study you are ordering.

To help with patient communication and tracking cumulative exposure, the Radiation Dose Calculator allows you to estimate effective dose for common imaging studies and explain the associated risks to patients and their families.

When is a CT with IV contrast indicated for facial trauma?

For the initial evaluation of bony injury, IV contrast is rated Usually not appropriate. Its primary role is in cases where there is a strong clinical suspicion of vascular injury (e.g., expanding hematoma, bruit, signs of arterial dissection), or to evaluate for complex soft tissue injury or abscess formation in a delayed presentation.

Are plain radiographs (X-rays) ever sufficient for facial trauma?

Plain films have a very limited role in the modern evaluation of significant facial trauma. The ACR rates them as Usually not appropriate for suspected frontal and midface injuries. For a suspected mandibular injury, a mandible series May be appropriate, but it has a lower sensitivity than CT, especially for condylar fractures. For suspected nasal injury, radiographs also May be appropriate, but many simple nasal fractures are managed based on clinical findings alone.

What is the role of MRI in acute facial trauma?

MRI is Usually not appropriate for the initial assessment of bony facial trauma. It is slower to acquire, more susceptible to motion artifact, and less sensitive for detecting fine fracture lines compared to CT. Its utility lies in the subacute setting for evaluating specific complications, such as cranial nerve injury, soft tissue entrapment in orbital fractures, or suspected intracranial complications not well-visualized on CT.

Why is CT maxillofacial without contrast the preferred study for most facial trauma scenarios?

Non-contrast maxillofacial CT offers the best combination of speed, availability, and diagnostic accuracy for bony injuries. It provides excellent spatial resolution and multiplanar reformatted images that are critical for identifying fracture patterns, assessing displacement, and guiding surgical planning. It avoids the risks and potential delays associated with administering IV contrast when the primary question is about bone integrity.

My patient has an isolated nasal injury. Do they always need a CT scan?

Not necessarily. While CT is rated Usually appropriate for a suspected nasal injury, this is because it can detect associated, more complex facial fractures. If the clinical exam strongly suggests an isolated, simple, non-displaced nasal bone fracture, management is often clinical (ice, analgesia, and follow-up). In these cases, imaging may not change management. The ACR also lists ultrasound and radiographs as May be appropriate, reflecting that a less complex imaging approach can be considered when suspicion for wider injury is low.

Reviewed by Pouyan Golshani, MD, Interventional Radiologist — May 12, 2026