Pediatric MRI Brain — Dictation, Appropriateness, and Dose for Residents

1. The Call from Peds: New-Onset Seizure in a 4-Year-Old

It’s a busy afternoon on the neuro rotation. The pediatric ED calls about a 4-year-old with a first-time, unprovoked seizure. The CT head was negative, but the neurologist is concerned about an underlying structural cause and has ordered an MRI. Your attending, a pediatric neuroradiologist, is going to want a meticulous read. They’ll expect you to comment on myelination, look for subtle cortical malformations, and scrutinize the hippocampi for any sign of mesial temporal sclerosis.

This isn’t just about finding a big tumor; it’s about the subtle findings that can change a child’s life and treatment plan. Getting the report right means knowing the age-specific patterns and having a solid template to work from. When you’re juggling a long list, having reliable frameworks is key. (We built the residents free-reference hub with exactly these moments in mind.)

2. What a Pediatric Magnetic Resonance Imaging (MRI) Brain Covers and What Attendings Look For

A pediatric brain MRI is not a one-size-fits-all study. The protocol and the key search patterns change dramatically with age. In a neonate, you’re assessing for hypoxic-ischemic injury and the very beginnings of myelination. In a toddler, you’re looking for congenital anomalies and developmental delay. In a school-aged child, the focus shifts more towards tumors, epilepsy workups, and vascular issues.

Your attending expects a systematic evaluation that is tailored to the patient’s age and clinical question.

**Common Indications Your Attending Will See:**

• Pediatric headache with red flags
• Seizure / epilepsy workup
• Suspected brain tumor
• Macrocephaly or microcephaly workup
• Developmental delay
• Evaluation for neonatal hypoxic-ischemic encephalopathy (HIE)
• Trauma (when CT is inadequate or for follow-up)
• Suspected non-accidental trauma (NAT) workup
• Surveillance for phakomatoses (neurofibromatosis, tuberous sclerosis)

**Key Questions Your Report Must Answer:**

• Is myelination appropriate for the patient’s age?
• Are there any congenital anomalies (e.g., callosal agenesis, cortical malformation, Dandy-Walker malformation)?
• Is there evidence of a posterior fossa mass (medulloblastoma, ependymoma, pilocytic astrocytoma)?
• In an epilepsy workup, is there evidence of mesial temporal sclerosis or a focal cortical dysplasia?
• Are there findings suggestive of a phakomatosis (e.g., focal areas of signal intensity in NF1, cortical tubers in TS)?
• In a trauma or NAT workup, are there subdural hematomas of varying ages or parenchymal injury?

3. Radiology Report Template for Pediatric MRI Brain

This template provides a solid starting point. Modify it based on your institution’s protocol and the specific clinical indication. The key is to be systematic, especially when evaluating age-dependent findings like myelination.

Technique

Multiplanar, multisequence magnetic resonance imaging of the brain was performed on a [1.5T or 3T] scanner. The standard institutional protocol for pediatric brain imaging was utilized.

SEQUENCES: Sagittal T1, Axial T1, Axial T2, Axial T2 FLAIR, Axial DWI/ADC, Axial SWI, Coronal T2.

[IF CONTRAST] ADMINISTRATION: [X] mL of [contrast agent name] was administered intravenously. Pre- and post-contrast T1-weighted images were obtained in axial, coronal, and sagittal planes.

COMPARISON: [Date of prior study]

Findings

MYELINATION: The pattern of myelination appears [appropriate/delayed/abnormal] for the patient’s stated age of [age]. (T1 myelination should be near-complete by 12 months; T2 by 24 months).

VENTRICLES AND CISTERNS: The ventricular system is normal in size and configuration. The basal cisterns are patent. No evidence of hydrocephalus.

BRAIN PARENCHYMA:

Supratentorial: No evidence of mass, mass effect, or midline shift. The gray-white matter differentiation is preserved. No areas of abnormal signal intensity or restricted diffusion to suggest acute ischemia. The cortex demonstrates normal gyration and thickness.

Infratentorial: The brainstem and cerebellum are unremarkable. The cerebellar tonsils are in a normal position. The fourth ventricle is normal in size and position.

VASCULAR STRUCTURES: Major dural venous sinuses and intracranial arteries demonstrate normal flow voids. No evidence of vascular malformation.

EXTRACRANIAL STRUCTURES: The orbits, paranasal sinuses, and mastoid air cells are clear. The calvarium and scalp are unremarkable.

[IF POST-CONTRAST]: There is no abnormal parenchymal, leptomeningeal, or dural enhancement.

Impression

1. Normal MRI of the brain with myelination pattern appropriate for the patient’s stated age.
2. No acute intracranial process.

4. Free Template Sources from the Radiology Community

Building a personal library of templates is a rite of passage in residency. But you don’t have to start from scratch. Before you spend hours creating your own macros, know that two great free repositories exist, curated by the radiology community. They are excellent resources for finding standardized language and structures for a wide range of studies.

• 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, user-friendly site maintained by Australian radiologists with a wealth of practical, clean templates.

5. The Next-Level Move: Free-Form Dictation with AI-Powered Structuring

The challenge with templates isn’t just finding them; it’s using them efficiently under pressure. Tabbing through fields in a rigid template can break your concentration, especially when you have complex or multiple positive findings. The ideal workflow is to dictate your findings naturally, as if you were talking to a colleague, and have the report structure itself automatically.

This is where AI-powered dictation tools come in. Instead of clicking through a macro, you can simply dictate the positive findings in free form: “There is T2 and FLAIR hyperintensity with associated volume loss in the right hippocampus, consistent with mesial temporal sclerosis.” The software then parses this, places it in the correct section of the report, and structures the impression with the key diagnosis.

Tools like GigHz Precision AI are designed for this workflow. They integrate established frameworks from the ACR and other societies, ensuring your report is not only structured but also contains the necessary elements for standardized reporting. When applicable, they can also surface Clinical Decision Support (CDS) popups for things like LI-RADS or Bosniak scores, guiding you to the right classification without having to leave your dictation window. It helps streamline the reporting process so you can focus on the images.

When Should You Order a Pediatric MRI Brain? ACR Appropriateness Criteria

Deciding between CT and MRI in a pediatric patient involves balancing diagnostic yield with the need for speed and potential sedation. The American College of Radiology (ACR) provides evidence-based guidelines to help with these decisions.

For a child presenting with **acute ataxia**, the initial imaging choice depends on the history. If there is no history of recent trauma, MRI Brain is rated “Usually Appropriate.” However, if there is a history of recent trauma, both CT and MRI are considered “Usually Appropriate,” with CT often being faster in an emergent setting. For children with **recurrent, chronic progressive, or chronic nonprogressive ataxia**, MRI Brain is consistently rated “Usually Appropriate” for the initial workup.

In the case of **pediatric headache**, the ACR guidance is nuanced. For a child with a “secondary headache” (one with red flags like neurologic deficits, papilledema, or a significant change in headache pattern), MRI Brain is “Usually Appropriate.” This also applies to sudden severe “thunderclap” headaches, headaches attributed to infection, or those attributed to remote trauma. For a primary headache without red flags, imaging is often not needed.

For a child older than 6 months presenting with symptoms of an **acute stroke**, an emergent MRI/MRA of the head and neck is “Usually Appropriate” to identify ischemia and vascular occlusion.

These criteria are primarily for initial imaging. The choice of follow-up imaging depends on the findings of the first study and the clinical course.

Pediatric MRI Brain Imaging Protocol — Sequences, Contrast, and Key Parameters

A pediatric brain MRI protocol must be optimized for a child’s developing brain, with a major focus on assessing myelination. This often requires higher-resolution T2 imaging than in adults. Sedation is a significant consideration, and protocols may be adjusted for ultra-fast, motion-tolerant sequences if the child cannot remain still.

The table below outlines a typical protocol. Note the thinner slices for T2 imaging in infants, which is critical for evaluating myelination.

Common Protocol Pitfalls

• Sedation: Most children under age 6 require sedation or general anesthesia. This needs to be coordinated with the pediatric anesthesia team well in advance. In some cooperative older children, ultra-fast motion-tolerant sequences (like PROPELLER/BLADE) can sometimes avoid the need for sedation.
• Slice Thickness: For infants, using thinner slices (2-3 mm) on axial T2 imaging is crucial for accurately assessing the subtle progression of myelination. Standard 4-5 mm slices can obscure important details.
• Contrast in Infants: Gadolinium-based contrast agents should be avoided in children under 1 year of age unless absolutely essential for the clinical question (e.g., suspected tumor or infection). This is due to concerns about the developing kidneys and gadolinium deposition.

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

3+ months free for radiology residents and fellows

Look like a rockstar on your reports — dictate positive findings in free form, the AI generates a structured report using ACR + SIR templates with the appropriate clinical decision support firing automatically.

All we ask is feedback so we can keep improving the product for trainees.

To apply, just let us know these three things:

1. Your PGY year (e.g., PGY-2, PGY-4)
2. Your training type (radiology residency or specific fellowship — IR, body, MSK, neuro, peds, breast, nucs)
3. Your training program / hospital name
4. (Optional) Your institutional email

It’s that simple. No credit card, no long forms. Just reply to the application with the three items above and we’ll get you set up. You can apply for the residents free-access program here.

8. Frequently Asked Questions

Is GigHz Precision AI HIPAA-compliant?

Yes. The platform is designed for de-identified workflows by default. It operates on the anonymized text of your dictated report and does not require access to protected health information (PHI) or your PACS system.

Do I need my hospital’s IT department to set this up?

No. GigHz Precision AI is a browser-based tool. There is no software to install. It works on any computer, including the call-room PC or your personal laptop or iPad, without needing IT approval or integration.

Does this replace PowerScribe or other dictation systems?

No, it works alongside them. You dictate into your existing system as you normally would. You can then copy-paste your free-form dictation into the tool to get a structured report, which you can paste back into your PACS/RIS. It’s a supplementary tool for structuring and refinement, not a replacement for your core dictation software.

Can I use this on my phone or iPad?

Yes, the platform is fully responsive and works on mobile devices and tablets. This is particularly useful for reviewing or refining reports away from a dedicated workstation.

Can I customize the report templates?

Yes. While the system comes pre-loaded with templates based on ACR and other society guidelines, you can create, modify, and save your own templates to match your personal preferences or your institution’s specific formatting requirements.

What happens after my residency or fellowship ends?

We offer continuity pricing for graduating residents and fellows who want to continue using the platform in their practice. The goal of the free program is to support you during training, and we make it easy to continue if you find it valuable.

Free GigHz Tools That Pair With This Article

Three free tools that complement the material above:

• ACR Appropriateness Criteria Lookup — Type an indication or clinical scenario in plain language and get the imaging studies the ACR rates for it, with adult and pediatric radiation levels. Built directly from 297 ACR topics, 1,336 clinical variants, and 15,823 procedure ratings.
• GigHz Imaging Protocol Library — A searchable library of 131 imaging protocols with the physics specs surfaced and the matching ACR Appropriateness Criteria alongside. Plain-English narratives readable in 60 seconds, organized by modality.
• GigHz Radiation Dose Calculator — Pick the imaging studies a patient has had and see total dose in millisieverts (mSv) with comparisons to natural background radiation, transatlantic flights, and chest X-rays. Useful for shared decision-making.

Reviewed by Pouyan Golshani, MD, Interventional Radiologist — May 7, 2026