Isolated DWI restriction in acute ischemia — useful window?

Diffusion restriction appears in minutes to hours and persists for days to weeks. ADC pseudonormalizes around 7–10 days — always correlate with FLAIR (DWI/FLAIR mismatch can estimate window).

Multiple sclerosis — current criteria?

McDonald 2017 criteria: dissemination in space (lesions in ≥ 2 of 4 typical regions) and time (enhancing + non-enhancing lesions simultaneously, or new lesion on follow-up MRI).

When to order perfusion / spectroscopy?

For brain tumor characterization (glioma grading), differentiation of recurrence vs radionecrosis and suspected metabolic disease.

Report template — MRI of venous intracranial

When to use

Brain MRI is the most sensitive method for acute ischemia (DWI), demyelinating lesions (multiple sclerosis), epilepsy, dementia, tumors, CNS infections and vascular malformations. In emergencies, CT remains first-line due to speed; MRI completes the workup.

What to evaluate

Diffusion (DWI/ADC): acute restrictions and vascular distribution pattern.
FLAIR: white matter lesions, MS distribution pattern (McDonald criteria).
Post-gadolinium T1: focal enhancement, pattern (ring, solid, leptomeningeal).
Susceptibility-weighted (SWI/SWAN): microhemorrhages, deposits.
Deep structures, posterior fossa, sella, skull base.

Interactive template

Fill the blanks0/2

Técnica: Exame realizado pela técnica fast gradient echo com aquisição coronal e reconstrução tridimensional após a injeção endovenosa de contraste paramagnético em bolus. Foram ainda obtidas imagens pela técnica "2D-TOF". Análise: - Porção cranial das veias jugulares internas: calibre, trajeto e contrastação preservados. - Seios sagital superior, reto, transversos e sigmoides: calibre, trajeto e contrastação preservados. - Veia de Galeno e veias cerebrais internas: calibre, trajeto e contrastação preservados. - Circulação patológica: ausente. - Trombose venosa recente: ausente. - Variações anatômicas: assimetria do calibre entre as veias jugulares internas e os seios sigmoides e transversos, menores à . Comparação: Estudos anteriores não disponíveis para a análise. Conclusão: Angiorressonância magnética venosa cerebral dentro dos parâmetros da normalidade.

Template in Brazilian Portuguese (clinical reporting language). Adapt to your service protocol. Not medical advice — the physician reviews, edits and signs.

How to use

Replace each [...] with the exam's measurement or descriptor.
Adapt the conclusion to your service protocol before signing.
Use the template as a starting point — not a replacement for physician review.
In Laudos.AI, dictate findings in natural speech and the AI structures text in this format for review.

Frequently asked

Isolated DWI restriction in acute ischemia — useful window?: Diffusion restriction appears in minutes to hours and persists for days to weeks. ADC pseudonormalizes around 7–10 days — always correlate with FLAIR (DWI/FLAIR mismatch can estimate window).
Multiple sclerosis — current criteria?: McDonald 2017 criteria: dissemination in space (lesions in ≥ 2 of 4 typical regions) and time (enhancing + non-enhancing lesions simultaneously, or new lesion on follow-up MRI).
When to order perfusion / spectroscopy?: For brain tumor characterization (glioma grading), differentiation of recurrence vs radionecrosis and suspected metabolic disease.

References

Thompson AJ et al., Lancet Neurol 2018 (McDonald 2017).
Powers WJ et al., Stroke 2019.