Magnetic resonance imaging (MRI) is the gold-standard imaging modality in human and veterinary medicine for intracranial lesions. Conventional MRI imaging allows for evaluation and interpretation of intracranial lesions based on inherent macroscopic properties of the lesion (location, signal intensity, contrast enhancement, edema, hemorrhage). Based on these findings, a presumptive diagnosis/prioritized differential list is made. In dogs, conventional MRI has demonstrated a high sensitivity for differentiating between the broad etiologic categories of intracranial disease but overlap of diagnostic imaging findings between the categories remain. Definitive diagnosis of intracranial lesions by histologic evaluation remains the referenced standard.
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