Computed Tomography
- Computed tomography offers a widely available, quick and inexpensive imaging modality.
- It is typically performed in acute situations in which haemorrhage is suspected or for the rapid diagnosis of a space occupying lesion.
- The main disadvantage is the use of ionising radiation. CT is also inferior to MRI for assessment of the posterior cranial fossa, white matter and sellar lesions.
- There are few studies which have directly compared the sensitivity of CT and MRI for the investigation of paediatric headache. In one study there was no significant difference between the two for the detection of surgical space occupying lesions. 5
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