Head MR and classic cases

43.1 Sagittal brain MRI : T1 (left) and T2 (right)




There are multiple bilateral foci of high signal (arrow) present within the white matter (appears dark on T2). These lesions lie immediately above and to the side of the lateral ventricles. The periventricular white matter is a typical location for multiple sclerosis lesions


The DWI shows bright signal (arrowheads) in the distribution of the left posterior cerebral artery. The ADC image shows this area as low signal and therefore it is not due to T2 signal (note the bright ventricles). This is evidence of restricted diffusion which is a sign of infarction. DWI is the most sensitive investigation for acute cerebral infarction


This patient presented with headaches and visual field disturbance (bitemporal hemianopia). The pre-contrast image (left) shows a pituitary adenoma (arrowhead) which demonstrates abnormal enhancement on the post-contrast scan (right). This is classified as a macroadenoma (>1 cm). The bigger a pituitary lesion becomes the more likely it is to cause visual disturbance due to compression of the optic chiasm which lies immediately above the pituitary gland


1 Corpus callosum

2 Midbrain

3 Pons

4 Medulla oblongata

5 Cerebellum

6 Spinal cord

7 Cerebrum

8 Pituitary gland

9 Fourth ventricle

10 Caudate nucleus

11 Lentiform nucleus

12 Internal capsule

13 Lateral ventricle

14 Eyes

15 Ethmoid air cells

16 Sphenoid sinus

17 Internal auditory meatus

18 Cochlea

19 Skull

Stay updated, free articles. Join our Telegram channel

Mar 7, 2016 | Posted by in GENERAL RADIOLOGY | Comments Off on Head MR and classic cases

Full access? Get Clinical Tree

Get Clinical Tree app for offline access