Neuro-radiology quiz for medical students.pptx

Neuro radiology Quiz

1. Neuro -radiology quiz

2. How do you read the CT brain Examine the brain for : Symmetry - make sure sulci and gyri appear the same on both sides. ... Grey-white differentiation - the earliest sign of a CVA on CT scan is the loss of the grey-white interface on CT scan. ... Shift - the falx should be in the midline with ventricles the same on both sides.

3. Hyper/ hypodenisty - blood, calcification and IV contrast are hyperdense (appear lighter) and air, fat and areas of tumor ischemia are hypodense (appear darker).

4. Ventricles Examine for IIIrd , IVth and lateral ventricles for dilation or compression/shift.

5. Blood Look for any evidence of bleeding throughout all slices of the head CT. Blood will appear bright white and is typically in the range of 50-100 Houndsfield units. Basic categories of blood in the brain are epidural, subdural, intraparenchymal / intracerebral , intraventricular , and subarachnoid. Epidural (lens shaped, does not cross suture lines)

6. Bone Bone has the highest density on CT scan (whitest in appearance.) Evaluate for fracture.

7. EDH is caused by 1. Venous haemorrhage 2. Middle meningeal artery haemorrhage 3. Thalostriae vessels

8. If tumour at aquedous The following are dilated, 1. Lateral ventricle 2. Third ventricle 3. Both 4. 4 th ventricle

9. Thalamus is supplied by 1. ACA 2. MCA 3. PCA

10. 1 st investigaion of choice in acute stroke 1. Skull X ray 2. CT angiogram 3. NECT head

11. Most common cause extra-axial tumour is 1. metastases 2. meningioma 3. Ependymoma 4. astrocytoma