1. Interpretation of CT Brain- neuro surgical prospective
Dr A Gazdar
04/09/2013

2. CT Sliced angled images of brain from skull base to vertex.
Either cross sectional (axial) / coronal / sagittal images
Radiocontrast used is iodinated : !!!allergy

3. Normal anatomy A. Frontal Lobe
B. Frontal Bone (Superior Surface of Orbital Part)
C. Dorsum Sellae
D. Basilar Artery
E. Temporal Lobe
F. Mastoid Air Cells
G. Cerebellar Hemisphere

4. A. Frontal Lobe
B. Sylvian Fissure
C. Temporal Lobe
D. Suprasellar Cistern
E. Midbrain
F. Fourth Ventricle
G. Cerebellar Hemisphere

5. A. Falx Cerebri
B. Frontal Lobe
C. Anterior Horn of Lateral Ventricle
D. Third Ventricle
E. Quadrigeminal Plate Cistern
F. Cerebellum

6. A. Anterior Horn of the Lateral Ventricle
B. Caudate Nucleus
C. Anterior Limb of the Internal Capsule
D. Putamen and Globus Pallidus
E. Posterior Limb of the Internal Capsule
F. Third Ventricle
G. Quadrigeminal Plate Cistern
H. Cerebellar Vermis
I. Occipital Lobe

7. A. Genu of the Corpus Callosum
B. Anterior Horn of the Lateral Ventricle
C. Internal Capsule
D. Thalamus
E. Pineal Gland
F. Choroid Plexus
G. Straight Sinus

8. A. Falx Cerebri
B. Frontal Lobe
C. Body of the Lateral Ventricle
D. Splenium of the Corpus Callosum
E. Parietal Lobe
F. Occipital Lobe
G. Superior Sagittal Sinus

9. A. Falx Cerebri
B. Sulcus
C. Gyrus
D. Superior Sagittal Sinus

10. Trauma Both brain and bone windows need to be examined
Fractures are noted in sinuses, skull base, mastoid bone, temporal (petrous), skull.
Either linear or depressed.
Either displaced or undisplaced

11. SAH Most commonly associated with vascular anomalies Aneurysm, AVM
CT grading is Fischer grade

12. Acute SDH NSx emergency Crescent shaped
Hyperdense, may contain hypodense foci due to serum, CSF or active bleeding
Does not cross dural reflections

13. EDH Associated with skull fractures Hyerdense biconvex
Can cross the dural borders

14. contusions ill-defined hypodense area mixed with foci of hemorrhage.
Adjacent subarachnoid hemorrhage is common.
>24-48 hours, hemorrhagic transformation or coalescence of petechial hemorrhages : evolution

15. tumors Contrast needed to delineate
Multiple at grey white junction– mets
Dural based – meningioma
Diffuse intraparenchymal – high grade gliomas

16. hydrocephalous Communicating or obstructive Trapped horns
Look for cause
Associated hardware

17. Intracranial infections
Abscess – extra or intra cranial
Extra : look for sinusitis, thrombophlebitis, postop
Intra: look for distant source

18. Nerve wreck…..
Describe the lesion…

19. Fischer grade for SAH in image

20. Please describe the pathology..

21. Thank you..
Have a great day!!