The document discusses indications for CT brain scans, including acute stroke, head injury, suspected hydrocephalus, and mental status changes. It describes how CT scans use Hounsfield units to represent radiodensity in images and how window width and level settings can be adjusted. Certain tissues appear hyperdense or hypodense on CT scans, such as blood appearing bright while CSF appears dark. The document outlines sections of the brain visible on CT and different windows used. It identifies cisterns, sulci, and fissures seen on scans and provides examples of normal brain calcifications.

1. DR. TEJASWINI MANE-PATIL

2. INDICATIONS FOR CT BRAIN
Acute stroke
Transient ischemic attack
Acute headache with focal neurological signs
Acute head injury
Suspected hydrocephalous
Mental status change
Secondary indications when MRI not available
including diplopia, cranial nerve problem, seizure,
syncope etc.

3. CT BRAIN AQUISITION

4. HOUNSFIELD UNIT
-HU is quantity commonly used in CT scan to express CT numbers in a
standardised and convenient form
-It repesents radiodensity at each point in given image.

5. WINDOW WIDTH AND LEVEL

6. DENSITY
HYPERDENSE OR
BRIGHT ON CT
HYPODENSE OR
DARK ON CT
 BLOOD
 BONE
 CALCIUM
 CONTRAST
 METAL
AIR
CSF /WATER
INFARCT
CEREBRAL OEDEMA

7. SECTIONS OF BRAIN

8. WINDOWS IN CT BRAIN

9. • CISTERNS- A cistern is any opening in sub
arachnoid space of brain created by
separation of arachnoid and pia matter. These
spaces are filled with CSF.
• SULCUS – A sulcus is a depression in cerebral
cortex.
• FISSURE- A fissure is large furrow that divides
brain into lobes and hemispheres.

10. CT BRAIN SOFT TISSUE WINDOW

11. CT BRAIN SOFT TISSUE WINDOW

12. CT BRAIN SAGITAL VIEW

13. CT BRAIN CORONAL VIEW

14. CEREBELLUM

15. CEREBELLUM

16. BONES AND SUTURES OF SKULL

17. CT BRAIN BONE WINDOW

18. CT BRAIN BONE WINDOW

19. CT BRAIN BONE WINDOW

20. SKULL BONES ON CT

21. SKULL BONES ON CT

22. VENTRICULAR SYSTEM OF BRAIN

23. VENTRICULAR SYSTEM OF BRAIN

24. NORMAL CALCIFICATIONS IN BRAIN
 Pineal gland
 Habenula (Anterior to pineal gland)
 Choroid plexus
 Basal ganglia calcification
 Falx , dura matter, tentorium cerebelli occasionly
 Superior sagital sinus

25. CHOROID PLEXUS AND
PINEAL GLAND CALCIFICATION
CALCIFICATION OF FALX
CEREBRI

26. THANK YOU