CT Scan Proff.Sumit Kr Ghosh Dept of Internal Medicine Medical College 88 College Street Kolkata
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CT SCAN (BRAIN) Dr. Sumit Kr. Ghosh Asst. Professor Department of Medicine Medical College & Hospital, Kolkata
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CT Scan Proff.Sumit Kr Ghosh Dept of Internal Medicine Medical College 88 College Street Kolkata
Transcript of CT Scan Proff.Sumit Kr Ghosh Dept of Internal Medicine Medical College 88 College Street Kolkata
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CT SCAN(BRAIN)
Dr. Sumit Kr. GhoshAsst. Professor
Department of MedicineMedical College & Hospital, Kolkata
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COMPUTED TOMOGRAPHY
Godfrey Hounsfield
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Hounsfield unit / number
-1000Black Air
+ 1000WhiteBone
0
Water
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HYPODENSE ISODENSE HYPERDENSE
Black White
1. Air (air sinuses)
Brain parenchyma 1. Bone
2. CSF (ventricles/ sulci/cisterns)
2. Calcification ( Choroid plexus, pineal gland, basal ganglia, granuloma , tumour)
3. Fat (retro-orbital) 3. Heomarrhage
4. Infarct 4. Blood vessels
5. Edema 5. Ring –enhancing lesion
Hypo/hyper -intensityHypo/hyper-echoic
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Conventional : thik slice : 7-10 mmHRCT : thinner slice : 1-2 mm
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