9. Brain Trauma: How old is the blood?

Question 1

Blood on CT

Hypodense

Answer 1

Hyperacute (< 1 hour)

Question 2

Blood on CT

Hyperdense

Answer 2

Acute (1hour - 3days)

Question 3

Blood on CT

progressively less dense

ISODENSE to brain

Peripheral rim enhancement on contrast

Answer 3

Subacute (4 days - 3 weeks)

Question 4

Blood on CT

Hypodense

Answer 4

Chronic (> 3 weeks)

Question 5

This is an ominous sign of active
bleeding

Answer 5

Swirl Sign

Hyperacute central blood (hypodense) with surrounding acute clotted blood.

Question 6

T1 Iso
T2 Bright

Answer 6

Hyperacute (< 24 hours)

Question 7

Osyhemoglobin
Inracellular

Answer 7

Hyperacute (< 24 hours)

Question 8

T1 Iso
T2 Dark

Answer 8

Acute (1-3 days)

Question 9

Deoxyhemoglobin
Intracellular

Answer 9

Acute (1-3 days)

Question 10

T1 Bright
T2 Dark

Answer 10

Ealry Subacute >3 days)

Question 11

Methemoglobin
Intracellular

Answer 11

Early Subacute (>3 days)

Question 12

T1 Bright
T2 Bright

Answer 12

Late Subacute ( > 7 days)

Question 13

Methemoglobin
Extracellular

Answer 13

Late Subacute (> 7 days)

Question 14

T1/T2 Dark peripherally
T2 brigth center

Answer 14

Chronic (> 14 days)

Question 15

Ferritin and Hemosiderin
Extracellular

Answer 15

Chronic (> 14 days)