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Schematic view of different stages of cerebral venous thrombus on MRBTI. MRBTI showed an acute clot sign (ACS) in the superior sagittal sinus (arrowhead). Acute thrombus with deoxyhemoglobin and less fibrin (A) and subacute thrombus with methemoglobin and more fibrin in superior sagittal sinus were demonstrated as a subacute clot sign (SCS) (B).
