Article Figures & Data
Figures
- Fig 1.
An example to demonstrate region of interest placement within the inferior aspect of the superior sagittal sinus.
- Fig 2.
Scatterplot of sinus attenuation as a function of HCT with an HU >70 discriminating almost all cases with thrombosis from those without.
- Fig 3.
Unenhanced CT of subjects A (HU 92, HCT46) and B (HU 86, HCT 36), both with documented superior sagittal sinus thromboses, compared with subjects C (HU 66, HCT 43) and D (HU 64, HCT 43), without thrombosis. Note that hemoconcentration may mimic the appearance of a sinus thrombosis.
- Fig 4.
H:H ratio distribution demonstrates very little overlap between values for subjects without and with thrombosis, with no overlap when the value is ≥2.0.
Tables
Attenuation and hemoconcentration parameters for 8 patients with MRV-confirmed acute venous sinus thromboses
Subject Age/Gender Thrombus Site Thrombus Age (days) at Time of CT HU (Mean = 77) HCT% H:H Ratio (Mean = 2.20) HGB 1 29/M SSS 3 92 46 2.0 15.9 2 26/F SSS 4 86 36.2 2.38 11.8 3 39/M SSS, torcula 7 83 44.6 1.86 15.4 4 53/F Straight, bilateral transverse, sigmoid, torcula, SSS 3 78 37.2 2.10 12.8 5 41/F Left transverse, sigmoid 3 74 32.6 2.27 11.3 6 41/M SSS, left transverse 1 76 33.3 2.28 11.1 7 50/F SSS, straight, left transverse 2 95 36.5 2.60 12.7 8 18/M SSS, straight, bilateral transverse 12 46 25.0 1.84 8.6 -
Note:—Age is defined as the estimated time interval between onset of symptoms from thrombosis and measuring attenuation of thrombosis on CT.
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