Cerebral venous sinus thrombosis CT: Difference between revisions
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[[Cerebral oedema]] and venous infarction may be apparent. | [[Cerebral oedema]] and venous infarction may be apparent. | ||
===CT venography=== | ===CT venography=== | ||
For the detection of the thrombus itself, the most commonly used tests are [[computed tomography]] (CT) and [[magnetic resonance imaging]] (MRI), both using various types of[[radiocontrast]] to perform a [[venogram]].Computed tomography, with radiocontrast in the venous phase (CT venography or CTV), has a detection rate that in some regards exceeds that of MRI. The test involves injection into a vein (usually in the arm) of a radioopaque substance, and time is allowed for the bloodstream to carry it to the cerebral veins - at which point the scan is performed. It has a sensitivity of 75-100% (it detects 75-100% of all clots present), and a specificity of 81-100% (it would be incorrectly positive in 0-19%). In the first two weeks, the "empty delta sign" may be observed (in later stages, this sign may disappear).[1] | For the detection of the thrombus itself, the most commonly used tests are [[computed tomography]] (CT) and [[magnetic resonance imaging]] (MRI), both using various types of [[radiocontrast]] to perform a [[venogram]].Computed tomography, with radiocontrast in the venous phase (CT venography or CTV), has a detection rate that in some regards exceeds that of MRI. The test involves injection into a vein (usually in the arm) of a radioopaque substance, and time is allowed for the bloodstream to carry it to the cerebral veins - at which point the scan is performed. It has a sensitivity of 75-100% (it detects 75-100% of all clots present), and a specificity of 81-100% (it would be incorrectly positive in 0-19%). In the first two weeks, the "empty delta sign" may be observed (in later stages, this sign may disappear).[1] | ||
===[[Cerebral angiography]]=== | ===[[Cerebral angiography]]=== | ||
It may demonstrate smaller clots, and obstructed veins may give the "corkscrew appearance". | It may demonstrate smaller clots, and obstructed veins may give the "corkscrew appearance". | ||
==References== | ==References== | ||
{{Reflist|2}} | {{Reflist|2}} | ||
Revision as of 15:24, 25 July 2012
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Cerebral venous sinus thrombosis Microchapters |
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Differentiating Cerebral venous sinus thrombosis from other Diseases |
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Diagnosis |
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Treatment |
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Case Studies |
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Cerebral venous sinus thrombosis CT On the Web |
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American Roentgen Ray Society Images of Cerebral venous sinus thrombosis CT |
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Directions to Hospitals Treating Cerebral venous sinus thrombosis |
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Risk calculators and risk factors for Cerebral venous sinus thrombosis CT |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: : Kalsang Dolma, M.B.B.S.[2]
CT
Cerebral oedema and venous infarction may be apparent.
CT venography
For the detection of the thrombus itself, the most commonly used tests are computed tomography (CT) and magnetic resonance imaging (MRI), both using various types of radiocontrast to perform a venogram.Computed tomography, with radiocontrast in the venous phase (CT venography or CTV), has a detection rate that in some regards exceeds that of MRI. The test involves injection into a vein (usually in the arm) of a radioopaque substance, and time is allowed for the bloodstream to carry it to the cerebral veins - at which point the scan is performed. It has a sensitivity of 75-100% (it detects 75-100% of all clots present), and a specificity of 81-100% (it would be incorrectly positive in 0-19%). In the first two weeks, the "empty delta sign" may be observed (in later stages, this sign may disappear).[1]
Cerebral angiography
It may demonstrate smaller clots, and obstructed veins may give the "corkscrew appearance".