Subarachnoid hemorrhage MRI: Difference between revisions
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== MRI == | == MRI == | ||
MRI may indicated in patients with subarachnoid hemorrhage if no lesion were found on prior angiography. | MRI may indicated in all patients with subarachnoid hemorrhage if no lesion were found on prior angiography.<ref name="pmid9836761">{{cite journal| author=Wijdicks EF, Schievink WI, Miller GM| title=MR imaging in pretruncal nonaneurysmal subarachnoid hemorrhage: is it worthwhile? | journal=Stroke | year= 1998 | volume= 29 | issue= 12 | pages= 2514-6 | pmid=9836761 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=9836761 }} </ref><ref name="pmid8587690">{{cite journal| author=Tatter SB, Crowell RM, Ogilvy CS| title=Aneurysmal and microaneurysmal "angiogram-negative" subarachnoid hemorrhage. | journal=Neurosurgery | year= 1995 | volume= 37 | issue= 1 | pages= 48-55 | pmid=8587690 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=8587690 }} </ref><ref name="pmid9888768">{{cite journal| author=Rogg JM, Smeaton S, Doberstein C, Goldstein JH, Tung GA, Haas RA| title=Assessment of the value of MR imaging for examining patients with angiographically negative subarachnoid hemorrhage. | journal=AJR Am J Roentgenol | year= 1999 | volume= 172 | issue= 1 | pages= 201-6 | pmid=9888768 | doi=10.2214/ajr.172.1.9888768 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=9888768 }} </ref> | ||
*Brain and spinal cord [[vascular malformations]] | |||
MRI may be helpful in diagnosis of occult vascular lesions that can cause subarachnoid hemorrhage and may include:<ref name="pmid8587690">{{cite journal| author=Tatter SB, Crowell RM, Ogilvy CS| title=Aneurysmal and microaneurysmal "angiogram-negative" subarachnoid hemorrhage. | journal=Neurosurgery | year= 1995 | volume= 37 | issue= 1 | pages= 48-55 | pmid=8587690 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=8587690 }} </ref><ref name="pmid16415680">{{cite journal| author=Koch C| title=Spinal dural arteriovenous fistula. | journal=Curr Opin Neurol | year= 2006 | volume= 19 | issue= 1 | pages= 69-75 | pmid=16415680 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=16415680 }} </ref> | |||
*[[Tumors]] | |||
**[[Pituitary adenoma]] | |||
*[[Arterial dissection]] (arterial wall [[hematoma]]) | |||
Disadvantage of performing MRI in patients with subarachnoid hemorrhage may include: | Disadvantage of performing MRI in patients with subarachnoid hemorrhage may include: | ||
*Higher cost | *Higher cost | ||
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*Not being sensitive for detection of subarachnoid hemorrhage within the first 48 hours | *Not being sensitive for detection of subarachnoid hemorrhage within the first 48 hours | ||
T2- and T2*-weighted images can potentially demonstrate SAH as low signal intensity in normally high-signal subarachnoid spaces. On T1-weighted images, acute SAH may appear as intermediate- or high-intensity signal in the subarachnoid space | T2- and T2*-weighted images can potentially demonstrate SAH as low signal intensity in normally high-signal subarachnoid spaces. On T1-weighted images, acute SAH may appear as intermediate- or high-intensity signal in the subarachnoid space | ||
==References== | ==References== | ||
Revision as of 13:16, 13 December 2016
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Subarachnoid Hemorrhage Microchapters |
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Diagnosis |
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Treatment |
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AHA/ASA Guidelines for the Management of Aneurysmal Subarachnoid Hemorrhage (2012)
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Case Studies |
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Subarachnoid hemorrhage MRI On the Web |
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American Roentgen Ray Society Images of Subarachnoid hemorrhage MRI |
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Risk calculators and risk factors for Subarachnoid hemorrhage MRI |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]; Sara Mehrsefat, M.D. [3]
Overview
MRI
MRI may indicated in all patients with subarachnoid hemorrhage if no lesion were found on prior angiography.[1][2][3]
- Brain and spinal cord vascular malformations
MRI may be helpful in diagnosis of occult vascular lesions that can cause subarachnoid hemorrhage and may include:[2][4]
- Tumors
- Arterial dissection (arterial wall hematoma)
Disadvantage of performing MRI in patients with subarachnoid hemorrhage may include:
- Higher cost
- Lower availability
- Longer study time make it less optimal for detecting SAH. In addition
- Not being sensitive for detection of subarachnoid hemorrhage within the first 48 hours
T2- and T2*-weighted images can potentially demonstrate SAH as low signal intensity in normally high-signal subarachnoid spaces. On T1-weighted images, acute SAH may appear as intermediate- or high-intensity signal in the subarachnoid space
References
- ↑ Wijdicks EF, Schievink WI, Miller GM (1998). "MR imaging in pretruncal nonaneurysmal subarachnoid hemorrhage: is it worthwhile?". Stroke. 29 (12): 2514–6. PMID 9836761.
- ↑ 2.0 2.1 Tatter SB, Crowell RM, Ogilvy CS (1995). "Aneurysmal and microaneurysmal "angiogram-negative" subarachnoid hemorrhage". Neurosurgery. 37 (1): 48–55. PMID 8587690.
- ↑ Rogg JM, Smeaton S, Doberstein C, Goldstein JH, Tung GA, Haas RA (1999). "Assessment of the value of MR imaging for examining patients with angiographically negative subarachnoid hemorrhage". AJR Am J Roentgenol. 172 (1): 201–6. doi:10.2214/ajr.172.1.9888768. PMID 9888768.
- ↑ Koch C (2006). "Spinal dural arteriovenous fistula". Curr Opin Neurol. 19 (1): 69–75. PMID 16415680.