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30 Cards in this Set
- Front
- Back
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percentage of causes of LBP found by imaging?
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20%
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most common cause of significant back pain?
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herniated disc
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potential site of herniation imaging findings?
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hyperintense T2 signal
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base of the disk wider than tip?
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protrusion
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usualy location of spinal stenosis?
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cervical and lumbar
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characteristic of congenital lumbar stenosis?
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shortened pedicles, and uniform throughout spine
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degenerative stenosis often found in which age group?
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over 50
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how is spinal stenosis pain deminished?
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pt. leans forward
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spondylosis sx.?
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none
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which spondy associated with spondylolysis?
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isthmic spondy
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how do you image stability in spondy?
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ext. and flex. views
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preferred method for evaluation of vert.?
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CT
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study of choice when MRI not possible?
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myelogram
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three locations for tumor?
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extradural, intradural, intramedullary
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most common extradural lesion?
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mets
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which extradural tumor often accompanied by intradrual component?
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neurofibroma
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meningioma (extramedullary) most common location?
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thoracic
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cervical intramedullary lesions most commonly?
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glioma or syrinx
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most common bacterial infection?
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staph infection
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CT/MRI finding for DAI?
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CT-subtle or absent; only 20% contain lesions
MRI-small multiple hyperintense foci on T2 |
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percentage of clinical "strokes" that are not on imaging?
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2%
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tumor margins in intra vs. extra axial?
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intra-axial neoplasm do not have distinct margins
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advantages of MRI vs. CT for neoplasm detection? (3)
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multiplanar capability, increased contrast resolution, and lack of radiation
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well circumscribes mass most likely indicate benign or malignant?
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benign
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most common intra-axial mets?
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lung, breast, skin, colon
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most common extra-axial mets?
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lung, breast, prostate, neuroblastoma
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Dx. of MS by imaging?
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should never be done
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imaging findings in MS?
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perpendicular plaque lesions surrounding the ventricles
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PET scan results in alzheimer's vs. dementia?
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reduced activity in temporoparietal areas for alzheimer's and scattered areas of diffuse perfusion for dementia
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only exception to finding a infection with MRI?
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CT is used for sinus infections
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