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25 Cards in this Set
- Front
- Back
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Use MRI to image what tissues?
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Soft tissues
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T1 weighted MRI is good for...?
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viewing anatomy
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T1 weighted MRI images are good for observing...?
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pathology
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T1 MRI - what is bright/white?
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(faT1)
Fat-containing tissues |
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T2 MRI - what is bright/white?
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(T h2O)
Water-containing tissue |
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MRI has superior ______ resolution compared to Xray.
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Contrast Resolution
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Xray has superior ______ resolution compared to MRI.
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Spatial Resolution
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What is spatial resolution?
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Ability to seperately distinguish between two structures only a small distance apart.
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What is contrast resolution?
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Ability to distinguish differences between similar tissues.
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In a T2-weighted MRI scan, what colour would fat show up as?
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dark
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In a T2 weighted image, how would water/fluid-containing structures show up?
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white
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In a T1 weighted MRI image, how would fatty structures show up?
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white
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In a T1 weighted MRI image, how would water/fluid containing structures show up?
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dark
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Why is T2 weighted MRI good for showing up pathology?
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Damaged tissue tends to develop oedema, which is water-containing and shows up bright on T2 MRIs.
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What is CT?
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CT images are multiple Xray images.
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Is MRI best suited for imaging calficifed or non-calcified tissues?
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Non-calcified tissues.
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What would you use to image suspected osteomyelitis?
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MRI
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What is CT best suited to imaging, in rheumatology?
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Bone cortex
Bone erosions Periosteal reactions |
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In ultrasound, what is an anechoic tissue?
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a tissue that reflects no sound wave and produces no U/S image
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In ultrasound, what is echogenic tissue?
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Tissue that reflects ultrasound waves and produces an image.
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What pathology is Ultrasound used to detect a lot in podiatry?
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Morton's Neuromas
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MRI contraindicated for patients who have...?
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Cardiac pacemakers or implanted electromagnetic devices or
aneurysmal clips |
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How does fluid show up on ultrasound?
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It doesn't. Fluid is anechoic.
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Is bone echogenic or anechoic?
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Highly echogenic
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Ultrasound can detect what three things?
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1. Morton's Neuromas
2. Soft tissue trauma 3. Torn tendons |
