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26 Cards in this Set
- Front
- Back
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What are the 3 main liver conditions that MRI can be used to detect?
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1. Liver Malignancy
2. Hepatic Steatosis (fatty liver) 3. Hemachomatosis (Hepatic Iron Overload) |
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Wrt to the bile duct and pancreatic pathology, what 2 items can the MRI detect?
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1. Gallstones and common bile duct stones
2. Pancreatic ductal carcinoma |
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Wrt to cancer, what is the liver especially vulnerable to?
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Metastases
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What does CSF look like on a T1?
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Black
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What does CSF look like on a T2 MRI?
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White
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What type of liver lesions look the same color as CSF?
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Cysts
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Metastatic disease looks like what on an MRI?
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Looks similari to the SPLEEN
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Cysts and hemangiomas look like what on an MRI?
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CSF
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What signal intensity will the spleen have on a T1?
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Low (dark)
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What SI will metastases have on a T1?
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Low (dark)
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What SI will the liver have on a T1?
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high (light)
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What SI will fat have on a T1?
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Very high (light)
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What SI will the spleen have on a T2?
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High (very light)
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What SI will metastases have on a T2?
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High (light) (but not as high as cysts, will still look like the spleen)
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What SI will the liver have on a T2?
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Low (dark)
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What SI will fat have on a T2?
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high (bright)
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What is hepatic steatosis?
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Fatty liver
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What is NASH?
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Non alcoholic steato-Hepatitis
Steatosis + Inflammation |
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NASH is the #1 cause of what?
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Cryptogenic Cirrhosis
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In back to back, T1 weighted images of the liver, what will be seen in steatosis?
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The liver will appear darker (loss of SI) in the second image due to fat
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what is genetic hemochromatosis?
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Increased iron absorption from the gut
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Is genetic hemochromatosis easy to diagnose?
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No usually takes 5 doctors and waits 5 years before being diagnosed
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what symptoms are seen in genetic hemochromatosis?
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1. Abnormal liver tests
2. Diabetes 3. Heart failure 4. Arthritis 5. Impotence |
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What is seen on a T1 is genetic hemochromatosis?
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Low SI (dark) from liver
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Wrt to pancreatic cancer, what are the 2 main roles of the radiologist?
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1. Avoid "peek and shriek" (surgeon opens up only to find that it is unresectable)
2. Limit intervention to bypassing common duct or duodenal obstruction |
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What is the double duct sign of pancreatic cancer?
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Can't see where common bile duct and pancreatic duct fuse because tumor is in the way
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