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Related Concept Videos

Liver Histology01:27

Liver Histology

553
The microscopic anatomy of the liver is a complex and intricate system that comprises numerous structural units known as liver lobules, each of which is comparable in size to a sesame seed. These hexagonal structures consist of plates of liver cells or hepatocytes, which are characterized by their versatility and abundance of cellular apparatus like rough and smooth ER, Golgi apparatus, peroxisomes, and mitochondria.
Hepatocytes perform a variety of essential functions. They secrete...
553

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Hypointense Findings on Hepatobiliary Phase MR Images.

Kelly C Harper1, Maxime Ronot1, Michael L Wells1

  • 1From the Department of Radiology, Division of Abdominal Imaging, Mayo Clinic, 200 1st Street SW, Rochester, MN 55905 (K.C.H., M.L.W., C.L.W., J.F., S.K.V.); Department of Medical Imaging, University of Ottawa, Ottawa, Ontario, Canada (K.C.H.); Department of Medical Imaging, Beaujon University Hospital, Clichy, France (M.R.); HT Medica, Madrid, Spain (A.L.); Department of Radiology, University of Vienna, Vienna, Austria (A.B.S.); Department of Radiology, Sun Yat Sen University, Guangzhou, China (J.W.); and Department of Radiology, Division of Abdominal Imaging, Mayo Clinic, Scottsdale, Ariz (A.C.S.).

Radiographics : a Review Publication of the Radiological Society of North America, Inc
|January 30, 2025
PubMed
Summary
This summary is machine-generated.

Hepatobiliary (HB) MRI contrast agents offer insights into liver function and biliary anatomy. Understanding HB phase hypointensity is crucial for diagnosing liver diseases and assessing tumor aggressiveness.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Hepatobiliary MRI

Background:

  • Hepatobiliary (HB) contrast agents are vital MRI tools for liver assessment.
  • Their uptake by hepatocytes and excretion via bile create a distinct HB phase.
  • This phase provides critical information on liver function and biliary anatomy.

Purpose of the Study:

  • To elucidate the diagnostic value of HB contrast agents in various hepatobiliary diseases.
  • To provide insights into understanding and troubleshooting HB phase hypointensity.
  • To aid radiologists in accurate diagnosis of liver abnormalities using HB-MRI.

Main Methods:

  • Review of HB contrast agent pharmacodynamics and clinical applications.
  • Categorization of HB phase hypointensity into diffuse, regional, and focal patterns.
  • Correlation of hypointensity patterns with underlying hepatic, biliary, or vascular causes.

Main Results:

  • HB contrast agents aid in diagnosing diffuse liver disease, focal lesions, and biliary tree anatomy.
  • HB phase hypointensity can stem from diverse parenchymal, biliary, or vascular abnormalities.
  • Suboptimal hypointensity is significant in evaluating focal lesions, cirrhosis, and hepatocellular carcinoma.

Conclusions:

  • Accurate interpretation of HB phase hypointensity is essential for diagnosing liver conditions.
  • Hypointensity can indicate malignancy aggressiveness and impact prognosis.
  • Integrating HB-MRI findings with clinical context and other sequences minimizes diagnostic errors.