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Dynamic Contrast Enhanced Magnetic Resonance Imaging of an Orthotopic Pancreatic Cancer Mouse Model
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Combined dynamic contrast-enhanced liver MRI and MRA using interleaved variable density sampling.

Mahdi Salmani Rahimi1, Frank R Korosec, Kang Wang

  • 1Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, Wisconsin, USA.

Magnetic Resonance in Medicine
|March 19, 2014
PubMed
Summary
This summary is machine-generated.

This study presents a novel liver MRI method combining dynamic imaging and angiography with a single contrast injection. The interleaved variable density (IVD) technique achieves high resolution, improving lesion visualization and diagnostic accuracy.

Keywords:
DCE liver perfusionIVDLiver MRAT1 weighted liver

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Area of Science:

  • Radiology
  • Medical Imaging
  • Magnetic Resonance Imaging

Background:

  • Liver MRI requires high spatial and temporal resolution for accurate diagnosis.
  • Simultaneous dynamic imaging and MR angiography (MRA) often necessitate multiple contrast injections.
  • Developing a single-injection method enhances efficiency and patient comfort.

Purpose of the Study:

  • To develop and validate a volumetric contrast-enhanced MRI technique for the liver.
  • To achieve high spatial and temporal resolutions for combined dynamic imaging and MRA.
  • To enable both imaging types with a single contrast agent injection.

Main Methods:

  • Implemented an interleaved variable density (IVD) undersampling pattern.
  • Utilized a real-time-triggered, time-resolved, dual-echo 3D spoiled gradient echo sequence.
  • Acquired parallel imaging autocalibration lines once; imaging performed in 10 subjects with FNH.

Main Results:

  • Successfully visualized 21 FNH, 3 hemangiomas, and 109 arterial segments.
  • Demonstrated a 4-second update rate for characteristic lesion enhancement patterns.
  • Achieved noninferior diagnostic assessment for MRA compared to dedicated scans.

Conclusions:

  • Feasibility of high-resolution dynamic contrast-enhanced imaging and simultaneous MRA of the liver demonstrated.
  • The undersampled IVD imaging method enables efficient, single-injection liver MRI.
  • This technique offers improved quality and diagnostic capability over conventional clinical MRI.