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CT during arterial portography

P Soyer1

  • 1Department of Radiology, Hôpital Foch, Suresnes, France.

European Radiology
|January 1, 1996
PubMed
Summary
This summary is machine-generated.

Computed tomography during arterial portography (CTAP) accurately localizes liver tumors and assesses their relationship with vessels. This invasive imaging is reserved for resectable tumors, aiding surgical planning.

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Area of Science:

  • Radiology
  • Hepatobiliary Imaging
  • Oncologic Imaging

Background:

  • Computed tomography during arterial portography (CTAP) utilizes contrast infusion via mesenteric or splenic arteries for liver enhancement.
  • This technique offers superior visualization of the portal vein and intrahepatic vasculature.

Purpose of the Study:

  • To evaluate the role of CTAP in precise tumor localization and assessment of tumor-vessel relationships in the liver.
  • To determine the utility of CTAP in preoperative planning for liver resections.

Main Methods:

  • CTAP involves arterial infusion of contrast material for enhanced portal and hepatic vessel visualization.
  • The technique is primarily indicated for patients with suspected resectable hepatic tumors, including colorectal metastases and other primary or secondary liver tumors.

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  • Correlation with other imaging modalities (sonography, CT, MRI) aids in characterizing perfusion defects.

    • Main Results:

    • CTAP provides reliable segmental tumor localization and accurate assessment of tumor-vascular relationships.
    • It is the most sensitive technique for detecting intrahepatic tumors.
    • Spiral CT technology enhances CTAP performance, and multiplanar/3D reconstructions aid surgical planning.

    Conclusions:

    • CTAP is a valuable, albeit invasive, tool for preoperative assessment of liver tumors, particularly in cases of colorectal metastases.
    • The technique facilitates accurate surgical planning, including determining resection extent and remnant liver volume.
    • While non-tumorous perfusion defects can be a limitation, they are well-characterized and manageable with correlative imaging.