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Decreased venous contamination on 3D gadolinium-enhanced bolus chase peripheral mr angiography using thigh

Hong Lei Zhang1, Bernard Y Ho, Minh Chao

  • 1Cornell MRI, Weill Medical College of Cornell University, 416 E 55th St., New York, NY 10022, USA. hoz2005@med.cornell.edu <hoz2005@med.cornell.edu>

AJR. American Journal of Roentgenology
|September 24, 2004
PubMed
Abstract

Insights

Thigh compression using blood pressure cuffs improves peripheral MR angiography by slowing arterial flow and reducing venous contamination. This technique enhances image quality for better diagnostic accuracy in patients with fast arterial flow.

Area of Science:

  • Radiology
  • Medical Imaging
  • Vascular Imaging

Background:

  • Peripheral MR angiography is crucial for diagnosing vascular diseases.
  • Fast arterial flow can lead to venous contamination, degrading image quality.
  • Bolus chase techniques are sensitive to flow dynamics.

Purpose of the Study:

  • To evaluate the effectiveness of thigh compression in improving bolus chase peripheral MR angiography.
  • To assess the impact of thigh compression on arterial flow and venous contamination in patients with fast arterial flow.

Main Methods:

  • Bolus chase peripheral MR angiography was performed on 52 patients (32 with thigh compression, 36 without).
  • Thigh compression was applied using tourniquets or blood pressure cuffs inflated to 60 mm Hg.
  • Venous contamination and popliteal artery signal-to-noise ratio (SNR) were quantitatively assessed.

Main Results:

  • Thigh compression significantly slowed arterial travel time (p < 0.001).
  • Blood pressure cuffs reduced venous contamination scores in the calf (p < 0.05).
  • Thigh compression increased popliteal artery SNR (81 vs 52, p < 0.001).

Conclusions:

  • Thigh compression, particularly with blood pressure cuffs at 60 mm Hg, is an effective method to improve peripheral MR angiography.
  • The technique enhances image quality by reducing venous contamination and increasing arterial SNR.
  • This method is beneficial for patients with fast arterial flow, leading to more accurate diagnoses.

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