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Magnetic Resonance Imaging Quantification of Pulmonary Perfusion using Calibrated Arterial Spin Labeling
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Response of arteriovenous malformations to gamma knife therapy evaluated with pulsed arterial spin-labeling MRI

Jeffrey M Pollock1, Christopher T Whitlow, Justin Simonds

  • 1Department of Radiology, Wake Forest University Medical Center, Winston-Salem, NC, USA. jeffmpollock@gmail.com

AJR. American Journal of Roentgenology
|December 24, 2010
PubMed
Abstract

Insights

Pulsed arterial spin-labeling (PASL) MRI can assess gamma knife treatment effects on arteriovenous malformation (AVM) blood flow. This technique quantifies AVM nidus perfusion and steal phenomena, aiding in monitoring treatment efficacy over time.

Area of Science:

  • Medical Imaging
  • Neurology
  • Radiology

Background:

  • Arteriovenous malformations (AVMs) are complex vascular abnormalities.
  • Gamma knife treatment is a common therapeutic approach for AVMs.
  • Evaluating treatment efficacy requires precise measurement of blood flow dynamics.

Purpose of the Study:

  • To assess the impact of gamma knife treatment on AVM blood flow using pulsed arterial spin-labeling (PASL) MRI.
  • To measure perfusion within the AVM nidus and adjacent vascular territories.
  • To evaluate the 'steal phenomenon' associated with AVMs.

Main Methods:

  • Pulsed arterial spin-labeling (PASL) Magnetic Resonance Imaging (MRI) was employed.
  • Perfusion measurements were taken in the AVM nidus and surrounding areas.
  • Quantitative analysis of blood flow rates was performed.

Main Results:

  • PASL MRI demonstrated the ability to visualize and quantify blood flow changes post-treatment.
  • The study successfully identified and measured the steal phenomenon.
  • Relative flow rates within the AVM nidus were quantifiable.

Conclusions:

  • PASL MRI is effective in evaluating AVM perfusion and the steal phenomenon.
  • This technique allows for quantitative assessment of blood flow dynamics.
  • PASL MRI can be utilized for longitudinal monitoring of AVMs to assess gamma knife treatment efficacy.

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