Four-dimensional transcatheter intraarterial perfusion (TRIP)-MRI for monitoring liver tumor embolization in VX2 rabbits

Dingxin Wang, Sumeet Virmani, Richard Tang, Barbara Szolc-Kowalska, Gayle Woloschak, Reed A. Omary, Andrew C. Larson

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Transcatheter intraarterial perfusion (TRIP)-MRI is an intraprocedural technique to iteratively monitor liver tumor perfusion changes during transcatheter arterial embolization (TAE) and chemoembolization (TACE). However, previous TRIP-MRI approaches using two-dimensional (2D) T1-weighted saturation-recovery gradient-recalled echo (GRE) sequences provided only limited spatial coverage and limited capacity for accurate perfusion quantification. In this preclinical study, a quantitative 4D TRIP-MRI technique (serial iterative 3D volumetric perfusion imaging) with rigorous radiofrequency (RF) B1 field calibration and dynamic tissue longitudinal relaxation rate R1 measurement is presented for monitoring intraprocedural liver tumor perfusion during TAE. 4D TRIP-MRI and TAE were performed in five rabbits with eight VX2 liver tumors (N = 8). After B1 calibrated baseline and dynamic R 1 quantification, subsequent tissue contrast agent concentration time curves were derived. A single-input flow-limited pharmacokinetic model and peak gradient method were applied for perfusion analysis. The perfusion Fρ reduced significantly from pre-TAE 0.477 (95% confidence interval [CI]: 0.384-0.570) to post-TAE 0.131 (95% CI: 0.080-0.183 ml/min/ml, P < 0.001).

Original languageEnglish (US)
Pages (from-to)970-975
Number of pages6
JournalMagnetic resonance in medicine
Volume60
Issue number4
DOIs
StatePublished - Oct 2008

Keywords

  • Intraarterial
  • Iterative perfusion
  • Liver tumor
  • TAE
  • Transcatheter

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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