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Abstract #4615

The effect of AIF and tissue time-course temporal alignment on pharmacokinetic model trans-cytolemmal water exchange sensitivity

Xin Li1, Wei Huang1, William D. Rooney1, and Charles S Springer1
1Advanced Imaging Research Center, Oregon Health & Science University, Portland, OR, United States

Synopsis

Keywords: Data Analysis, DSC & DCE PerfusionUsing DCE modeling to quantify prostate transcytolemmal water exchange effect faces the challenges of often insufficient interstitial contrast agent concentration as well as suboptimal temporal resolution. Using ultra-high temporal resolution prostate DCE data, the goal of this work is to investigate the impact of DCE-MRI temporal alignment between the arterial input function (AIF) and the tissue time-courses on water exchange quantification. Results here show that when perfect alignment is not achievable in practice, an earlier AIF bolus arrival bias will generally reduce the capability for water-exchange quantification using DCE-MRI.

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