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Abstract #0969

Imaging of the Choroid Plexus Using Perfusion MR Imaging: Is It Possible?

Olivier Baledent1, Bader Chaarani1, Olivier Pottie1, Catherine Gondry-Jouet2, Jadwiga Zmudka3, Jean-Marie Serot3, Roger Bouzerar1

1Image Processing Unit, University Hospital, Amiens, France; 2Radiology, University Hospital, Amiens, France; 3Geriatric Unit, University Hospital, Amiens, France

The cerebrospinal fluid is produced in the highly vascularized choroid plexus (CP). Our goal is to evaluate dynamic T2*-weighted perfusion MR imaging for assessment of CP functionality. Gradient-echo EPI sequences were performed in 15 patients after bolus injection of gadolinium-based contrast agent. The MR signal modeled in terms of the combined T1- and T2-effects allowed the extraction of a capillary permeability parameter K2. Mean volume of CP was 2124 mm3 and mean permeability factor was 0.033 s-1. K2 significantly decreased with subject's age whereas mean transit time significantly increased. Clinical applications such as neurodegenerative diseases could be considered.