Fast imaging strategies for mouse kidney perfusion measurement with pseudocontinuous arterial spin labeling (pCASL) at ultra high magnetic field (11.75 tesla). Issue 4 (24th February 2015)

• Record Type: Journal Article
• Authors: Prevost, Valentin H.; Girard, Olivier M.; Callot, Virginie; Cozzone, Patrick J.; Duhamel, Guillaume
• Is Part Of: Journal of magnetic resonance imaging. Volume 42:Issue 4(2015)
• Page Start: 999
• Page End: 1008
• Publication Date: 2015-02-24
• Subjects: Magnetic resonance imaging -- Periodicals; 616
• DOI: 10.1002/jmri.24874
• Languages: English
• ISSNs: 1053-1807

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="jmri24874-sec-0001" sec-type="section"> <title>Background</title> <p>To derive an adapted protocol at ultra high magnetic field for mouse kidney perfusion measurements using pCASL in combination with three widely available fast imaging readouts: segmented SE EPI (sSE EPI), RARE, and TrueFISP.</p> </sec> <sec id="jmri24874-sec-0002" sec-type="section"> <title>Methods</title> <p>pCASL sSE EPI, pCASL RARE, and pCASL TrueFISP were used for the acquisition of mouse kidney perfusion images in the axial and coronal planes at 11.75T. Results were compared in terms of perfusion sensitivity, signal‐to‐noise ratio (SNR), blood flow values, intrasession and intersession repeatability, and image quality (subjectively classified into three grades: good, satisfactory, and unacceptable).</p> </sec> <sec id="jmri24874-sec-0003" sec-type="section"> <title>Results</title> <p>Renal cortex perfusion measurements were performed within 2 min with pCASL RARE/pCASL TrueFISP and 4 min with pCASL sSE EPI. In an axial direction, SNR values of 6.6/5.6/2.8, perfusion sensitivity values of 16.1 ± 3.7/13.6 ± 2.4/13.4 ± 1.0 %, blood flow values of 679 ± 149/466 ± 111/572 ± 46 mL/100 g/min and in‐ROI variations values of 192/161/181 mL/100 g/min were obtained with pCASL sSE EPI/pCASL RARE/pCASL TrueFISP. Highest SNR per unit of time (1.8) and highest intra/intersession reliability (92.9% and 95.1%) were obtained with pCASL RARE, which additionally presented highly reproducible satisfactory image quality. In coronal plane, significantly lower SNR, perfusion sensitivity and perfusion values were obtained for all techniques compared with that in the axial plane (<italic>P</italic> < 0.05) due to magnetization saturation effects.</p> </sec> <sec id="jmri24874-sec-0004" sec-type="section"> <title>Conclusion</title> <p>pCASL RARE demonstrated more advantages for longitudinal preclinical kidney perfusion studies at ultra high magnetic field. J. Magn. Reson. Imaging 2015;42:999–1008.</p> </sec> </abstract>