Fig. 2: Representative hyperpolarized [13C,15N2]urea images from a healthy brain volunteer.
From: Translation of hyperpolarized [13C,15N2]urea MRI for novel human brain perfusion studies
![Fig. 2: Representative hyperpolarized [13C,15N2]urea images from a healthy brain volunteer.](http://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs44303-025-00073-3/MediaObjects/44303_2025_73_Fig2_HTML.png?as=webp)
a Corresponding 1H anatomical images and the dynamic HP [13C,15N2]urea images (7.76 × 7.76 × 15 mm3) overlaid on the 1H anatomical images are displayed. A total of 20 slices and 32 timeframes were acquired, and this figure displays the middle 6 slices and the first 16 timeframes (1.5 s temporal resolution). White arrows indicate the signal from the urea phantom. b Total signal (area-under-curve, AUC) images of urea from the same subject. The urea images overlaid on the corresponding 1H anatomical images are shown.
