Sodium-23 MR imaging of the kidney in guinea pig at 2.1 T, following arterial, venous, and ureteral ligation
✍ Scribed by Munehiro Maeda; Yoshiteru Seo; Masataka Murakami; Satoru Kuki; Hiroshi Watari; Satoru Iwasaki; Hideo Uchida
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 408 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0740-3194
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✦ Synopsis
Abstract
In vivo ^23^Na magnetic resonance images of guinea pig kidney were obtained at 2.1 T using a spin‐echo sequence with an echo time of 19 ms. The intact kidney showed a very strong signal intensity in the sodium image. The signal intensity of the kidney decreased to 55% after ligation of the renal artery together with the vein and the ureter. The total sodium content in the excised kidney after arterial occlusion, measured by flame photometry, was 24% higher than that in the intact kidney. The transverse relaxation time (T~2~) of the extracellular sodium in the isolated kidney decreased to one‐third of that in the intact kidney. This shortening of T~2~ may be partly responsible for the decrease in the ^23^Na signal intensity from the kidney after arterial occlusion. © 1990 Academic Press, Inc.