The chemical shifts of 31P and 1H in thulium 1,4,7,10- tetraazacyclododecane-1,4,7,10-tetrakis(methylene phosphonate) (TmDOTP5-) are approximately two orders of magnitude more sensitive to temperature than are water proton and 19F shifts. In the physiologically relevant pH range, the 31P and 1H chemical shifts of TmDOTP5- are linear functions of temperature between 25 and 47°C. The results indicate that using Tm-DOTP5- can provide measurements of temperature in vivo that are significantly more accurate than methods based on water and fluorocarbon chemical shifts.
- magnetic resonance spectroscopy
- temperature measurement
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging