Temperature monitoring during MR imaging: comparison of fluoroptic and standard thermistors

Temperature readings from standard wire lead thermistor probes and a fluoroptic temperature probe were compared before, during, and after exposure to a spin-echo imaging sequence at 2.35 T. All the probes were placed in saline-filled vials (1-mL capacity) surrounded by dense foam rubber to isolate and preserve local heating effects. There were no consistent differences in the temperatures recorded by the various probes. The authors conclude that wire lead thermistor probes do not exhibit substantial heat deposition when exposed to a standard spin-echo imaging sequence at 2.35 T.