Encapsulated liquid crystals as probes for remote thermometry

A temperature probe based on the magnetic resonance properties of an encapsulated liquid crystal has been investigated. Large changes in magnetic resonance signals occur as the liquid crystal undergoes a phase transition from an anisotropic (nematic) state to the isotropic liquid. The low latent hea...

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Bibliographic Details
Published in:	International journal of hyperthermia Vol. 8; no. 2; p. 253
Main Authors:	Franklin, K J, Buist, R J, den Hartog, J, McRae, G A, Spencer, D P
Format:	Journal Article
Language:	English
Published:	England 1992
Subjects:	Benzylidene Compounds Capsules Crystallization Evaluation Studies as Topic Humans Hyperthermia, Induced - instrumentation Magnetic Resonance Imaging Models, Structural Palmitates Thermodynamics Thermometers
Online Access:	Get more information
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Summary:	A temperature probe based on the magnetic resonance properties of an encapsulated liquid crystal has been investigated. Large changes in magnetic resonance signals occur as the liquid crystal undergoes a phase transition from an anisotropic (nematic) state to the isotropic liquid. The low latent heat of such phase transitions allows for rapid phase changes during a hyperthermia treatment. Transition temperatures can be tailored by adding suitable compounds such as analogues of the liquid crystal or various solvents. Encapsulation is required to maintain the integrity of the liquid crystal, particularly for applications in vivo. Results of preliminary studies designed to demonstrate the technical feasibility of the concept are presented.
ISSN:	0265-6736
DOI:	10.3109/02656739209021780