en fr Endocavitary applicator of therapeutic ultrasound integrated with RF receiver coil for high resolution MRI-controlled thermal therapy Applicateur local endocavitaire d’ultrasons thérapeutiques intégré avec antenne récReportar como inadecuado




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1 Applications des ultrasons à la thérapie

Abstract : This thesis presents technical and methodological developments aiming tooffer a viable alternative for the treatment of digestive cancers rectum and esophagus.
Compared to the standard methods of therapy, the high intensity contact ultrasound guided by MRI is a less invasive approach.
MRI offers 2 advantages: good spatial resolution, and real-time temperature control.
This treatment method requires efficacy and safety.
Three prototypes of RF coil integrated with ultrasound transducers were built in order to increase the spatial and temporal resolution ofthe MR images, and the accuracy of the temperature measurement.
The integrated coils showed a better sensitivity compared to a standard extracorporeal coil.
Anatomical voxel 0.4x0.4x5 mm3and thermometry voxel 0.75x0.75x8 mm3, 2s-image high resolution MR images were acquired in-vivo.
The temperature was measured, within a radius of 20 mm from the balloon, with a standard deviation



Autor: Mihaela Rata -

Fuente: https://hal.archives-ouvertes.fr/



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