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High resolution ultrasound brain scanner

The defocusing effect of the skull strongly limits the transcranial imaging capabilities of commercial ultrasonic scanners.

A fully programmable prototype dedicated to high resolution ultrasonic imaging of the brain has been constructed by Partner 5 in collaboration with Lecoeur Electronique (Subcontractor). An innovative aberration correction algorithm developed in the early stage of the UMEDS project has been successfully implemented on this new generation of ultrasonic scanner.

Contrary to commercial scanners, the influence of the skull bone is evaluated during a calibration process and its defocusing effect is corrected at best. At the beginning of the project the calibration phase required 30min. Thanks to the last developments, this calibration phase decreased down to 1min. After the calibration process, it is possible to obtain real time images by storing the set of emission signals in the electronics.

High resolution in vitro images have been obtained transcranially with this device. The resolution obtained through the skullbone is comparable to the one obtained without the presence of the skull: it means that the skull bone has been ultrasonically erased. This is a technical breakthrough in ultrasonic transcranial imaging.
Furthermore, real time capabilities have been implemented in September 2005, allowing to proceed in the near future to real time in vivo imaging of the brain with the prototype.

Informations connexes

Reported by

Laboratoire Ondes et Acoustique
ESPCI, 10 rue Vauquelin
75005 Paris
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