MRI Technology
Real-time and interactive MRI requires entirely new imaging infrastructure that supports real-time reconstruction and display, as well as real-time operator controls (such as scan plane and image contrast). Our work is based on a recently developed framework called RTHawk. Within this system, we are developing accelerated acquisition schemes, and reconstruction techniques tailored to the upper airway. In addition, we are involved in the development and validation of new targeted phased array coils for imaging the upper airway.
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Audio Technology
We have developed a data acquisition setup for recording, and processing, running speech from a person in a magnetic resonance imaging (MRI) scanner. The main focus is on ensuring synchronicity between image and audio acquisition, and in obtaining good signal to noise ratio to facilitate further speech analysis and modeling. A field-programmable gate array based hardware design for synchronizing the scanner image acquisition to other external data such as audio is described. The audio setup itself features two fiber optical microphones and a noise-canceling filter. We use a novel approach to noise cancellation employing a pulse sequence specific model of the gradient noise of the MRI scanner. The setup is useful for scientific speech production studies.
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