Increasing spatial resolution and comparison of MR imaging sequences for the inner ear

Carl J. Snyder; Lizann Bolinger; Jay T. Rubinstein; Ge Wang

doi:10.1117/12.463610

24 April 2002 Increasing spatial resolution and comparison of MR imaging sequences for the inner ear

Carl J. Snyder, Lizann Bolinger, Jay T. Rubinstein, Ge Wang

Proceedings Volume 4683, Medical Imaging 2002: Physiology and Function from Multidimensional Images; (2002) https://doi.org/10.1117/12.463610
Event: Medical Imaging 2002, 2002, San Diego, California, United States

Abstract

The size and location of the cochlea and cochlear nerve are needed to assess the feasibility of cochlea implantation, provide information for surgical planning, and aid in construction of cochlear models. Models of implant stimulation incorporating anatomical and physiological information are likely to provide a better understanding of the biophysics of information transferred with cochlear implants and aid in electrode design and arrangement on cochlear implants. Until recently MR did not provide the necessary image resolution and suffered from long acquisition times. The purpose of this study was to optimize both Fast Spin Echo (FSE) and Steady State Free Precession (FIESTA) imaging scan parameters for the inner ear and comparatively examine both for improved image quality and increased spatial resolution. Image quality was determined by two primary measurements, signal to noise ratio (SNR), and image sharpness. Optimized parameters for FSE were 120ms, 3000ms, 64, and 32.25kHz for the TE, TR, echo train length, and bandwidth, respectively. FIESTA parameters were optimized to 2.7, 5.5ms, 70 degree(s), and 62.5kHz, for TE, TR, flip angle, and bandwidth, respectively. While both had the same in-plane spatial resolution, 0.625mm, FIESTA data shows higher SNR per acquisition time and better edge sharpness.

Citation Download Citation

Carl J. Snyder, Lizann Bolinger, Jay T. Rubinstein, and Ge Wang "Increasing spatial resolution and comparison of MR imaging sequences for the inner ear", Proc. SPIE 4683, Medical Imaging 2002: Physiology and Function from Multidimensional Images, (24 April 2002); https://doi.org/10.1117/12.463610

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KEYWORDS

Signal to noise ratio

Magnetic resonance imaging

Spatial resolution

Image resolution

Computed tomography

Ear

Image quality

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