Browsing by Subject "Detection sensitivity"

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    Huber function based reconstruction in accelerated phase-cycled bSSFP acquisitions for increased detection performance
    (IEEE, 2017) Ilıcak, Efe; Çukur, Tolga
    Balanced steady-state free precession imaging suffers from irrecoverable signal losses, called banding artifacts. A common way to alleviate banding artifacts without sacrificing scan-efficiency is to use multiple-acquisition methods that combine phase-cycled images. However, soft thresholding applications used during the recovery can reduce the detection performance and image quality. In this study, a reconstruction strategy that applies Huber function to increase detection sensitivity on small coefficients is evaluated. This strategy is compared with conventional methods in terms of peak signal to noise ratio and structural similarity index.
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    Ultrasensitive label-free microcavity biosensors with high selectivity
    (IEEE, 2011) Özgür, Erol; Bayındır, Mehmet; Aktaş, Ozan
    High quality factor whispering gallery mode microresonators have been recently shown to exhibit detection sensitivity of single molecule; however, the selectivity of these sensors among different types of analytes remains as an important issue, obscuring the broad applicability of optical microcavities. We demonstrate a surface modification strategy for fabrication of high selectivity and sensitivity microcavity biosensors in this study. © 2011 IEEE.