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Abstract #3106

Comparative Evaluation of Three Different Filters for Phase Unwrapping from SWAN Imaging in Calcified Neurocysticercosis

Sanjay Kumar Verma1, Ram Kishan Singh Rathore2, Bhaswati Roy3, Ramesh Venkatesan4, Vijay Nimbargi4, Vinay Kulkarni4, Rishi Awasthi3, Rakesh Kumar Gupta3

1Laboratory of Molecular Imaging, Singapore Bioimaging Consortium, Helios, Singapore; 2Mathematics & Statistics, Indian Institute of Technology, Kanpur, India; 3Radiodiagnosis, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India; 4Wipro-GE Healthcare, Bangalore, India

Phase values of seventy four calcified cysts from patients with a diagnosis of NCC were quantified using Gaussian (22 22), Hanning (38 38) and Kaiser Bessel (64 64) low pass filter. Phase and CT images were registered using mutual information based registration technique. Kruskal-Wallis test suggest that phase values obtain from three filters are insignificantly different from each other. However Kaiser filter showed best correlation between positive phase and corresponding CT-HU values & Gaussian filter showed best negative correlation among all the filters used while comparing negative phase and corresponding CT-HU. We conclude that any of the filters can be used for phase quantification from SWAN imaging.