Meeting Banner
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.

Abstract PDF E-Poster Video

Keywords

according acquisition addition among angiography approval approved arbitrary artifact artifacts axial background basis best brain calcified calcium calculation channel coil collected committee comparable comparing component conclude consistent consisting consortium contrast correlates correlation creating cyst cysts defined defines derived determines diagnosis diamagnetic differentiating distance domain done electric endemic ethics evaluation explored field filter filtered filters form frequency function general give good graduate guidelines head hence illustrates imaginary improves included insignificant institute institutional inter iron irrespective kaiser kind known laboratory lesion lesions like linear local look magnetization material mathematics matrix measure measures median meeting modified molecular much mutual negative noise obscure origin paramagnetic parasite pass patients positive post predominantly processed processing produce quantification quantitative radian real reduce registered registration remove removing respectively scanner separately sets seventy shape slice slowly smoother spacing spatial spatially statistical statistics substance substantially susceptibility swan table technology threshold tissue tissues truncation underwent unwrapping useful various view volume world zeroth