Comput Methods Programs Biomed - A comparative approach of four different image registration techniques for quantitative assessment of coronary artery calcium lesions using intravascular ultrasound.

Tópicos

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Resumo

In IVUS imaging, constant linear velocity and a constant angular velocity of 1800 rev/min causes displacement of the calcium in subsequent image frames. To overcome this error in intravascular ultrasound video, IVUS image frames must be registered prior to the lesion quantification. This paper presents a comprehensive comparison of four registration methods, namely: Rigid, Affine, B-Splines and Demons on five set of calcium lesion quantification parameters namely: (i) the mean lesion area, (ii) mean lesion arc, (iii) mean lesion span, (iv) mean lesion length, and (v) mean lesion distance from catheter. Using our IRB approved data of 100 patient volumes, our results shows that all four registrations showed a decrease in five calcium lesion parameters as follows: for Rigid registration, the values were: 4.92%, 5.84%, 5.89%, 5.27%, and 4.57%, respectively, for Affine registration the values were: 6.06%, 6.51%, 7.28%, 6.50%, and 5.94%, respectively, for B-Splines registration the values were: 7.35%, 8.03%, 9.54%, 8.18%, and 7.62%, respectively, and for Demons registration the five parameters were 7.32%, 8.02%, 10.11%, 7.94%, and 8.92% respectively. The relative overlap of identified lesions decreased by 5.91% in case of Rigid registration, 6.23% in case of Affine registration, 4.48% for Demons registration, whereas it increased by 3.05% in case of B-Splines registration. Rigid and Affine transformation-based registration took only 0.1936 and 0.2893 s per frame, respectively. Demons and B-Splines framework took only 0.5705 and 0.9405 s per frame, respectively, which were significantly slower than Rigid and Affine transformation based image registration.

Resumo Limpo

ivus imag constant linear veloc constant angular veloc revmin caus displac calcium subsequ imag frame overcom error intravascular ultrasound video ivus imag frame must regist prior lesion quantif paper present comprehens comparison four registr method name rigid affin bspline demon five set calcium lesion quantif paramet name mean lesion area ii mean lesion arc iii mean lesion span iv mean lesion length v mean lesion distanc cathet use irb approv data patient volum result show four registr show decreas five calcium lesion paramet follow rigid registr valu respect affin registr valu respect bspline registr valu respect demon registr five paramet respect relat overlap identifi lesion decreas case rigid registr case affin registr demon registr wherea increas case bspline registr rigid affin transformationbas registr took s per frame respect demon bspline framework took s per frame respect signific slower rigid affin transform base imag registr

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