The phantoms also contained real subject rigid and nonrigid body motion and noise.
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Furthermore, dynamically measured plants may exhibit nonuniform movements that require application of nonrigid registration techniques.
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Purpose: To propose and evaluate a novel nonrigid image registration approach for improved myocardial T1 mapping.
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We aligned early and late FA frames in the video by a two-step nonrigid registration method.
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Results: Fully automatic, nonrigid registration was compared to previously validated rigid body registration that required user interaction.
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Methods: Myocardial motion is estimated as global affine motion refined by a novel local nonrigid motion estimation algorithm.
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For rigid, semi-, and nonrigid dirigibles, for aeroflots and engines, the Jhour factories were the guarantors of quality.
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B-spline nonrigid image registration and optimization by χ² test against pharmacokinetic model curve were performed on dynamic contrast-enhancedMRI.
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Transformations so obtained are refined with an intensity-based nonrigid registration algorithm that includes spatial adaptation of the transformation's stiffness.
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The "reverse" technique offers additional degrees of freedom as it involves nonrigid registration of the planning CT to the CBCT.
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We learn the nonrigid deformation characteristics from a principal component analysis of a set of training deformations and demonstrate results using clinical data.
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We show that our technique significantly outperforms both standard rigid and nonrigid intensity-based registration methods in terms of mean and maximum registration error.
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His answer was a motor-powered balloon with a hard shell, called a dirigible (as opposed to a nonrigid airship, or blimp).
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Conclusions: The proposed nonrigid registration approach reduces the respiratory-induced motion that occurs during breath-hold T1 mapping, and significantly improves T1 map quality.
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The phantoms also contained real subject rigid and nonrigid body motion and noise.
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Furthermore, dynamically measured plants may exhibit nonuniform movements that require application of nonrigid registration techniques.