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核磁気共鳴画像法 (MRI) において、k空間（kくうかん、k-space） は実空間の画像データの逆フーリエ変換である空間を指す 。 あらかじめタイミングとパターンを厳密に定義したパルスシーケンスによりk空間上の領域を核磁気共鳴エコー信号で埋めていき、それをフーリエ変換することで位置空間 ...
K-space (functional analysis) In mathematics, more specifically in functional analysis, a K-space is an F-space such that every extension of F-spaces (or twisted sum) of the form. is equivalent to the trivial one [1] where is the real line .
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7 de jun. de 2016 · In the preceding chapters, k-space and the definitions of the Fourier transform are expressed in terms of cosine functions. However, that story is incomplete. Because cosine functions are symmetric functions (see Figure I1-14)—that is, they are the mirror images of themselves—they can describe only the symmetric components of images.. Real medical images are asymmetric, so cosine functions ...
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The K-space EXAFS showed relatively good agreement again between the SAC and the oxide standard up to high K, with the nanoparticle and bulk foil showing good levels of agreement at low K but less agreement as K went above 6Å −1, which is straightforwardly rationalized by nanoparticles having less bulk material due to their smaller size compared to metal foil standards.
24 de jul. de 2015 · The explanations for these artifacts use basic MR physics principles, including k-space encoding and signal processing principles. Solutions are proposed when possible. The purpose of this article is to update and familiarize the reader with the range of artifacts seen at body MR imaging at 1.5 T and 3 T and to explain the causes of these ...
