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- W2040226324 abstract "Compatible dual-echo arteriovenography (CODEA) is a recently developed technique for simultaneous acquisition of time-of-flight MR angiogram (MRA) and blood oxygenation level-dependent MR venogram (MRV) using an echo-specific k-space reordering scheme. In this study, we evaluated and compared the image quality of CODEA MRA/MRV implemented with two different schemes of echo-specific k-space reordering: one along the 1st phase-encode direction (one-dimensional) only and the other along both phase-encode directions (two-dimensional). Our results showed that use of the two-dimensional reordering scheme improved contrast-to-noise ratio of small arteries by approximately 8%, although not statistically significant (P > 0.1). Contrast-to-noise ratio of the CODEA MRAs was better than that for the non-CODEA dual-echo MRA without k-space reordering (contrast-to-noise ratio increased in large arteries by approximately 10% and small arteries by approximately 45%; P < 0.1). Contrast-to-noise ratio of the CODEA MRAs was comparable with that of the conventional single-echo MRA for large arteries but reduced by approximately 20% for small arteries. Contrast-to-noise ratio of veins on the CODEA MRVs was equivalent to that of the conventional single-echo and the non-CODEA dual-echo MRVs. However, some veins in the CODEA MRVs showed stronger contrast than those in the single-echo MRV in relation to the contrast of neighboring arterial signals." @default.
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- W2040226324 date "2010-04-23" @default.
- W2040226324 modified "2023-10-09" @default.
- W2040226324 title "Quantitative evaluation of k-space reordering schemes for compatible dual-echo arteriovenography (CODEA)" @default.
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- W2040226324 doi "https://doi.org/10.1002/mrm.22304" @default.
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