کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5407813 | 1393232 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Analytically exact correction scheme for signal extraction from noisy magnitude MR signals
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Analytically exact correction scheme for signal extraction from noisy magnitude MR signals Analytically exact correction scheme for signal extraction from noisy magnitude MR signals](/preview/png/5407813.png)
چکیده انگلیسی
An analytically exact method is proposed to extract the signal intensity and the noise variance simultaneously from noisy magnitude MR signals. This method relies on a fixed point formula of signal-to-noise ratio (SNR) and a correction factor. The correction factor, which is a function of SNR, establishes a fundamental link between the variance of the magnitude MR signal and the variance of the underlying Gaussian noise in the two quadrature channels. A more general but very similar method is developed for parallel signal acquisitions with multiple receiver coils. In the context of MR imaging, the proposed method can be carried out on a pixel-by-pixel basis if the mean and the standard deviation of the magnitude signal are available.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetic Resonance - Volume 179, Issue 2, April 2006, Pages 317-322
Journal: Journal of Magnetic Resonance - Volume 179, Issue 2, April 2006, Pages 317-322
نویسندگان
Cheng Guan Koay, Peter J. Basser,