Non-Local MRI Upsampling
In Magnetic Resonance Imaging, image resolution is limited by several
factors such as hardware or time constraints. In many cases,
the
acquired images have to be upsampled to match a specific resolution. In
such cases, image interpolation techniques have been
traditionally applied. However, traditional interpolation techniques
are not able to recover high frequency information of the underlying
high resolution data. In this paper, a new upsampling method
is
proposed to recover some of this high frequency information by using a
data-adaptive patch-based reconstruction in combination with a
subsampling coherence constraint. The proposed method has been
evaluated on synthetic and real clinical cases and compared
with
traditional interpolation methods. The proposed method is shown to
outperform classical interpolation methods compared in terms
of
quantitative measures and visual observation.
Details can be found in:
Manjón J.V., Coupé P., Buades A., Fonov V, Collins D.L., Robles M. Non-Local MRI Upsampling. Medical Image Analysis, 14(6), 784-792, 2010.
Demo data and the source code of the proposed method can be found here: