A noval method of correcting off-center errors for radial acquisition with arbitrary angle.
Ming Yang 1 , Haikun Qi 2 , Shuo Zhang 3 , Guang Qiang Geng 1 , Chen Guang Zhao 1 , Huijun Chen 2 , and Feng Huang 1
Philips Healthcare, Suzhou, Jiangsu, China,
for Biomedical Imaging Research, Tsinghua University,
Healthcare, Singapore, Singapore
This abstracts introduces a method to correct the
off-center issue caused by gradient delays in radial
arbitrary-angle acquisition. Instead of using 0-180
and 90-270 projection pairs, this method only requires
a number of pairs of pseudo anti-parallel projections
and then applies Linear regression method such as least
square method to estimate the gradient delays.
Therefore, the off-center error can be compensated
during the reconstruction for arbitrary-angle, such as
golden-angle radial acquisition. This method is tested
on phantom and human Golden-angle radial MR images and
result shows the image quality is improved with
off-center error corrected using this method.
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