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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한자기공명의과학회 Investigative Magnetic Resonance Imaging Investigative Magnetic Resonance Imaging 제24권 제4호
- 발행연도
- 2020.1
- 수록면
- 232 - 240 (9page)
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Purpose: To generate the under-sampling pattern using a self-supervised learning framework based on a graph convolutional network. Materials and Methods: We first decoded the k-space data into the graph and put it into the network. After the processing of graph convolution layers and graph pooling layers, the network generated the under-sampling pattern for MR reconstruction. We trained the network on the simulated brain dataset enabled by the selfsupervised learning strategy. We did simulation along with the in vivo brain and liver experiments under different noise levels and accelerating factors to compare the performance between the proposed method and traditional methods using the PSNR and SSIM index. Results: The simulation experiments showed that the proposed method can achieve the best performance with low accelerating factors (2 and 3) at all noise levels and in high accelerating factors (4 and 5) at high noise levels (50 and 70 dB). In in vivo experiments, the proposed method attained the highest PSNR and SSIM in the brain dataset as well as in the liver dataset after fine tuning on a small liver dataset. Conclusion: The self-supervised learning framework based on a graph convolutional network was able to design the under-sampling mask for MR reconstruction. The superior performance in the simulation and in vivo experiments demonstrated the feasibility and flexibility of the proposed method and its potential in clinical use.
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참고문헌 (15)
참고문헌 신청
Pruessmann KP / 1999 / SENSE : sensitivity encoding for fast MRI / Magn Reson Med 42:952~962
Griswold MA / 2002 / Generalized autocalibrating partially parallel acquisitions(GRAPPA) / Magn Reson Med 47:1202~1210
Lustig M / 2007 / Sparse MRI : the application of compressed sensing for rapid MR imaging / Magn Reson Med 58:1182~1195
Knoll F / 2011 / Adapted random sampling patterns for accelerated MRI / MAGMA 24:43~50
Zhang Y / 2014 / Energy preserved sampling for compressed sensing MRI / Comput Math Methods Med 2014:546814
Griswold MA / 2002 / Generalized autocalibrating partially parallel acquisitions(GRAPPA) / Magn Reson Med 47:1202~1210
Lustig M / 2007 / Sparse MRI : the application of compressed sensing for rapid MR imaging / Magn Reson Med 58:1182~1195
Knoll F / 2011 / Adapted random sampling patterns for accelerated MRI / MAGMA 24:43~50
Zhang Y / 2014 / Energy preserved sampling for compressed sensing MRI / Comput Math Methods Med 2014:546814
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