1. Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, China
2. Hong Kong Centre for Cerebro-Cardiovascular Health Engineering (COCHE), Hong Kong, China
3. Department of Diagnostic Radiology, The University of Hong Kong, Hong Kong, China
4. Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
5. Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518057, China