Research Student

Postgraduate Teaching Assistant

Centre for Medical Image Computing

Department of Computer Science

University College London

Contact Information

Email: Y.Bai(at)cs.ucl.ac.uk

Page in CS Department: http://www.cs.ucl.ac.uk/people/Y.Bai.html

Page in CMIC Group: http://cmic.cs.ucl.ac.uk/staff/yu_bai/

Research Overview

Diffusion Magnetic Resonance Imaging (MRI) technique needs longer time of scanning to patients, in order to acquire data set containing more information. During data acquisition, small head movements, such as translation and rotations are not easy to avoid, especially for baby patients. Adding some distortion from the imaging algorithm itself, the further imaging steps normally require prealignment.

The traditional method uses a non-diffusion-weighted image as the reference for registration, but the differences between diffusion-weighted images and the non-diffusion weighted reference image can cause mismatching to occur during registration, even using metrics like the mutual information (MI) that accounts for non-linear contrast differences.

Figure 1. Compare between Traditional Method (top) and Model-Based method (down)

Figure 2  demonstrates quantitative improvements using the new approaches on a full data with slight, but typical, movement during acquisition.

Figure 2. Three specified regions (coloured in red) for comparing measurement’s alignment.

Feel free to contact me for further details.

Supervisor

Daniel Alexander

Simon Arridge

Group

Centre for Medical Image Computing

Vision and Imaging Science

Camino

Teaching

Postgraduate Teaching Assistant

D100 - Introductory Programming

D101 - Advanced Programming

3C79/D31 - Graphics (Image Processing and Graphics)

3C72/VIVE0012 - Image Processing (Image Processing and Graphics)

Publications

- Y. Bai and D. C. Alexander, “Model-Based Registration to Correct for Motion between Acquisitions in Diffusion MR Imaging”, The Fifth IEEE International Symposium on Biomedical Imaging ( ISBI 2008), May 2008.

- Y. Bai and D. C. Alexander, “Correcting for Motion between Acquisitions in Diffusion MR Imaging”, Medical Image Understanding and Analysis ( MIUA2006), May 2006.

- Y. Bai, P. A. Cook, H. Zhang and D. C. Alexander, “Motion Correction in Diffusion Magnetic Resonance”, International Society for Magnetic Resonance in Medicine (ISMRM) 14th Scientific Meeting and Exhibition, May 2006. (ISMRM Educational Stipend Award)

- P. A. Cook, Y. Bai, M. G. Hall, S. Nedjati-Gilani, K. K. Seunarine and D. C. Alexander, “Camino: Open-Source Diffusion-MRI Reconstruction and Processing”, International Society for Magnetic Resonance in Medicine (ISMRM) 14th Scientific Meeting and Exhibition, May 2006.

- P. A. Cook, Y. Bai, M. G. Hall, S. Nedjati-Gilani, K. K. Seunarine and D. C. Alexander, "Camino: Diffusion MRI reconstruction and processing", ISC / NA-MIC / MICCAI Workshop on Open-Source Software, Medical Image Computing and Computer-Assisted Intervention, Palm Springs, CA, USA, October 2005.

Others

My camino fun ^o^