2nd Step

Modify the codes to achieve the cather's Axis, and the particles can be injected by that direction. The particles injected as that cather's axis' direction, and then, those particles will run as normal.
The number is 100, and the colours are fading....

New Progress. I have achieve the injection simulation from the moving catheter!!!!

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These days, I also read and download about 200 papers of Medical Imaging and Augmented Reality. Edited by Prof. Guang-Zhong Yang.

[1] Medical Imaging and Augmented Reality
4th International Workshop Tokyo, Japan, August 1-2, 2008, Proceedings[1]

[2] Medical Imaging and Augmented Reality
Third International Workshop, Shanghai, China, August 17-18, 2006, Proceedings[2]

[3] Medical Imaging and Augmented Reality
Second International Workshop, MIAR 2004, Beijing, China, August 19-20, 2004. Proceedings[3]

[4] Medical Imaging and Augmented Reality
First International Workshop, MIAR 2001, Hong Kong, China, June 10-12, 2001. Proceedings. IEEE Computer Society 2001[4]

[5] The Basics of MRI.

[6] Mathematics and Physics of Emerging Biomedical Imaging.

[7] Fundations of Medical Imaging.