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Master's Thesis - Studierstube Augmented Reality Project - Graz ...

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Contents<br />

1 Introduction 1<br />

2 Visualization 5<br />

2.1 Technical Visualization . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6<br />

2.1.1 Scientific Visualization . . . . . . . . . . . . . . . . . . . . . . . . 6<br />

2.2 Advanced Graphics Processing . . . . . . . . . . . . . . . . . . . . . . . 29<br />

2.2.1 The Latest Available Graphics Hardware . . . . . . . . . . . . . 30<br />

2.2.2 GPGPU - General-Purpose Computation on the GPU . . . . . . 32<br />

3 Magnetic Resonance Imaging for Flow Sensitive Data 35<br />

3.1 Magnetic Field and Magnetization . . . . . . . . . . . . . . . . . . . . . 36<br />

3.2 Excitation of Magnetized Matter . . . . . . . . . . . . . . . . . . . . . . 40<br />

3.2.1 Precession and Relaxation . . . . . . . . . . . . . . . . . . . . . . 41<br />

3.2.2 Nuclear Magnetic Resonance Signal . . . . . . . . . . . . . . . . 42<br />

3.3 Signal localization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44<br />

3.3.1 Slice Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45<br />

3.3.2 Voxel Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46<br />

3.3.3 Image Formation . . . . . . . . . . . . . . . . . . . . . . . . . . . 47<br />

3.4 Image Contrast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50<br />

3.5 Cine Cardiac Fast Low-Angle Shot with Parallel-Imaging Technique . . 52<br />

3.5.1 Phase-Contrast Imaging . . . . . . . . . . . . . . . . . . . . . . . 55<br />

3.5.2 Data Acquisition . . . . . . . . . . . . . . . . . . . . . . . . . . . 60<br />

4 Work-Flow and System Architecture 62<br />

4.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62<br />

4.2 Data Preprocessing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65<br />

4.2.1 Venc Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 65<br />

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