Segmentation and registration of CT multi-phase images for PDF

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[PDF] Segmentation and registration of CT multi-phase images for

Pei NIU Multi-energy image reconstruction in

CHIMIE CHIMIE DE LYON

E.E.A. ÉLECTRONIQUE,

ÉLECTROTECHNIQUE,

AUTOMATIQUE

E2M2 ÉVOLUTION, ÉCOSYSTÈME,

MICROBIOLOGIE, MODÉLISATION

EDISS INTERDISCIPLINAIRE

SCIENCES-SANTÉ

INFOMATHS

INFORMATIQUE ET

MATHÉMATIQUES

Matériaux

MATÉRIAUX DE LYON

MEGA MÉCANIQUE, ÉNERGÉTIQUE,

GÉNIE CIVIL, ACOUSTIQUE

ACKNOWLEDGEMENT I

CONTENTS III

0.1 Problem statement and objective ........................................................................ 1

0.2 Main contributions .............................................................................................. 2

0.3 Organization of the thesis .................................................................................... 4

1.1 X-r ay computed tomography (CT) .................................................................... 7

1.1.1 Basis of X-ray CT ....................................................................................... 7

1.1.2 Princ iples of CT ......................................................................................... 7

1.2 Spe ctral CT (sCT)............................................................................................. 13

1.2.1 Devel opment of sCT ................................................................................ 13

1.2.2 Model of sCT ........................................................................................... 17

1.2.3 Appli cation of sCT .................................................................................... 18

1.3 Sum mary ........................................................................................................ 21

2.1 Int roduction ................................................................................................... 25

2.2 Ana lytical methods ......................................................................................... 25

2.3 Ite rative methods ........................................................................................... 29

2.3.1 Algeb raic reconstruction techniques (ART) ............................................... 30

2.3.2 Regul arization models ............................................................................. 32

2.4 Lea rning methods ........................................................................................... 35

2.5 Sum mary ........................................................................................................ 36

3.1 Int roduction ................................................................................................... 41

3.2 Met hods......................................................................................................... 42

3.2.1 Imagi ng configurations ............................................................................ 42

3.2.2 aCT ......................................................................................................... 45

3.2.3 fCT .......................................................................................................... 48

3.3 Exp eriments and Results ................................................................................. 48

3.3.2 aCT ......................................................................................................... 48

3.3.4 sCT p arameter settings ............................................................................ 57

3.4 Dis cussion ...................................................................................................... 60

3.5 Con clusion ..................................................................................................... 62

4.1 Int roduction ................................................................................................... 65

4.2 Met hod .......................................................................................................... 65

4.2.1 Theor y basis of the method ..................................................................... 65

4.2.2 Mater ial-dependent clustering................................................................. 70

4.2.3 Linea r fitting between bins ...................................................................... 71

4.2.4 Recon struction denoising via fitting results .............................................. 72

4.3 Res ults ........................................................................................................... 73

4.3.1 Simul ation ............................................................................................... 73

4.3.2 Real data ................................................................................................. 76

4.4 Dis cussion ...................................................................................................... 82

4.5 Con clusion ..................................................................................................... 83

5.1 Int roduction ................................................................................................... 87

5.2 Met hod .......................................................................................................... 87

5.2.1 Intra -bin denoising .................................................................................. 87

5.2.2 Combi ned Intra- and inter-bin denoising .................................................. 90

5.3 Exp eriments and results ................................................................................. 91

5.3.1 Resul ts on simulation .............................................................................. 91

5.3.2 Resul ts on physical phantom ................................................................... 96

5.4 Dis cussion ...................................................................................................... 98

5.5 Con clusion ..................................................................................................... 99

ABSTRACT V

RESUME VII

SYNTHESE EN FRANÇAIS IX

SYNTHESE EN FRANÇAIS X

SYNTHESE EN FRANÇAIS XI

SYNTHESE EN FRANÇAIS XII

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