EddySim: a problem solving environment for hardware-related eddy current simulations in magnetic resonance imaging:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
München
Verl. Dr. Hut
2010
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| Ausgabe: | 1. Aufl. |
| Schriftenreihe: | Informatik
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| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XIII, 188 S. Ill., graph. Darst. 240 mm x 170 mm, 427 g |
| ISBN: | 9783868535792 |
Internformat
MARC
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| 100 | 1 | |a Lechner, Silke-Maria |e Verfasser |0 (DE-588)142549118 |4 aut | |
| 245 | 1 | 0 | |a EddySim: a problem solving environment for hardware-related eddy current simulations in magnetic resonance imaging |c Silke M. Lechner |
| 250 | |a 1. Aufl. | ||
| 264 | 1 | |a München |b Verl. Dr. Hut |c 2010 | |
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Datensatz im Suchindex
| _version_ | 1804143366256984064 |
|---|---|
| adam_text | IMAGE 1
CONTENTS
ABSTRACT M
Z U S A M M E N F A S S U NG V
LIST OF S Y M B O LS XI
1 INTRODUCTION 1
2 BASIC PRINCIPLES OF MAGNETIC RESONANCE IMAGING 5
2.1 NUCLEAR MAGNETIC RESONANCE 6
2.1.1 BEHAVIOR OF SPINS IN EXTERNAL MAGNETIC FIELDS 6
2.1.2 THE BLOCH EQUATIONS: PRECESSION AND RELAXATION 7
2.2 MAGNETIC RESONANCE IMAGING 8
2.2.1 THE SLICE EXCITATION PROCESS 9
2.2.2 SPATIAL LOCALIZATION: FREQUENCY AND PHASE ENCODING 10
2.2.3 MRI FROM A SIGNAL PROCESSING PERSPECTIVE 11
2.2.4 PULSE SEQUENCE AND PULSE SEQUENCE DIAGRAM 14
2.3 THE MRI SYSTEM 16
2.3.1 MAIN MAGNET AND CRYOSTAT 16
2.3.2 GRADIENT COILS 17
2.3.3 RF AND RECEIVER COILS 19
3 EDDY CURRENTS 21
3.1 EDDY CURRENT FORMATION 21
3.2 EDDY CURRENT COMPENSATION TECHNIQUES 23
3.2.1 SHIELDING OF GRADIENT COILS 23
3.2.2 GRADIENT WAVEFORM PRE-EMPHASIS 23
3.2.3 K-TRAJECTORY CALIBRATION TECHNIQUES 24
3.3 EDDY CURRENT EFFECT ON IMAGE QUALITY 25
4 SIMULATIONS WITHIN MRI 29
4.1 MR IMAGE FORMATION 30
4.1.1 MRI IMAGE SYNTHESIS 31
4.1.2 K-SPACE SAMPLING SIMULATION 33
4.1.3 ISOCHROMAT SUMMATION (TIME-DOMAIN) METHOD 35
VU
BIBLIOGRAFISCHE INFORMATIONEN HTTP://D-NB.INFO/1007584742
DIGITALISIERT DURCH
IMAGE 2
CONTENTS
4.1.4 CONCLUSIONS 38
4.2 MRI HARDWARE SIMULATIONS 40
4.2.1 BOUNDARY ELEMENT METHOD - BEM 41
4.2.2 FINITE-DIFFERENCE TIME-DOMAIN METHOD - FDTD 43
4.2.3 FINITE ELEMENT METHOD - FEM 45
4.2.4 CONCLUSIONS 49
4.3 MOTIVATION FOR EDDYSIM 50
5 EDDYSIM - THE CONCEPT 55
5.1 EDDYSIM - DESIGN AND ARCHITECTURE 55
5.2 EDDYSIM - COMPONENTS 58
5.2.1 PULSE SEQUENCE SPECIFICATION 58
5.2.2 ELECTROMAGNETIC FIELD SIMULATIONS 59
5.2.3 MAGNETIZATION COMPUTATION 61
5.2.4 SIGNAL FORMATION AND IMAGE RECONSTRUCTION 63
5.3 EDDYSIM - EXEMPLARY RESULTS 64
5.4 EDDYSIM - IN A NUTSHELL 70
6 MR HARDWARE SIMULATION IN EDDYSIM 83
6.1 MAXWELL S EQUATIONS 84
6.2 MAXWELWD - THE SOFTWARE PACKAGE 85
6.2.1 EDDY CURRENT SIMULATION WITH MAXWELWD 86
6.2.2 EDDY CURRENT CHARACTERIZATION USING MAXWELLSD FIELD DATA . .. 90
6.3 MESHING WITH MAXWELLSD 91
6.3.1 MAXWELLSD S MESH FUNCTIONALITIES 92
6.3.2 PROBLEM SPECIFIC MESH STEERING 93
6.3.3 SURVEY 102
6.4 SOLUTION APPROACHES FOR EFFICIENT SIMULATIONS 104
6.4.1 REDUCTION OF PHASE ENCODING STEPS 105
6.4.2 COARSE TIME STEPPING 107
6.4.3 STATIONARY VERSUS SCALED SAMPLING 109
6.4.4 SYMMETRY BOUNDARY CONDITIONS 110
6.4.5 IMPULSE RESPONSE I LL
6.4.6 MULTIPROCESSING WITH MAXWELLSD 113
6.4.7 SURVEY 114
6.5 SUMMARY 115
7 ACCELERATED MR IMAGE FORMATION SIMULATION ON GPU 117
7.1 THE GIVEN GPU ENVIRONMENT 119
7.2 IMPLEMENTATION OF PARALLELIZATION 120
7.3 RESULTS 124
7.3.1 EXPERIMENTAL SETUP 124
7.3.2 NUMERICAL RESULTS 126
VIN
IMAGE 3
CONTENTS
7.4 DISCUSSION 129
7.5 SUMMARY 131
8 EDDYSIM - TECHNICAL RESULTS 133
8.1 THE UNIPLANAR GRADIENT SET 135
8.1.1 GEOMETRY MODEL 138
8.1.2 MAGNETOSTATIC VALIDATION 139
8.1.3 MESH STUDY 143
8.2 TRANSIENT EVALUATIONS OF THE UNIPLANAR GRADIENT SET 148
8.2.1 EDDY CURRENT CALIBRATION 148
8.2.2 THE EDDY CURRENT CALIBRATION OF THE UNIPLANAR GRADIENT SET . ..
149 8.2.3 TRANSIENT EDDY CURRENT SIMULATIONS WITH MAXWELLSD 155
8.3 IMAGING EXPERIMENTS 160
8.3.1 EXPERIMENTAL SETUP 160
8.3.2 RESULTS 164
8.4 DISCUSSION AND SUMMARY 169
9 CONCLUSIONS AND FUTURE WORK 171
9.1 SUMMARY 171
9.2 FUTURE WORK 174
BIBLIOGRAPHY 177
IX
|
| any_adam_object | 1 |
| author | Lechner, Silke-Maria |
| author_GND | (DE-588)142549118 |
| author_facet | Lechner, Silke-Maria |
| author_role | aut |
| author_sort | Lechner, Silke-Maria |
| author_variant | s m l sml |
| building | Verbundindex |
| bvnumber | BV036718770 |
| classification_tum | DAT 780d MED 386d |
| ctrlnum | (OCoLC)705902762 (DE-599)DNB1007584742 |
| dewey-full | 621.3994 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 621 - Applied physics |
| dewey-raw | 621.3994 |
| dewey-search | 621.3994 |
| dewey-sort | 3621.3994 |
| dewey-tens | 620 - Engineering and allied operations |
| discipline | Informatik Medizintechnik Elektrotechnik / Elektronik / Nachrichtentechnik Medizin |
| edition | 1. Aufl. |
| format | Thesis Book |
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| indexdate | 2024-07-09T22:46:31Z |
| institution | BVB |
| isbn | 9783868535792 |
| language | English |
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| spelling | Lechner, Silke-Maria Verfasser (DE-588)142549118 aut EddySim: a problem solving environment for hardware-related eddy current simulations in magnetic resonance imaging Silke M. Lechner 1. Aufl. München Verl. Dr. Hut 2010 XIII, 188 S. Ill., graph. Darst. 240 mm x 170 mm, 427 g txt rdacontent n rdamedia nc rdacarrier Informatik Zugl.: München, Techn. Univ., Diss., 2010 Simulation (DE-588)4055072-2 gnd rswk-swf Wirbelstrom (DE-588)4190009-1 gnd rswk-swf Kernspintomografie (DE-588)4120806-7 gnd rswk-swf Spulensystem (DE-588)4226249-5 gnd rswk-swf Bildqualität (DE-588)4140560-2 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Kernspintomografie (DE-588)4120806-7 s Spulensystem (DE-588)4226249-5 s Wirbelstrom (DE-588)4190009-1 s Bildqualität (DE-588)4140560-2 s Simulation (DE-588)4055072-2 s DE-604 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=020636695&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Lechner, Silke-Maria EddySim: a problem solving environment for hardware-related eddy current simulations in magnetic resonance imaging Simulation (DE-588)4055072-2 gnd Wirbelstrom (DE-588)4190009-1 gnd Kernspintomografie (DE-588)4120806-7 gnd Spulensystem (DE-588)4226249-5 gnd Bildqualität (DE-588)4140560-2 gnd |
| subject_GND | (DE-588)4055072-2 (DE-588)4190009-1 (DE-588)4120806-7 (DE-588)4226249-5 (DE-588)4140560-2 (DE-588)4113937-9 |
| title | EddySim: a problem solving environment for hardware-related eddy current simulations in magnetic resonance imaging |
| title_auth | EddySim: a problem solving environment for hardware-related eddy current simulations in magnetic resonance imaging |
| title_exact_search | EddySim: a problem solving environment for hardware-related eddy current simulations in magnetic resonance imaging |
| title_full | EddySim: a problem solving environment for hardware-related eddy current simulations in magnetic resonance imaging Silke M. Lechner |
| title_fullStr | EddySim: a problem solving environment for hardware-related eddy current simulations in magnetic resonance imaging Silke M. Lechner |
| title_full_unstemmed | EddySim: a problem solving environment for hardware-related eddy current simulations in magnetic resonance imaging Silke M. Lechner |
| title_short | EddySim: a problem solving environment for hardware-related eddy current simulations in magnetic resonance imaging |
| title_sort | eddysim a problem solving environment for hardware related eddy current simulations in magnetic resonance imaging |
| topic | Simulation (DE-588)4055072-2 gnd Wirbelstrom (DE-588)4190009-1 gnd Kernspintomografie (DE-588)4120806-7 gnd Spulensystem (DE-588)4226249-5 gnd Bildqualität (DE-588)4140560-2 gnd |
| topic_facet | Simulation Wirbelstrom Kernspintomografie Spulensystem Bildqualität Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=020636695&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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