Development and validation of a less-sensitive DTI-based fiber tractography approach employing cubic hermite splines and global connectivity information:
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Hamburg
2013
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| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | VI, 120 Seiten Illustrationen, Diagramme |
Internformat
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| 245 | 1 | 0 | |a Development and validation of a less-sensitive DTI-based fiber tractography approach employing cubic hermite splines and global connectivity information |c von Niklas Stein |
| 264 | 1 | |b Hamburg |c 2013 | |
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| 502 | |b Dissertation |c Universität Hamburg |d 2014 | ||
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Datensatz im Suchindex
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|---|---|
| adam_text | CONTENTS
ABSTRACT I
ZUSAMMENFASSUNG III
1 INTRODUCTION 1
2 THEORETICAL BACKGROUND 3
2.1 NUCLEAR MAGNETIC RESONANCE 3
2.1.1 SPIN AND PRECESSION 4
2.1.2 HIGH FREQUENCY PULSES 6
2.1.3 RELAXATION 6
2.2 MAGNETIC RESONANCE IMAGING 6
2.2.1 SLICE SELECTION 7
2.2.2 FREQUENCY ENCODING 7
2.2.3 PHASE ENCODING 8
2.2.4 3D IMAGE VOLUME RECONSTRUCTION 8
2.3 DIFFUSION TENSOR IMAGING 9
2.3.1 DIFFUSION 10
2.3.2 DTI ACQUISITION FRAMEWORK 10
2.3.3 DIFFUSION TENSOR 12
2.3.4 EIGENVALUE DECOMPOSITION 14
2.3.5 DTI DERIVED METRICS 14
2.3.6 DIFFUSION TENSOR FIELD VISUALIZATION 17
2.3.7 ARTIFACTS IN DIFFUSION TENSOR IMAGING 18
2.4 DIFFUSION OF WATER IN THE HUMAN BRAIN 27
2.4.1 NEURONS 27
2.4.2 AXONS 27
2.4.3 FASCICULI AND FIBER BUNDLES 27
2.4.4 WHITE MATTER 28
2.4.5 DIFFUSION IN WHITE MATTER 28
V
HTTP://D-NB.INFO/1066268762
VI
CONTENTS
2.5 FIBER TRACTOGRAPHY PRINCIPLES 28
2.5.1 BASIC CONCEPT 29
2.5.2 STREAMLINE-BASED METHODS 30
2.5.3 FRONT PROPAGATION-BASED METHODS 32
2.5.4 PROBABILISTIC APPROACHES 33
2.5.5 LIMITATIONS 34
2.6 AIMS OF THIS THESIS 35
3 METHODS 37
3.1 ROBUST FIBER TRACKING USING HERMITE CURVES 37
3.1.1 THE TRACTOGRAPHY CORE 37
3.1.2 ESTIMATION OF FIBER TRACT SEGMENTS WITH CUBIC SPLINES .... 42
3.1.3 THE TRACTOGRAPHY FRAMEWORK 51
3.2 GLOBAL CONNECTIVITY MAPS 58
3.2.1 CONNECTIVITY MAPS BETWEEN ACCESS NODES 59
3.2.2 GENERATION OF THE CONNECTIVITY MAP FROM TRACKING DATA ... 60
3.3 APPLICATION OF GLOBAL CONNECTIVITY MAPS TO FIBER TRACTOGRAPHY ... 70
3.3.1 REGIONS OF INTEREST 71
3.3.2 NODE ALLOCATION 71
3.3.3 ESTIMATING GLOBAL CONNECTIVITY 72
4 VALIDATION 73
4.1 VALIDATION STRATEGY 74
4.1.1 SYNTHESIZED DATA SETS 74
4.1.2 HUMAN DATA SETS 79
4.2 DATA SETS 81
4.2.1 SYNTHESIZED DATA SETS 81
4.2.2 HUMAN DATA SETS 87
4.3 EXPERIMENTS ON SYNTHESIZED DATA SETS 92
4.3.1 SYNTHESIZED DATA SETS 92
4.4 EXPERIMENTS ON HUMAN DATA SETS 96
4.4.1 UNRESTRICTED LOCAL TRACKING 97
4.4.2 GENERATION OF A PRIORI TRACTOGRAPHY INFORMATION 99
4.4.3 FIBER TRACKING WITH GLOBAL A PRIORI INFORMATION 100
5 CONCLUSION 105
5.1 FULFILLMENT OF CLAIMS 105
5.2 FUTURE PROSPECTS 107
REFERENCES 108
I
MPROVED
F
IBER
T
RACTOGRAPHY
E
MPLOYING
H
ERMITE
S
PLINES
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| author | Stein, Niklas |
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| discipline | Physik Informatik Medizin |
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| spelling | Stein, Niklas Verfasser (DE-588)1044944013 aut Development and validation of a less-sensitive DTI-based fiber tractography approach employing cubic hermite splines and global connectivity information von Niklas Stein Hamburg 2013 VI, 120 Seiten Illustrationen, Diagramme txt rdacontent n rdamedia nc rdacarrier Dissertation Universität Hamburg 2014 Bildverarbeitung (DE-588)4006684-8 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Bildverarbeitung (DE-588)4006684-8 s DE-604 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028596838&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Stein, Niklas Development and validation of a less-sensitive DTI-based fiber tractography approach employing cubic hermite splines and global connectivity information Bildverarbeitung (DE-588)4006684-8 gnd |
| subject_GND | (DE-588)4006684-8 (DE-588)4113937-9 |
| title | Development and validation of a less-sensitive DTI-based fiber tractography approach employing cubic hermite splines and global connectivity information |
| title_auth | Development and validation of a less-sensitive DTI-based fiber tractography approach employing cubic hermite splines and global connectivity information |
| title_exact_search | Development and validation of a less-sensitive DTI-based fiber tractography approach employing cubic hermite splines and global connectivity information |
| title_full | Development and validation of a less-sensitive DTI-based fiber tractography approach employing cubic hermite splines and global connectivity information von Niklas Stein |
| title_fullStr | Development and validation of a less-sensitive DTI-based fiber tractography approach employing cubic hermite splines and global connectivity information von Niklas Stein |
| title_full_unstemmed | Development and validation of a less-sensitive DTI-based fiber tractography approach employing cubic hermite splines and global connectivity information von Niklas Stein |
| title_short | Development and validation of a less-sensitive DTI-based fiber tractography approach employing cubic hermite splines and global connectivity information |
| title_sort | development and validation of a less sensitive dti based fiber tractography approach employing cubic hermite splines and global connectivity information |
| topic | Bildverarbeitung (DE-588)4006684-8 gnd |
| topic_facet | Bildverarbeitung Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028596838&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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