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Development of Novel Deep Learning Techniques for Accelerated Diffusion MRI
Development of Novel Deep Learning Techniques for Accelerated Diffusion MRI
Development of Novel Deep Learning Techniques for Accelerated Diffusion MRI

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211152758
ISBN  
9798384039891
DDC  
616
저자명  
Martin, Phillip.
서명/저자  
Development of Novel Deep Learning Techniques for Accelerated Diffusion MRI
발행사항  
[Sl] : The University of Arizona, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
104 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
주기사항  
Advisor: Bilgin, Ali.
학위논문주기  
Thesis (Ph.D.)--The University of Arizona, 2024.
초록/해제  
요약Diffusion Magnetic Resonance Imaging (dMRI) is an imaging modality of MRI that features a non-invasive technique for qualitatively and quantitatively characterizing microstructural characteristics in tissue. This is achieved by dMRI being sensitive to the Brownian motion of water molecules in tissue measured over an applied magnetic field gradient. The directional orientations of motion of water molecules are estimated over an isotropic gaussian propagator. This capability enables dMRI to achieve resolution of microstructural features of up to 2-3 orders of magnitude below the resolution limit of conventional MRI. However, delineation of resolving features and characteristics with high degrees of architectural specificities requires making underlying assumptions of the underlying diffusion signals and invoking appropriate mathematical and computational solutions to achieve this. One computational technique of interest for dMRI is Diffusion Tensor Imaging (DTI). DTI enables anisotropic measurements to be acquired by fitting multiple diffusion-weighted images (DWIs) to a tensor, enabling 3D reconstructions of microstructural features of the brain, including the ability to reconstruct trajectories of white-matter tracts. Some of the challenges of performing DTI in routine clinical and research studies include long data acquisition times required to obtain sufficiently large number of DWIs for outputting robust tensor estimates. This involves long scan times and typically introduces undesired image distortions and artifacts that deteriorate image quality. In addition, DTI has limitations in accurately delineating more complex microstructural features in white-matter tracts. Models in Diffusion Kurtosis Imaging (DKI) and Constrained Spherical Deconvolution (CSD) offer improvements over DTI. However, these models require considerably more data than DTI and are generally more complex to implement. Although some prior deep learning (DL) techniques have addressed limitations of conventional diffusion models, these techniques typically involve supervised-learning frameworks that require large amounts of clean training data to successfully produce robust estimates of metrics and are typically constrained to diffusion-specific models. For this research, we propose DL techniques that address some of these challenges. The contributions made by this dissertation involve a Self-Supervised with Fine-Tuning DL pipeline that can produce robust DTI metrics for an accelerated acquisition of DWIs and reduces the need of a large volume of clean training data. We also demonstrate a Generative Diffusion Deep Learning model that can effectively leverage uncertainty to generalize well to the underlying distribution of tensor model metrics in DTI and DKI and bypasses the need for diffusion-model fits. We also present a DL pipeline, AcceleraTed deep-LeArning for model-free and multi-Shell (ATLAS) DWI, that can predict a full acquisition of DWIs across multiple shells, given an accelerated acquisition in one shell or multiple shells. This enables for the potential for robust DTI tensor estimates, overcoming the requirement for large amounts of clean training labels, and eliminates the constraint of diffusion-specific models, which introduces the exciting potential to obtain diffusion metrics that more accurately delineate white-matter tracts.
일반주제명  
Medical imaging
일반주제명  
Neurosciences
일반주제명  
Biomedical engineering
키워드  
Deep learning
키워드  
Diffusion Kurtosis Imaging
키워드  
Diffusion Magnetic Resonance Imaging
키워드  
Diffusion Tensor Imaging
키워드  
Self-supervision
기타저자  
The University of Arizona Electrical & Computer Engineering
기본자료저록  
Dissertations Abstracts International. 86-03B.
전자적 위치 및 접속  
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MARC

 008250123s2024        us                              c    eng  d
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■006m          o    d                
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■020    ▼a9798384039891
■035    ▼a(MiAaPQ)AAI31556136
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a616
■1001  ▼aMartin,  Phillip.
■24510▼aDevelopment  of  Novel  Deep  Learning  Techniques  for  Accelerated  Diffusion  MRI
■260    ▼a[Sl]▼bThe  University  of  Arizona▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a104  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-03,  Section:  B.
■500    ▼aAdvisor:  Bilgin,  Ali.
■5021  ▼aThesis  (Ph.D.)--The  University  of  Arizona,  2024.
■520    ▼aDiffusion  Magnetic  Resonance  Imaging  (dMRI)  is  an  imaging  modality  of  MRI  that  features  a  non-invasive  technique  for  qualitatively  and  quantitatively  characterizing  microstructural  characteristics  in  tissue.  This  is  achieved  by  dMRI  being  sensitive  to  the  Brownian  motion  of  water  molecules  in  tissue  measured  over  an  applied  magnetic  field  gradient.  The  directional  orientations  of  motion  of  water  molecules  are  estimated  over  an  isotropic  gaussian  propagator.  This  capability  enables  dMRI  to  achieve  resolution  of  microstructural  features  of  up  to  2-3  orders  of  magnitude  below  the  resolution  limit  of  conventional  MRI.  However,  delineation  of  resolving  features  and  characteristics  with  high  degrees  of  architectural  specificities  requires  making  underlying  assumptions  of  the  underlying  diffusion  signals  and  invoking  appropriate  mathematical  and  computational  solutions  to  achieve  this.  One  computational  technique  of  interest  for  dMRI  is  Diffusion  Tensor  Imaging  (DTI).  DTI  enables  anisotropic  measurements  to  be  acquired  by  fitting  multiple  diffusion-weighted  images  (DWIs)  to  a  tensor,  enabling  3D  reconstructions  of  microstructural  features  of  the  brain,  including  the  ability  to  reconstruct  trajectories  of  white-matter  tracts.  Some  of  the  challenges  of  performing  DTI  in  routine  clinical  and  research  studies  include  long  data  acquisition  times  required  to  obtain  sufficiently  large  number  of  DWIs  for  outputting  robust  tensor  estimates.  This  involves  long  scan  times  and  typically  introduces  undesired  image  distortions  and  artifacts  that  deteriorate  image  quality.  In  addition,  DTI  has  limitations  in  accurately  delineating  more  complex  microstructural  features  in  white-matter  tracts.  Models  in  Diffusion  Kurtosis  Imaging  (DKI)  and  Constrained  Spherical  Deconvolution  (CSD)  offer  improvements  over  DTI.  However,  these  models  require  considerably  more  data  than  DTI  and  are  generally  more  complex  to  implement.  Although  some  prior  deep  learning  (DL)  techniques  have  addressed  limitations  of  conventional  diffusion  models,  these  techniques  typically  involve  supervised-learning  frameworks  that  require  large  amounts  of  clean  training  data  to  successfully  produce  robust  estimates  of  metrics  and  are  typically  constrained  to  diffusion-specific  models.  For  this  research,  we  propose  DL  techniques  that  address  some  of  these  challenges.  The  contributions  made  by  this  dissertation  involve  a  Self-Supervised  with  Fine-Tuning  DL  pipeline  that  can  produce  robust  DTI  metrics  for  an  accelerated  acquisition  of  DWIs  and  reduces  the  need  of  a  large  volume  of  clean  training  data.  We  also  demonstrate  a  Generative  Diffusion  Deep  Learning  model  that  can  effectively  leverage  uncertainty  to  generalize  well  to  the  underlying  distribution  of  tensor  model  metrics  in  DTI  and  DKI  and  bypasses  the  need  for  diffusion-model  fits.  We  also  present  a  DL  pipeline,  AcceleraTed  deep-LeArning  for  model-free  and  multi-Shell  (ATLAS)  DWI,  that  can  predict  a  full  acquisition  of  DWIs  across  multiple  shells,  given  an  accelerated  acquisition  in  one  shell  or  multiple  shells.  This  enables  for  the  potential  for  robust  DTI  tensor  estimates,  overcoming  the  requirement  for  large  amounts  of  clean  training  labels,  and  eliminates  the  constraint  of  diffusion-specific  models,  which  introduces  the  exciting  potential  to  obtain  diffusion  metrics  that  more  accurately  delineate  white-matter  tracts.
■590    ▼aSchool  code:  0009.
■650  4▼aMedical  imaging
■650  4▼aNeurosciences
■650  4▼aBiomedical  engineering
■653    ▼aDeep  learning
■653    ▼aDiffusion  Kurtosis  Imaging
■653    ▼aDiffusion  Magnetic  Resonance  Imaging
■653    ▼aDiffusion  Tensor  Imaging
■653    ▼aSelf-supervision
■690    ▼a0574
■690    ▼a0800
■690    ▼a0541
■690    ▼a0317
■71020▼aThe  University  of  Arizona▼bElectrical  &  Computer  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g86-03B.
■790    ▼a0009
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163828▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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