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Improving Arterial Spin Labeling in Clinical Application With Deep Learning
Improving Arterial Spin Labeling in Clinical Application With Deep Learning
Improving Arterial Spin Labeling in Clinical Application With Deep Learning

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211153037
ISBN  
9798346740179
DDC  
610
저자명  
Shou, Qinyang.
서명/저자  
Improving Arterial Spin Labeling in Clinical Application With Deep Learning
발행사항  
[Sl] : University of Southern California, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
122 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-05, Section: B.
주기사항  
Advisor: Wang, Danny.
학위논문주기  
Thesis (Ph.D.)--University of Southern California, 2024.
초록/해제  
요약Arterial spin labeling (ASL) is a magnetic resonance imaging (MRI) technique that can measure human cerebral blood flow (CBF) non-invasively. However, clinical application of this technique remains challenging due to the intrinsic low signal-to-noise ratio (SNR) and long scan time. Also, heterogeneity of ASL imaging protocols across vendor platforms make quantification not reliable. Traditional methods of denoising usually assumes an image models and/or noise characteristics, which may not well represent the real data. Deep Learning (DL)-based models can learn the underlying patterns purely from real data. Recent developments of DL in image processing and image generation provide powerful tools to improve clinical applications of medical imaging, such as improving image quality, reducing time for image acquisition, etc. However, while a handful studies have demonstrated the feasibility of DL applications on ASL, there remain large gaps in the reliable application of DL methods for improving the clinical use of ASL on multiple vendor platforms with different imaging protocols (e.g., single-delay and multi-delay). The purpose of this work is to adapt, optimize and apply some of the latest DL techniques, including Transformer and diffusion model to improving the clinical translation of ASL by improving the image quality and/or reduce scan time, and generating the missing modality to enable CBF quantification to improve standardization cross vendors for the Alzheimer's Disease Neuroimaging Initiative (ADNI) dataset.There are three specific aims in this study. In the first aim, a flexible Transformer-based DL denoising scheme will be developed and evaluated for 3D ASL to improve SNR and/or reduce scan time for both single-delay and multi-delay ASL data. Our hypothesis is that with the completion of aim 1, we will be able to improve the image quality for ASL acquired from multiple vendors with the trained model without introducing bias in quantification of cerebral blood flow (CBF) and/or arterial transit time (ATT). In the second aim, the proposed DL framework and the trained model will be adapted to a high-resolution pediatric multi-delay ASL dataset for perfusion imaging of pediatric choroid plexus. Since there are no reference images for this cutting edge application, some self-supervised learning techniques will be explored. We will compare the performance of the proposed deep learning method with state-of-the-art conventional denoising method like total generalized variation (TGV). Our hypothesis is that with completion of aim 2, the proposed deep learning method will show better performance than the traditional method, both improving image quality and the test-retest reliability for pediatric choroid plexus perfusion imaging.In the third aim, generative diffusion model will be applied to generating the M0 from the control image for Siemens 3D pulsed ASL (PASL) scans in the ADNI-3 dataset, where M0 is not acquired. The generated M0 can be used to quantify CBF for analysis of CBF variations among subjects with normal cognition, mild cognitive impairment (MCI) and AD. This can help resolve the heterogeneity of different type of ASL scans to standardize quantification of CBF in the AD dataset. Our hypothesis is that with the completion of aim 3, Siemens 3D PASL scans in the ADNI-3 dataset can be used to quantify CBF with the acquired control images and the generated M0. Analysis of CBF data from different MR vendors will reveal similar characteristic of deficits in quantitative CBF in MCI and AD subjects compared to normal, which can show better differentiation between AD and normal people compared to using non-standardized perfusion images.In conclusion, with the completion of the three specific aims, we will show that latest DL methods such as Transformers and diffusion models have the potential to improve ASL in clinical applications by enhancing the image quality and better standardization.
일반주제명  
Biomedical engineering
키워드  
Arterial spin labeling
키워드  
Clinical application
키워드  
Deep learning
기타저자  
University of Southern California Biomedical Engineering
기본자료저록  
Dissertations Abstracts International. 86-05B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■5021  ▼aThesis  (Ph.D.)--University  of  Southern  California,  2024.
■520    ▼aArterial  spin  labeling  (ASL)  is  a  magnetic  resonance  imaging  (MRI)  technique  that  can  measure  human  cerebral  blood  flow  (CBF)  non-invasively.  However,  clinical  application  of  this  technique  remains  challenging  due  to  the  intrinsic  low  signal-to-noise  ratio  (SNR)  and  long  scan  time.  Also,  heterogeneity  of  ASL  imaging  protocols  across  vendor  platforms  make  quantification  not  reliable.  Traditional  methods  of  denoising  usually  assumes  an  image  models  and/or  noise  characteristics,  which  may  not  well  represent  the  real  data.  Deep  Learning  (DL)-based  models  can  learn  the  underlying  patterns  purely  from  real  data.  Recent  developments  of  DL  in  image  processing  and  image  generation  provide  powerful  tools  to  improve  clinical  applications  of  medical  imaging,  such  as  improving  image  quality,  reducing  time  for  image  acquisition,  etc.  However,  while  a  handful  studies  have  demonstrated  the  feasibility  of  DL  applications  on  ASL,  there  remain  large  gaps  in  the  reliable  application  of  DL  methods  for  improving  the  clinical  use  of  ASL  on  multiple  vendor  platforms  with  different  imaging  protocols  (e.g.,  single-delay  and  multi-delay).  The  purpose  of  this  work  is  to  adapt,  optimize  and  apply  some  of  the  latest  DL  techniques,  including  Transformer  and  diffusion  model  to  improving  the  clinical  translation  of  ASL  by  improving  the  image  quality  and/or  reduce  scan  time,  and  generating  the  missing  modality  to  enable  CBF  quantification  to  improve  standardization  cross  vendors  for  the  Alzheimer's  Disease  Neuroimaging  Initiative  (ADNI)  dataset.There  are  three  specific  aims  in  this  study.  In  the  first  aim,  a  flexible  Transformer-based  DL  denoising  scheme  will  be  developed  and  evaluated  for  3D  ASL  to  improve  SNR  and/or  reduce  scan  time  for  both  single-delay  and  multi-delay  ASL  data.  Our  hypothesis  is  that  with  the  completion  of  aim  1,  we  will  be  able  to  improve  the  image  quality  for  ASL  acquired  from  multiple  vendors  with  the  trained  model  without  introducing  bias  in  quantification  of  cerebral  blood  flow  (CBF)  and/or  arterial  transit  time  (ATT).  In  the  second  aim,  the  proposed  DL  framework  and  the  trained  model  will  be  adapted  to  a  high-resolution  pediatric  multi-delay  ASL  dataset  for  perfusion  imaging  of  pediatric  choroid  plexus.  Since  there  are  no  reference  images  for  this  cutting  edge  application,  some  self-supervised  learning  techniques  will  be  explored.  We  will  compare  the  performance  of  the  proposed  deep  learning  method  with  state-of-the-art  conventional  denoising  method  like  total  generalized  variation  (TGV).  Our  hypothesis  is  that  with  completion  of  aim  2,  the  proposed  deep  learning  method  will  show  better  performance  than  the  traditional  method,  both  improving  image  quality  and  the  test-retest  reliability  for  pediatric  choroid  plexus  perfusion  imaging.In  the  third  aim,  generative  diffusion  model  will  be  applied  to  generating  the  M0    from  the  control  image  for  Siemens  3D  pulsed  ASL  (PASL)  scans  in  the  ADNI-3  dataset,  where  M0  is  not  acquired.  The  generated  M0  can  be  used  to  quantify  CBF  for  analysis  of  CBF  variations  among  subjects  with  normal  cognition,  mild  cognitive  impairment  (MCI)  and  AD.  This  can  help  resolve  the  heterogeneity  of  different  type  of  ASL  scans  to  standardize  quantification  of  CBF  in  the  AD  dataset.  Our  hypothesis  is  that  with  the  completion  of  aim  3,  Siemens  3D  PASL  scans  in  the  ADNI-3  dataset  can  be  used  to  quantify  CBF  with  the  acquired  control  images  and  the  generated  M0.  Analysis  of  CBF  data  from  different  MR  vendors  will  reveal  similar  characteristic  of  deficits  in  quantitative  CBF  in  MCI  and  AD  subjects  compared  to  normal,  which  can  show  better  differentiation  between  AD  and  normal  people  compared  to  using  non-standardized  perfusion  images.In  conclusion,  with  the  completion  of  the  three  specific  aims,  we  will  show  that  latest  DL  methods  such  as  Transformers  and  diffusion  models  have  the  potential  to  improve  ASL  in  clinical  applications  by  enhancing  the  image  quality  and  better  standardization.
■590    ▼aSchool  code:  0208.
■650  4▼aBiomedical  engineering
■653    ▼aArterial  spin  labeling
■653    ▼aClinical  application
■653    ▼aDeep  learning
■690    ▼a0541
■690    ▼a0800
■71020▼aUniversity  of  Southern  California▼bBiomedical  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g86-05B.
■790    ▼a0208
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164729▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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