Jekyll2022-06-20T04:05:06-07:00https://annamenacher.github.io/feed.xmlAnna MenacherDPhil StudentAnna Menacheranna.menacher@stats.ox.ac.ukOHBM: Want to hear more about Bayesian methods for analysing lesions?2022-06-20T00:00:00-07:002022-06-20T00:00:00-07:00https://annamenacher.github.io/posts/2021/blog-post<p><img src="https://github.com/annamenacher/website_files/blob/main/poster_image_for_webiste.png?raw=true" alt="alt text" /></p>
<p>I’m super excited to present some new additions that we made to BLESS (= Bayesian Lesion Estimation with a Structured Spike-and-Slab Prior) this year at OHBM 2022. With BB-BLESS (= Bayesian Bootstrap - BLESS), we add some really cool features to the principled analysis of lesions with Bayesian spatial regression modelling. Here is a list of a few of BLESS’s features:</p>
<ul>
<li>Scales to really large datasets.</li>
<li>Handles many covariates and produces a spatial parameter map for each of them.</li>
<li>Bayesian shrinkage priors to do variable selection for each covariate and voxel.</li>
<li>Fast inference methods via optimization rather than MCMC (Variational Inference + Bayesian Bootstrap methods).</li>
<li>Uncertainty estimates of any spatial statistics, such as cluster size.</li>
<li>New reliability measures of cluster size via approximate posterior sampling.</li>
<li>UK Biobank application with 40,000 subjects and 50,000 voxel locations.</li>
</ul>
<p>If any of this sounds interesting, then please come by my poster #WTh036 titled “Bayesian Bootstrap Uncertainty Quantification for Spatial Lesion Regression Modelling” on Wednesday and Thursday (22nd and 23rd of June, 2022) between 1:45PM - 2:45PM GMT +1 and say hi! Always happy to arrange an online chat or a meet up at a different time during OHBM too. Just get in touch on <a href="https://twitter.com/MenacherAnna">Twitter</a> or via <a href="mailto:anna.menacher@stats.ox.ac.uk">Email</a> :)</p>
<p>Here is a link to the full <a href="https://drive.google.com/file/d/1pGI1iBrShxZKuTQy94Oilh_CpvH-rpPw/view?usp=sharing">OHBM 2022 Poster</a>.</p>Anna Menacheranna.menacher@stats.ox.ac.ukConferences: OHBM and ISBA2021-06-14T00:00:00-07:002021-06-14T00:00:00-07:00https://annamenacher.github.io/posts/2021/blog-post<p>I’ve been making some progress within the last year on a scalable Bayesian lesion regression model which we have very originally named BLESS (= Bayesian Lesion Estimation with a Structured Spike-and-Slab) :) With BLESS, we hope to add to the methods development in the area of brain lesion mapping which aims to identify biomarkers associated with lesion incidence. Through that we hope to gain a better understanding of the aging brain and the neurodegenerative disease, multiple sclerosis.</p>
<p>I’m also very excited to present our work at two conferences this year. Once, to the neuroimaging community at OHBM, which stands for Organisation for Human Brain Mapping, where I am very proud to have received a merit abstract award for our contribution to methods development in the are of brain lesion mapping. Moreover, I am looking forward to being able to present our work at ISBA (= International Society for Bayesian Analysis) to a statistics audience!</p>Anna Menacheranna.menacher@stats.ox.ac.ukI’ve been making some progress within the last year on a scalable Bayesian lesion regression model which we have very originally named BLESS (= Bayesian Lesion Estimation with a Structured Spike-and-Slab) :) With BLESS, we hope to add to the methods development in the area of brain lesion mapping which aims to identify biomarkers associated with lesion incidence. Through that we hope to gain a better understanding of the aging brain and the neurodegenerative disease, multiple sclerosis.Almost a year of CDT, officially starting the PhD.2020-04-22T00:00:00-07:002020-04-22T00:00:00-07:00https://annamenacher.github.io/posts/2020/blog-post<p>Exactly a week ago I have finished my second mini-project of the StatML CDT. Now I am officially starting my PhD. However, nothing much will change. I am still supervised by Thomas Nichols, Habib Ganjgahi and Chris Holmes where I am part of the Statistical Neuroimaging Group at the Oxford Big Data Institue. I am very much looking forward to the research I will get to do in the field of neuroimaging, particularly regaring neurodegenerative diseases, such as multiple sclerosis. This website will document some of the milestones along the way of pursuing research in statistics and brain imaging.</p>Anna Menacheranna.menacher@stats.ox.ac.ukExactly a week ago I have finished my second mini-project of the StatML CDT. Now I am officially starting my PhD. However, nothing much will change. I am still supervised by Thomas Nichols, Habib Ganjgahi and Chris Holmes where I am part of the Statistical Neuroimaging Group at the Oxford Big Data Institue. I am very much looking forward to the research I will get to do in the field of neuroimaging, particularly regaring neurodegenerative diseases, such as multiple sclerosis. This website will document some of the milestones along the way of pursuing research in statistics and brain imaging.