Anirudh Choudhary



I am a first year PhD student in Electrical and Computer Engineering at UIUC working with Professor Ravishankar Iyer. I am a part of the DEPEND group at the Coordinated Sciences Lab. Previously, I completed my Masters in Computational Science and Engineering at Georgia Tech, where I was a researcher at Biomedical Informatics Laboratory advised by Professor May Wang. My research focused on robust policy learning for clinical decision-making using electronic health records. Additionally, I also got an opportunity to work with Professor Jaydev Desai at RoboMed Lab on image-guided surgery.

Earlier, I did my MBA from IIM Calcutta, and completed my undergraduate studies at IIT Kharagpur, where I did my thesis with Prof. Ajoy Kumar Ray on texture-based oral cancer prediction using histopathology images. While at IIT Kharagpur, I pursued summer internships with Prof. Christos Davatzikos (University of Pennsylvania) and Prof. Paolo Fiorini (University of Verona). I have five years of professional experience in developing machine learning models for e-commerce and retail consumer data analysis.

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Affiliations

                       
IIT Kharagpur
2005-2010
Altair Robotics Lab (UVerona)
Summer 2008
SBIA (UPenn)
Summer 2009
IIM Calcutta
2011-2013
Georgia Tech
2018-2020
UIUC
2020-present

Research Interests

My research interests lie broadly in Image Processing and Machine Learning with a focus on Biomedical Data Analysis. Some of my recent projects include:
Modeling pathology progression during Alzheimer's disease
Developing an RL-based model for predicting cognition trajectories during Alzheimer's disease.
Robust Counterfactual Learning
Designing robust off-policy bandit/RL algorithms to tackle model uncertainity and data heterogeneity in electronic health records (Warfarin dosing and Sepsis treatment).
Medical Image Processing
Surgical tool-tracking using X-Ray images for image-guided surgery
Unsupervised/self-supervised deep representation learning for analyzing semantic similarity in histopathology images.

Industry Experience

               
Sabre Corporation
2010-2011
EXL Analytics
2013-2016
Loyalty Partner
(AmEx subsidiary)
2016-2017
Mastercard Data
& Services
2017-2018

Research Publications

Pose-aware C-Arm Calibration and Image Distortion Correction for Guidewire Tracking and Image Reconstruction
Florian Heemeyer*, Anirudh Choudhary*, Jaydev P. Desai
IEEE International Symposium on Medical Robotics (Georgia Tech), 2020  

Image intensifiers, also known as C-arms, are important and low-cost tools for surgeons to guide minimally-invasive procedures. However, image intensifiers suffer from several image distortions, which can be misleading during an automated minimally-invasive surgery. We propose a combination of camera-based tracking system and calibration grid to perform accurate distortion correction.

Learning to Evaluate Color Similarity for Histopathology Images using Triplet Networks
Anirudh Choudhary, Hang Wu, Li Tong, May D. Wang
ACM International Conference on Bioinformatics, Computational Biology and Health Informatics, 2019   (Long Oral) (Invited for JBHI Special Issue)

Inspired by the effectiveness of deep neural networks in evaluating perceptual similarity of natural images, in this paper, we propose a representation learning approach using triplet network for evaluating color-based perceptual similarity for whole slide images.

Texture based segmentation of epithelial layer from oral histological images
M. Krishnan, Anirudh Choudhary, Chandan Chakraborty, Ajoy Kumar Ray, R. Paul
Micron Journal (Elsevier), 2011

A novel texture based segmentation algorithm for better delineation of the epithelial layer from histological images using Gabor Filter and multistep region-merging using watershed-generated superpixels.

Textural characterization of histopathological images for oral sub-mucous fibrosis detection
M. Krishnan, Pratik Shah, Anirudh Choudhary, Chandan Chakraborty, R. Paul, Ajoy Kumar Ray
Tissue Cell Journal (Elsevier), 2011

Evaluating statistical and spectral texture features of epithelial layer in oral whole slide images for cancer classification using Support Vector Machines.

An Entropy Based Multi-Thresholding Method for Semi-Automatic Segmentation of Liver Tumors
Anirudh Choudhary Nicola Moretto, Francesca P. Ferrarese, Giulia A. Zamboni
Workshop on 3D Segmentation in the Clinic: Liver Tumor Segmentation Challenge, MICCAI, 2008

A semi-automatic liver tumor segmentation technique using cross-entropy minimization based thresholding and level sets.


(*equal contribution)

Articles

Advancing Medical Imaging Informatics by Deep Learning-Based Domain Adaptation
Anirudh Choudhary*, Li Tong*, Yuanda Zhu, May D. Wang
IMIA Yearbook of Medical Informatics 2020

Presentations/Talks

Bootstrapping-based robust offline counterfactual learning in clinical settings (CSL Student Conference 2020)


Academic Achievements

NSF Travel Grant and Georgia Tech Student Travel Award - ACM-BCB Conference 20192019
Research Assistantships with full tuition support throughout graduate studies at Georgia Tech2018-20
99.61 percentile in Common Admission Test for admission to Indian Institutes of Management2011
Masters research scholarship awarded by Government of India at IIT Kharagpur2010
Research assistantships during internships at University of Verona and University of Pennsylvania2009
All India Rank 68 in IIT-JEE Prelims Examination and 507 in All India Engineering Entrance Examination2005
CBSE Merit Certificate in Mathematics for being among top 0.01% of students at a national level in Std 12th2004
Secured 5th rank in Regional Mathematical Olympiad and participated in Indian National Mathematics Olympiad 2002

Professional/ Extracurricular Achievements

Business Excellence Award and Quarterly Best Performer Award at Loyalty Partner, India2017
Among top 5% performers at EXL Analytics - Rated 'Exceeds Expectations' 2015
Runners-up in Procter and Gamble’s marketing strategy case-study competition, IIM Calcutta2013
Killer Tech Award and High Five Award for being among top 5 performers at Sabre Corporation2010
Best Outgoing Technology Award for contributions to intra-institute technical events at IIT Kharagpur2010
Winner at Envision, a national-level product design competition at Entrepreneurship Summit, IIT Kharagpur2010

Courses

Computer Vision, Advanced Computer Vision
Graphical Models, Computational Data Analysis, Artificial Intelligence, Machine Learning with Limited Supervision, Computational Inference, Random Processes
Deep Learning, Reinforcement Learning
CSE Algorithms, Numerical Linear Algebra, Modeling & Simulation

Academic Projects

Simulation of HIV infection using mean-field approach and antiretroviral drug-dosing using reinforcement learning (Report) | Modeling & Simulation
Guidewire detection and 3D-Reconstruction for X-Ray image-guided surgery (Report) | Special Problem
Empirical analysis of Ordered Neurons based LSTM(ON-LSTM) on language modeling tasks and benchmarking against vanilla LSTM and AWD-LSTM on toxic comment identification task. (Report) | Deep Learning
Adversarial Domain Adaptation in Videos using spatio-temporal features for activity recognition (Video, Slides) | Machine Learning with Limited Supervision
Evaluating heuristic and local search-basedapproaches for Traveling Salesman Problem (Report, Code) | CSE Algorithms

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