Principal Investigator
Aaryani Tipirneni-Sajja, PhD
Dr. Aaryani Tipirneni-Sajja, is an assistant professor in the Department of Biomedical Engineering at the University of Memphis. Dr. Sajja is a biomedical scientist with expertise in developing quantitative magnetic resonance imaging and spectroscopy techniques that will noninvasively identify disease biomarkers, enable early diagnosis and guide response to therapy. Dr. Sajja has secured research funding as a Principal Investigator from National Institute of Health (Trailblazer Award) and National Science Foundation (CAREER Award) and also received several internal and external university grants. She has published 25 journal articles with 1500+ citations, over 45 conference abstracts and 1 book chapter in this field. She is the recipient of the 2022 Outstanding Faculty Teaching Award and 2023 Outstanding Faculty Research Award from the College of Engineering in recognition of her dedicated teaching and research efforts. Dr. Sajja has utmost interests in empowering women and enriching student education in STEM. She has served as K-12 Outreach Chair for SWE (2022, 2023) and organized several STEM activities for K-12 and public.
Office: 321C Engineering Technology Building
PHONE: (901) 678-3772
Graduate Students
Utsav Shrestha
Utsav is a PhD student at the University of Memphis studying biomedical engineering. He completed his Masters in Computer Science from the University of Memphis in 2020. He joined MRIS lab in Fall 2019 for pursuing his Masters Thesis. He enjoys programming and aims to aid technical advancement in biomedical field. His research is focused on diagnostic imaging using MRI. His research interests include fat and iron quantification, image processing, simulation, machine learning and deep learning.
Hayden Tyler Johnson
Hayden is a PhD student pursuing PhD in Biomedical Engineering. He joined the lab in Summer 2019 after graduating with his Bachelor’s degree in Biomedical Engineering from the University of Memphis in Spring 2019. His work primarily focuses on NMR-based metabolomics and computational methods for quantitative NMR. Research interests include NMR spectroscopy, metabolomics, quantitative MRI, and machine learning. He also enjoys deep learning, foraging, mycology, and soccer.
Juan Esparza
Juan is a MS student at the University of Memphis. He joined the lab in the spring of 2021 as an undergraduate researcher to work on hepatic steatosis morphological characterization and fat quantification as part of the summer Honors Summer Research Fellowship. He has conitnued in the lab as a graduate student and is working on correlating sarcopenia and muscle fatty infiltration with frailty in liver cirrhosis using deep learning.
Undergraduate Students
Lara Van Heerden
Lara is an undergraduate student at the University of Memphis pursuing a degree in Biomedical Engineering with a minor in Chemistry. She is an international student from South Africa and will be graduating in 2024 and plans on attending medical school. She is interested in the intersection of engineering and healthcare, with a particular attraction to the field of medical imaging and diagnostics. Currently, Lara is actively involved in a research project that aims to develop precise methods using MRI to measure fat and iron levels in the body, which can provide valuable insights into various diseases and conditions. Beyond her academic pursuits, Lara maintains an active lifestyle and enjoys gardening in her free time.
Darby Grace Eime
Darby is an undergraduate student at the University of Memphis pursuing a degree in Biomedical Engineering. She will be graduating in Fall of 2024 and aims to enter the medical device industry. She joined the lab in the Winter of 2023 and helps collaborate with correlating sarcopenia and muscle frailty within the lumbar paraspinal muscles.
Abdulla Obadat
Abdulla is a biomedical engineering undergraduate also majoring in biology. He began his graduate school through the University of Memphis' ABM program starting in Spring 2023. He is currently working under Dr. Sajja and Mr. Hayden Johnson in research in NMR-based metabolomics/computational methods. His research focuses on the effects of varying levels of fats in diets on muscle/organ tissues by measuring metabolites using NMR spectroscopy. As for hobbies, he enjoys reading and visiting state parks in his spare time.
Laila Obadat
Laila Obadat is an undergraduate student studying Biomedical Engineering at the University of Memphis and will be graduating in the Spring of 2024. She is enrolled in the Accelerated Bachelors/Master (ABM) Joint Graduate Program and will be continuing her graduate studies at the University of Memphis and aims to complete her Master’s degree in the Spring of 2025. She began working in Dr. Sajja’s MRIS lab on various projects in the Summer of 2023 and is currently working on her own research. She is working on NMR-based metabolomics/computational methods to study the influences of dietary lifestyle in the skeletal muscle and other metabolically active tissues. Her interests include studying the physiology of the human body and working on external orthoses for tremor patients.
Alumni
Graduate Students
Prasiddhi Neupane
Prasiddhi completed her MS in Biomedical Engineering from the University of Memphis in Spring 2023. She is an international student from Nepal and she graduated from the University of Mississippi with a bachelor’s in Biomedical Engineering in May 2021. Prasiddhi joined the MRIS lab in the summer of 2021. Her research interests include fat and iron quantification, simulations, and design and evaluation of MRI phantoms.
Sarah Caroline Brasher
Sarah completed her master's degree in biomedical engineering from the University of Memphis in Spring 2023. After graduating with a biochemistry degree from Christian Brothers University in May 2020, she joined up with the lab in June 2021. Her research focused on quantification of fat and iron using MRI and NMR spectroscopy, and her research interests involve metabolomic processes, quantitative MRI, and bioinformatics. Based on her academic and research achievements, she was awarded the Outstanding Graduate Student award (2023). She also enjoys reading, gaming, and drawing.
Undergraduate Students
Thomas Christoper Yates
Thomas completed his undergraduate degree in biomedical engineering in 2023 and plans to attend graduate school. He enjoys working with technology in order to solve various medical issues. Research interests include metabolite quantification using NMR and spectroscopy and cancer research.
Beida Copitzi Segura-Antunez
Beida completed her Bachelors' degree in Biomedical Engineering in 2022. She joined the lab in Summer 2022. Her research was to study the effects of high fat/sugar diet on muscle tissue by quantifying lipid/aqueous metabolite using NMR spectra of the extracted muscle tissue samples. She enjoys photography, reading, and hiking.
Annie Eangear Chan
Annie completed her undergraduate degree in biomedical engineering in 2022. She plans to attend graduate school after completing her bachelor's degree. She joined the research lab in Summer 2022 focusing on MRI techniques to quantify iron and fat. In her free time, she enjoys playing soccer, hiking, and gardening.
William Chase Guyton
Junior, Double major in Biomedical Engineering and Mathematics
William worked on a project entitled ‘Hepatic Iron Modeling using Monte Carlo Simulations’
as part of Honors Summer Research Fellowship in 2019. The goal of this project was to develop hepatic iron overload models using
Monte Carlo simulations to investigate the contribution of size and distribution of
iron deposits on MRI signal relaxation. William presented the findings at 2019 Works
in Progress Symposium at the University of Memphis and his work was selected for oral
presentation at 2020 National Conference on Undergraduate Research (NCUR).
Shawyon Chase Rohani
Chase worked on a project in collaboration with Dr. Morin, body radiologist in the Diagnostic Imaging at St. Jude Children’s Research Hospital. He started this project as part of the St. Jude DI - UM BME internship in Spring 2020. The goal of this project was to investigate the performance of a free-breathing 3D Radial Dixon VIBE technique for quantification of hepatic iron content and validate the findings with 3D Cartesian Dixon VIBE and published 2D GRE biopsy calibration techniques. Chase recently graduated from the University of Memphis in May 2020 with a degree in biomedical engineering and plans to begin medical school in July 2021.
Gary Allen Leedom
Gary joined the lab in his senior year of pursuing Bachelors' Degrees in Biomedical Engineering and Physics with Minors in Biology and Chemistry. He planned to pursue medical school or graduate school after his graduation in Fall 2021. His research focused on studying the impact of high fat diet and intermittent fasting on fatty acids found in the adipose tissue using NMR spectra of the extracted lipid layers.
Collaborators
Marie van der Merwe, PhD
Associate Professor College of Health Sciences
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Melissa Puppa, PhD
Associate Professor College of Health Sciences
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Brandt Pence, PhD
Associate Professor College of Health Sciences
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Eddie Jacobs, PhD
Professor & Undergraduate Coordinator Electrical and Computer Engineering
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Sanjaya Kumar Satapathy, MD
Medical Director of Liver Transplantation Northwell Health
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Cara E. Morin, MD, PhD
Department of Radiology Cincinnati Children's Hospital Medical Center
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Zachary R. Abramson, MD, DMD
Diagnostic Imaging St. Jude Children's Research Hospital
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Gavin M. Bidelman, PhD
Professor Indiana University Bloomington
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