Anissa Abi-Dargham, MDAnissa Abi-Dargham, MD
Professor and Chair, Department of Psychiatry and Behavioral Health
Lourie Endowed Chair in Psychiatry
SUNY Distinguished Professor
Director, Multi-Modal Translational Imaging Lab
Associate Dean and Associate Vice President,  Clinical and Translational Science
Principal Investigator, Long Island Network for Clinical and Translational Science ( LINCATS)


Dr. Abi-Dargham was born in Beirut, Lebanon, where she went to Medical School in Saint Joseph’s University. She moved to the US in 1985, did her residency at the University of Tennessee in Memphis, TN, followed by a research fellowship at the National Institute for Mental Health. She then joined the Faculty at Yale University and moved to Columbia University in 1996, where she spent most of her career. She moved to Stony Brook University in June 2016 to head the Multi Modal Imaging lab. She also took on the role of Vice Chair for Research for the Department of Psychiatry.

She is an expert in areas of molecular imaging, pharmacology, schizophrenia, addiction, and translational science, and is the Principal Investigator of the Long Island Network for Clinical and Translational Science. She uses Positron Emission Tomography imaging to study the neurobiology of these disorders. Her research has resulted in seminal findings describing the complex alterations of dopamine transmission in schizophrenia and their relationship to clinical symptoms, cognition and response to treatment. She is Associate Editor for Neuropsychopharmacology, Deputy Editor for Biological Psychiatry, Past President of the Brain Imaging Council for SNM, and Past President of the American College of Neuropsychopharmacology. She serves on the scientific boards of Schizophrenia International Research Society, the Brain and Behavior Research Foundation, and Research Forum, she is also a member of the NIMH Board of Scientific Counselors. Dr Abi-Dargham is a member of the National Academy of Medicine.

View Dr. Abi-Dargham's bio on the Brain & Behavior Research Foundation website  here.

Anissa’s Video Links:



Mark Slifstein, PhDMark Slifstein, PhD
Professor of Psychiatry and Director of the PET Imaging Center

Dr. Slifstein’s expertise is in PET pharmacokinetics and quantitative methodology in brain imaging. He has collaborated with Dr. Abi-Dargham for 18 years, as director of PET data analysis in her lab. More recently, he has become involved in multimodal imaging efforts and served as Director of the MRI Research Unit at the New York State Psychiatric Institute. He has received research funding from various pharmaceutical companies and charitable foundations. He has published more than 100 research articles on PET imaging. Dr. Slifstein is an Editorial Board member of Neuropsychopharmacology and Journal of Cerebral Blood Flow and Metabolism and has served on the Scientific Advisory Committees for Neuroreceptor Mapping and BrainPET.



Roberto B. Gil, MDRoberto B. Gil, MD
Visiting Associate Professor of Psychiatry

Dr. Gil was born in Seville, Spain, and completed his medical school degree at the University of Seville Medical School, working as a general practitioner in Spain for a few years before coming to the US to specialize in psychiatry. He completed his residency at SUNY Downstate in Brooklyn, and fellowships in Consultation Liaison Psychiatry (SUNY Downstate) and Psychopharmacology (West Haven VAMC and Yale University.) Since then he has focused his work in clinical and brain imaging studies in schizophrenia, specialized in the diagnostic evaluation and clinical assessment, and treatment, of subjects participating in research protocols. He has been the director of clinical research units at the West Haven VAMC/Yale University and also New York State Psychiatry Institute/Columbia University. As a member of the MMTI lab at SUNY Stony Brook he is now organizing an outpatient schizophrenia research clinic for subjects participating in brain imaging studies.



Jared X. Van Snellenberg, PhDJared X. Van Snellenberg, PhD
Assistant Professor of Psychiatry

Dr. Van Snellenberg was born in Vancouver, Canada, and completed his undergraduate work at Simon Fraser University. He obtained his PhD in Psychology from Columbia University and completed postdoctoral training at Columbia University Medical Center and the New York State Psychiatric Institute, specializing in functional Magnetic Resonance Imaging approaches to the cognitive neuroscience of working memory and psychotic symptoms of schizophrenia. His current research focuses on the development of cutting-edge data analytic approaches for high resolution multiband fMRI data, and applying these methods to translational neuroscience studies of patients with psychotic illnesses, and to furthering our understanding of how working memory and related cognitive processes are supported by the human brain.



Scott J. Moeller, PhDScott J. Moeller, PhD
Assistant Professor of Psychiatry

Dr. Moeller received his undergraduate degree from Stony Brook University Honors College in 2005 and his PhD from the University of Michigan in 2010, both in Psychology. He then completed postdoctoral training in addiction neuroimaging at Brookhaven National Laboratory and the Icahn School of Medicine at Mount Sinai. In 2013, he was promoted to Assistant Professor at Mount Sinai. Dr. Moeller’s research, funded by the National Institute on Drug Abuse (NIDA), uses behavioral and neuroimaging approaches to investigate cognitive and emotional impairments in human drug addiction. Current interests are in studying decision-making processes related to drug use and compromised self-awareness of addiction severity (insight). He has published more than 50 papers in peer-reviewed journals and is an Editorial Board member for Experimental and Clinical Psychopharmacology and American Journal of Drug and Alcohol Abuse. Dr. Moeller joined the MMTI Lab in 2017 to grow its work in substance use disorders.



Greg Perlman, PhDGreg Perlman, PhD
Research Assistant Professor of Psychiatry

Dr. Perlman obtained his PhD in Clinical Science and Psychopathology Research from the University of Minnesota-Twin Cities. He completed his Clinical Psychology Internship at the University of California, San Diego-Veteran’s Administration and served as a Postdoctoral Research Associate on a T32 NIMH Training Grant at the University of Minnesota-Twin Cities. Dr. Perlman has published more than 20 papers in peer-reviewed journals. In the last few years, he has received research funding from the Brain and Behavior Research Foundation and the National Aeronautics and Space Administration. His role in the MMTI Lab is to oversee clinical assessment, including symptom ratings and diagnosis.



Jodi J. Weinstein, MDJodi J. Weinstein, MD
Clinical Assistant Professor of Psychiatry

Dr. Weinstein studies the neural basis of psychiatric disorders and is particularly interested in the disease mechanisms of schizophrenia. Her research focuses on the application of PET and MRS modalities for clinical brain imaging studies. She has been invited to present her research as a 2015 Young Investigator for the Brain Imaging Council of the Society of Nuclear Medicine and Molecular Imaging, for Data Blitz at the 2015 Annual Meeting of the American College of Neuropsychopharmacology, and for Dopamine 2016 at the Medical University of Vienna. Dr. Weinstein completed her medical school degree and residency in psychiatry at Vanderbilt University in Nashville, TN. During her training, she developed expertise in psychopharmacologic and behavioral therapies for early episode psychosis and schizophrenia, and she facilitated a specialized outpatient clinic and co-led a support group for patients taking clozapine. She joined Dr. Abi-Dargham’s Division of Translational Imaging in 2014 as a T32 fellow at Columbia University. She also provides long-term supervision for residents in clinical outpatient psychiatry at Columbia.



Photo of Clifford M Cassidy, PhDClifford M Cassidy, PhD
Assistant Professor of Psychiatry and Director of Neuromodulation Research

Dr. Cassidy’s research focuses on development and applications of neuroimaging methods. His work has expanded the use of neuromelanin-sensitive MRI as a non-invasive method to study dopamine and norepinephrine systems in schizophrenia, substance use, PTSD, and other neuropsychiatric disorders. Ongoing work includes broader applications for neuromelanin-sensitive MRI, studies of decision making using functional magnetic resonance imaging, and studies employing cutting-edge neuromodulation methods for psychiatric treatment. Dr. Cassidy obtained MSc and PhD degrees from McGill University in Neuroscience and Psychiatric Research. He completed a postdoctoral fellowship at Columbia University within the Division of Translational Imaging under the mentorship of Dr. Abi-Dargham and Dr. Guillermo Horga. After several years leading a neuroimaging research lab at the University of Ottawa, he rejoined Dr. Abi-Dargham’s MMTI lab at SUNY Stony brook in 2024.


John C. Williams, MSJohn C. Williams, MS
MD/PhD Student (Biomedical Engineering)

John graduated with his B.E. in Computer Engineering and Applied Mathematics and Statistics in 2013 and M.S. in Electrical Engineering in 2015, both from Stony Brook University. From 2010 through 2015, he worked with Dr. Emilia Entcheva using computational methods to quantify electrophysiological mechanisms underlying stimulation of excitable tissue with light-sensitive ion channels (optogenetics) and its potential application to treating cardiac disease. John began his MD/PhD at Stony Brook in 2015, completing the first two years of medical school while developing an interest in functional neuroimaging through summer research rotations with Dr. Lillianne Mujica-Parodi and Drs. Ramin Parsey and Christine DeLorenzo. In July 2017, John began his work in the Multi-Modal Translational Imaging Laboratory, working with Dr. Van Snellenberg and Dr. Abi-Dargham. He is interested in using novel computational approaches to analyzing fMRI and PET in order to elucidate the biological basis of cognitive deficits in schizophrenia, as well as identify functional predictors and benchmarks for the efficacy of pharmacotherapy.


Natalka HauboldNatalka Haubold
Laboratory Manager

Natalka graduated from Stony Brook University in 2016 with a Bachelor of Arts degree in Psychology. She is responsible for managing daily research operations, research and regulatory administrations, quality improvement, and human resources management. Natalka also serves as the Executive Administrative Assistant to the Department of Psychiatry and Behavioral Chair, Dr. Anissa Abi-Dargham. 


Jiayan (Gary) Meng, MSJiayan (Gary) Meng, MS
Research Support Specialist

Jiayan graduated from Stony Brook University in 2015 with a Master of Science degree in Applied Health Informatics. His responsibilities include data analysis of PET and MRI images, including drawing of anatomical regions of interest and statistical analysis.




Sameera K. Abeykoon, PhDSameera K. Abeykoon, PhD
Programmer/ Analyst

Dr. Abeykoon completed her M.Sc. and Ph.D. degrees in Physics at the University of Houston, pioneering a new computational seismic modeling approach to solve the Helmholtz equation in an efficient manner for the exploration of oil and gas. After completing her Ph.D., she continued her computational research with the Senior Scientist, Jean Logan at the Brookhaven National Laboratory (BNL) developing computational/mathematical techniques to study kinetics of the [N- methyl-11C] Vorozole binding in normal human liver using Positron Emission Tomograsphy (PET). Dr. Abeykoon worked as a Postdoctoral Research Associate at the BNL’s Computer Science Initiative (CSI) from 2014-2017. During her appointment at the CSI, Dr. Abeykoon’s research was focused on developing a suite of streaming data analysis tools and pipelines, and parallelizing them to extract scientifically relevant information from high-throughput multidimensional X-ray data collected at the beamlines of National Synchrotron Light Source-II at BNL. In October 2017, Dr. Abeykoon joined the MMTI lab as a Programmer/Analyst. She is currently responsible for managing and analysis of multidimensional functional Magnetic Resonance Imaging (fMRI) and other clinical research neuroimaging data (arterial spin labeling, structural MR, Magnetic Resonance Spectroscopy, etc.), and testing and developing new algorithms and pipelines in bash, Python, Matlab and command-line Linux packages for fMRI data analysis, and maintenance of hosted Linux servers.


Shayne Thomas, BAShayne Thomas, BA
Research Support Specialist

Shayne graduated from The City College of New York in 2018 with a Bachelor of Arts degree in Psychology and Philosophy. Alongside his bachelor's degree, he earned his Credentialed Alcoholism and Substance Abuse Counselor Trainee (CASAC-T) certificate. For two years, he provided direct, clinical care services to individuals with substance use disorders. Currently, he assists with managing several brain-imaging, drug addiction research studies.


Benjamin VarnasBenjamin Varnas, BS
Research Support Specialist 

Ben graduated from The University of Massachusetts, Amherst in 2020 with a Bachelor of Science in Psychology. He is working as a research support specialist in the MMTI lab, where he assists in several studies involving MR and PET imaging.  Ben is interested in understanding the possible benefits of psilocybin therapy. He plans on continuing his education by pursuing a PhD in psychopharmacology.



Abilgail DaltonAbigail Dalton, BS
Research Support Specialist

Abigail graduated magna cum laude in the class of 2022 from Muhlenberg College with a bachelor of science in neuroscience and a minor in philosophy. Prior to joining the MMTI Lab, she co-developed and wrote the procedure for a study on visual and motor strategies in mental rotation in the de Wit Ecological Neuroscience (ECON) Lab. She also designed a large set of visual stimuli and collected preliminary data through pilot runs. Abigail’s future goals include earning a PhD in neuroscience and pursuing a career as a schizophrenia researcher. An avid runner, she can often be found jogging around the Stony Brook University campus.


Melissa EvrenselMelissa Evrensel, BS
Research Support Specialist

Melissa graduated from Stony Brook University in 2022 with a Bachelor of Science in Biology. She is currently working as a Research Support Specialist and Coordinator in the MMTI lab, where she assists in several studies involving MR and PET imaging. Melissa is the Lead Study Coordinator for Dr. Moeller’s Insight study and is interested in better understanding the mechanisms involved in addiction and psychiatric disorders like schizophrenia. She hopes to continue her education to become a practicing physician.


Jean Paul FarhatSidney Judson
Research Support Specialist 

Sidney graduated summa cum laude in the class of 2022 from Marist College with a Bachelor of Science in psychology and a minor in criminal justice.  She was also the captain of the Women’s Marist swimming and diving team during her undergraduate degree.  She is currently working as a Research Support Specialist and Coordinator in the MMTI lab, and is the Lead Study Coordinator for Dr. Van Snellenberg’s Schizophrenia study.  Sidney plans on continuing her education by pursuing a degree and career in either medicine or psychology. 


Jisoo KiimJisoo Kim
Research Support Specialist

Jisoo graduated from Denison University in 2023 with a Bachelor of Arts degree in Psychology and Women’s and Gender Studies. She is currently working as a research support specialist in the MMTI lab and hoping to better understand the brain and cognitive mechanisms underlying psychotic disorders, like Schizophrenia. Jisoo’s research interests include identifying the risk factors, implementing preventive measures, and developing treatments to enhance the mental health of individuals from diverse backgrounds.


Francesca McKernonFrancesca McKernon
Research Support Specialist / Research Concierge

Francesca graduated from Fordham University in 2023 with her Master of Science in Mental Health Counseling. She is currently working as a Research Support Specialist and Coordinator in the MMTI lab, where she assists in several studies involving MR and PET imaging. She is interested in the union of neuropsychology and the unique person’s lived experiences. She hopes to continue her education to become a Psychology professor in the future.


Photo of Gianna FucciGianna Fucci
Research Support Specialist

Gianna is a graduate of Sacred Heart University, Class of 2023, having earned a Bachelor of Science in Psychology with a minor in Business. She currently holds a position as a Research Support Specialist in the MMTI Lab, assisting in studies that place a focus on rTMS as a main intervention. With interests in clinical psychiatry and neurology, Gianna hopes to further her education, eventually working with child and adolescent populations.



Guillermo Horga, MD, PhDGuillermo Horga, MD, PhD
Assistant Professor of Clinical Psychiatry at Columbia University Medical Center

Dr. Horga’s research is focused on the cognitive and neurobiological mechanisms underlying cognition and learning in health and neuropsychiatric illness. More specifically, he is interested in how the brain forms internal models of the external world by learning environmental regularities, and how a disruption in this process may result in aberrant perceptions and beliefs such as those that characterize psychotic symptoms in schizophrenia. To this end, his research uses functional magnetic resonance imaging (fMRI) while participants perform a particular cognitive task or are at rest, molecular and metabolic positron emission tomography (PET) imaging, and computational modeling tools. His research aims at integrating findings from these various imaging modalities with computational models of learning and cognition in order to inform the development of cognitive models of specific psychiatric symptoms, and interrogate their precise neurobiological implementation at the molecular and systems levels, with the ultimate aim to develop novel treatments for these symptoms.


Kenneth Wengler, MS Kenneth Wengler, MS 
PhD Candidate (Biomedical Engineering)

Kenneth received his BS in Physics from St. John's University in 2014. He is currently a PhD candidate in Biomedical Engineering at Stony Brook University. His current research involves the development of novel magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) techniques for imaging brain function and metabolism and the application of MRI and MRS to probe metabolic dysfunction in neuropsychiatric disorders.