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phMRI: methodological considerations for mitigating potential confounding factors
Julius H Bourke1, Matthew B Wall2
1Centre for Psychiatry, The London School of Medicine and Dentistry, Wolfson Barts Institute for Preventive Medicine, Queen Mary University of London London, UK.
Abstract:
Pharmacological Magnetic Resonance Imaging (phMRI) is a variant of conventional MRI that adds pharmacological manipulations in order to study the effects of drugs, or uses pharmacological probes to investigate basic or applied (e.g., clinical) neuroscience questions. Issues that may confound the interpretation of results from various types of phMRI studies are briefly discussed, and a set of methodological strategies that can mitigate these problems are described. These include strategies that can be employed at every stage of investigation, from study design to interpretation of resulting data, and additional techniques suited for use with clinical populations are also featured. Pharmacological MRI is a challenging area of research that has both significant advantages and formidable difficulties, however with due consideration and use of these strategies many of the key obstacles can be overcome.
Insights
Pharmacological Magnetic Resonance Imaging (phMRI) offers insights into drug effects and neuroscience. Methodological strategies can overcome challenges in phMRI study design, data interpretation, and clinical applications.
Area of Science:
- Neuroscience
- Pharmacology
- Medical Imaging
Background:
- Conventional Magnetic Resonance Imaging (MRI) is enhanced by pharmacological manipulations in pharmacological MRI (phMRI).
- phMRI enables the study of drug effects and the use of pharmacological probes for neuroscience research.
Purpose of the Study:
- To discuss issues that may confound the interpretation of phMRI study results.
- To describe methodological strategies for mitigating these confounding issues in phMRI research.
- To highlight techniques suitable for clinical populations within phMRI studies.
Main Methods:
- Review and discussion of potential confounding factors in phMRI studies.
- Description of methodological strategies applicable across all investigation stages: study design, data acquisition, and interpretation.
- Inclusion of specialized techniques for phMRI research involving clinical populations.
Main Results:
- Identification of key challenges and confounding factors in phMRI research.
- Presentation of a comprehensive set of strategies to enhance the reliability and validity of phMRI findings.
- Demonstration that careful consideration and application of these strategies can overcome significant obstacles.
Conclusions:
- Pharmacological MRI is a powerful but challenging research area.
- Implementing proposed methodological strategies is crucial for overcoming obstacles.
- phMRI, when conducted rigorously, offers significant advantages for neuroscience and clinical applications.
