Escitalopram Neuroimaging Supplement
The purpose of this study is to find out more about the brain's response to selective serotonin reuptake inhibitor (SSRIs) treatment in people with body dysmorphic disorder (BDD). The investigators will use positron emission tomography (PET) and Magnetic Resonance Imaging (MRI) scans to look at brain activity in people with BDD before and after treatment with an SSRI. The investigators hope that what is learned will allow prediction of whether someone will improve with SSRI treatment.
|Study Design:||Observational Model: Case-Only
Time Perspective: Prospective
|Official Title:||Cerebral Metabolic Correlates of Treatment Response to Escitalopram in Body Dysmorphic Disorder|
- BDD-YBOCS [ Time Frame: 9 months ] [ Designated as safety issue: No ]We will test for correlations between pre-treatment FDG brain images and subsequent SSRI treatment outcome to identify potential predictors of treatment response. Statistical parametric maps will be used to assess the relationship between rCMRglu and subsequent clinical response (expressed as percent change in BDD-YBOCS).
- PET FDG and MRI studies [ Time Frame: 9 months ] [ Designated as safety issue: No ]We will compare pre-treatment and post-treatment PET FDG studies as well as MRI studies in BDD subjects to examine changes in these brain regions following treatment.
|Study Start Date:||December 2008|
|Study Completion Date:||March 2013|
|Primary Completion Date:||March 2013 (Final data collection date for primary outcome measure)|
Procedure: PET scan and MRI scan
PET: The PET Scan is manufactured by Siemens and the model is the Exact HR+ .rCMRglu data will be gathered over a 30 minute resting period using a Siemens HR+ PET camera (4.5 mm in-plane and axial resolution). The total time for an individual PET session, will thus be one hour and a half (30 minutes for serum pregnancy test and 30 minute uptake period followed by 30 minutes of scanning).
MRI: High-resolution scans will be acquired using a Seimens (manufacturer) 1.5T Avonta system at MGH, to be coregistered with subsequently acquired PET images, and used for A) delineation of regions of interest (ROIs), and B) facilitation of optimal transformation to MNI space.
The investigators have chosen to focus on five regions of interest, namely ACC, OFC, caudate, amygdala and hippocampus. These are brain regions that have been previously associated with obsessive-compulsive, affective, and psychotic phenomena. The investigators will test for correlations between pre-treatment FDG brain images and subsequent SSRI treatment outcome to identify potential predictors of treatment response. Finally, the investigators will compare pre-treatment and post-treatment PET FDG studies as well as MRI studies in BDD subjects to examine changes in these brain regions following treatment. The goals of the proposed research are to use FDG-PET and MRI to identify predictors of treatment response to SSRIs in BDD and to determine changes in rCMRglu in BDD subjects following treatment with SSRIs.
|United States, Massachusetts|
|OCD & Related Disorders Clinic|
|Boston, Massachusetts, United States, 02114|
|Principal Investigator:||Sabine Wilhelm, PhD||Massachusetts General Hospital|