Functional and Anatomical Magnetic Resonance Imaging (MRI) of Chronic Brain Injury and Hyperbaric Oxygen (HBO2) Study Subjects (HYBOBI-MRI)
The purpose of this study is to evaluate Brain MRI (Magnetic Resonance Imaging), and Brain CT (Computed Tomography) Angiogram data in subjects who participate in the "Hyperbaric Oxygen for Chronic Stable Brain Injury" (HYBOBI) study. Including information from MRI and CT studies provide information about whether hyperbaric oxygen improves brain function in subjects who have had a brain injury. Subjects will complete MR and CT scans twice during the study. The first MR and CT will be performed prior to the first hyperbaric session of the HYBOBI study, and the second will be performed within two weeks following the last hyperbaric session.
Procedure: Magnetic Resonance Imaging
Procedure: Computed Tomography Angiography
|Study Design:||Observational Model: Cohort
Time Perspective: Prospective
|Official Title:||MRI & CT Angiogram and Hyperbaric Oxygen in Chronic Stable Brain Injury|
- Auditory functional magnetic resonance imaging (fMRI) activation [ Time Frame: Within 2 weeks of final hyperbaric session ] [ Designated as safety issue: No ]The first prime outcome measure will be auditory functional magnetic resonance imaging (fMRI) activation, comparing post-hyperbaric oxygen to pre-hyperbaric oxygen. This is a categorical variable: absent, mild, moderate, normal, and increasing. We will look at the difference between pre-hyperbaric (pre-HBO2) and post-hyperbaric (post-HBO2) scans graphically and descriptively, with the percentage of patients who show any improvement (any change towards normal).
- Computed tomography angiography (CTA) Brain Perfusion [ Time Frame: Within 2 weeks of the final hyperbaric session ] [ Designated as safety issue: No ]Pre-hyperbaric (pre-HBO2) computed tomography angiography (CTA) results will be determined to be normal or abnormal, and then compared to the post-hyperbaric (post-HBO2) scan, which will be scored as better, worse, or no change.
- MRI Results [ Time Frame: Within 2 weeks of the final hyperbaric session ] [ Designated as safety issue: No ]
- Cortical activation (amount and location) for motor, visual, and olfactory fMRI.
- Diffusion tensor imaging (fractional anisotropy differences, number of fiber tracts) within the Corpus Callosum
|Study Start Date:||July 2007|
|Study Completion Date:||June 2010|
|Primary Completion Date:||June 2010 (Final data collection date for primary outcome measure)|
In this open-label feasibility study, all subjects will receive 60 hyperbaric oxygen sessions (100% oxygen, 1.5 atmospheres absolute (atm abs), for 60 minutes), delivered daily, five days per week.
Procedure: Magnetic Resonance Imaging
Imaging of the brain without gadolinium will be performed with a 3 Tesla magnetic resonance (MR) System (Intera Achieva 3T; Philips Medical Systems). The protocol will include anatomical sequences, a diffusion tensor imaging sequence with fiber tracking, and auditory, visual, and motor functional magnetic resonance imaging (MRI).
Other Names:Procedure: Computed Tomography Angiography
Computed tomography angiography (CTA) with intravenous (IV) contrast will be performed on a 320 head computed tomography (CT) scanner, assessing brain perfusion.
In an ongoing feasibility study (HYBOBI), brain-injured subjects are exposed to hyperbaric oxygen at 1.5 atmospheres for 60 minutes. They receive this exposure five days per week, and receive 60 total sessions. Prior to hyperbaric oxygen, these study subjects have neurologic, cognitive, and functional measures. The measures are repeated at the conclusion of 60 hyperbaric oxygen sessions, and again six months later. The goal of the HYBOBI feasibility study is to learn about these patients and determine possible hyperbaric oxygen effects, if any, to prepare for a blinded randomized controlled clinical trial.
This study adds an imaging component to the HYBOBI study, further investigating brain changes in participants. Participants will undergo Brain MRI (Magnetic Resonance Imaging) using a 3 tesla magnet, and Brain CT (Computed Tomography) Angiogram. Subjects will undergo imaging before receiving hyperbaric oxygen and within 2 weeks of completion of the 60 hyperbaric sessions.
|United States, Utah|
|Salt Lake City, Utah, United States, 84143|
|Principal Investigator:||Susan K Churchill, APRN-NP||Intermountain Health Care, Inc.|
|Principal Investigator:||Lindell K Weaver, MD||Intermountain Health Care, Inc.|