Study of Low-intensity Focused Ultrasound Effects on Heat Evoked fMRI Signals

Virginia Polytechnic Institute and State University

Status: Enrolling

Conditions: Pain

Treatments: Other: Neuromodulation with low-intensity focused ultrasound

Study type: Interventional

Funder types: Other

Identifiers

NCT05303415

22-247

Details and patient eligibility

About

Study aims to examine the effects of noninvasive brain stimulation on brain signals. This insight may have potential clinical implications for addiction, pain, and mental health populations. Participants will receive MRI and CT imaging. Participants receive low-intensity focused ultrasound (LIFU) to temporarily change brain activity. Participants then receive fMRI scans to measure changes in both resting and heat evoked brain signaling using a quantitative sensory testing device. Heart rate, blood pressure, respiratory rate, and skin moisture is monitored. Participants complete a battery of questionnaires, both behavioral and symptom monitoring. The study takes place over 4 study visits.

Enrollment: 80 estimated patients

Sex: All

Ages: 18 to 65 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Healthy volunteers, all ethnicities, who understand and speak English.

Exclusion criteria

Claustrophobia (scanning environment may be uncomfortable). Contraindications to MRI: including pacemaker, aneurysm clips, neurostimulators, cochlear implants, metal in eyes, steel worker, or other implants.

Contraindications to CT: pregnancy Active medical disorder or treatment with potential CNS effects (e.g. Alzheimer's) History of neurologic disorder. (e.g. Parkinson's, Epilepsy, or Essential Tremor) History of head injury resulting in loss of consciousness for >10 minutes. History of alcohol or drug dependence (through self-report).

Trial design

Primary purpose: Basic Science

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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80 participants in 1 patient group

LIFU, heat evoked fMRI signals

Experimental group

Description:

fMRI resting and heat evoked signals performed after LIFU application to known brain region of interest or active sham region (within participant all conditions tested).

Treatment:

Other: Neuromodulation with low-intensity focused ultrasound