As part of an academic medical center, the Department of Radiology at Northwestern University Feinberg School of Medicine (Feinberg) aims to improve the human health through scientific research.
About Clinical Trials
Clinical trials test or study drugs, surgical procedures, medical devices, or interventions with human subjects. They look to determine their safety and effectiveness in relation to treating specific diseases. Clinical trials are part of clinical research and are at the heart of all medical advances.
Department of Radiology Clinical Trials
The following searchable list includes all Department of Radiology clinical trials currently looking for participants.
Please feel free to contact us with inquiries about any of our ongoing research.
High Resolution and Functional MRI Assessment of Intracranial Atherosclerotic Plaque
Intracranial atherosclerotic disease (ICAD) accounts for 7-10% of cute ischemic stroke with a substantial risk of recurrent stroke in a setting of severe intracranial stenosis, approaching 12-25% over 1-2 years despi…
Intracranial atherosclerotic disease (ICAD) accounts for 7-10% of cute ischemic stroke with a substantial risk of recurrent stroke in a setting of severe intracranial stenosis, approaching 12-25% over 1-2 years despite medical management. However, a risk stratification scheme is not available to identify this susceptible population for targeted treatment trials when intervention with more aggressive medical management and/or endovascular angioplasty/stenting could limit complications of ischemic stroke. The unmet need that we plan to address is to develop and study MR imaging modalities that may characterize vulnerable inflammatory and/or hemodynamically significant intracranial plaques, stratifying the mechanisms and potential predictors of primary/recurrent ischemic stroke in ICAD. Recently, we have identified unique intracranial plaque characteristics as well as hemodynamic parameters using quantitative MR perfusion techniques to stage cerebrovascular reserve failure that are associated with symptomatic intracranial stenoses. We propose a prospective study to recruit asymptomatic and symptomatic patients with severe ICAD and longitudinally assess them with a comprehensive and novel MRI protocol: high resolution 3T MR imaging, ferumoxytol molecular imaging, dynamic contrast enhanced (DCE) MRI to quantify the transfer constant (Ktrans) of contrast plaque permeability, and dynamic susceptibility contrast (DSC) MR perfusion weighted imaging (MRPWI) using the quantitative SCALE-PWI sequence. Our study hypothesis is that high resolution T1 plaque enhancement, T1/T2 plaque hemorrhage, early ferumoxytol uptake as a marker of macrophage infiltration/inflammation, intraplaque Ktrans permeability, and/or altered qCBF/qCBV perfusion based parameters with vascular territory analysis will assist in stratifying patient risk for thromboembolic versus hypoperfusion related ischemic complications respectively. This project aims to identify specific qualitative and quantitative thresholds with advanced high resolution, molecular, and functional MRI techniques that can be correlated to clinical presentations (asymptomatic, symptomatic, recurrent symptomatic), DWI infarct distributions (perforator, thromboembolic, hypoperfusion related infarcts), inflammatory blood markers, and clinical/imaging outcomes to inform an understanding of differential stroke mechanisms and to improve the selection of high risk ICAD patients who may be susceptible to primary or recurrent ischemic stroke despite aggressive medical management.
1- Severe ICAD>70% confirmed by SOC CTA/MRA/DSA using SAMMPRIS criteria2
2- AGE 30-80 YEARS
3- At least one segment of
a) supraclinoid ICA,
b) A1-A2 ACA,
c) M1-M2 MCA,
d) intracranial vertebral-basilar artery
e) P1-P2 PCA
4- Age 30-80 years
5- Symptomatic patients defined as an association between the intracranial stenosis and hemodynamic impairment of the corresponding vascular territory, based on either neurological exam (TIAs/stroke) and/or acute/subacute infarcts documented on MR-DWI
1- Contraindications to MRI-Fill safety questionnaire day before MRI/Call to ask
2- GFR70% cervical carotid or vertebral artery proximal stenosis, or tandem intracranial stenoses,
5- Impaired liver function
The objective of this study is to determine the mechanisms of stroke in patients with Intracranial Atherosclerotic Disease (IAD) by specifically evaluating limitations of antegrade flow through the stenotic artery, distal tissue perfusion to the affected terr…
The objective of this study is to determine the mechanisms of stroke in patients with Intracranial Atherosclerotic Disease (IAD) by specifically evaluating limitations of antegrade flow through the stenotic artery, distal tissue perfusion to the affected territory, and artery-to-artery embolism. The hypothesis is that non-invasive imaging biomarkers that stratify stroke risk and distinguish mechanisms of IAD. This prospective multicenter study will enroll 175 patients with recently symptomatic high-grade IAD. Patients will be studied within 21 days of the index event (allowing appropriate time to arrange for diverse imaging modalities), with the following advanced neuroimaging techniques to elucidate mechanisms of recurrent ischemia: - Quantitative magnetic resonance imaging (QMRA) to assess volumetric flow rate through the stenotic artery. - Magnetic resonance perfusion weighted imaging (PWI-MRI) to determine distal tissue perfusion. - Vasomotor reactivity by Transcranial Doppler using the breath-holding technique (BHI-TCD) to assess compensatory flow characteristics to the territory distal to the affected artery; - Transcranial Doppler with embolic signal monitoring to evaluate artery-to-artery embolism that reflects plaque instability. Patients will receive standardized medical management and its effectiveness on blood pressure, lipid, and glycemic control will be monitored. The primary outcome is recurrent stroke in the territory of the stenotic artery during a 1-year follow-up period; secondary outcomes are: a) new asymptomatic ischemic lesions on MRI in the distribution of the stenotic artery at 6-8 weeks, and b) transient ischemic attack (TIA) in the distribution of the stenotic artery during a 1-year follow-up period. Patients will be recruited at various sites that will be trained and certified on the imaging techniques employed. Raw imaging data will be interpreted centrally.
1- Symptomatic stroke/TIA due to IAD
2- Stenosis 70-99% measured on CTA/DSA/MRA as SOC (WASID criteria) and MRA flow gap (send to bay state)
3-Stroke/TIA diagnosed on CT or MRI
3- TIA with DWI abnormalities or ≥2 stereotyped events (weakness, aphasia)
5- IAD-Intracranial Carotid
MCA, Intracranial Vertebral,
6- Age >30;
7- 30-49 also IAD in another vascular bed (coronary, extracranial carotid, peripheral) or the presence of 2 or more risk factors (hypertension, diabetes mellitus, hyperlipidemia, tobacco abuse within the last 2 years).
8- Enrollment within 21 days of index event
1- No ACA No PCA
2- Other cause of stroke/TIA besides ICAD
3- Angioplasty/stenting performed or planned on target vessel or on a vessel proximal to it.
4- Contraindications to MRI,
5- Pregnancy, lactation, morbid obesity, and severe claustrophobia.
6- Cr >1.5 mg/dL or GFR
Longitudinal fMRI tES Study in Tinnitus
Volunteers with chronic tinnitus are invited to participate in a brain research study at NorthwesternUniversity. Our research group uses brain scans to understand and improve neuromodulation techniques. This study involves transcranial electrical stimula…
Volunteers with chronic tinnitus are invited to participate in a brain research study at NorthwesternUniversity. Our research group uses brain scans to understand and improve neuromodulation techniques. This study involves transcranial electrical stimulation (tES), a neuromodulation technique that delivers mild electrical current between electrodes placed on the scalp to study brain networks in healthy individuals and people with brain conditions. The study includes questionnaires, perception tests, two brain scans, and ten tES sessions at the Center for Translational Imaging atNorthwestern. These procedures will be at no cost to you and will occur during12 study visits over 10 weeks. The first visit will last 4 hours, and all other visits will last 1 hour or less. Participants will be compensated up to $225.
For more information on this study please contact us:Leaver, Amber