Dotter Department of Interventional Radiology Research

A male scientist in a lab injects liquid into test tubes to analyze.

Advancing what’s possible in image-guided medicine

Research at the Dotter Department of Interventional Radiology focuses on using minimally invasive treatment to improve lives. Our doctors and scientists investigate new therapies, develop techniques and act as leaders within the IR research community regionally and globally.  

What sets us apart

We see research as inseparable from clinical care. Building on the legacy of IR pioneers Dr. Charles Dotter and Dr. Josef Rösch, our work advances image-guided therapies that directly improve patient outcomes worldwide. We do this by: 

Faculty careers  

Find professor,  physician and APP faculty jobs at OHSU. 

Leadership in IR discovery 

SIR Abstract of the Year for study of IR techniques and immune modulating nanoparticles for HCC

Research investigations and innovations

Our faculty drive discovery in minimally invasive and image-guided medicine through a variety of research and studies. With support from National Institutes of Health grants R01 and R21, we are developing: 

  • Organ-selective immunotherapy through image-guided intra-arterial delivery of nanoparticles in tumor models
  • Organ-selective magnetic hyperthermia treatment for pancreatic cancer
  • Nucleic acid biomarkers, including tumor-derived DNA and RNA, for the early detection of hepatocellular carcinoma
  • Novel theranostic nanoparticles that integrate therapeutic and diagnostic capabilities, in collaboration with Oregon State University 

Translational research

We translate innovation from bench to bedside and back again. Our investigators collaborate with partners in and out of OHSU to explore gene therapy, imaging technology, embolization techniques and cancer treatments. These efforts move promising discoveries toward clinical applications. 

  • We developed a chronic post-thrombotic venous stenosis model for treating deep-vein thrombosis.
  • We are collaborating on organ-selective gene therapy using image-guided treatment platforms.
  • We are improving angiographic image quality through artificial intelligence

Clinical research using real-world data

We pursue groundbreaking research, led by nationally recognized faculty who publish dozens of peer-reviewed studies each year.

Our faculty and fellows conduct outcomes research using robust, real-world clinical datasets. These data-driven studies inform best practices and refine patient selection, safety and long-term outcomes.

Clinical trial–connected innovation

Our research in interventional oncology and endovascular care advances care for kidney and liver tumors, fibroids and thoracic aortic aneurysms. 

Through multiple clinical trials, we study new devices, techniques and therapies. Many of our research projects align with these trials, helping to move promising innovations and technologies from the lab to patient care.

Topics our faculty investigate

  • Liver cancer and pancreatic cancer
  • Novel biomarker response to locoregional liver cancer therapy
  • Portal hypertension
  • Venous occlusive disease
  • Uterine artery embolization for leiyomyomas
  • Endovascular treatment of thoracic aortic aneurysms
  • Thrombus removal in acute venous thrombosis
  • Treatment of hepatocellular carcinoma

How we foster IR collaboration

Our faculty work with multidisciplinary teams and industry partners on novel cancer therapies, embolization advances and real-world outcomes research.  

This collaborative environment is what we call “living IR”: an ecosystem that ties innovation to clinical practice. It aligns studies with active clinical trials, ensuring discoveries quickly move from concept to patient care using real-world data sets. 

Peer-reviewed IR research publications and studies

We produce dozens of peer-reviewed publications annually and participate in multiple clinical studies and trials that advance the field of IR.  

Our work has been recognized with multiple awards at national and international interventional radiology meetings, including the Society of Interventional Radiology (SIR) and the Radiological Society of North America (RSNA)

Local clinical trials

We participate in a variety of clinical trials that study ways to advance IR treatment. Local studies include:  

  • Endovascular treatment for thoracic aortic aneurysms: Studies minimally invasive techniques to improve patient outcomes
  • Advanced clot removal for venous thrombosis: Evaluates procedures that restore blood flow more effectively
  • New therapies and biomarkers for liver cancer: Tests embolization materials and cfRNA biomarkers to improve detection, monitoring and treatment of hepatocellular carcinoma (funded by the Department of Defense)
  • TIPS outcomes in cirrhosis: Examines how transhepatic intrajugular portosystemic shunt (TIPS) placement affects body composition and clinical outcomes in patients awaiting liver transplant
  • Cryoablation for Morton’s neuroma: Compares ICE-Seed cryoablation with injection therapy for treatment 

National IR clinical trials

Our faculty take part in several national clinical trials studies, some of them supported by the National Institutes of Health (NIH), including: 

Neurointerventional radiology clinical trials

Our neurointerventional radiology clinical trials explore aneurysm, stroke and cerebrovascular innovation. These studies evaluate next-generation devices and help shape new neurointerventional therapies. A few recent studies include: 

Intracranial aneurysm and neurovascular device trials

GUARD 
Evaluates the safety and effectiveness of the Surpass Elite flow diverter with GUARD technology for treating intracranial aneurysms of the internal carotid artery. View study (ClinicalTrials.gov)  

SCENT  
Assesses the safety and effectiveness of the Surpass flow diverter system for large or giant wide-neck intracranial aneurysms, with long-term follow-up on aneurysm occlusion and clinical outcomes. View study (ClinicalTrials.gov)  

PREMIER 
Evaluates the Pipeline™ embolization device for treating small-to-medium (4–10 mm), unruptured wide-neck intracranial aneurysms, focusing on occlusion rates and safety outcomes. 

BARREL 
Examines the safety and effectiveness of the Barrel™ vascular reconstruction device to assist coil embolization of wide-neck bifurcation aneurysms. 

CITADEL 
Investigates the safety and effectiveness of an intrasaccular embolization device designed for wide-neck bifurcation aneurysms. 

EVOLVE 
Assesses safety and effectiveness of the Surpass embolization system using an updated delivery platform for wide-neck intracranial aneurysms. 

Stroke and thrombectomy trials

SWIFT PRIME 
Randomized trial demonstrating improved functional outcomes when combining IV tPA with Solitaire thrombectomy versus IV tPA alone in acute ischemic stroke. 

DEFUSE 3 
Phase III randomized trial showing benefit of endovascular thrombectomy 6–16 hours after stroke onset in patients selected by advanced imaging. 

TREVO (TREVO 2) 
Compares the Trevo Retriever with the Merci device for restoring blood flow in acute ischemic stroke due to large vessel occlusion. 

STRATIS Registry 
Large real-world registry evaluating outcomes and system-level factors influencing thrombectomy success using commercially available devices. 

ARISE II 
Prospective study evaluating the safety, performance and revascularization outcomes of the EmboTrap thrombectomy device. 

TIGERTRIEVR 
Evaluates whether the Tigertriever device is as effective or superior to existing stent retrievers for mechanical thrombectomy. 

MARRS 
Assesses the safety and performance of the Millipede System for revascularization in acute ischemic stroke due to large vessel occlusion. 

SUMMIT MAX 
Evaluates the safety and performance of the Route 92 access and reperfusion system for treating acute ischemic stroke.

Subdural hematoma embolization trials

EMBOLISE 
Evaluates the effectiveness of Onyx liquid embolic system in treating chronic subdural hematoma by targeting the middle meningeal artery. 

MEMBRANE 
Assesses the safety and effectiveness of NBCA liquid embolization for chronic subdural hematoma treatment. 

Venous and CSF-related conditions

RIVER 
Investigates the safety and effectiveness of venous sinus stenting (RIVER stent) in patients with idiopathic intracranial hypertension (pseudotumor cerebri). 

Carotid and vascular trials

CREST-2 
Two large randomized trials comparing carotid revascularization (endarterectomy or stenting) plus intensive medical therapy versus medical therapy alone for asymptomatic high-grade carotid stenosis. 

SAPPHIRE 
Evaluates carotid artery stenting with distal embolic protection versus surgery in high-risk patients with carotid artery disease. 

WEAVE 
Post-market study assessing periprocedural stroke and death rates with the Wingspan stent system when used per on-label indications. 

Aneurysm coil and embolization studies

HEAT Trial 
Compares HydroCoil Embolization System with bare platinum coils for intracranial aneurysm treatment in a post-market setting. 

Portrait of Dr. Khashayar Farsad, interventional radiologist at OHSU.

“Our research advances what’s possible in minimally invasive, image-guided therapy, translating discovery into practical ways to make care for patients safer and more effective.”

Make a gift

Support the Dotter Department of Interventional Radiology in advancing the future of minimally invasive care. 

Lectures and events

Attend IR events named after OHSU pioneers Dr. Charles T. Dotter and Dr. Josef Rösch.

Portrait of Dr. Kentaro Yamada,   interventional radiologist at OHSU

"Innovation here comes from integration of clinical immersion, translational science, real-world data and collaboration across institutions and industry.”

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