MIC Imaging & Procedure Center

Dr. John F. Guynan is a highly experienced interventional radiologist with 11 to 20 years of clinical practice. He earned his medical degree from the University of Nebraska College of Medicine and has since dedicated his career to the specialized field of radiology.

Dr. Guynan focuses on interpreting advanced imaging studies—including X-rays, PET scans, CT scans, and MRIs—to diagnose a wide range of medical conditions. In addition to diagnostic imaging, Dr. Guynan plays a critical role in cancer care, utilizing radiation therapy and interventional techniques to manage and treat cancerous tumors.

Dr. Tim Hallman, born in Dayton, Ohio, and raised in St. Paul, Minnesota, has been a valuable member of Radiology Consultants for the past two years. He specializes in interventional procedures including uterine and prostate artery embolization, vertebroplasty and kyphoplasty, Y90 radioembolization, and TIPS (transjugular intrahepatic portosystemic shunt).

Dr. Hallman’s areas of interest include oncologic and hepatobiliary interventions, as well as geniculate artery embolization. He is board eligible in Interventional Radiology and Diagnostic Radiology and holds medical licenses in Nebraska and Iowa.

Dr. Hallman completed his undergraduate and medical education at Creighton University and his residency at Creighton University School of Medicine. He furthered his training with a fellowship in Interventional Radiology at the University of Florida Health Shands Hospital. He is an active member of the Society of Interventional Radiology (SIR).

Dr. Pat Harty is a practicing Interventional Radiologist with Radiology Consultants of the Midwest in Omaha, Nebraska. He has been in practice for 18 years, the first 16 of which were in Sacramento, California. He was Chief of Interventional Radiology for Radiology Associates of Sacramento for many years, and later worked for Sutter Medical Group and served as director of the downtown outpatient IR center both before and after the groups merged. Dr. Harty was involved early on in building outpatient IR centers in 2008 and 2011.

Dr. Harty’s special interest is in peripheral artery disease, and he teaches both locally and nationally for Boston Scientific and Shockwave Medical. He has used the Jetstream device since 2011, and has performed over 500 cases. Most recently he has been particularly interested in the use of combination therapy with atherectomy, IVL, and DCB.

Dr. Harty graduated from Georgetown University with a B.A. in Honors English in 1996. He earned his medical degree from Creighton University in 2000, and served as class president. He also did his medical internship and Diagnostic Radiology residency at Creighton University. His fellowship in Vascular and Interventional Radiology was completed at the University of Illinois College of Medicine at Peoria program, where he learned his passion for peripheral arterial disease in the very vascular-heavy fellowship there.

In addition to PAD, he also enjoys treating venous thromboembolic disease and was very instrumental in building the DVT and PE program at his current practice over the past 2 years. Outside of work, he enjoys gravel racing and competed in the CrossFit Games team finals in Carson, CA in 2010.

Dr. Jeb List, born and raised in Yankton, SD, has been a valued member of Radiology Consultants for the past four years. He specializes in both Pediatric and Adult Interventional Radiology. Dr. List is a member of the Society of Interventional Radiology and the Society of Pediatric Interventional Radiology. He completed his radiology residency at Creighton University and pursued fellowships in Interventional Radiology at the University of Washington and in Pediatric Interventional Radiology at Seattle Children’s Hospital.

Dr. Chad Eicher, originally from Willingboro, NJ, and raised in Seward, NE, has been a resolute member of Radiology Consultants since 2010. He specializes in Interventional Radiology, offering a full spectrum of procedures including prostate artery embolization (PAE), genicular artery embolization (GAE), uterine fibroid embolization (UFE), varicose vein treatments, vertebral augmentation, and interventional oncology.

Dr. Eicher’s professional interests include embolization procedures and interventional oncology. He is board certified in both Interventional Radiology and Diagnostic Radiology and holds medical licenses in Nebraska and Iowa. His professional memberships include the Society of Interventional Radiology (SIR), the Society of Interventional Oncology (SIO), the American Roentgen Ray Society (ARRS), the Radiological Society of North America (RSNA), and the American College of Radiology (ACR).

Dr. Eicher earned his Bachelor of Science from the University of Nebraska-Lincoln and his MD from the University of Nebraska Medical Center (UNMC). He completed his residency at Creighton University Medical Center and his Interventional Radiology fellowship at UNMC. Dr. Eicher served on active duty at Eisenhower Army Medical Center from 2007 to 2010. Outside of work, he enjoys spending time with his wife and six children, as well as engaging in sports, fitness, and outdoor activities.