About Us

The board certified, fellowship trained radiologists of Columbia Imaging Group are committed to the care of its patients by complementing the comprehensive clinical evaluation through expert medical imaging interpretation and interventional therapy.

We have assembled a highly trained group of Radiology professionals dedicated to serving the community of patients and physicians of PeaceHealth Southwest Medical Center. Our physicians are all Fellowship Trained, Board Certified Radiologists who have received their education and experience from some of the leading medical centers in U.S.




Our Physicians

KEITH BERNSTEIN, MD

KEITH BERNSTEIN, MD

Dr. Bernstein specializes in diagnostic radiology and has additional post-graduate training in neuroradiology. He holds an official subspecialization certification for imaging of the brain, spine, head and neck (certificate of added qualification (CAQ), neuroradiology). He was previously in practice on the Oregon coast, and also a clinical assistant professor at OHSU.

Dr. Bernstein has served as President of CIG, is currently the Chair of Radiology as well as Chief Operating Officer, and is proud to be a staff physician of PeaceHealth Southwest Medical Center.

UNDERGRADUATE
University of Southern California, Los Angeles (USC)

MEDICAL SCHOOL
University of California, Los Angeles (UCLA)

RESIDENCY
Saint Vincent's Hospital and Medical Center of New York, New York Medical College

FELLOWSHIP
University of Southern California, Los Angeles (USC); Neuroradiology

ROBERT BLOCH, MD

ROBERT BLOCH, MD

Dr. Bloch is board-certified in diagnostic radiology and has additional CAQ certification in vascular and interventional radiology from the American Board of Radiology. He has special interest in vascular imaging, cardiac imaging and all aspects of interventional radiology. From 1998-2002, Dr. Bloch was an Assistant Professor on the radiology faculty at the University of Washington. His areas of expertise include general radiology, all aspects of vascular radiology including CT angiography, MR angiography and all aspects of endovascular and interventional radiology, as well as all aspects of Interventional and Vascular therapy.

Dr. Bloch is a founding member of CIG.

SPECIALTIES
Interventional Radiology including CT Angiography, MR Angiography, Endovascular and Nonvascular Intervention, Body Imaging.

UNDERGRADUATE
BA, Biology, Pomona College, Claremont, CA

MEDICAL SCHOOL
University Health Sciences /The Chicago Medical School; MD and PhD

RESIDENCY
Loma Linda University Medical Center, Loma Linda, CA

FELLOWSHIP
Dotter Interventional Institute at Oregon Health Sciences University; Interventional Therapy


WILLIAM BRINKMAN, MD

WILLIAM BRINKMAN, MD

Dr. William Brinkman graduated magna cum laude from Ripon College. He went on to earn his medical degree from the University Of Illinois College Of Medicine. Dr. Brinkman is board certified by the American Board of Radiology and maintains a Certificate of Added Qualification (CAQ) in neuroradiology.

Dr. Brinkman previously served as President and Treasurer of CIG.

SPECIALTIES
Neuroradiology

UNDERGRADUATE
Ripon College, Wisconsin

MEDICAL SCHOOL
University of Illinois College of Medicine

RESIDENCY
Radiology; University of Washington School of Medicine

FELLOWSHIP
Neuroradiology; University of Washington School of Medicine

THOMAS DEMLOW, MD

THOMAS DEMLOW, MD

Dr. Demlow is board-certified in diagnostic radiology. He has undergone fellowship training in interventional and musculoskeletal radiology.

UNDERGRADUATE
Trinity University, San Antonio, Texas

MEDICAL SCHOOL
Oral Roberts University School of Medicine, Tulsa, Oklahoma

RESIDENCY
San Joaquin General Hospital: General Surgery: PG1 and 2
Oregon Health Sciences University, Portland, Oregon: Diagnostic Radiology

FELLOWSHIP
Good Samaritan Hospital; Interventional/MRI, Portland, Oregon

SHARON D'SOUZA, MD, MPH

SHARON D'SOUZA, MD, MPH

Prior to attending medical school Sharon D’Souza graduated from the University of Oklahoma with a Bachelor of Science degree in Microbiology and Chemistry as well as a Master of Public Health in Health Administration and Policy. She then went on to receive her medical degree from the University of Oklahoma Health Sciences Center. She performed her General Surgery Internship and Diagnostic Radiology Residency at the University of Oklahoma. She subsequently completed Fellowships in Magnetic Resonance Imaging and Breast Imaging at the University of Wisconsin in Madison. Dr. D’Souza is board certified by the American Board of Radiology.

SPECIALTIES
MRI, Breast Imaging

UNDERGRADUATE
University of Oklahoma, Norman, Oklahoma

GRADUATE
University of Oklahoma College of Public Health, Oklahoma City, Oklahoma

MEDICAL SCHOOL
University of Oklahoma College of Medicine

INTERNSHIP
University of Oklahoma, Tulsa, Oklahoma

RESIDENCY
University of Oklahoma, Oklahoma City, Oklahoma

FELLOWSHIP
MRI and Breast Imaging, University of Wisconsin, Madison, WI



WILLIAM KUHLE, MD, MS

WILLIAM KUHLE, MD, MS

Dr. Kuhle is board certified in diagnostic radiology, subspecializing in nuclear medicine and interventional radiology. At UCLA, he was a researcher in the PET laboratory headed by Dr. Michael Phelps and Dr. Heinrich Schelbert. Prior to joining Columbia Imaging Group he worked at the Sacred Heart Medical Center in Eugene, Oregon and at Methodist Health Systems in Dallas, Texas.

Dr. Kuhle is the Director of Information Technologies, Director of Body Imaging for PeaceHealth Southwest Medical Center, Radiation Safety Officer, and is the past Executive Vice President of CIG.

SPECIALTIES
Nuclear Medicine, Interventional Radiology

UNDERGRADUATE
Harvey Mudd College, Claremont, California

GRADUATE
Stanford University, Palo Alto, California

MEDICAL SCHOOL
University of California School of Medicine, Los Angeles (UCLA)

INTERNSHIP
Los Angeles County/USC Medical Center, Los Angeles

RESIDENCY
Diagnostic Radiology, University of California, Los Angeles Medical Center

FELLOWSHIP
Interventional Radiology, Harvard Medical School

MICHAEL MORICH, MD

MICHAEL MORICH, MD

Before pursuing his medical degree, Dr. Michael Morich graduated magna cum laude from the University of Oregon, earning a Bachelor of Science degree in chemistry. He received his medical degree from Oregon Health Sciences University. He performed his internship in internal medicine at the University of Utah School of Medicine and residency in diagnostic radiology at the University Of Massachusetts School Of Medicine. He completed his cross-sectional imaging fellowship at the Brown School of Medicine in Providence, Rhode Island. Dr. Morich is board certified by the American Board of Radiology.

Dr. Morich is the current Director of Breast Imaging and Vice President.

SPECIALTIES
Cross-sectional Imaging

UNDERGRADUATE
University of Oregon

MEDICAL SCHOOL
Oregon Health Sciences University

RESIDENCY
University of Massachusetts School of Medicine

FELLOWSHIP
Cross-sectional imaging; Brown School of Medicine, Providence, Rhode Island

PAUL MORTLOCK, PAC

PAUL
                  MORTLOCK, PA

Paul has been working as an Interventional Radiology Physician Assistant, as a part of CIG, since the group's inception.  He has been practicing as an IR PA-C since graduating with his Masters degree from Augsburg College in Minneapolis, MN.  Paul's procedures are performed across the hospital: the Cath Lab, CT, Ultrasound, X-ray and occasionally a personal visit to the patient's hospital room.  Paul's passion is to help patients and their families, keep them informed, and feel cared for and comfortable during their procedures with him.  When not at work you are likely to find Paul spending time with his wife and new daughter.  He enjoys soccer, disc golf, hiking, biking and gardening.

SPECIALTY
Interventional Radiology

COLLEGE
Dordt College, Sioux Center, Iowa

Medical School
Augsburg College Minneapolis, Minnesota

AMAR PURANDARE, MD

AMAR PURANDARE, MD

Dr. Amar Purandare earned his Bachelor of Science degree in Physics at SUNY at Stonybrook in Stonybrook, New York. Dr. Purandare is board certified by the American Board of Radiology and maintains a Certificate of Added Qualification (CAQ) in Neuroradiology. Prior to joining Columbia Imaging Group, Dr. Purandare was an Assistant Professor at Oregon Health Science University in Portland, Oregon.

Dr. Purandare is the current Executive Treasurer of CIG and is proud to be a staff physician for PeaceHealth Southwest Medical Center.

SPECIALTY
Neuroradiology

UNDERGRADUATE
SUNY at Stonybrook, Stonybrook, New York

MEDICAL SCHOOL
Ross University School of Medicine

INTERNSHIP
Saint Francis Medical Center

RADIOLOGY RESIDENCY
University of Pittsburgh Medical Center

FELLOWSHIP
Neuroradiology Fellowship, Oregon Health Science University, Portland, Oregon

LAWRENCE ROSE, MD

LAWRENCE ROSE, MD

Dr. Lawrence Rose earned his Bachelor of Science degree in biology at Loyola Marymount University in Los Angeles, where he graduated cum laude. He performed an internship in internal medicine at Portsmouth Naval Hospital in Virginia. He served four years in the United States Navy and then completed his residency in Phoenix, Arizona. He completed his body imaging fellowship, which included six months of musculoskeletal training, in 1997. Prior to joining Columbia imaging group, Dr. Rose was a partner in Arizona State Radiology in Tucson, Arizona.  Dr. Rose is board certified by the American Board of Radiology.

Dr. Rose is the current President of CIG.

SPECIALTY
Cross-sectional Imaging

UNDERGRADUATE
Loyola Marymount University, Los Angeles, CA

MEDICAL SCHOOL
Georgetown University School of Medicine, Washington, DC

RESIDENCY
Joseph's Hospital and Medical Center, Phoenix

FELLOWSHIP
Cross-sectional imaging; Fletcher Allen Medical Center, Burlington, Vermont

JUDSON THRELKELD, MD

JUDSON THRELKELD, MD

Dr. Threlkeld specializes in interventional radiology. He also holds a master's in clinical gerontology from Baylor University. He has specialized training in kypho/vertebroplasty, radio frequency ablation (liver, adrenal, kidney and lung), interventional pain, uterine fibroid embolization, and varicose vein treatment.

Dr. Threlkeld is a past President and a founding member of CIG.  He is currently the Chair of Interventional Radiology.

SPECIALTY
Interventional Radiology

UNDERGRADUATE
Baylor University, Waco, Texas

MEDICAL SCHOOL
University of Texas Medical Branch, Galveston, Texas

RESIDENCY
Sacred Heart Medical Center, Spokane, Washington

FELLOWSHIP
University of Mississippi Hospitals; Angio/interventional, Jackson, Mississippi

JUDY PALAZZO

JUDY
                  PALAZZO

Business Operations Administrator

Judy Palazzo joined Columbia Imaging Group in 2009. Judy has over 20 years in office management with experience in the banking, construction and manufacturing fields. In her role with CIG Judy manages the business office, physicians credentialing, Human Resources, Shareholder and Corporate administration. Judy loves to travel both nationally and internationally to explore new places and experience new cultures. She also enjoys her stained glass hobby.

JOHANNA JUHNKE

JOHANNA JUHNKE

Johanna is Columbia Imaging Group’s Staff Accountant. She joined Columbia in 2009 bringing with her over 20 years of experience. She graduated from Western Business College with a Certificate in Accounting and is also a Certified Bookkeeper. In her spare time she looks forward to volunteering with her newly certified therapy dog.

JUDSON THRELKELD, MD

JUDSON THRELKELD, MD

Dr. Threlkeld specializes in interventional radiology. He also holds a master's in clinical gerontology from Baylor University. He has specialized training in kypho/vertebroplasty, radio frequency ablation (liver, adrenal, kidney and lung), interventional pain, uterine fibroid embolization, and varicose vein treatment. He is currently holds the office of President at Columbia Imaging Group.  Dr. Threlkeld is board certified by the American Board of Radiology and maintains a Certificate of Added Qualification (CAQ) in interventional radiology.

Dr. Threlkeld is the current Chief of Interventional Radiology.

SPECIALTY(S)
Interventional Radiology

UNDERGRADUATE
Baylor University, Waco, Texas

MEDICAL SCHOOL
University of Texas Medical Branch, Galveston, Texas

RESIDENCY
Sacred Heart Medical Center, Spokane, Washington

FELLOWSHIP
University of Mississippi Hospitals; Angio/interventional, Jackson, Mississippi.