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Dr. Cink began his diagnostic radiology practice in Sioux Falls in 1981. His sub specialty is breast cancer screening and diagnosis. He received his undergraduate degree from the University of South Dakota in Vermillion and his medical degree from the University of South Dakota School of Medicine in Sioux Falls. He interned and completed his residency in diagnostic radiology at the Los Angeles County/University of Southern California Hospital in Los Angeles and completed a fellowship in chest and breast imaging at the University of Colorado Health Sciences Center in Denver. 

During his career, Dr. Cink has served on many committees and boards. He has been president of Medical X-Ray Center, served on the executive committees of the group's main hospitals, and been president of the Alumni Board of Directors for Sanford USD School of Medicine.  Dr. Cink has chaired the Department of Radiology of the medical school.  He is a clinical professor of radiology, has published a number of research articles and continues to be involved in breast cancer research. 

After his fellowship in 1991, Dr. Cink, with the administration and key physicians at Sanford Hospital, started the Edith Sanford Breast Health Institute. Dr. Cink is Medical Director of BHI, which has had continued growth and today serves over 40,000 patients yearly for screening, diagnosis and management of breast cancer.  He is an active member of the Cancer Committee, Edith Sanford Clinical Committee, and the Edith 8.

Dr. Cink is certified in diagnostic radiology by the American Board of Radiology and is a member of the American College of Radiology, the Roentgen Ray Society, the Radiological Society of North America, the Society of Breast Imaging, the South Dakota State Medical Association, and the Seventh District Medical Society. He is a Fellow of the American College of Chest Physicians and is also a Fellow of the American College of Radiology.