We are a foremost authority on radiation treatment.
The doctors, nurses, radiation specialists, and technicians who provide your radiation therapy in the UI Department of Radiation Oncology are professionals at the top of their field. Not only do they deliver this high level of care to hundreds of patients each year, they also are at the forefront of their discipline, pioneering new and more effective means to deliver your care safely and accurately.
Here’s why Iowa should be your radiation therapy choice.
Our doctors, nurses, and therapists are not only experts in cancer care, they're compassionate when it comes to your wellbeing.
Our approach brings together specialists who focus on one or two types of cancer and who have expertise in chemotherapy, surgery, and radiation therapy.
Your care does not end when your treatment is over. Our cancer survivorship staff members help you cope with any side effects from the cancer and the cancer treatment.
Our catalog of treatment types is comprehensive. Many hospitals offer one or two types of radiation therapy. At Holden we offer many types of radiation therapy to best suit your specific needs. You have the confidence that we'll be using the treatment right for your condition.
Here’s what you can expect.
After seeing one of our doctors you will have a good idea of what to expect during treatment. Before then, we invite you to to view a 12-minute video for a behind-the-scenes look at radiation therapy care in our clinic.
Your care may include advanced treatment options.
Innovative treatments offered by our team include those specifically for breast cancer (accelerated partial breast irradiation, APBI), lung cancer (gated stereotactic radiation therapy) and prostate cancer (high-dose rate–HDR- brachytherapy) as well as more conventional treatments like IGRT and low-dose brachytherapy implants.
Meet the members of your radiation oncology team.
Radiation Oncology Physicians
![Bryan G. Allen](/sites/default/files/2024-11/allenbg.jpg)
Bryan G. Allen, MBA, MD, PhD
- Department Chair
- Professor
![Carryn Anderson](/sites/default/files/2024-02/cmndrsn.jpg)
Carryn Anderson, MD
- Clinical Professor
![John M. Buatti](/sites/default/files/2023-07/buattij.jpg)
John M. Buatti, MD
- Professor
James D. Byrne, MD, PhD
- Assistant Professor
![Joseph M. Caster](/sites/default/files/2024-11/caster-joseph_1.jpg)
Joseph M. Caster, MD, PhD
- Associate Professor
- Director of Imaged Guided Brachytherapy
![Yousef Ismael](/sites/default/files/2024-04/yismael.jpg)
Yousef Ismael, MD
- Clinical Assistant Professor of Radiation Oncology
Sami Koro, MD
- Clinical Assistant Professor
![Kristin A. Plichta](/sites/default/files/2023-01/plichtak.jpg)
Kristin A. Plichta, MD, PhD
- Clinical Assistant Professor
![William M. Rockey](/sites/default/files/2023-01/rockeyw.jpg)
William M. Rockey, MD, PhD
- Clinical Associate Professor
![Mark C. Smith](/sites/default/files/2024-05/smithmc.jpg)
Mark C. Smith, MD
- Clinical Professor
![Wenqing Sun](/sites/default/files/2023-01/sunwe.jpg)
Wenqing Sun, MD, PhD
- Clinical Associate Professor
Kailin Yang, MD, PhD
- Assistant Professor
Nurse Practitioner
Medical Physicists
![Adam M. Dalhart](/sites/default/files/2024-11/adalhart.jpg)
Adam M. Dalhart, MS
- Instructor
![Ryan T. Flynn](/sites/default/files/2023-01/rtflynn.jpg)
Ryan T. Flynn, PhD
- Clinical Professor
![Michelle Howard](/sites/default/files/2023-08/Howard~Michelle.jpg)
Michelle Howard, PhD
- Assistant Professor
![Daniel Hyer](/sites/default/files/2023-09/daniel_hyer.jpg)
Daniel Hyer, PhD
- Professor
![Joseph M. Modrick](/sites/default/files/2023-01/modrickj.jpg)
Joseph M. Modrick, PhD
- Clinical Assistant Professor
![Earl Nixon](/sites/default/files/2024-11/enixon.jpg)
Earl Nixon, MS
- Instructor
![Emma Rickels](/sites/default/files/2024-11/esrickels.jpg)
Emma Rickels, DMP
- Instructor
![Samuel Rusu](/sites/default/files/2024-11/srusu.jpg)
Samuel Rusu, MS
- Instructor of Radiation Oncology
![Blake Smith](/sites/default/files/2024-04/bsmith21.jpg)
Blake Smith, PhD
- Assistant Professor
![Joël J. St-Aubin](/sites/default/files/2024-04/st-aubin_uiowa.jpg)
Joël J. St-Aubin, PhD, FCCPM
- Clinical Associate Professor
![Timothy Waldron](/sites/default/files/2024-11/twaldron.jpg)
Timothy Waldron, MS
- Instructor
Wenjun Yang, PhD
- Clinical Assistant Professor