What is Proton Therapy

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Doctors

Meet Our Dedicated Doctors.

The radiation oncologists who provide clinical care at the Center are all faculty of the University of Washington Department of Radiation Oncology. They will plan your course of therapy, manage your clinical care and conduct weekly check-ups to ensure that the treatment is on track. At the end of your treatment, they will also provide you and your physician with a concise treatment summary.

Having trained at some of the best cancer centers in the country, including UW Medicine, Harvard, MD Anderson, University of Pennsylvania, Stanford, Georgetown and Johns Hopkins, the radiation oncologists at the UW Department of Radiation Oncology are leaders in the field and are known for clinical excellence as well as research in cancer care.

With specializations in brain, head and neck, breast, lung, gastrointestinal, genitourinary, prostate and pediatric cancers, our physicians have the expertise to provide the highest level of medical care to patients.

Ramesh Rengan, MD PhD

“In order to be successful in caring for the patient, a partnership must be forged between the oncologist and the patient, with each contributing to the development of a treatment plan that speaks to all of the needs of the patient.”

Ramesh Rengan, MD PhD

Lung Cancer; Ocular Cancers

Dr. Rengan is the Medical Director at the SCCA Proton Therapy Center, a Professor and the Chair of radiation oncology at UW Medicine, and a Member of the Clinical Research Division at the Fred Hutchinson Cancer Research Center, as well as a faculty member of the Immunotherapy Integrated Research Center. He is a board-certified radiation oncologist who specializes in radiation treatment for lung, melanoma, and prostate cancer.

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Jing Zeng, MD

“Ultimately, the patient chooses the treatment path, but it is my duty to ensure that patients have all the information needed to feel confident in the decision.”

Jing Zeng, MD

Lung Cancer; Prostate Cancer

Dr. Zeng is the Associate Medical Director at SCCA Proton Therapy Center, and a board-certified radiation oncologist who leads the prostate cancer program at the Center. She also specializes in treating lung cancer and other thoracic malignancies and has helped build the thoracic radiation oncology program at UW Medicine. Dr. Zeng is an Associate Professor of Radiation Oncology at the University of Washington and helps develop clinical and research initiatives exploring the application of proton therapy in cancer therapy.

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Specializations

Lung Cancer
Prostate Cancer
Smith Apisarnthanarax, MD

“As a radiation oncologist, my goal is to guide patients through this difficult time by providing the most compassionate, personalized care possible and making sure they have access to the latest, innovative clinical trials and state-of-art technology.”

Smith Apisarnthanarax, MD

Gastrointestinal Cancers; Prostate Cancer

Dr. Apisarnthanarax is a board-certified radiation oncologist with expertise in proton therapy who specializes in gastrointestinal cancers, including liver, pancreas and rectal cancers, as well as prostate cancer.. He is an Associate Professor of Radiation Oncology and serves as the Clinical Research Director in Radiation Oncology as well as the Associate Residency Program Director and Proton Fellowship Director at the University of Washington.

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Jonathan Chen, MD PhD

“I know what it's like for a loved one to be a patient: scared, in the dark, vulnerable, and anxious. That's why I always strive to give each patient the same compassion, patience, time, and personal care that I would want a doctor to give to my family.”

Jonathan Chen, MD PhD

Prostate Cancer; Ocular Cancer

Dr. Chen is a radiation oncologist with expertise in proton therapy who specializes in prostate cancer and ocular melanoma. He is an Assistant Professor of Radiation Oncology at the University of Washington.

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Brandon Dyer, MD

“Many of the diseases I treat are curable; it’s so rewarding to follow up with patients and see that they have moved on with their lives.”

Brandon Dyer, MD

Gynecological Cancers

Dr. Dyer is a radiation oncologist who specializes in treating gynecologic malignancies, such as cervical, endometrial (uterine), ovarian, vaginal, vulvar or urethral cancers. Dr. Dyer serves as the chief of gynecologic oncology radiation services and the gynecologic brachytherapy lead at Seattle Cancer Care Alliance. He is also an Assistant Professor at the University of Washington Department of Radiation Oncology. 

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Ralph P. Ermoian, MD

“I want to provide the same care that I would want and expect of my own health-care providers if I had cancer: compassionate, detail-oriented, and patient-centered care that is tailored to the patient’s medical needs and goals.”

Ralph P. Ermoian, MD

Childhood Cancers

Dr. Ermoian is board-certified in radiation oncology and also completed a residency program in pediatrics. He is an Associate Professor of Radiation Oncology at the University of Washington, with expertise in proton therapy.

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Specializations

Childhood Cancers
L. Christine Fang, MD

"I consider it a great privilege to be a part of my patients' lives during the course of their cancer treatment - a time that can be full of anxiety, fear and challenges. I strive to deliver the level of compassion, understanding, patience and medical expertise and skill that I would insist upon for my own loved ones."

L. Christine Fang, MD

Breast and Gynecological Cancers

Dr. Fang is a board-certified radiation oncologist with expertise in proton therapy who specializes in breast cancer. She is also an Associate Professor of Radiation Oncology at the University of Washington.

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Specializations

Breast Cancer
Lia Moriguchi Halasz, MD

“To me, being a physician means not only treating the disease, but supporting my patients’ strength, hope, and recovery.”

Lia Moriguchi Halasz, MD

Brain and Central Nervous System Cancers

Dr. Halasz is board certified in radiation oncology with expertise in proton therapy, and she cares for patients with brain and spinal cord tumors. Dr. Halasz is an Associate Professor of Radiation Oncology as well as Neurological Surgery at the University of Washington. She is the co-director of the UW Alvord Brain Tumor Center.

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Edward Y. Kim, MD

“I believe in individualized care and making decisions with my patients as a partnership.”

Edward Y. Kim, MD

Sarcomas and Gastrointestinal Cancers

Dr. Kim is a board-certified radiation oncologist with expertise in proton therapy. Dr. Kim specializes in sarcomas and gastrointestinal cancers. He is an Associate Professor of Radiation Oncology at the University of Washington. Prior to joining Seattle Cancer Care Alliance, Dr. Kim was on faculty at the Ohio State University Arthur James Comprehensive Cancer Center.

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Specializations

Gastrointestinal Cancers
George E. Laramore, MD PhD FACR FASTRO

“High tech medicine can be adapted to the individual patient's needs. I enjoy using the latest technological innovations in radiation oncology to design and carry out the optimal treatment for each patient.”

George E. Laramore, MD PhD FACR FASTRO

Head and Neck Cancers; Prostate Cancer

Dr. Laramore is the past Medical Director of SCCA Proton Therapy Center and the past Chair of the Department of Radiation Oncology at the University of Washington. Dr. Laramore is board certified in therapeutic radiology and radiation oncology with expertise in proton therapy, and is the Peter Wootton Professor of Radiation Oncology at the University of Washington. He has pioneered work in neutron radiotherapy and specializes in the treatment of salivary gland tumors, head and neck cancers, and prostate cancer.  

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Jay J. Liao, MD

“I enjoy establishing strong relationships with my patients, providing individualized and compassionate care, and educating patients about their disease process and treatment.”

Jay J. Liao, MD

Head and Neck Cancers; Prostate Cancer

Dr. Liao is a board-certified radiation oncologist with expertise in proton therapy. Dr. Liao treats salivary gland tumors, head and neck cancer, skin cancer and genitourinary cancers such as prostate. He also specializes in fast neutron radiotherapy. He is an Associate Professor of Radiation Oncology at the University of Washington.

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Simon Lo, MB ChB FACR FASTRO

“I believe all patients deserve compassionate and the best medical care. My aim is to provide the best possible treatment for my patients, and provide education and support to my patients and their families, so they don’t have to face this journey alone.”

Simon Lo, MB ChB FACR FASTRO

Brain and Central Nervous System Cancers

Dr. Lo is a radiation oncologist with expertise in brain tumors, spine tumors, and all other tumors in the central nervous system (CNS). He also specializes in Gamma Knife, Stereotactic Body Radiotherapy, and Stereotactic Radiosurgery. He is a Professor and Vice Chair of Strategic Planning at the University of Washington Department of Radiation Oncology. 

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Nina Mayr, MD FASTRO FAAAS

“Regardless of what we do in medicine: clinical care, education, research... It all serves just one purpose: to create the best treatment for our cancer patients.”

Nina Mayr, MD FASTRO FAAAS

Breast and Gynecological Cancers

Dr. Mayr is a board-certified radiation oncologist and Professor and past Chair of the Department of Radiation Oncology at the University of Washington. Prior to joining Seattle Cancer Care Alliance, Dr. Mayr created the Department of Radiation Medicine at Ohio State University and served as its inaugural Chair. There she was also a member of the NCI-designated Comprehensive Cancer Center’s Experimental Therapeutics Program.

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Specializations

Breast Cancer
Upendra Parvathaneni, MBBS, FRANZCR

“My philosophy is to treat my patients as I would like to be treated.”

Upendra Parvathaneni, MBBS, FRANZCR

Head and Neck Cancers; Melanoma

Dr. Parvathaneni is board certified in radiation oncology in Australia and the United States. He is the Head of the Head-and-Neck Radiation Oncology Program and an Associate Professor of Radiation Oncology at the University of Washington. He specializes in the treatment of Head and Neck cancers, Merkel cell cancers, complex skin cancers, melanomas, salivary gland tumors, rare malignancies, and re-irradiation. He has expertise in proton therapy, IMRT, neutron therapy, IORT and IGRT.

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Specializations

Head & Neck Cancers
Jason K. Rockhill, MD PhD

“Being diagnosed with a brain tumor strikes at the very core of an individual. My role is to provide the best possible support so they do not have to journey alone.”

Jason K. Rockhill, MD PhD

Brain and Central Nervous System Cancers

Dr. Rockhill is a board-certified radiation oncologist with expertise in proton therapy who specializes in cancers of the brain and nervous system. He is a Professor of Radiation Oncology at the University of Washington, and the Director of CNS Oncology Service at Harborview for both Radiation Oncology and Neurosurgery. 

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Yolanda Tseng, MD

“I feel privileged to be part of a team that provides the best care for our patients. I’m always impressed by my patients’ strength during a stressful and uncertain period of their lives. The care we provide—clinical, emotional, and personal—is one of the most gratifying aspects of being an oncologist.”

Yolanda Tseng, MD

Central Nervous System Cancers; Lymphoma

Dr. Tseng is a board-certified radiation oncologist with training and experience in proton radiotherapy, focusing on lymphoma and primary brain and spine tumors. She serves as an Assistant Professor of Radiation Oncology at the University of Washington. Her diverse research includes how physicians estimate patient prognosis and its effects on treatment decisions, and how tumor biological subtypes affect patient outcomes and the response to local therapy. She’s interested in systematically evaluating how proton radiotherapy can be used to optimize patient care.

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