St. Joseph Hospital of Orange
1100 West Stewart Dr, Orange, CA 92868714.633.9111
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Radiation Oncology

Radiation Therapists

The radiation therapists are integral members of the radiation oncology team. They are highly trained, certified healthcare professionals specializing in radiation treatment delivery. They are certified by the American Registry of Radiologic Technologist (ARRT), and licensed by the state of California (CRT).

The primary responsibility of the radiation therapist is to accurately deliver the treatment prescribed by the radiation oncologist. The therapist accomplishes this by positioning the patient accurately and administering the radiation treatment on the linear accelerator on a daily basis. The advantage of working with a familiar face on a daily basis becomes evident in the patient-therapist professional relationship, through daily communication.

St. Joseph Hospital Radiation Therapists


Brenda Gonzales, R.T., (R) (T), A.S.
Radiation Therapy Lead


John Van Aggelen, R.T., (T), B.S.
Assistant Radiation Therapy Lead
Safety Officer

Education
1993 – Radiation Therapist Certificate, Loma Linda University, Loma Linda, CA
1992 – A.S., Chaffey College, Rancho Cucamonga, CA

Certification
State of California Radiation Therapist, 1993
State of California Radiologic Technologist, 1992
American Registry of Radiologic Technologists, 1992

Education
1998 – B.S., California State University Long Beach, Long Beach, CA

Certification
State of California Radiologic Therapist, 1998
American Registry of Radiologic Technologists, 1999


Lynda Bellmyer, R.T., (T), A.S.


Rafael Campos, R.T., (T), B.S.

Education
1989 – A.S., Orange Coast College, Costa Mesa, CA

Certification
State of California Radiologic Technologist, 1989
American Registry of Radiologic Technologists, 1989

Education
2005 – B.S., California State University Long Beach, Long Beach, CA

Certification
State of California Radiation Therapist, 2005


Tanya Chavez, R.T., (T), B.S.


Theresa Hoffman R.T., (R)(T), B.S., M.B.A.

Education
2008 – B.S., California State University Long Beach, Long Beach, CA

Certification
State of California Radiation Therapist, 2008

Education
2000 – M.B.A., Fontboone University, St. Louis, MO
1993 – B.S., Southern Illinois University, Carbondale, IL
1991 – Radiation Therapy Certificate, Washington University
1990 – A.S., Belleville Area College, Belleville, IL

Certification
State of California Radiologic Technologist, 2002
State of California Radiation Therapist, 2002
American Registry of Radiologic Technologists, 1991


Beverly Littleworth, R.T., (R) (T)


Liesa Ludke, R.T., (T), B.S.

Education
1983 – Certificate, University Hospital of San Diego
1981 – A.S., Orange Coast College, Costa Mesa, CA

Certification
State of California Radiologic Technologist, 1981
State of California Radiation Therapist, 1983

Education
2007 – B.S., California State University Long Beach, Long Beach, CA

Certification
State of California Radiologic Therapist, 2007
American Registry of Radiation Technologist, 2007


John Seward, R.T., (T), B.S.


Hoang Tran, R.T., (T), B.S.

Education
2007 – B.S., California State University Long Beach, Long Beach, CA

Certification
State of California Radiologic Therapist, 2007
American Registry of Radiologic Technologists, 2007

Education
2011 – B.S., California State University Long Beach, Long Beach, CA

Certification
State of California Radiologic Therapist, 2011
American Registry of Radiologic Technologists, 2011


Kerry Weyrick, R.T., (T), B.S.

Education
1995 – B.S., California State University Long Beach, Long Beach, CA

Certification
State of California Radiologic Therapist, 1995
American Registry of Radiologic Technologists, 1995