Treatment of Cancer with Radiation Therapy

Memorial Radiation Oncology is the clinic on the Memorial Medical Center Campus that specializes in the treatment of cancer with radiation therapy.  Many cancer patients will undergo radiation therapy as a part of their cancer treatment. 

We have the Medical Expertise and State-of-the-Art Technology to treat:

  • Prostate Cancer
  • Breast Cancer 
  • Lung Cancer 
  • Rectal and Gastrointestinal Cancer
  • Skin Cancer
  • Head and Neck Cancer
  • Brain Tumors and Cancer
  • Gynecologic Cancer
  • Lymphoma
  • Most Other Types of Adult Cancer

Services Provided

  • Radiation Oncology Consultation and Follow-up Appointments
  • 3D Conformal External Beam Radiation Therapy
  • IMRT (Intensity Modulated Radiation Therapy)
  • IGRT (Image Guided Radiation Therapy)
  • SBRT (Stereotactic Body Radiation Therapy)
  • HDR Brachytherapy
  • Radiopharmaceutical Treatments
  • Participation in Clinical Trials

Commitment to Quality

We strive for excellence, and Our program is accredited by the American College of Radiology.  As a part of the Memorial Cancer Center, we are also accredited by the Commission on Cancer (COC) through the American College of Surgeons (ACOS).

In 2016, Memorial Medical Center invested in the most up-to-date technology available for our Tomotherapy Hi-Art Radiation Therapy treatment system.

In 2018 we completed a major expansion and remodel of our clinic, for the comfort and convenience of our patients.  In addition, we added the Varian Edge® Radiosurgery System.  This cutting-edge technology allows us to provide treatments to our patients utilizing SBRT (Stereotactic Body Radiation Therapy) techniques. This cutting-edge technology allows us to administer exceptionally accurate radiation therapy, breaking down tumors in less than an hour per session. Click here to read more.

Your Physicians

Jason Call, MD 

Dr. Call pursued his medical school training at the Medical College of Wisconsin and his residency training in Radiation Oncology at the Mayo Clinic in Rochester, MN.  He has been active in research throughout his career, publishing his work in several scientific journals.  He has presented his research at national and international oncology meetings and has authored published book chapters on topics related to Radiation Oncology.

His training at the Mayo Clinic included modern radiation techniques, focusing on Intensity-Modulated Radiation therapy (IMRT), Image-Guided Radiation Therapy (IGRT), Stereotactic Radiosurgery (SRS), Stereotactic Body Radiation Therapy (SBRT), and High Dose Rate (HDR) brachytherapy. Dr. Call most recently worked at Alaska Cancer Treatment Center in Anchorage Alaska.

Voted BEST Oncologist in 2021 Bulletin's Best of the Mesilla Valley.


Gregory S. Willis, MD

Dr. Willis is a Board Certified Radiation Oncologist who comes to Las Cruces with more than a decade of experience practicing radiation oncology. He was raised in Southern California and Hawaii.  He practiced in Minnesota and Oregon before joining Memorial Radiation Oncology in 2016.

Dr. Willis earned his M.D. at Oregon Health Sciences University.  He completed his residency in Radiation Oncology at the University of Minnesota.


Your Treatment Team 

Care is provided by Board Certified Radiation Oncology Physicians and other professionals, specially trained in the use of radiation therapy for the treatment of cancer:

Radiation Therapists:  Specialists trained in the delivery of radiation therapy treatment, under the direction of the radiation oncologist.

Dosimetrists and Medical Physicists: Highly skilled professionals who are responsible for calculating doses of radiation and calibrating radiation equipment.

Radiation Oncology Nurses: Experts in the care of patients undergoing radiation therapy.

Office Staff: People dedicated to helping with scheduling, billing, and administrative tasks.

Social Worker/Navigator:  Professionals trained in assisting with social, emotional, and transportation issues.  In addition, they help in the coordination of care with other specialists.

Radiation Therapy Treatment Process

The decision about which treatments to use is based on each patient’s situation.  Every patient’s treatment is individualized.

Radiation therapy treatment can consist of external beam radiation therapy or brachytherapy (internal radiation therapy). 

At our facility, external beam radiation therapy is delivered with the Tomotherapy® Hi-Art® Treatment System or our new Varian Linear Accelerator, The Edge®. Read more about our upgrade to the newest technology in non-invasive treatment with The Edge®.

How often will I have treatments?

The number and duration of your treatments will be determined by your radiation oncologist.  After reviewing your medical history, the radiation oncologist will meet with you and discuss proposed treatments, including potential risks and benefits.

Generally, treatments last from 20-30 minutes and are given daily, Monday through Friday.  They are given over a period of time that may last from a few days to many weeks.

What is a Simulation?

Prior to receiving radiation therapy, you will have a planning appointment called a simulation.  During this appointment, your radiation oncologist and radiation therapist will perform the necessary tests that will allow them to customize your treatment. Your actual treatment usually starts a few days after the simulation, in order for the team to optimize your treatment plan.

What are the side effects?

Some patients experience side effects from radiation therapy.  Side effects depend on the area of the body being treated.  We have effective treatment for most side effects.  Many patients are able to continue their normal day-to-day activities.


TomoTherapy Brochure (12 pages)

NCI (National Cancer Institute) Brochures, Pamphlets, Booklets:

Radiation Therapy and You (62 pages)

Helpful Websites

For more information on radiation therapy treatments, click here.

For more information on Cancer, click here.

Contact Information

Memorial Radiation Oncology

2450 S. Telshor Blvd., Suite B
Las Cruces, New Mexico 88011

Phone:  575.556.5800
Fax:  575.556.5899