Radiation Oncology

21st Century Oncology provides state-of-the-art, academic quality radiation therapy and other cancer treatments.

Our treatment centers offer our patients a full spectrum of radiation therapy—which is used to treat the most common types of cancers, including prostate, breast, lung and colorectal. Radiation is either given externally or internally, and some cancers require both treatments. 21st Century Oncology uses the latest technology, including:

  • TrueBeam
  • RapidArc
  • Calypso
  • TomoTherapy
  • Trilogy
  • Mammosite

To learn more about 21st Century Oncology, visit www.21stcenturyoncology.com.

Image: Alan Brown, M.D. | Radiation Oncology - Southwest Florida Regional Cancer Center
Alan Brown, M.D.
Dr. Alan Brown earned his medical degree at the University of Michigan, and completed his postgraduate residency training in radiation oncology at Massachusetts General Hospital in Boston. He completed research in breast cancer incidence and age distribution in minorities and has done work with BOLD MR Imaging, which allows assessment of reductions in tumor oxygen supply. Dr. Brown specializes in conformal 3-D radiation therapy, intensity modulated radiation therapy (IMRT), stereotactic radiosurgery (SRS), proton irradiation, high dose rate brachytherapy and permanent brachytherapy (seed implants). He has a particular interest in central nervous system, gastrointestinal, genitourinary, lung and breast malignancies.
Image: Constantine Mantz, MD | Radiation Oncology - Southwest Florida Regional Cancer Center
Constantine A. Mantz, M.D.
Dr. Constantine Mantz earned his medical degree from the University of Chicago’s Pritzker School of Medicine and completed a surgical internship at the Hennepin County Medical Center in Minneapolis. Dr. Mantz completed a radiation oncology residency at the University of Chicago Hospitals. He is board certified in radiation oncology by the American Board of Radiology and is a member of the American College of Radiation Oncology, the American Medical Association, the American Society for Therapeutic Radiology and Oncology (ASTRO) and the Association of Freestanding Radiation Oncology Centers. Dr. Mantz has a special interest in the study and treatment of prostate cancer.
Image: Keith Miller, MD | Radiation Oncology - Southwest Florida Regional Cancer Center
Keith L. Miller, M.D.
Dr. Keith Miller earned his medical degree from the University of California, San Diego. Prior to completing a residency in radiation oncology at Duke University in Durham, N.C., Dr. Miller was trained in internal medicine and pulmonary and critical care. He is board certified in internal medicine, pulmonary and critical care, and radiation oncology. Dr. Miller is a Fellow of the American College of Chest Pain Physicians, a member of the American Society for Therapeutic Radiology and Oncology, the American Society of Clinical Oncology, the American Medical Association and the American College of Radiation Oncology.
Image: Dr. Mirabeau-Beale | Radiation Oncology - Southwest Florida Regional Cancer Center
Kristina Mirabeau-Beale, M.D.
Dr. Mirabeau-Beale is passionate about evidence-based medicine and maintaining patient quality of life during treatment. She earned her bachelor’s degree and medical doctorate from Harvard University, both with honors. She completed her residency training in radiation oncology at the Harvard Radiation Oncology Program, a joint program between Brigham and Women’s Hospital/Dana Farber Cancer Institute and Massachusetts General Hospital and earned a Masters of Public health degree during her training.
Image: Patient Care | Radiation Oncology - Southwest Florida Regional Cancer Center

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