Radiation oncology uses radiologic imaging to diagnose all types of cancer and tumors in patients and then uses the imaging to treat the patients with radiation. A radiation oncologist is a radiologist who may use diagnostic tools such as x-rays, ultrasound, MRI (Magnetic Resonance Imaging), and a CT scan (Computed Tomography) to help diagnose the disease and then develop a treatment plan for the patient. This specialist uses the diagnostic plan to treat patients with external beam radiation or internal radiation which is also known as brachytherapy. The radiation oncologist also consults with other physicians, such as medical oncologists and
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