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  2. External beam radiotherapy - Wikipedia

    en.wikipedia.org/wiki/External_beam_radiotherapy

    Superficial radiation therapy machines produce low energy x-rays in the same energy range as diagnostic x-ray machines, 20–150 keV, to treat skin conditions. [3] Orthovoltage X-ray machines produce higher energy x-rays in the range 200–500 keV. Radiation from orthovoltage x-ray machines has been called "deep" due to its greater penetrating ...

  3. Radiation therapy - Wikipedia

    en.wikipedia.org/wiki/Radiation_therapy

    Historically conventional external beam radiation therapy (2DXRT) was delivered via two-dimensional beams using kilovoltage therapy X-ray units, medical linear accelerators that generate high-energy X-rays, or with machines that were similar to a linear accelerator in appearance, but used a sealed radioactive source like the one shown above.

  4. Ohio State East Hospital - Wikipedia

    en.wikipedia.org/wiki/Ohio_State_East_Hospital

    The hospital as St. Anthony's, 1903. The site was formerly a brickyard before the first medical facility was constructed there. The Sisters of the Poor of St. Francis began construction of St. Anthony's Hospital there in 1890; the Sisters had already been operating St. Francis Hospital (present-day Grant Medical Center), though overcrowding and demand on the East Side propelled the decision to ...

  5. Radiation treatment planning - Wikipedia

    en.wikipedia.org/wiki/Radiation_treatment_planning

    Doctor reviewing a radiation treatment plan. In radiotherapy, radiation treatment planning (RTP) is the process in which a team consisting of radiation oncologists, radiation therapist, medical physicists and medical dosimetrists plan the appropriate external beam radiotherapy or internal brachytherapy treatment technique for a patient with cancer.

  6. Waters' view - Wikipedia

    en.wikipedia.org/wiki/Waters'_view

    Waters' view (also known as the occipitomental view or parietoacanthial projection) is a radiographic view of the skull. It is commonly used to get a better view of the maxillary sinuses. An x-ray beam is angled at 45° to the orbitomeatal line. The rays pass from behind the head and are perpendicular to the radiographic plate.

  7. Therac-25 - Wikipedia

    en.wikipedia.org/wiki/Therac-25

    Megavolt X-ray (or photon) therapy, which delivered a beam of 25 MeV X-ray photons. The X-ray photons are produced by colliding a high current, narrow beam of electrons with a tungsten target. The X-rays are then passed through a flattening filter, and then measured using an X-ray ion chamber. The flattening filter resembles an inverted ice ...

  8. Particle therapy - Wikipedia

    en.wikipedia.org/wiki/Particle_therapy

    The most common type of particle therapy as of August 2021 is proton therapy. [1] In contrast to X-rays (photon beams) used in older radiotherapy, particle beams exhibit a Bragg peak in energy loss through the body, delivering their maximum radiation dose at or near the tumor and minimizing damage to surrounding normal tissues.

  9. Radiosurgery - Wikipedia

    en.wikipedia.org/wiki/Radiosurgery

    A linear accelerator (linac) produces x-rays from the impact of accelerated electrons striking a high z target, usually tungsten. The process is also referred to as "x-ray therapy" or "photon therapy." The emission head, or "gantry", is mechanically rotated around the patient in a full or partial circle. The table where the patient is lying ...

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