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  2. Distributed Bragg reflector laser - Wikipedia

    en.wikipedia.org/wiki/Distributed_Bragg...

    A distributed Bragg reflector laser (DBR) is a type of single frequency laser diode. Other practical types of single frequency laser diodes include DFB lasers and external cavity diode lasers. A fourth type, the cleaved-coupled-cavity laser has not proven to be commercially viable.

  3. Lasers in cancer treatment - Wikipedia

    en.wikipedia.org/wiki/Lasers_in_Cancer_Treatment

    Lasers are used to treat cancer in several different ways. Their high-intensity light can be used to shrink or destroy tumors or precancerous growths. Lasers are most commonly used to treat superficial cancers (cancers on the surface of the body or the lining of internal organs) such as basal-cell skin cancer and the very early stages of some cancers, such as cervical, penile, vaginal, vulvar ...

  4. Proton therapy - Wikipedia

    en.wikipedia.org/wiki/Proton_therapy

    In medicine, proton therapy, or proton radiotherapy, is a type of particle therapy that uses a beam of protons to irradiate diseased tissue, most often to treat cancer.The chief advantage of proton therapy over other types of external beam radiotherapy is that the dose of protons is deposited over a narrow range of depth; hence in minimal entry, exit, or scattered radiation dose to healthy ...

  5. Distributed Bragg reflector - Wikipedia

    en.wikipedia.org/wiki/Distributed_Bragg_reflector

    Time-resolved simulation of a pulse reflecting from a Bragg mirror. A distributed Bragg reflector (DBR) is a reflector used in waveguides, such as optical fibers.It is a structure formed from multiple layers of alternating materials with different refractive index, or by periodic variation of some characteristic (such as height) of a dielectric waveguide, resulting in periodic variation in the ...

  6. Particle therapy - Wikipedia

    en.wikipedia.org/wiki/Particle_therapy

    From a radiation biology standpoint, there is considerable rationale to support use of heavy-ion beams in treating cancer patients. All proton and other heavy ion beam therapies exhibit a defined Bragg peak in the body so they deliver their maximum lethal dosage at or near the tumor. This minimizes harmful radiation to the surrounding normal ...

  7. Radiation therapy - Wikipedia

    en.wikipedia.org/wiki/Radiation_therapy

    Most side effects are predictable and expected. Side effects from radiation are usually limited to the area of the patient's body that is under treatment. Side effects are dose-dependent; for example, higher doses of head and neck radiation can be associated with cardiovascular complications, thyroid dysfunction, and pituitary axis dysfunction ...

  8. Distributed-feedback laser - Wikipedia

    en.wikipedia.org/wiki/Distributed-feedback_laser

    A distributed-feedback laser (DFB) is a type of laser diode, quantum-cascade laser or optical-fiber laser where the active region of the device contains a periodically structured element or diffraction grating. The structure builds a one-dimensional interference grating (Bragg scattering), and the grating provides optical feedback for the

  9. List of unproven and disproven cancer treatments - Wikipedia

    en.wikipedia.org/wiki/List_of_unproven_and...

    Chaparral (or Larrea tridentata) – a plant used to make a herbal remedy which is sold as cancer treatment. Cancer Research UK state that: "We don't recommend that you take chaparral to treat or prevent any type of cancer." [67] Chlorella – a type of algae promoted for its health-giving properties, including a claimed ability to treat cancer ...