megavoltage वाक्य
उदाहरण वाक्य
मोबाइल
- Megavoltage x-rays also have higher relative biological effectiveness than orthovoltage x-rays.
- Megavoltage X-rays are by far most common in radiotherapy for treatment of a wide range of cancers.
- Megavoltage x-ray units were first built in the late 1930s but because of cost were limited to a few institutions.
- These properties help to make megavoltage x-rays the most common beam energies typically used for radiotherapy in modern techniques such as IMRT.
- The technique was largely abandoned in the late 1950s with the advent of megavoltage radiation equipment, which enabled the delivery of more penetrating external radiation.
- By the 1930s and 1940s megavoltage X-rays produced by huge machines with 3-5 million volts on the tube, began to be employed.
- Megavoltage x-rays are preferred for treatment of deep lying tumours as they are attenuated less than lower energy photons, and will penetrate further, with a lower skin dose.
- There are lumpectomies to cut out tumors, mastectomies to cut off diseased breasts, megavoltage radiation to zap cancer cells, high-dose chemotherapy to wipe out bad cells _ and good ones _ with toxic chemicals.
- "' Megavoltage X-rays "'are produced by linear accelerators ( " linacs " ) operating at voltages in excess of 1000 kV ( 1 MV ) range, and therefore have an energy in the MeV range.
- With megavoltage x-rays ( gamma rays ) used for clinical radiotherapy ( cancer treatment ), traces of short-lived radioisotopes can be generated in the treatment room and their activity will persist for a few seconds after the beam goes off . ( Typically the time required to open the room door or navigate the maze entry is sufficient to allow the bulk of these radionuclides to decay .)
- It would be relatively simple to design and build a Capacitor Man superhero suit, as long as you weren't intimately wedded to skintight spandex . ( There's no magic bullet here . ) I'll note in reply to Keenan Pepper's remark that you'll hold a kilovoltage charge for a fair while in dry air, but a megavoltage charge ( such that you might get from a Van de Graff generator ) will tend to very quickly bleed down even in dry air . talk ) 16 : 22, 24 June 2006 ( UTC)
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