megavoltage meaning in Hindi

Examples

1. Megavoltage x-rays also have higher relative biological effectiveness than orthovoltage x-rays.
2. Megavoltage X-rays are by far most common in radiotherapy for treatment of a wide range of cancers.
3. Megavoltage x-ray units were first built in the late 1930s but because of cost were limited to a few institutions.
4. These properties help to make megavoltage x-rays the most common beam energies typically used for radiotherapy in modern techniques such as IMRT.
5. 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.
6. By the 1930s and 1940s megavoltage X-rays produced by huge machines with 3-5 million volts on the tube, began to be employed.
7. 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.
8. 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.
9. "' 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.
10. 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 .)