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grenz rays การใช้

ประโยคมือถือ
  • Grenz rays are absorbed by air and therefore treatments must be given at fixed distances for which the machine has been calibrated.
  • Grenz rays have a half-value depth of 0.5 mm and are essentially absorbed within the first 2 mm of skin.
  • Since then, she has undergone treatment with oral and topical cortisone, Grenz rays, ultrasound, and later acupuncture, without relief.
  • In the very elderly or those with otherwise limited life expectancy, the impact of major day surgery for excision with 5mm margins and large skin flap could be worse than the outcome of watchful waiting or the possibiity of failed treatments with Imiquimod or Grenz ray.
  • Grenz rays are produced by specially calibrated X-ray machines generally operating in the 10 to 30 kV range to produce X-rays with HVL less than 0.035 mm Al . ( HVL is half-value layer, and refers to a thickness of a given material that will cut the X-ray flux by 50 % ).