 | 1963 - 78 lapas
...The exposure (X) is the quotient of AQ by Am, where AQ is the sum of the electrical charges on all the ions of one sign produced in air when all the...positrons), liberated by photons in a volume element of air whose mass is Am, are completely stopped in air and A has the meaning indicated in section 4.A. V _... | |
 | 1996 - 672 lapas
...image receptor during normal use; (ii) Which is equipped with means for patient restraint; and (iii) Which is capable of rotation about its long (longitudinal)...equipment means equipment which uses an x-ray tube in §1020.30 which electron emission from the cathode is due solely to action of an electric field. Fluoroscopic... | |
 | 1996 - 700 lapas
...support structure is interposed between the patient and the image receptor during normal use; (ii) Which is equipped with means for patient restraint;...photons in a volume element of air having mass dm are complete!/ stopped in air. Field emission equipment means equipment which uses an x-ray tube ctron... | |
 | 1988 - 590 lapas
...section, inflexible hardware rigidly affixed to the door shall be considered part of the door. (5) "Exposure" means the quotient of dQ by dm where dQ...air having mass dm are completely stopped in air. (6) "External surface" means the outside surface of the cabinet x-ray system, including the high-voltage... | |
 | International Commission on Radiological Units and Measurements - 1962 - 24 lapas
...The exposure (X) is the quotient of AQ by Am, where AQ is the sum of the electrical charges on all the ions of one sign produced in air when all the...positrons), liberated by photons in a volume element of air whose mass is Am, are completely stopped in air and Д has the meaning indicated in section 4.A. JT-fi... | |
 | 1978 - 448 lapas
...that from the time of intake the period of exposure to retained material will not exceed 50 years. (n) *"Exposure" means the quotient of dQ by dm where "dQ"...air having mass "dm" are completely stopped in air. (The special unit of exposure is the roentgen (R).) "Note: States may wish to distinguish throughout... | |
 | Health Physics Society. Committee for Upgrading Environmental Radiation Data - 1980 - 126 lapas
...temporary sanction was provided to allow time for familiarization with the new units. Exposure , X, is the quotient of dq by dm where dq is the absolute...positrons) liberated by photons in a volume element of air . dm The SI unit for exposure is coulomb per kilogram (C-kg~l). The familiar unit for exposure is the... | |
 | 1982 - 88 lapas
...human body for the purpose of diagnosis or visualization. (13) "Equipment" means x-ray equipment. (14) "Exposure" means the quotient of dQ by dm where dQ...air having mass dm are completely stopped in air. (15) "Field emission equipment" means equipment which uses an x-ray tube in which electron emission... | |
 | 1985 - 32 lapas
...means the dose as a function of position along a line. (13) "Equipment" means x-ray equipment. (14) "Exposure" means the quotient of dQ by dm where dQ...air having mass dm are completely stopped in air. (15) "Half-value layer, HVL" means the thickness of specified material which attenuates the beam of... | |
 | 1985 - 36 lapas
...limit of which is determined by the design of the x ray system. 8. "Exposure" means the quotient of dp by dm where dQ is the absolute value of the total...air having mass dm are completely stopped in air. 9. "External surface" means the outside surface of the cabinet x-ray system, including the high voltage... | |
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Exposure means the quotient of dQ by dm where dQ is the absolute value of the total charge of the ions of one sign produced in air when all the electrons (negatrons and positrons) liberated by photons in a volume element of air having mass dm are completely... 
