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Filtration of useful beam from
X-ray machine used for flooroscopy.
Marking of protective housing of X-ray tubes.
Restriction
on radiation from telo- vision sets.
(4) No licensee shall use any protective material, other than sheet lead, which is not marked in accordance with the provisions of para- graph (2) or paragraph (3).
(5) Nothing in this regulation shall be construed to prevent the temporary removal from the address stated in the licence relating thereto of any portable or mobile irradiating apparatus incidental to its opera- tion as such.
(6) Any licensee who contravenes any of the provisions of para- graph (1) or (4) shall be guilty of an offence and be liable on summary conviction to a fine of five thousand dollars.
18. (1) No person shall use for fluoroscopy of any part of the human body any X-ray machine unless the total filtration of the useful beam from such machine corresponds to not less than two millimetres thickness of aluminium, or its equivalent where other materials are used, as determined at the maximum voltage.
(2) Any person who contravenes any of the provisions of para- graph (1) shall be guilty of an offence and be liable on summary conviction to a fine of five thousand dollars,
19. (1) The protective housing of all X-ray tubes shall be indelibly marked in such a way as to show readily the equivalent lead thickness of the protective housing for the maximum voltage for which the hous- ing is designed to be used.
(2) If the thickness of the protective material incorporated in the protective housing is not uniform over the entire surface thereof, the marking showing the equivalent thickness of lead may be replaced by a marking showing the farthest distance in any direction, measured from the target of the X-ray tube, at which all radiation, other than the useful beam, is reduced to an exposure rate of one hundred milliroentgens per hour if the enclosed X-ray tube is energized at its highest rated con- tinuous milliamperage and maximum voltage.
(3) Any licensee who operates, or causes to be operated, any X-ray tube which is not enclosed in a protective housing marked in accordance with the provisions of paragraph (1) or (2) shall be guilty of an offence and be liable on summary conviction to a fine of five thousand dollars.
20. Any person who manufactures, sells or possesses any television set which emits radiation at a rate exceeding 0.5 milliroentgen per hour measured at any readily accessible point on the surface of the apparates shall be guilty of an offence and be liable on summary conviction to a fine of five thousand dollars.
21 (1) No person shall use any irradiating apparatus for Determina- therapeutic purposes unless-
(a) the dose rate and the quality of the radiation emitted by the apparatus have been measured by a person approved by the Board for that purpose and using an ionometric or other method of measurement also approved by the Board;
(b) both the dose rate and the quality of the radiation from such apparatus are periodically so measured at such intervals as the Board may direct; and
(c) a record of all such measurements is kept by the licensee and is open to inspection by any person authorized by the Board for that purpose.
(2) No person shall use a radiation dosemeter or a radiation dose- rate meter for any determination made in accordance with paragraph (1), unless it is independent of, or corrected for, the quality of radiation within the range for which it is designed or used, and is provided with suitable arrangements for checking its ability to reproduce its readings.
(3) Any person who contravenes any of the provisions of para- graph (1) or (2) shall be guilty of an offence and be liable on summary conviction to a fine of five thousand dollars.
tion of dos rate and
quality of radiation.
use in
22. (1) No person shall use any time switch, exposure timer or Testing of treatment timer in connexion with any irradiating apparatus used for deers for therapeutic purposes unless such switch or timer is tested from time to connexion lime, as may be required by the Board, for accuracy by a person with irra- approved by the Board for such purpose and when last so tested was diating found to be accurate to within one per cent.
(2) Any person who contravenes any of the provisions of para- graph (1) shall be guilty of an offence and be liable on summary con- viction to a fine of five thousand dollars.
Apparatus.
of persons
undergoing treatment.
23. (1) Any person administering any treatment involving the Supervision exposure of any patient to radiation from any irradiating apparatus shall, during exposure to such radiation, himself keep the patient under observation and also the apparatus by means of which the treatment is being administered and shall determine the duration of the treatment either by an automatic treatment timer or by an integrating dosemeter.
(2) Any person who fails to comply with any of the provisions of paragraph (1) shall be guilty of an offence and be liable on summary conviction to a fine of five thousand dollars,
24. (1) In any therapeutic application of X-rays, the type of filter Recording used for the useful beam or the half-value layer resulting therefrom and checking shall at each treatment be entered in a treatment record of the patient of filters. by the person administering the treatment.
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