Current through Register Vol. 48, No. 12, March 22, 2024
In addition to the provisions of Sections
360.10,
360.30
and
360.40
(except Section
360.40(a)
) of this Part, the requirements of this Section apply to x-ray equipment and
associated facilities used for radiography with veterinary systems.
a) Beam Limitation. The useful beam shall be
limited to the area of clinical interest. The size of the image receptor used
for each radiographic projection shall be consistent with the objectives of the
examination.
1) Limitation Criteria. Means
shall be provided to limit the x-ray field in the plane of the image receptor
so that the field does not exceed each dimension of the image receptor by more
than two percent of the SID when the axis of the x-ray beam is perpendicular to
the plane of the image receptor.
2)
Means shall be provided to align the center of the x-ray field with the center
of the image receptor to within two percent of the SID.
3) The requirements of subsection (a)(1) of
this Section may be met with:
A) An adjustable
collimator with a field defining light; or
B) An assortment of removable,
fixed-aperture, beam-limiting devices sufficient to meet the requirement for
each combination of image receptor size and SID for which the unit is used,
with each such device having permanent, clearly legible markings in centimeters
and/or inches, to indicate the image receptor size and SID for which it is
designed; or
C) A beam-limiting
device having multiple fixed apertures sufficient to meet the requirement for
each combination of image receptor size and SID for which the unit is used.
Permanent, clearly legible markings, in centimeters and/or inches, shall
indicate the image receptor size and SID for which each aperture is designed
and shall indicate which aperture is in position for use.
4) SID Indication
A) Means shall be provided to indicate the
SID.
B) SIDs shall be indicated in
centimeters and/or inches and the measured SID shall correspond to the
indicated value to within two percent.
b) Exposure Switch Arrangement. The exposure
control switch shall be arranged so the operator can be at least 1.83 meters (6
feet) from the animal, the x-ray tube and the useful beam.
c) Radiation Exposure Control Devices
1) Means shall be provided to terminate the
exposure at a preset time interval, preset product of current and time, preset
number of pulses or preset radiation exposure to the image receptor. Also, it
shall not be possible to make an exposure when the timer is set to a zero or
off position if either position is provided.
2) The exposure switch shall be a dead-man
switch.
d) Veterinary
fluoroscopic, computed tomography and therapy systems shall meet the
requirements specified in Sections
360.50,
360.75,
360.110
and
360.120
of this Part, except that the requirements pertaining to aural communication
specified in Sections
360.75(b)(2),
360.110(a)(8)
and (e)(5) and
360.120(a)(6)
and (g)(1)(H) of this Part, need not be
satisfied unless a human is used to hold the animal.
e) Additional Requirements for Veterinary
X-Ray Systems
1) All individuals whose
presence is required during an x-ray examination shall be protected from
scatter radiation by protective aprons or gowns of not less than 0.25
millimeter lead equivalent or whole body protective barriers.
2) All exams and retakes shall be ordered by
the veterinarian.
3) Unless
required to restrain an animal, the operator shall stand at least 1.83 meters
(6 feet) away from the useful beam and the animal during radiographic
exposures.
4) No individual, other
than the operator, shall be in the x-ray room or area while exposures are being
made unless such individual's assistance is required.
5) When an animal must be held in position
during radiography, mechanical supporting or restraining devices shall be used
when technique permits.
6) When a
person is required to hold an animal during a radiographic procedure, the
individual shall be protected with appropriate shielding devices, such as
protective gloves and apron, and the person shall be so positioned that no part
of his/her body except hands and arms will be struck by the useful
beam.
AGENCY NOTE: Veterinarians should review 32 Ill. Adm. Code
340.520
to determine if individuals who hold animals will need to use individual
monitoring devices.
