Current through Register Vol. 61, No. 4, April 1, 2022
Timers. Means shall be provided to
terminate the exposure at a preset time interval, preset product of current and
time, a preset number of pulses or a preset radiation exposure to the image
receptor. In addition:
(a) Termination of
exposure shall cause automatic resetting of the timer to its initial setting or
(b) 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.
X-ray Exposure Control:
An X-ray exposure control shall be
incorporated into each X-ray system such that an exposure can be terminated by
the operator at any time except for:
Exposure of 0.5 second or less; or
(B) During serial radiography when means
shall be provided to permit completion of any single exposure of the series in
exposure control shall be located in such a way as to meet the following
(A) Stationary X-ray systems
shall be required to have the X-ray exposure control permanently mounted in a
protected area so that the operator is required to remain in that protected
area during the entire exposure; and
(B) The operator's protected area shall
provide visual indication of the patient during the X-ray procedure;
Mobile and portable X-ray
systems which are:
(i) Used for greater than
one week in the same location, i.e., a room or suite, shall meet the
requirements of paragraph (2)(b)(A) of this rule;
(ii) Used for greater than one hour and less
than one week at the same location, i.e., a room or suite, shall meet the
requirement of subparagraph (2)(b)(C)(i) of this rule or be provided with a 6.5
feet (1.98 m) high protective barrier which is placed at least 6 feet (1.83 m)
from the tube housing assembly and at least 6 feet (1.83 m) from the patient;
(iii) Used to make an
exposure(s) of a patient at the use location shall meet the requirement of
subparagraph (2)(b)(C)(i) or (ii) of this rule or be provided with a method of
X-ray control which permits the operator to be at least 12 feet (3.66 m) from
the tube housing assembly during an exposure.
(c) The X-ray control shall provide visual
indication observable at or from the operator's protected position whenever
X-rays are produced. In addition, a signal audible to the operator shall
indicate that the exposure has terminated.
Automatic Exposure Controls. When an
automatic exposure control is provided:
Indication shall be made on the control panel when this mode of operation is
(b) If the X-ray tube
potential is equal to or greater than 50 kVp, the minimum exposure time for
field emission equipment rated for pulsed operation shall be equal to or less
than a time interval equivalent to two pulses;
(c) The minimum exposure time for all
equipment other than that specified in subsection (3)(b) of this rule shall be
equal to or less than 1/60 second or a time interval required to deliver 5 mAs,
whichever is greater;
the product of peak X-ray tube potential, current, and exposure time shall be
limited to not more than 60 kWs per exposure, or the product of X-ray tube
current and exposure time shall be limited to not more than 600 mAs per
exposure except that, when the X-ray tube potential is less than 50 kVp, the
product of X-ray tube current and exposure time shall be limited to not more
than 2000 mAs per exposure; and
A visible signal shall indicate when an exposure has been terminated at the
limits required by subsection (3)(d) of this rule, and manual resetting shall
be required before further automatically timed exposures can be made.
(4) Reproducibility. With a timer
setting of 0.5 seconds or less, the average exposure period (T) shall be
greater than or equal to five times the maximum exposure period (Tmax) minus
the minimum exposure period (Tmin) when four timer tests are performed: (T) 5
(Tmax - Tmin).
Or. Admin. R.
HD 4-1985, f. & ef.
3-20-85; HD 1-1991, f. & cert. ef. 1-8-91; PH 12-2006, f. & cert. ef.
6-16-06; PH 14-2008, f. & cert. ef. 9-15-08; PH 4-2013, f. & cert. ef.
Stat. Auth.: ORS 453.605 - 453.807
Stats. Implemented: ORS 453.605 -