Ohio Admin. Code 3701:1-58-66 - Periodic spot-checks for gamma stereotactic radiosurgery units
(A) A licensee
authorized to use a gamma stereotactic radiosurgery unit for medical use shall
perform spot-checks of each gamma stereotactic radiosurgery facility and on
each unit:
(1) Monthly;
(2) Before the first use of the unit on a
given day; and
(3) After each
source installation.
(B) A licensee shall:
(1) Perform the measurements required by
paragraph (A) of this rule in accordance with written procedures established by
the authorized medical physicist. That individual need not actually perform the
spot-check measurements.
(2) Have
the authorized medical physicist review the results of each spot-check within
fifteen days. The authorized medical physicist shall notify the licensee as
soon as possible in writing of the results of each spot-check.
(C) To satisfy the requirements of
paragraph (A)(1) of this rule, spot-checks must, at a minimum:
(1) Assure proper operation of:
(a) Treatment table retraction mechanism,
using backup battery power or hydraulic backups with the unit off;
(b) Helmet microswitches;
(c) Emergency timing circuits; and
(d) Stereotactic frames and localizing
devices (trunnions).
(2) Determine:
(a) The output for one typical set of
operating conditions measured with the dosimetry system described in paragraph
(B) of rule
3701:1-58-60;
(b) The difference between the
measurement made in paragraph (C)(2)(a) of this rule and the anticipated
output, expressed as a percentage of the anticipated output (i.e., the value
obtained at last full calibration corrected mathematically for radioactive
decay);
(c) Source output against
computer calculation;
(d) Timer
accuracy and linearity over the range of use;
(e) On-off error; and
(f) Trunnion centricity.
(D) To satisfy the
requirements of paragraphs (A)(2) and (A)(3) of this rule, spot-checks must
assure proper operation of:
(1) Electrical
interlocks at each gamma stereotactic radiosurgery room entrance;
(2) Source exposure indicator lights on the
gamma stereotactic radiosurgery unit, on the control console, and in the
facility;
(3) Viewing and intercom
systems;
(4) Timer termination;
(5) Radiation monitors used to
indicate room exposures; and
(6)
Emergency off buttons.
(E) A licensee shall arrange for the repair
of any system identified in paragraph (C) of this rule that is not operating
properly as soon as possible.
(F)
If the results of the checks required in paragraph (D) of this rule indicate
the malfunction of any system, a licensee shall lock the control console in the
off position and not use the unit except as may be necessary to repair,
replace, or check the malfunctioning system.
(G) A licensee shall retain a record of each
check required by paragraphs (C) and (D) of this rule and a copy of the
procedures required by paragraph (B) of this rule in accordance with rule
3701:1-58-97
of the Administrative Code.
Notes
Promulgated Under: 119.03
Statutory Authority: 3748.02, 3748.04
Rule Amplifies: 3748.04
Prior Effective Dates: 08/15/2005
Promulgated Under: 119.03
Statutory Authority: 3743.02, 3748.04
Rule Amplifies: 3748.04
Prior Effective Dates: 8/15/2005
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