Okla. Admin. Code § 252:410-11-63

Current through Vol. 42, No. 7, December 16, 2024

Section 252:410-11-63 - Selection of stationary beam therapy or moving beam therapy

Systems of 1 MeV or more that are capable of both stationary beam therapy and moving beam therapy must:

(1) prevent the initiation of irradiation until the operator selects either stationary beam therapy or moving beam therapy at the control panel. The mode of operation must be displayed at the control panel;

(2) have an interlock system which:

(A) ensures that the therapeutic systems can operate only in the mode which has been selected;

(B) prevents irradiation if any selected operations carried out in the treatment room do not agree with the operations selected at the control panel; and

(C) for post-1989 systems, terminates irradiation if movement of the gantry occurs during stationary beam therapy or stops during moving beam therapy unless the stoppage is a preplanned function;

(3) be able to control moving beam therapy to obtain the selected relationships between incremental dose monitor units and incremental angle of movement. Post-1989 systems must have an interlock system that:

(A) terminates irradiation if the number of dose monitor units delivered in any 10 degrees of arc differs by more than 20 percent from the selected value;

(B) when gantry angle terminates the irradiation in arc therapy, the dose monitor units must differ by less than 5 percent from the value calculated from the absorbed dose per unit angle relationship; and

(C) when the dose monitor system is capable of terminating irradiation in arc therapy, the requirements of 252:410-11-58 shall also apply.

Okla. Admin. Code § 252:410-11-63

Added at 17 Ok Reg 1136, eff 6-1-00