DHS 157.67(13)(13) Additional technical requirements for mobile remote afterloader units. DHS 157.67(13)(a)(a) A licensee providing mobile remote afterloader service shall do all of the following: DHS 157.67(13)(a)1.1. Check survey instruments before medical use at each client’s address of use or on each day of use, whichever is more frequent. DHS 157.67(13)(b)(b) In addition to the periodic spot-checks required by sub. (11), a licensee authorized to use mobile afterloaders for medical use shall perform checks on each remote afterloader unit before use at each address. A check shall be made to verify the operation of all the following: DHS 157.67(13)(b)2.2. Source exposure indicator lights on the remote afterloader unit, on the control console and in the facility. DHS 157.67(13)(b)4.4. Applicators, source transfer tubes and transfer tube-applicator interfaces. DHS 157.67(13)(b)7.7. Radiation monitors used to indicate whether the source has returned to a safe shielded position. DHS 157.67(13)(c)(c) A licensee shall ensure overall proper operation of the remote afterloader unit by conducting a simulated cycle of treatment before use at each address of use. DHS 157.67(13)(d)(d) If the results of the checks required in par. (b) 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. DHS 157.67(14)(a)(a) In addition to the survey requirement in s. DHS 157.25 (1), a person licensed to possess or use photon emitting remote afterloader, teletherapy or gamma stereotactic radiosurgery units shall perform surveys of the device and ensure the results of the surveys from the surface of the main source safe, with the sources in the shielded position, do not exceed the maximum and average radiation levels listed in the sealed source and device registry. DHS 157.67(14)(b)(b) A licensee shall make the survey required by par. (a) at installation of a new source and following repairs to source shielding, a source driving unit or other electronic or mechanical component that could expose a source, reduce the shielding around a source or compromise the radiation safety of the unit or a source. DHS 157.67(15)(15) Full inspection for teletherapy and gamma stereotactic radiotherapy units. DHS 157.67(15)(a)(a) A licensee shall have each teletherapy unit and gamma stereotactic radiosurgery unit inspected for proper operation and serviced during source replacement to assure proper functioning of the source exposure mechanism. The intervals between full inspection and servicing shall not to exceed 5 years for each teletherapy unit and shall not exceed 7 years for each gamma stereotactic radiosurgery unit. DHS 157.67(15)(b)(b) Inspection and servicing of a teletherapy or gamma stereotactic radiosurgery unit may only be performed by a person specifically licensed to do so by the department, the NRC or another agreement state. DHS 157.67(16)(16) Therapy-related computer systems. A licensee shall perform acceptance testing on the treatment planning system under published protocols accepted by nationally recognized bodies. The acceptance testing shall include, as applicable, verification of all of the following: DHS 157.67(16)(a)(a) Source-specific input parameters required by the dose calculation algorithm used to calculate the dose to the patient. DHS 157.67(16)(b)(b) Accuracy of dose, dwell time of the radioactive source at a particular location and treatment time calculations at representative points. DHS 157.67(16)(c)(c) Accuracy of isodose graphic plots on paper and graphic displays. DHS 157.67(16)(d)(d) Accuracy of the software used to determine radioactive source positions from radiographic images.