DHS 157.81(1) (1) Plan review and approval. Prior to construction, the floor plans, shielding specifications and equipment arrangement of all new installations, or modifications of existing installations, utilizing ionizing radiation machines, including dental CT and dental cephalometric machines, shall be submitted to the department for review and approval.

DHS 157.81 Note Note: Plans may be mailed to the department at: Department of Health Services, Radiation Protection Section, P.O. Box 2659, Madison WI 53701-2659 or package delivery to: Department of Health Services, Radiation Protection Section, Room 150, 1 West Wilson St, Madison WI 53702-0007.

DHS 157.81(2) (2) Exemptions. Dental intraoral and panoramic, mammography, and bone density devices are exempt from this section.

DHS 157.81(3) (3) Plan submittal requirements.

DHS 157.81(3)(a) (a) A shielding plan for a facility with two or more x-ray rooms shall include a medical physicist or person approved by a medical physicist recommendation for shielding.

DHS 157.81(3)(b) (b) A shielding plan submitted for department review shall include all of the following:

DHS 157.81(3)(b)1. 1. The maximum rated technique factors of each machine.

DHS 157.81(3)(b)2. 2. A scale drawing of the room in which a stationary radiation machine system is located with such drawing indicating the use of areas adjacent to the room and an estimation of the extent of occupancy by a person in such areas. In addition, the drawing shall include all of the following:

DHS 157.81(3)(b)2.a. a. The type and thickness of materials, or lead equivalency, of each protective barrier.

DHS 157.81(3)(b)2.b. b. The use and occupancy of the areas surrounding an x-ray room, including occupied areas above or below an x-ray room.

DHS 157.81(3)(b)2.c. c. The construction materials used for the floor and ceiling, if appropriate.

DHS 157.81(3)(c) (c) The operator booth described in the shielding plan shall be designed to meet all the following requirements:

DHS 157.81(3)(c)1. 1. The view area of the window shall be at least 0.09 m2 (144 square inches).

DHS 157.81(3)(c)2. 2. The window shall be placed so that the edge of the view window is at least 0.45 meters (18 inches) from the end of the barrier. The window shall be placed so that the patient may be observed at all times and each entrance to the room is observed from the operator position. Patient and entrance observation may be accomplished by the use of electronic devices or mirrors.

DHS 157.81(3)(c)3. 3. The shielding value of the window shall be equal to the wall in which it is mounted.

DHS 157.81(3)(c)4. 4. Booth walls shall be 2.1 meters (7 feet) in height and permanently attached to the floor or walls. The booth shall be at least 1.3 meters (4 feet) from the nearest vertical cassette holder or 0.3 meters (one foot) from the nearest corner of the examining table.

DHS 157.81(3)(c)5. 5. When a door or moveable panel is used as an integral part of the booth structure, it shall have a permissive device that prevents an exposure when the door or panel is not closed.

DHS 157.81(3)(c)6. 6. Verbal communication with the patient shall be possible at all times during the x-ray procedure.

DHS 157.81(3)(c)7. 7. The x-ray exposure control shall be located within the shielded area and at least 1 meter (3.3 feet) from the open end of the protective barrier, excluding mammography units.

DHS 157.81(4) (4) Operational analysis. The department may require additional modifications to a shielding plan after initial approval of the plan if a subsequent analysis of operating conditions indicates the possibility of a person receiving a dose in excess of the limits prescribed in ss. DHS 157.22 (1) and (5) to (8) and 157.23 (1) and (2). An existing x-ray room constructed using 5 mSv (500 mrem) as the public exposure limit may continue to operate without modification until the x-ray equipment is replaced or the room is modified.

DHS 157.81 History History: CR 01-108: cr. Register July 2002 No. 559, eff. 8-1-02; CR 06-021: am. (3) (a) Register October 2006 No. 610, eff. 11-1-06; CR 09-062: am. (1) and (2), cr. (3) (c) 7. Register April 2010 No. 652, eff. 5-1-10; CR 22-015: am. (4) Register June 2023 No. 810, eff. 7-1-23.

DHS 157.82 DHS 157.82 General administrative requirements for facilities using therapeutic radiation machines for human use.

DHS 157.82(1) (1) Administrative controls. A registrant shall be responsible for directing the operation of the therapeutic radiation machines that have been registered with the department. All persons operating a therapeutic radiation machine shall be instructed in and shall comply with the provisions of the radiation safety requirements of ss. DHS 157.22 (1) and (5) to (8) and 157.25 (2). A therapeutic radiation machine that does not meet the provisions of this subchapter but is of a type accepted by the US food and drug administration may not be used for irradiation of human patients.

DHS 157.82(2) (2) Training for radiation therapy users.

DHS 157.82(2)(a) (a) A registrant for any therapeutic radiation machine, except dermatology units under 150 kV, shall require the authorized user to be a physician who meets any of the following requirements:

DHS 157.82(2)(a)1. 1. Certified or board eligible in one or more of the following:

DHS 157.82(2)(a)1.a. a. Radiology or therapeutic radiology by the American board of radiology.

DHS 157.82(2)(a)1.b. b. Radiation oncology by the American osteopathic board of radiology.

DHS 157.82(2)(a)1.c. c. Radiology, with specialization in radiotherapy, as a British “Fellow of the Faculty of Radiology” or “Fellow of the Royal College of Radiology”.