Wisconsin Administrative Code › Department of Health Services › DHS 110-199 - Health › Chapter DHS 157 - Radiation Protection › Subchapter VIII - X-ray Device Requirements › Section DHS 157.81 - Shielding plan review

Current through June 24, 2024
(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.
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.
(2) EXEMPTIONS.
				  Dental intraoral and panoramic, mammography, and bone density devices are
				  exempt from this section.
(3) PLAN
				  SUBMITTAL REQUIREMENTS.
(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.
(b) A shielding plan
				  submitted for department review shall include all of the following:
1. The maximum rated technique factors of
				  each machine.
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:
a. The
				  type and thickness of materials, or lead equivalency, of each protective
				  barrier.
b. The use and occupancy
				  of the areas surrounding an x-ray room, including occupied areas above or below
				  an x-ray room.
c. The construction
				  materials used for the floor and ceiling, if
				  appropriate.
(c) The operator booth described in the
				  shielding plan shall be designed to meet all the following requirements:
1. The view area of the window shall be at
				  least 0.09 m 2 (144 square inches).
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.
3. The
				  shielding value of the window shall be equal to the wall in which it is
				  mounted.
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.
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.
6. Verbal communication
				  with the patient shall be possible at all times during the x-ray
				  procedure.
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.