Cal. Code Regs. tit. 17, § 30311.1 – Quality Assurance for Dental Radiography.

(a) Each user subject to this article, as specified in section 30305(a)(1), using intra-oral film for dental radiography of human beings shall assure all of the following:
1. (1) A reference film meeting the interpreting dentists' criteria for image density, contrast, sharpness and overall quality is selected for use in daily comparisons of dental radiographs.
2. (2) For each day dental radiographs are processed, clinical radiographs are compared to the selected reference film for density, contrast, sharpness, and overall image quality.
3. (3) Corrective action is taken when observable changes occur in clinical radiographic image density, contrast, sharpness and overall quality.
4. (4) Records of the corrective actions taken, and the effectiveness of those corrective actions, are maintained for a minimum of one year from the date the corrective action was taken.
5. (5) Corrective action, as directed by the Department, is taken if the entrance exposure to an adult patient for a routine intraoral bitewing exam is found by the Department to be outside the ranges specified in the following table.
  Tube Potential¹ (kVp)²
  “D” Speed Film (mR)³
  “E or F” Speed Film (mR)³
  50
  425-575
  220-320
  55
  350-500
  190-270
  60
  310-440
  165-230
  65
  270-400
  140-200
  70
  240-350
  120-170
  75
  170-260
  100-140
  80
  150-230
  90-120
  85
  130-200
  80-105
  90
  120-180
  70- 90
  95
  110-160
  60- 80
  100
  100-140
  50- 70
  1 Linear extrapolation or interpolation shall be used for an x-ray tube potential (kVp) not listed in the table.
  2 The kVp shall be measured to determine the correct exposure limit to be applied.
  3 Exposures values are specified as free-in-air exposures without backscatter.

Note: Authority cited: Sections 114975, 115000, 115060, 115061, 131051, 131052, 131055 and 131200, Health and Safety Code. Reference: Sections 114965, 114970, 115000, 115060 and 115061, Health and Safety Code.

History

1. New section filed 9-4-2012; operative 10-4-2012 (Register 2012, No. 36).