Ill. Admin. Code tit. 32, pt. 360, tbl. B
X-ray Tube Voltage (kilovolt peak) | Minimum HVL (mm of Al)1 | ||
Designed operating range | Measured Operating Potential | Specified Dental Systems2 | Other X-Ray Systems3 |
Below 50 | 30 | 1.5 | 0.3 |
40 | 1.5 | 0.4 | |
49 | 1.5 | 0.5 | |
50 to 70 | 50 | 1.5 | 1.2 |
60 | 1.5 | 1.3 | |
70 | 1.5 | 1.5 | |
Above 71 | 71 | 2.1 | 2.1 |
80 | 2.3 | 2.3 | |
90 | 2.5 | 2.5 | |
100 | 2.7 | 2.7 | |
110 | 3.0 | 3.0 | |
120 | 3.2 | 3.2 | |
130 | 3.5 | 3.5 | |
140 | 3.8 | 3.8 | |
150 | 4.1 | 4.1 | |
1 Linear extrapolation or interpolation may be made for an x-ray tube potential (kVp) not listed in the table above (e.g., in the column entitled "Other X-ray Systems" operated at 20 kVp and 95 kVp, the minimum HVL required would be 0.2 and 2.6 millimeters of aluminum respectively).
2 "Specified Dental Systems" means any dental x-ray system designed for use with intraoral image receptors and manufactured after December 1, 1980.
3 "Other X-Ray Systems" means all x-ray systems required to meet the provisions of Sections 360.50, 360.60, 360.75, 360.90 (except "Specified Dental Systems") and 360.100 of this Part. Half-value layer requirements for mammography systems are specified in Section 360.71(e) of this Part.
Ill. Admin. Code tit. 32, pt. 360, tbl. B