AAPM Accredited NIST-Traceable Beam Qualities

Therapy Ion Chamber Diagnostic X-Ray Ion Chamber
60Co (in water per TG-51 or air kerma per TG-21) Choose from the Tungsten (radiographic) anode beams or the Molybdenum (mammographic) anode beams listed below
137Cs
X-Ray (choose from the Tungsten anode beams listed below)
Tungsten Anode X-Ray Beam Qualities
Beam Code Added Filter (mm Al or Cu)

  HVL 1 (mm Al)

  HVL 1 (mm Cu) HC (Al) Air Kerma Rate (mGy/sec)
UW30-L 0.24 Al 0.24   61 2.295
UW40-L 0.46 Al 0.51   59 2.114
UW50-L 0.63 Al 0.80   61 2.882
UW80-L 1.20 Al 1.82   60 3.601
UW100-L 1.80 Al 2.81   59 3.930
UW20-M 0.19 Al 0.15   79 0.869
UW30-M 0.41 Al 0.36   66 1.308
UW40-M 0.77 Al 0.75   68 1.291
UW50-M 0.92 Al 1.03   66 2.105
UW60-M 1.66 Al 1.68   68 1.758
UW80-M 3.09 Al 3.07   68 1.737
UW100-M 5.21 Al 5.10   73 1.746
UW120-M 2.21 Al + 0.13 Cu 6.78   76 2.417
UW150-M 2.49 Al + 0.31 Cu 10.30
0.66 86 2.037
UW200-M 0.89 Al + 1.06 Cu 14.73
1.62 94 1.892
UW250-M 4.29 Al + 2.86 Cu 18.49
3.13 98 1.431
Molybdenum AnodeX-Ray Beam Qualities
UW Beam Code
1st HVL (mm Al) Added Filter (mm)  Air Kerma Rate (mGy/sec)
    Mo Rh  
UW23-MO 0.280 0.032    0.568
UW25-MO 0.305 0.032    0.733
UW28-MO 0.336 0.032    0.992
UW30-MO 0.359 0.032    1.243
UW35-MO 0.390 0.032    1.795
UW28-MR 0.424   0.03  0.673
UW32-MR 0.453   0.03  1.023