Stray Radiation Measurements - Planmeca ProMax 3D Max with ProTouch Technical Manual

1 General and technical data
ProMax
model
3D Max

1.9 Stray radiation measurements

26 Planmeca ProMax 3D Max
DAP = the value on the X-ray unit's user interface
k = DAP to Air Kerma coefficent, listed in the table below.
Volume/ Volume size
target
Adult
Diameter
Tooth, Ear 50
Teeth 100
Teeth, 100
Sinus,
Nose,
Temporal,
Vertebrae,
Airways
Jaw 130
Jaw 130
Sinus 130
Face, 100
Sinus,
Vertebrae,
Airways
Face, 130
Airways
Face, 130
Airways
Skull 230
Skull 230
The measurements are given for loading factors which result in the
maximum local dose per current time product. The loading factors include
the highest selectable X-ray tube voltage (i.e. 96 kV and 120 kV).
PMMA phantom with a diameter of 160 mm and a length of 160 mm has
been used for the measurements. The phantom is compatible with the
specification in international standard IEC 60601-2-44. The phantom was
positioned in the center of rotation of the 3D X-ray unit.
The values were measured in the horizontal plane which was at the height of
the center of rotation of the 3D X-ray unit. The unit of measurement was air
kerma per mAs applied to the X-ray tube during normal use. Values are
presented in nGy/mAs.
The actual stray radiation values are calculated with formula:
Stray Radiation = factor x mAs
Where mAs is the milliampere second value in the program in question.
Child
Height Diameter
55 42
55 85
90 85
55 110
90 110
100 130
130 85
130 110
160 110
160 230
260 230
DAP to Air Kerma
Coefficient (k)
Adult
Height
50 93.3
50 186.7
75 305.4
50 151.7
75 248.2
100 275.7
110 441.2
110 358.5
136 441.2
160 441.2
260 441.2
Technical manual
Child
71.3
144.2
216.4
116.7
175
275.7
317.3
256.7
317.3
441.2
441.2