Owandy Radiology i-max touch 3D, Руководство пользователя

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User Manual
– Technical characteristics
NIMXEN020I
Owandy Radiology SAS
40
6.7.2 Measured values
Different dose measurements are performed to find the location of the plane where the dose
measurement at 1 cm interior from the surface of the phantom is maximum.
Such location is perpendicular to the mid-sagittal line of the imaged volume on the left side of the
patient considering the patient orientation. The other Measurement Locations refer to 90° steps
clockwise.
Measurement Location Dose Value [mGy]
CDTI
100 (CENTER)
7.7
CDTI
100 (PERIPHERAL, MAX)
8.7
CDTI
100 (PERIPHERAL, 90°)
2.8
CDTI
100 (PERIPHERAL, 180°)
8.6
CDTI
100 (PERIPHERAL, 270°)
8.6
CDTI
100 (PERIPHERAL, AVERAGE°)
7.1
weighted CDTI
100
is CDTI
w
= 11.1 mGy
volume CDTI
w
is CDTI
wi
= CDTI
W
= 11.1 mGy
6.7.3 Measured Dose values for other conditions of operation
The following table lists the relative CTDI values for different conditions of operations, normalized
to the value of CTDI measured in the center of the Phantom at nominal conditions of operation
(84 kV, 5 mA, full dentition).
Conditions of Operation
CDTI Value Relative to
CDTI
100,CENTER
60 kV 0.72
74 kV 0.91
86 kV 1.01
6 mA 0.46
8 mA 1.23
10 mA 2.23
Mandibular volume 0.57
Maxillary volume 0.57
5 x 5 small volume 0.32
The following table lists the relative CDTI values for different kV values, normalized to the
maximum value of CTDI measured 1cm from the outer surface of the Phantom at nominal
conditions of operation (84 kV).
Conditions of Operation
CDTI Value Relative to
CDTI
100,PERIPHERAL,MAX
60 kV (minimum value) 0.93
86 kV (maximum value) 1.00
Maximum deviation from the nominal values given in the preceding tables is ± 25%.