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Operator´s Manual
1000-095-071-EN Rev. 1.1
OMNERA®
2020-09-14
Page 27
Profile of stray radiation for wall stand
The diagram below, Fig. 2-6
Scattered radiation rate expressed in percent of central beam
dose rate, with and without shielding
, shows the dependency of the scattered radiation on
the distance from the central beam, height above the floor and kV potential. The decrease of
the scattered radiation is expressed in percent of the central beam exposure rate (100%).
The diagram also shows the decrease of scattered radiation when using protective clothing,
also this expressed in percent of the central beam dose rate.
Scattered radiation rate expressed in percent of central beam dose rate, with and
shows that a higher kV increases the scattered radiation slightly. The dia-
gram also shows that the best way to minimize the effect of the scattered radiation is with an
increased distance to the patient and by using a lead apron.
Central beam exposure parameters:
KVP: 70, 100, 120 kV
Tube current: 100 mA
Exposure time: 100 ms
Field size: 40x40 cm
Film-Focus distance: 1,5 m
Patient simulation: 150 mm PMMA
Filter: 0 mm
Central beam dose rate measured on top of PMMA (1250 mm from focus)
0
500
1000
1500
2000
0,01
0,10
1,00
10,00
100,00
Height above floor(mm)
Percent of central beam dose rate (%)
Scattered radiation expressed in percent of central beam dose rate
70KV, 500 mm
100KV, 500mm
120KV, 500mm
70KV, 1000mm
70KV, 1000mm, Lead apron
100KV, 1000mm
100KV, 1000mm, Lead apron
120KV, 1000mm
120KV, 1000mm, Lead apron
central Beam dose rate
Fig. 2-6 Scattered radiation rate expressed in percent of central beam dose rate, with and without
shielding
Содержание Omnera 500A
Страница 1: ...Technical Publication Operator s Manual 1000 095 071 EN Rev 1 1 ...
Страница 3: ...Revision history Chapter Pages Rev Date New Release 1 1 2020 09 ...
Страница 4: ......
Страница 62: ...OMNERA 1000 095 071 EN Rev 1 1 Operator s Manual Page 54 2020 09 14 Safety Electromagnetic compatibility EMC ...
Страница 120: ...OMNERA 1000 095 071 EN Rev 1 1 Operator s Manual Page 112 2020 09 14 Fig 4 16 Operating the System Perform examination ...
Страница 152: ...OMNERA 1000 095 071 EN Rev 1 1 Operator s Manual Page 144 2020 09 14 Operating the System Portable detector table ...
Страница 158: ...OMNERA 1000 095 071 EN Rev 1 1 Operator s Manual Page 150 2020 09 14 Error Handling Diagnostic ...
Страница 162: ...OMNERA 1000 095 071 EN Rev 1 1 Operator s Manual Page 154 2020 09 14 Cleaning Wall stand Table OTC and X ray Tube ...
Страница 164: ...OMNERA 1000 095 071 EN Rev 1 1 Operator s Manual Page 156 2020 09 14 Function and safety checks Monthly Checks ...
Страница 172: ...OMNERA 1000 095 071 EN Rev 1 1 Operator s Manual Page 164 2020 09 14 Technical specification Wall stand ...
Страница 174: ...OMNERA 1000 095 071 EN Rev 1 1 Operator s Manual Page 166 2020 09 14 Waste Disposal ...
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