GE Brivo OEC 715, Service Manual

Page: 290 / 551

Software
5-7
Wrong input voltage settings will lead to system work in abnormal mode.
The following section describes the instruction how to set Dose Group and X-ray Control
according to the following Table “Exposure Management Matrix”. If the instruction
contradicts the corresponding regulatory requirements of certain countries or regions (for
example, some regulatory requirements are updated), change the setting according to
the regulatory requirements.
Select “Dose Group Option” by country to set the dose limitation in normal (standard) and HLF exposure.
The available options are:
‒ Normal 88 and HLF 100
‒ Normal 50 and HLF 50
‒ Normal 50 and HLF 100
The skin dose rate in the Dose Group represents the value for conditions of free-in-air irradiation at the
patient skin: 30cm along the beam axis from the image intensifier surface.
1. Two dose groups in normal (standard) Fluoro mode:
‒ Normal50: The skin dose rate does not exceed 50mGy/min in standard Fluoro mode, such as
Australia, Japan, New Zealand, etc.
‒ Normal88: The skin dose rate does not exceed 88mGy/min in standard Fluoro mode, such as
USA, Germany, etc.
2. Two dose groups in HLF mode:
‒ HLF50: The skin dose rate does not exceed 50 mGy/min in HLF mode, such as Japan, etc.
‒ HLF100: The skin dose rate does not exceed 100 mGy/min in HLF mode, such as Australia,
Italy, UK, New Zealand, etc.
For the country, such as USA, if the skin dose rate shall not exceed 176 mGy/min in HLF mode from its
regulatory requirements, the system will use HLF100 in HLF mode because the maximum skin dose rate
of the X-ray tube cannot exceed 100 mGy/min.
3. For some countries, their dose limitation should be the combination of the above normal and HLF
groups. For example:
‒ Australia: Normal50 and HLF100
‒ China: Normal88 and HLF100
4. For countries or regions that have a higher standard Fluoro dose (at the patient skin) rate limit
than USA, the dose limits are set to the same value as for USA.
5. For countries or regions that have a higher HLF dose (at the patient skin) rate limit than USA, the
dose limits are set to the same value as for USA.
6. For countries or regions that do not specify standard Fluoro dose at patient skin, the dose limits
are set to the same value as for USA.
7. For countries or regions that do not specify HLF dose at patient skin, the dose limits are set to the
same value as for USA.
Refer to the below table “Exposure Management Matrix” to set Dose Group.