Calculate Dosage - Dentsply Sirona Orthophos E Ceph Operating Instructions Manual

8 Program values
8.3 Dose information
108
8.3.3

Calculate dosage

For any freely programmed parameter combinations, you must
calculate the value using the kV/DAP lists; see sample calculation:
Explanation
The Radiation Protection Ordinance requires that the system must
include either devices that show the
DAP display for the radiation exposure of the patient, or that this
information can be derived e.g. from tables.
The manufacturers of dental equipment have agreed on using the same
measurement method. To compensate for measuring errors as well as
for system and instrument variations, a tolerance of 20 % must be taken
into account.
The radiation exposure is specified as the dose area product (DAP) of
the absorbed dose (Gy x cm
selectable kV level and diaphragm.
Calculation:
The values indicated below have been calculated for the parameter
combinations proposed by Dentsply Sirona. If other settings are used,
with the help of kV/DAP lists, proceed as follows:
1. Select the set kV level from the table of the respective X-ray system
and note down the DAP factor.
2. Multiply the DAP factor by the actually used mA (as indicated on the
X-ray system).
3. Multiply the result by the actual exposure time (see Multitimer or
table).
Sample calculation
X-ray with program P1 and a parameter combination of 60 kV/8 mA
Ad 1. 60 kV has a DAP factor of 0.52 in diaphragm 10
Ad 2. 8 mA displayed
Ad 3. the exposure time is 14.1 s
Operating Instructions Orthophos E
2
) per mAs for each unit as well as each
D3352.201.12.01.02 03.2019
Dentsply Sirona
67 11 001 D3352