Siemens MOBILETT Plus HP Maintenance Instruction

Siemens AG SPR8-220.101.04.03.02 MOBILETT Plus HP
07.05 CS PS 24
Inspection and Maintenance 47
Page 47 of 64
Medical Solutions
2.9 Check for reproducibility
Requirement:
NOTE
The following test requires 10 sequential exposures, which must
be taken within one hour.
After each measurement, the exposure parameters should be set
to different values for a short time.
If the MOBILETT is equipped with a DAP measuring system, re-
move the DAP ionization chamber first.
Required measurement devices:
- Dose meter
Procedure:
• Wait until the system has reached thermal stability. A 15 minute warm-up time is re-
quired for the generator to be ready.
• Release the specified number of exposures with the following exposure data:
X - 85 kV, 1.0 mAs, 10 exposures.
• Measure the dose for each exposure with the dose meter.
• Reset the measurement display prior to each new measurement.
Calculations: Fluctuation coefficient C
• The fluctuation coefficient C for a dose measurement sequence of 10 exposures is:
Fig. 23:
Where:
The fluctuation coefficient C must be ≤ 0.045.
Setting
• The coefficient of fluctuation of the radiation dose may not be larger than 0.045 for any
combination of exposure parameters if the X-ray system is supplied with line voltage
as specified by Siemens.
s = standard deviation produced from the measurements
= average measurement value of the sequence
x
i
= i-th measurement value of the sequence
n = number of measurements in the measurement sequence

Siemens MOBILETT Plus HP Specifications

General

Brand	Siemens
Model	MOBILETT Plus HP
Category	Medical Equipment
Language	English