Xstrahl RADiant, Руководство оператора

Страница: 8 / 46

RADiant Operator Manual About Xstrahl
vi | 14/11/2018 PHET_OP_GB Version 7© Xstrahl Ltd. All Rights Reserved
Quality Assurance
The RADiant defines the exposure in time and does not measure the
output of the X-Ray tube for each exposure conducted. The output
of each clinical energy needs to be measured during the acceptance
of the unit and schedule in the daily quality assurance conducted on
the machine.
The IPEM report 81, kilo voltage X-Ray units recommends that the
following quality control checks are conducted on superficial
systems
Table 1-1: Recommended Quality Control Checks
a
Recommended Quality Control Checks
b
Test Frequency Tolerance
Daily
Output constancy check
± 5% If the daily output
constancy check
varies by more than
± 5% from the previous
monthly output
calibration, an
investigation should be
performed. This should
include at least a
measurement of HVL.
Interlocks and warnings
Mechanical fixtures
Filter interlock
Weekly
(or following
repair) Filter interlock
Monthly (or
following
repair Output measurement ± 3%
Timer accuracy ± 0.01 min.
Filter interlocks
HVL constancy ± 10%
Annually (or
following
repair Field uniformity ± 2%
Half value layer
Focal spot alignment ± 10%
a .Where no quantitative action level is indicated, the assessment is
subjective or based
on a yes/no decision.
b. Refer to IPEM (Institute of Physics and Engineering Medicine) report 81
for further details on recommended quality assurance checks
Intended Function (of
equipment)
Xstrahl’s range of superficial and orthovoltage X
-Ray Therapy
Systems are intended to assist in the delivery of radiation to a
defined target area whilst sparing surrounding normal tissue