QA Tools
LINACHECK
LINACHECK is an automatic measuring device
that simultaneously measures dose, dose rate and irradiation time of your
linear accelerator. Designed in full compliance with various national
and international regulations. LINACHECK will accurately measure and record
the photon and electron MU of your accelerator in Gy, Gy/min, and irradiation
time in seconds.
QC6PLUS
Quick Check QC6Plus is a highly reliable, fast
and very easy to use QC measurement device Designed to work in connection
with our multichannel dosemeter MULTIDOS, or the QC6Plus display unit,
the QC6Plus is ideally suited for the demanding measurements required
by linear accelerators. Flatness, symmetry, energy stability and central
beam dose are evaluated simultaneously.
EPID QC Phantom
Electronic Portal Imaging Devices (EPID) are used in radiation therapy
to verify the patient's position in the radiation beam during treatment.
EPIDs are intended to detect physiological structures of the patient
and to refer to them to the photon beam's coordinate system. Regular
quality checks of the EPIDs are therefore crucial to ensure constant
image quality and thus a high safety level for the patient.
The EPID QC software package automatically detects the
location of the test elements, performs all evaluations without further
interference of the user, and displays the results by comparison with
the baseline values.
The EPID QC Phantom includes a wide range of high-contrast
test patterns to perform tests even of the most advanced EPIDs available.
The analysis includes a separation of quantum noise caused by the detected
photons, and noise generated in the EPID. The low-contrast device enables
service personnel to adjust EPID brightness and contrast using well-established
procedures, and without the need of additional test devices. The wide-range
copper step wedges provide data to create absorption correction tables
for dosimetry purposes.
IsoCheck
IsoCheck is a test object according to the German Standard DIN 6847-4
and other international regulations. It is used to check the isocenter
geometry of linear accelerators. IsoCheck's etched alignment lines and
cross-hairs make positioning of the test object by using the laser alignment
beams very easy. Iso Check can then be loaded with an X-ray film which
is locked in a fixed position while being irradiated by pencil beams
under various angles of incidence. Yhe developed film clearly shows
the difference between the mechanical and the radiation isocenter.
Features:
- Test object according to the German Standard DIN 6847-4 and appropriate
international regulations
- Check of the consistent performance of linacs with respect to the
isocenter geometry
- Easy positioning
"Essen" QA Cube Type 2965
The "Essen" cube Type 2965 is a useful tool for linear accelerators
quality assurance. Constancy checks and isocenter geometry checks to
compare radiation field and light field can be performed in a fast and
easy way. The cube has double walls to hold films up 18x 24 cm in size
and can position the film in 5 different directions. On all four sides
of the cube it is possible to mark the center lines of the film by a
needle.
Features:
- Tool for quality assurance at linear accelerators for constancy
and isocenter geometry checks to compare radiation field and light field
MoniCheck MoniCheck is a quality assurance device for radiation therapy. Designed
according to the German Standard DIN 6847, part 5, to perform constancy
checks of the monitor calibration of the accelerators electron beams.
The device consists of an acrylic phantom with a chamber hole for a
PTW Type 23364 or Type 31003, 0.3 cc ionization chamber. MoniCheck slides
into the accelerators accessory holder, an ion chamber inserted, and
an electron measurements. Adapters for other types of chambers are available
on request.
Features:
- Quality assurance device for radiation therapy according to DIN
6847, part 5
- Constancy checks of the monitor calibration at medical electron
beam accelerators
WedgeCheck WedgeCheck is used to determine wedge angles of high energy photon
beams and is suitable for either mechanical or virtual/dynamic wedge.
The procedure is expedited if a dual channel electrometer and two ionization
chambers are used. The wedge angle determined by WedgeCheck agrees to
within +/- 1 degree with results obtained in accordance with IEC 976,
1989.
Features:
- Determination of mechanical and virtual/dynamic wedge angles in
high energy photon beams
- Installation at the accessory tray of the accelerator for easy positioning
of the inserted ion chambers at any gantry angle
- System includes solid state phantom and software
QA Film Holder
- Application:Constancy check of LINAC beam by irradiating a radiographic film
- Design:Acrylic plate for fixation at the collimator of a LINAC, LINAC type
has to be specified
Use:
A radiographic film, size 13cm x 18 cm or 18cm x 24cm is placed on
the QA film holding device, the device is fixed to the LINAC collimator
and a certain field size is irradiated to the film. After development,
the film can be evaluated by a film densitometry system.
PosiCheck
With PosiCheck the source position within afterloading applicators
can be checked. An applicator can be inserted into one of 7 guide rails
depending on its diameter. Three adjustable stop positions for the applicator
are available. By exposing an X-ray film the source position within
the afterloading applicator can be determined easily.
Features:
- Very easy to handle
- Guide rails for appplicators with different widths
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