Siemens ARTIS 2 S Service Manual Page 327

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Image Viewing and Image Processing
Image Postprocessing
AXIOM Artis AXA4-100.620.08.01.02 63 / 112
Calibration
To perform a measurement (e.g. distance), the image must be calibrated.
If a calibration is stored with the image, this calibration can be used. If an image
is not calibrated or if you want to improve the calibration, you can perform manual
calibration based on known dimensions of an object in the image.
Calibration methods
Depending on the examination, you can use different calibration methods:
automatic
o Auto ISO
Calibration is performed fully automatically for an organ positioned in the iso-
center (= rotation center) on the basis of the known exposure geometry.
Siemens Service performs an exact calibration for this exposure geometry
during installation of the system.
Advantage: You can work quickly.
Disadvantage: This calibration method should be used only if the organ to
be examined was in the isocenter during the acquisition. Otherwise there
can be significant measuring uncertainties.
semi-automatic
o TOD (table-object distance)
The calibration is automatically computed based on the known exposure ge-
ometry. You only need to enter the TOD.
Siemens Service performs a precise calibration when the system is installed.
Advantages: The TOD is same in the supine position for most patients. You
can work quickly.
Disadvantage: The error in the TOD value limits the measurement accu-
racy.
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Comments to this Manuals

Muhammad Tayyab 29 May 2024 | 13:54:32

please change download setting

Luis Garcis 14 Aug 2025 | 03:20:27

Good publicatoon