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23
1313DXT-I/1515DXT-I/2520DX-I/3030DX-I X-ray Detectors
U
SER
M
ANUAL
9.0
Modes Of Operation
The PaxScan product family supports a number of modes of operation as defined in
general, there is a trade-off between varying operation modes of resolution in respect to field of
view, frame rate or noise. The sensitivity of the detector is optimized to match the X-ray dose
used in each mode.
The purpose of each mode is to configure the detector to achieve optimal performance during
specific imaging procedures. Modes are defined by a combination of factors such as pixel
binning, frame rates, analog gain, field-of-view and continuous versus single acquisition. Each
mode requires a unique set of calibration files. Refer to the ViVA Online help documentation for
complete details.
Each operating mode employs all types of calibration. In accumulation-type acquisitions the
PaxScan product family will sum a number (limited by available memory) of frames and
normalize the result before displaying a new image via the video output ports.
Note
The system may be in only one mode at a given moment.
Not every mode will be available with every system. The OEM should work
with Varex technical support for configuration of the mode(s) which best
suit the customers intended application.
Table 18
Operational Mode Examples 1313DXT-I
Mode
Max
Frame
Rate (Hz)
Pixel
Binning
Gain/
Capacitor
(pF)
Image
Area
Frame Size
Active
Frame Size
Acq.
Type
High Dose
Fluoroscopy
56
2 × 2
1 / 4.0pF
Full
Field
576 × 576
566 × 566
Continuous
Normal
Fluoroscopy
56
2 × 2
2 / 0.5pF
Full
Field
576 × 576
566 × 566
Continuous
Full-Resolution
/ High Dose
Fluoroscopy
28
1 × 1
2 / 0.5pF
Full
Field
1152 × 1152 1142 × 1142 Continuous
