Fluke Biomedical 8000 Victoreen - Manual (Page 23)

Operation
Modes of Operation
2
2-11
Mammo Mode
Mammo mode is used to make measurements on mammographic x-ray generators. Mammo mode
simultaneously measures kVp, exposure, exposure time and mAs from a single mammographic
exposure.
Fluoro Mode
Fluoro mode is used to make measurements on fluoroscopic x-ray generators. Fluoro mode supports
both continuous fluoro and pulsed fluoro measurements. In the continuous fluoro mode, the NERO mAx
measures kVp, exposure rate (R/min) and mA. In the pulsed fluoro mode, the NERO mAx measures
kVp, exposure rate (R/min and mR/pulse) and mAs/pulse.
AMSE Mode
AMSE mode is used for Automated Measurement of Sequential Exposures. This mode is used to
measure the output of CINE X-ray generators. In AMSE mode, the NERO mAx measures kVp, exposure
rate (mR/frame), mAs/frame and time/frame (mS/frame).
CT Exposure Mode
CT Exposure mode is used to make CT exposure measurements using the Victoreen 6000-100 or 6000-
200 CT ion chamber. A CT probe must be connected to the NERO mAx detector’s external ion chamber
input in this mode. The exposure is calculated using the user entered beam width (in mm) and the CT
probe’s calibration factor (Rcm/nC). This mode functions in the same manner as the Exposure Mode with
the addition of beam width entry.
Exposure Mode
Exposure mode is used to make exposure and rate measurements using the NERO mAx’s internal ion
chamber or an external ion chamber. The exposure is calculated using the selected ion chamber’s stored
calibration factor.
HVL Mode
In the HVL mode, the NERO mAx calculates half value layer based upon a series of exposure or rate
measurements made with varying thicknesses of aluminum absorbers placed in the x-ray beam. A
minimum of two exposures are required and up to ten exposures may be used. The exposure or rate
measurements may be made using the NERO mAx’s internal ion chamber or an external ion chamber.
Exposure and rate are calculated using the selected ion chamber’s calibration factor and when using a
CT chamber, beam width.
Calibrate Mode
The Calibrate mode is used to enter and store calibration factors for ion chambers used with the NERO
mAx. Calibration factors are available for the NERO mAx’s internal chamber and external chambers,
including the Victoreen CT chamber.
Setup Mode
The Setup Mode is used to setup various features of the NERO mAx. From the setup screen the user
can set the instruments internal real time clock, set the temperature and pressure used in air density
correction of exposure measurements, select exposure units of either Roentgens or Grays, turn automatic
printing on or off, turn the clock display on or off and select normal or reverse video on screen clock
display.
Unit ID
Displays the NERO mAx’s serial number, firmware part number and revision.