System Operation
RTR-4 Operator’s Manual
4-30
SAIC Proprietary
120300 Rev. D
Fire and Sum X-Ray Dialog Box
Selecting
Fire and Sum X-Ray
command captures the first
image. The Acquire dialog box appears again automatically. If the
first image is adequate, select
Cancel
. If not, set the option
values and select
Fire and Sum X-Ray
again. This adds the
newly-acquired image to the sum of the previous images.
Using the
Sum
command can help produce images with superior
signal-to-noise ratios (SNR), by adding multiple acquisitions,
thus achieving higher grayscale values in the resulting image. Be
sure the Contrast Stretch is set to Default before starting so the
image does not wash out prematurely.
Disable Acquire
The
Disable Acquire
command is depicted by
button at
the end of the toolbar. This button is only visible on those systems
which do not have the optional
Interlock Safety Key
. When the
button is depressed (the default state)
Acquire
is enabled and the
system responds as normal. When this icon is enabled, the user is
prompted to enter a password. This password will be required to
re-enable the
Acquire
command. The password is not retained
for future use; a new password is requested each time the function
is activated. This function acts as a software safety interlock, and
can be used to prevent another user from accidentally firing the
X-Ray source.