Carestream Quantum Odyssey HF QG-32, Operator'S Manual, Page: 78 / 102

Chapter 4 APR Editor
Revision Q HF Series X-ray Generators - Operator’s Manual
4-12
Quantum Medical Imaging, LLC
NOTE: The AUX receptor is functional on
systems equipped with the "Universal
AEC" option; it is usually reserved for
Tomo receptor selection.
f. For AEC-enabled exposures, select the desired ion chamber
field combination using the three AEC field keys on the oper-
ator control panel. A configuration of three boxes (repre-
senting AEC chamber detectors) is depicted on the LCD (see
Figure 4-10, item e). A solid box indicates that a field is
selected for use.
IMPORTANT: Do not change the CM STEP
value setting if you are only reviewing
procedure values or if you only want to
change one or more of the procedure’s
exposure values. Doing so will change
the relationship between patient thick-
ness and corresponding exposure factors.
g. The CM STEP field (Figure 4-10, item f) sets the "thickness
step size value"; this value determines the size, in centime-
ters (CM), between each of the ten patient size (thickness)
set points for this procedure. The displayed value is the cur-
rent thickness step size setting. Using Figure 4-10 as an
example, the CM STEP value indicated is "4". Therefore, if
the minimum or "Base CM" value is set to "10 CM", this con-
figuration establishes the following series of patient size
(thickness) set points at which the exposure values can be
programmed:
• 10 CM
• 14 CM
• 18 CM
• 22 CM
• 26 CM
• 30 CM
• 34 CM
• 38 CM
• 42 CM
• 46 CM
As shown in the example above, starting at 10 CM, there are
nine 4-CM "steps". The "CM STEP" value and number of
steps (9) determine the total thickness (CM) range for the
procedure
(9 x 4 = 36).
CM STEP VALUE = 4
46 CM - 10 CM = 36 CM RANGE