Dilon Navigator 2.0, User & Service Manual, Page: 30 / 43

Navigator 2.0 User Manual & Service Guide
N2-5000-07-001 Rev 7 -
30-
Revised 10/16/2018
www.Dilon.com
6. Running the Peak Procedure: 12mm Lymphatic
Mapping Probe Only
It is important to note that the 12mm Lymphatic Mapping Probe DOES NOT use the
‘Calibration
Verification Quick Test
’, instead, the probe-control unit configuration is brought to its highest
sensitivity point via the
‘Peak Procedure,’ described below.
7A. Running a Peak Procedure
A Peak Procedure finds the best
“sensitivity” of a probe when “paired” with a control unit. The setting
on the gain module at which the probe counts the most events.
Adjusting the gain module dial increases/decreases the count rate in the Navigator 2.0 Display.
Starting with the control unit turned
on
and the dial in the
full counter-clockwise position (0)
, the
location on the gain module
dial
where the count rate reaches its
maximum value
is called the
Peak
Setting
. The system should then be left in this setting for any subsequent procedures that day.
The probe
must
be held in a fixed position with respect to an isotope source during a Peak Procedure.
This source can be either a check source or the injection site (or some other region of high activity)
of the patient.
Only the Navigator 12mm Lymphatic Mapping Probe requires a Peak Procedure, because it is the
only probe that uses the gain module. The Peak Procedure should be performed on EACH day of
use, before the first surgical procedure.
Above: Example of a Peak Procedure using a Cobalt-57 check source
Table 7A-1. Example: Using and “pairing” multiple 12mm Sentinel Node Mapping Probes