neoprobe
TM
GDS Operation Manual
AW-000639
Page
26 of 38
Step
Procedure
Result
and hold down Binary Pitch/Dynamic
Pitch mode selection button and press
Mute button - release all buttons at
same time
System Accuracy Check
Following procedure is used to confirm performance of system components is stable and consistent.
NOTE
: Individuals from Nuclear Medicine department familiar with radioactive emissions and measuring equipment
should perform System Accuracy Check below. Ensure that source strength, distance from probe to source, and stray
radiation from other sources do not adversely affect measurements taken. Ensure distance between probe and
radiation source does not change during System Accuracy Check.
Product design includes solid-state sensor and digital electronics technology that does not require periodic
adjustments to compensate for gain “drift” commonly associated with analog photomultiplier electron tube designs.
Use and maintain product as described in this manual. Product is not expected to exhibit any performance drift over
prescribed lifecycle.
Before performing quality checks, make sure probe with BLUETOOTH
®
wireless technology is clean and free from
sources of radioactive contamination. All other sources of radiation emission must be removed from proximity of
probe during procedure. Shielding materials should be positioned to minimize effects of scatter and fluorescence
peaks from radioactive source. Use a
57
Co radioactive source with known strength between 5 and 25 micro Curies
(185 to 925 kBq) during these procedures. Results will differ if you use another radionuclide, source strength, or
source location.
NOTE
: Readings will differ between probe types. See battery housing of Wireless Probes for
“
” or
“
” marking.
1) Wireless Probe with “
” marking, or
“
” with software version 5.02 or earlier
Photo Peak
Efficiency
Only conduct this test with BLUETOOTH
®
wireless technology enabled probes.
1.
Turn on and link a probe to console.
2.
Set to Dynamic Pitch mode with
99m
Tc radionuclide selected.
3.
Place
57
Co radioactive source 20mm in front of probe (or use P-405 Check Source Fixture). Place probe and
source in air above a table or other surface to minimize effects of scattered radiation on measurement.
4.
On console
,
press and hold Target Count Button to perform a 10 second count. Make sure probe does not
move during this process. Record this value.
5.
Press and hold Radionuclide Selection button on back of console to select Open Window (v5.01 and later)*.
6.
On console
,
press and hold Target Count Button to perform a 10 second count. Make sure probe does not
move during this process. Record this value.
7.
Divide
99m
Tc count from step 4 by open window count from step 6. Result should be greater than 40%.
8.
Count-rate ratio determined by this procedure should be stable and consistent over time within ex/-
10% statistical variation of radioactive emissions during recommended counting intervals.
*NOTE
: v4.01 or earlier software does not have Open Window feature, select
125
I to perform this procedure.
2) Cabled Probe, or Wireless Probe with
“
” and software version 6.01 or later
Photo Peak Efficiency
1.
Set unit to Dynamic Pitch mode and press Radionuclide selection button on back of unit to select
57
Co
radionuclide.
2.
Place
57
Co radioactive source 20mm in front of probe (or use P-405 Check Source Fixture). Place probe and
source in air above a table or other surface to minimize effects of scattered radiation on measurement.
3.
Press and hold Target Count Button to perform a 10 second count. Record this value. Make sure probe does
not move during this count.
Artwork No: AW-000639 Revision: A Artwork Status: Released Lifecycle Name: Artwork
PCO No: N/A ECN No: ECN-000214 Release Date: 10/09/2012 Effective Date: 10/09/2012
