1. INTRODUCTION
5.
Once a High Voltage Adjustment is started, it will run until it is completed unless you choose to
abort. When it is completed, the system will inform you and then shift to the other detector to allow
you to do another high voltage adjustment if desired.
6.
Click on <Continue> to return to the Calibration page.
NOTE: If you have started a high voltage adjustment and wish to stop, click <Abort>. This will stop the
count. Click <Continue> to return to the Administration page.
Chi-Square
(See Figures 3-5 and 3-6.)
As is the case with Daily Calibration, Chi-Square is performed using a 10 µCi Cs-137 button source. The
Chi-Square Test is independent of the counting time, counting rate, and number of counts performed. For
this reason, Chi-Square is a very valuable test for a detector system which is recording truly random
events. For example, if systematic failure occurs at low counting rates but passes at high rates, there is an
indication of a non-random event occurring which is comparable to the low counting rates. Since time is
precise to within 10 microseconds with a crystal controlled clock, 10 second count times should have very
little error due to the timer itself.
The number of counts performed is 10, which determines the number of degrees of freedom (9) for the
analysis. The lower limit is 4.168, the upper limit is 14.68. These correspond to a 90% probability for
passing the lower limit, and 10% probability for passing the upper limit, respectively. In all, one would
expect a 20% failure rate frequency for the Chi-Square test. It is not reasonable to always pass or always
fail Chi-Square without raising concerns that there may be a systematic problem in the detector or
counter.
NOTE: The system stores the information for the latest Chi-Square test performed on a detector. Chi-Square can be
performed as frequently as desired, but is generally performed quarterly.
To Perform Chi-Square
1. Click on the <Chi-Square> tab in the center of the Calibration screen. This brings up the Chi-Square
screen.
2. Select the detector on which to perform a Chi-Square. The arrow in the detector box will bring up
your choice of detectors. Highlight the appropriate detector and proceed.
3. Position the 10 µCi Cesium source in front of the appropriate detector. Click on <Start> and the
system will automatically perform a Chi-Square test on the selected detector.
4. The system will display the elapsed time and the pass number that is currently being counted. The
pass number is the sample number currently in progress. The system will automatically increment
until all 10 passes or samples have been counted. At the completion of the 10th pass the system will
calculate Chi-Square and display the value on the screen, along with a passed or failed note. At this
point the result is entered into the system memory.
5. You can print out a Chi-Square report by clicking on the <Report> icon in the primary tool bar and
then choosing Chi-Square.
6. If desired, enter the technologist and any comments you want printed with the report. To review
what is going to be shown, click on <Preview>. To just print, click on <Print>. In print the default is
ALL, which will print the latest Chi-Square reports for both well and probe. If you only performed
one Chi-Square at this time, highlight pages from 1 to 1 for probe, or from 2 to 2 for well only.
ADMINISTRATION
3-8
Summary of Contents for 187-130
Page 8: ...1 INTRODUCTION SETUP INSTRUCTIONS 2 2 Figure 2 1 The MCA Uptake Stand ...
Page 10: ...1 INTRODUCTION SETUP INSTRUCTIONS 2 4 Figure 2 2 The MCA Uptake Stand side view ...
Page 20: ...1 INTRODUCTION SETUP INSTRUCTIONS 2 14 Figure 2 6 The System Setup Screen ...
Page 25: ...1 INTRODUCTION 2 19 SETUP INSTRUCTIONS Figure 2 8 The Database Manager Screen ...
Page 28: ...CONTENTS 3 3 ADMINISTRATION Figure 3 1 The Calibration Screen ...
Page 29: ...1 INTRODUCTION Figure 3 2 A Calibration Report ADMINISTRATION 3 4 ...
Page 31: ...1 INTRODUCTION Figure 3 3 The High Voltage Adjustment Screen ADMINISTRATION 3 6 ...
Page 32: ...1 INTRODUCTION Figure 3 4 The High Voltage Report 3 7 ADMINISTRATION ...
Page 34: ...1 INTRODUCTION Figure 3 5 The Chi Square Screen 3 9 ADMINISTRATION ...
Page 35: ...1 INTRODUCTION Figure 3 6 The Chi Square Report ADMINISTRATION 3 10 ...
Page 37: ...1 INTRODUCTION Figure 3 7 An Administration Report ADMINISTRATION 3 12 ...
Page 39: ...ADMINISTRATION 3 14 1 INTRODUCTION Figure 3 8 The Isotope Editing Screen ...
Page 40: ...1 INTRODUCTION 3 15 ADMINISTRATION Figure 3 9 The Select Isotope Window ...
Page 42: ...1 INTRODUCTION 3 17 ADMINISTRATION Figure 3 10 The Detector Efficiency Screen ...
Page 44: ...1 INTRODUCTION Figure 3 11 The Geometric Efficiency Window 3 19 ADMINISTRATION ...
Page 48: ...1 INTRODUCTION 3 23 ADMINISTRATION Figure 3 13 A Spectrum Analysis Report ...
Page 50: ...1 INTRODUCTION Figure 4 1 The Procedure Definition Screen THYROID UPTAKE 4 2 ...
Page 51: ...1 INTRODUCTION 4 3 THYROID UPTAKE Figure 4 2 The Patient Definition Screen ...
Page 56: ...THYROID UPTAKE 4 8 1 INTRODUCTION Figure 4 3 The Thyroid Uptake Screen ...
Page 58: ...THYROID UPTAKE 4 10 1 INTRODUCTION Figure 4 4 A Thyroid Uptake Report ...
Page 59: ...1 INTRODUCTION Figure 4 5 A Time Activity Report 4 11 THYROID UPTAKE ...
Page 63: ...MANUAL MODE 5 2 1 INTRODUCTION Figure 5 1 The Manual Mode Screen ...
Page 64: ...1 INTRODUCTION 5 3 MANUAL MODE Figure 5 2 A Manual Mode Report ...
Page 66: ...1 INTRODUCTION WIPE TEST 6 2 Figure 6 1 The Wipe Counting Screen ...
Page 67: ...6 3 WIPE TEST CONTENTS Figure 6 2 The Wipe Area Setup Screen ...
Page 68: ...CONTENTS WIPE TEST 6 4 Figure 6 3 The Wipe Preferences Window ...
Page 70: ...1 INTRODUCTION Figure 6 4 The Background LLD Screen WIPE TEST 6 6 ...
Page 72: ...1 INTRODUCTION WIPE TEST 6 8 Figure 6 5 The Wipe Results Report ...
Page 76: ...1 INTRODUCTION 7 3 BIOASSAY Figure 7 2 The Bioassay Preferences Screen ...
Page 78: ...7 5 BIOASSAY CONTENTS Figure 7 3 An Individual Bioassay Report ...
Page 79: ...CONTENTS Figure 7 4 An Employee Bioassay Summary BIOASSAY 7 6 ...
Page 80: ...1 INTRODUCTION 7 7 BIOASSAY Figure 7 5 An Individual Bioassay History Summary ...
Page 82: ...1 INTRODUCTION SCHILLING TESTS 8 2 Figure 8 1 Defining a Facility Standard Schilling Test ...
Page 83: ...CONTENTS 8 3 SCHILLING TESTS Figure 8 2 The Schillings Counting Page ...
Page 84: ...CONTENTS SCHILLING TESTS 8 4 Figure 8 3 A sample Schillings Mallinckrodt Report ...
Page 87: ...CONTENTS 8 7 SCHILLING TESTS Figure 8 4 The Diopac Schillings Counting Page ...
Page 88: ...SCHILLING TESTS 8 8 CONTENTS Figure 8 5 A Sample Diopac Schillings Report ...
Page 90: ...CONTENTS HEMATOLOGY 9 2 9 1 The IHSA Counting Page ...
Page 92: ...1 INTRODUCTION HEMATOLOGY 9 4 Figure 9 2 A Sample IHSA I 125 Test Report ...
Page 93: ...CONTENTS 9 5 HEMATOLOGY Figure 9 3 The CR 51 Counting Page ...
Page 95: ...CONTENTS 9 7 HEMATOLOGY Figure 9 4 A Sample Cr 51 Volume Test Report ...
Page 96: ...CONTENTS Figure 9 5 The Cr 51 Red Blood Cell Survival Counting Page HEMATOLOGY 9 8 ...
Page 98: ...CONTENTS HEMATOLOGY 9 10 Figure 9 6 A sample Cr 51 Survival Test Report ...
Page 100: ...CONTENTS Figure 9 7 The GFR Counting Page HEMATOLOGY 9 12 ...
Page 103: ...1 INTRODUCTION 9 15 HEMATOLOGY Figure 9 8 A One Sample Glomerular Filtration Rate Report ...
Page 104: ...1 INTRODUCTION HEMATOLOGY 9 16 Figure 9 9 A Two Sample Glomerular Filtration Rate Report ...
Page 106: ...1 INTRODUCTION HEMATOLOGY 9 18 Figure 9 10 The ERPF Counting Page ...
Page 108: ...1 INTRODUCTION HEMATOLOGY 9 20 Figure 9 10 The ERPF Counting Page ...
Page 109: ...1 INTRODUCTION 9 21 HEMATOLOGY Figure 9 11 An Effective Renal Plasma Flow Report ...