notice a dotted line around <Abort>. This means that by pressing the space bar it will automatically stop
and you do not need to move the pointer to that pointer. The <Abort> button stops the system from
counting and also will not retain the information that has been counted during this function.
When the system finishes counting in the upper right you will see what looks like a MCA box sending
information to the computer pictorially. This means that a final download of information is being sent.
After the information is sent, a screen is displayed listing the full width half max (FWHM), the energy in
the peak channel. If this is acceptable click on <Accept> in the pop-up window. If you do not want to
accept it, press <Cancel>.
Both daily calibration and Chi-Square tests are performed using a 10 µCi Cs-137 button source. Once
calibration is underway, the system's unique differential spectrometer automatically measures the peak
height and subtracts the base line - which makes zero adjustment obsolete. It does this for 100,000 pulses
and then plots a spectrum in internal memory. The peak channel is located and equated to 662 keV,
which is the Cs-137 gamma entered. This gives the spectrometer the keV per channel which is used to
calibrate all of the other isotope gains. Each clinical isotope has a ROI defined with lower and upper
energy limits. These energy limits are then converted to channels in the MCA when a particular isotope is
counted. Corrections are made for sodium iodide NaI non-linearity. There is no need to view the
spectrum of calibration or any other isotope, although this is available on the display and in hard copy by
selecting the spectrum icon.
The multi-channel analyzer in the Atomlab 950 has several fixed precision gains and a regulated high
voltage supply. The pulse shapes are digitized and then processed by a high speed digital signal
processor. This processing results in a possible 1024 pulse heights which has zero offset. A spectrum
results when a histogram of these pulse heights (channels) is plotted. Calibration of the spectrometer is
defined as knowing the energy equivalence of each channel. This is accomplished by determining the Cs-
137 spectrum and then calculating the ratio of the 662 keV/peak channel. After calibration, the report
should always print a peak value very close to 662 keV (some precision round-off may occur), and the
change in calibration will be reflected in the keV/channel slope value. The fine gain can be thought of as
a floating point numerical gain. The HV adjust will ultimately determine the maximum energy one can
measure on the gain selected. It can be calculated by multiplying the keV/channel times 1024.
To Perform a Daily Calibration
1.
After the system has been turned ON for at least one hour, select <Calibration> from the Operation
screen. The Calibration menu is now displayed on the screen. Select well or probe in the detector
window.
2.
Position the 10 µCi Cesium-137 source approximately six inches in front of the appropriate detector.
3.
Click on <Start> daily calibration.
4.
The display will tell you that probe calibration is in progress. If calibration is successful, click on
<Accept>. Click on <Ignore> to discard the calibration without saving.
5.
After accepting the calibration, you can print a report by clicking on the <Report> icon in the
primary tool bar at the left of the screen.
6.
In the Report window you can enter the technologist's name and any comments required for these
reports. To review the report, click on <Preview>. To print the report, click on <Print>.
7.
The printer page will now be displayed. If the correct printer is indicated, you can select multiple
copies or, for some reports, the number of the page you want to print.
NOTE: If you just click <Print> the calibration pages for both the well and probe will be printed. If you only performed the
calibration on one detector and only want to print that detector, you must indicate that on the print page. This is done by
adjusting the print range from All to Pages (from XX to XX). You can print at anytime the latest calibration screens for each
detector.
1. INTRODUCTION
ADMINISTRATION
3-2
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 ...