A-1
APPENDIX A
ISOTOPE EFFICIENCY CALCULATION
Your new Atomlab 950 features a 2" x 2" Tube Assembly configuration. The Operations Manual provides
examples of geometric efficiency in Appendix A are based on a tube assembly diameter of 1.75". For the
new 2" diameter Tube Assembly, the example values provided for geometric efficiency should read as
follows:
If the wipe or calibration source is placed 1/2" from the probe, the G.E. = 27.6%
For X = 0.25", G.E. = 37.9%,
For X = 0.75", G.E. = 20.0%
NOTE: The Atomlab 950 is shipped with the Isotope Efficiency screen set to centimeters (see page 3-12 and Figure
3-10). The system can be set to centimeters, inches or any other unit of measure, as long as it is consistent for the
diameter and distance. Please verify that the set-up in the Isotope Efficiency page is set to match the 2" diameter
tube supplied with this unit.
NOTE: 2" diameter = 5.08 centimeters
1.75" diameter = 4,445 centimeters
When the Administration Mode set-up function is changed on the Isotope Efficiency page, the set-up
associated with the detector in the wipe and bioassay programs is automatically altered to match. It is
vital that you verify the correct geometric efficiency to ensure readings obtained in the wipe and bioassay
programs will be correct.
A. Geometric Efficiency (G.E.)
The value for Geometric Efficiency (G.E.) is calculated from the following equations for a well and probe:
WELL:
I.D. = Inner diameter of the well opening
X = Depth into the well, measured from the top surface
Example: The Biodex Nal well dimensions have an I.D. = 0.75 inches and a well depth of 1.432 inches.
When the wipe (or calibration source) is placed in the well, the isotope emitting radiation will not be at
the very bottom. If we take the isotope position to be 1 inch from the top, then G.E. = 96.82%.
(For X = 1.25 inches deep, G.E. = 97.89%
For X = 0.75 inches deep, G.E. = 94.72%, which are +1.07% and -2.1% respectively, from 1 inch.)
PROBE:
O.D. = Outer diameter of the probe
X = Distance from the probe
Example: The Biodex Nal probe O.D. = 2.00 inches. When the wipe (or calibration source) is placed .5 inch
from the probe, then G.E. = 27.64%.
For X = 0.25, G.E. = 37.9%
For X= 0.75, G.E. = 20.0%
APPENDIX A
G.E.
WELL
=
1/2
1+
1
* 100%
1+ ID
2
2X
1
2
G.E.
PROBE
=
1/2
1-
1
* 100%
1+ OD
2
2X
1
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 ...