CAPINTEC, INC.
CRC
®
-712MH
CHAPTER 6
MEASUREMENT PROCEDURES
GENERAL
Instructions for the measurement of a radioisotope sample or a radiopharmaceutical dose
are given in this section.
PRE-MEASUREMENT PROCEDURES
The Quality Assurance Daily Test needs to be performed each working day, prior to the
measurement of any radioisotope sample or radiopharmaceutical dose that may be
administered to a patient. The Daily Tests consist of the Zero Adjustment, the Background
Adjustment, the Battery Test, the Contamination Test, and the Reference Source Test.
Refer to CHAPTER 5: QUALITY ASSURANCE AND ACCEPTANCE TESTING; SECTION:
ACCEPTANCE TESTING to perform these test procedures.
PRESET ISOTOPE MEASUREMENT
The CRC
®
-712MH provides eight preset radioisotope selection buttons for a quick selection
of the most often used isotopes.
As the user requirements are different for each nuclear medicine facility, the procedure to re-
assign these preset buttons for other radioisotopes is provided in CHAPTER 4: SYSTEM
SETUP; SECTION: REASSIGNMENT OF A PRESET PUSH-BUTTON.
To measure the activity of one of these 8 preset radioisotopes:
1. Verify that the Zero and Background adjustments of the calibrator are within the
specified limits. (Reference CHAPTER 5: QUALITY ASSURANCE AND
ACCEPTANCE TESTING; SECTION: ACCEPTANCE TESTING.)
2. Select the appropriate isotope and range push-buttons.
Note: If the activity range is not known, select the AUTO-RANGE push-button for
the fastest measurement.
If numerous measurements are being made in the same activity range, select
the specified range for the faster measurements.
3. Insert the sample into the Ionization Chamber well (with well liner), by means of the
plastic Sample Holder.
4. Observe that the display stabilizes and the proper units are displayed.
January 08
MEASUREMENT PROCEDURES
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