Nuclear Medicine Blog

Nuke-Tek by Ann Marie Alessi

Chi-Square Test Made Easy

September 12, 2014
Ann Marie Alessi, BS, CNMT, NCT, RT(N), FSNMMI-TS, Product Sales Manager, Nuclear Medicine, Biodex Medical Systems, Inc.

A series of data obtained by counting a single radioactive sample repeatedly will always demonstrate variation.  To determine if the variation is due to the natural randomness of radioactive decay or is due to inconsistency in instrument performance, a chi-square (x2) test is performed.

The chi-square test allows you to determine how close a series of counts would come to a true Poisson distribution (bell curve) and provides a measure of the precision of the counting instrument’s performance. >>



Nuke-Tek by Ann Marie Alessi

Radioiodine Bioassays

May 27, 2014
Ann Marie Alessi, BS, CNMT, NCT, RT(N), FSNMMI-TS, Product Sales Manager, Nuclear Medicine, Biodex Medical Systems, Inc.

Radioiodinated compounds and solutions undergo decomposition that may result in the volatilization of radioiodine. If this occurs, individuals working with these materials have a potential for accidental ingestion or inhalation of radioactive iodine. Once inside the body, the iodine concentrates in the thyroid and irradiates that organ. A bioassay program will enable the Radiation Safety staff to monitor and determine the radioiodine burden in an individual’s thyroid. >>



Nuke-Tek by Ann Marie Alessi

Quality Assurance Programs for Uptake Probes and Well Counters

March 31, 2014
Ann Marie Alessi, BS, CNMT, NCT, RT(N), FSNMMI-TS, Product Sales Manager, Nuclear Medicine, Biodex Medical Systems, Inc.

Uptake probes and well counters are subject to various types of malfunctions that can lead to sudden or gradual changes in their performance characteristics. For example, electronic components and detectors can fail or experience a progressive deterioration of function leading to changes in detection efficiency, increased background, etc.

To ensure consistently accurate results quality assurance procedures should be employed on a regular basis for probe and well counter measurement systems. >>



Nuke-Tek by Ann Marie Alessi

Radioaerosol Tips

February 21, 2014
Ann Marie Alessi, BS, CNMT, NCT, RT(N), FSNMMI-TS, Product Sales Manager, Nuclear Medicine, Biodex Medical Systems, Inc.

With the possible shortage of Xenon looming over our heads, many departments will be turning to radioaerosol imaging with Tc-99m DTPA for lung ventilation studies.  If you are only performing these studies during a shortage, you may be a little rusty in remembering some important tips that are useful when performing this procedure.  >>



Nuke-Tek by Ann Marie Alessi

Xenon Effluent Monitoring

January 23, 2014
Ann Marie Alessi, BS, CNMT, NCT, RT(N), FSNMMI-TS, Product Sales Manager, Nuclear Medicine, Biodex Medical Systems, Inc.

Did you know State and Federal regulations require the routine monitoring of trap effluent gas? Noble gases such as xenon in the air present an external source of radiation exposure that must be calculated.  >>



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