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A proposal for phosphor imager acceptance testing procedure and routine quality controls in nuclear pharmacy practice
Nicoletta Urbano1, Sergio Modoni
1Department of Nuclear Medicine, University Hospital Ospedali Riuniti, Foggia, Italy. n.urbano@virgilio.it
Nuclear Medicine Communications
|June 10, 2011
Summary
This study developed a new quality control method for digital autoradiography systems used in nuclear medicine. The proposed tests ensure accurate quantitative imaging of radioactivity distribution for various samples.
Area of Science:
- Nuclear Medicine
- Medical Imaging
- Quality Control
Background:
- Digital autoradiography is crucial for quantitative radioactivity distribution imaging in nuclear medicine.
- Existing instruments require specific acceptance testing and routine quality control procedures.
- Standardized tests are needed to ensure the reliability of radioactivity measurements.
Purpose of the Study:
- To define a set of tests for acceptance testing and routine quality control of digital autoradiography systems.
- To establish a reliable procedure for ensuring instrument performance in quantitative imaging.
Main Methods:
- Analyzed phosphor screen and photometer components over a 3-month period.
- Utilized self-manufactured equipment including phantoms, lead plates, and cylinders.
- Performed tests for integral uniformity (IU), differential uniformity (DU), resolution, geometric linearity, and sensitivity.
Main Results:
- Screen integral uniformity (IU) was 19.7 ± 2.3% (UFOV) and 11.1 ± 3.7% (CFOV).
- Screen resolution (full-width at half-maximum) was 19.4 ± 0.08 mm; sensitivity was 505.1 ± 10.4 DLUs.
- Photometer resolution was 0.5 ± 0.076 mm, with IU and DU within acceptable ranges.
Conclusions:
- The proposed methodology offers an easy, accurate, and quick tool for digital autoradiography quality control.
- This approach can guarantee the correct basic function of the instrument for quantitative imaging applications.
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