title: A new experimental procedure for determination of photoelectric efficiency of a NaI(Tl) detector used for nuclear medicine liquid waste monitoring with traceability to a reference standard radionuclide calibrator.
abstract: To determine photopeak efficiency for (99m)Tc of the NaI(Tl) detector used for liquid waste monitoring at the Nuclear Medicine Unit of IRCCS Paediatric Hospital Bambino Gesù in Rome, a specific experimental procedure, with traceability to primary standards, was developed. Working with the Italian National Institute for Occupational Prevention and Safety, two different calibration source geometries were employed and the detector response dependence on geometry was investigated. The large percentage difference (almost 40%) between the two efficiency values obtained showed that geometrical effects cannot be neglected.
authors.affiliation: National Institute for Occupational Prevention and Safety, Ionizing Radiation Laboratory, Via Fontana Candida, 1 00040 Monte Porzio Catone, Italy. alessia.ceccatelli@gmail.com
authors.forename: A
authors.initials: A
authors.lastname: Ceccatelli
authors.forename: F
authors.initials: F
authors.lastname: Campanella
authors.forename: G
authors.initials: G
authors.lastname: Ciofetta
authors.forename: F M
authors.initials: FM
authors.lastname: Marracino
authors.forename: V
authors.initials: V
authors.lastname: Cannatà
mesh_terms: D002138:Calibration; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008506:Medical Waste / Q000032:analysis*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000295:instrumentation* / Q000592:standards*; D011850:Radioactive Waste / Q000032:analysis*; D019275:Radiopharmaceuticals / Q000032:analysis*; D012015:Reference Standards; D015203:Reproducibility of Results; D012384:Rome; D012680:Sensitivity and Specificity; D012974:Sodium Iodide / Q000528:radiation effects*; D012996:Solutions
chemical_list: D008506:Medical Waste; D011850:Radioactive Waste; D019275:Radiopharmaceuticals; D012996:Solutions; D012974:Sodium Iodide