Pregled bibliografske jedinice broj: 730763
ACTIVITY QUANTIFICATION OF 133Ba SOURCES IN WATER PHANTOM
ACTIVITY QUANTIFICATION OF 133Ba SOURCES IN WATER PHANTOM // Nuklearmedizin
Šibenik, Hrvatska, 2014. str. A 136-A 136 (predavanje, međunarodna recenzija, sažetak, ostalo)
CROSBI ID: 730763 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
ACTIVITY QUANTIFICATION OF 133Ba SOURCES IN WATER PHANTOM
Autori
Grošev, Darko ; Lončarić, Srećko ; Huić, Dražen ; Medvedec, Mario
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo
Izvornik
Nuklearmedizin
/ - , 2014, A 136-A 136
Skup
The Eighth International Congress of the Croatian Society of Nuclear Medicine
Mjesto i datum
Šibenik, Hrvatska, 09.05.2014. - 12.05.2014
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
nuclear medicine procedures; dosimetric studies
Sažetak
Quantitative information about spatial and temporal distribution of radioisotope in nuclear medicine procedures is important for dosimetric studies. 133Ba is suitable isotope (E=356 keV, T1/2=10.5 y) for simulation of 131I (E=364 keV, T1/2=8 d) imaging in radioiodine and radionuclide therapy. We imaged 4 cylindrical 133Ba sources in a cylindrical water phantom. Activity of each source was < 1.5 MBq. The sources were produced at the National Institute of Standards and Technology (NIST, USA). Planar and SPECT measurements were done on a dual head gamma camera. Triple-energy window (TEW) acquisition was performed for scatter correction. In planar measurements, transmission flood source (57Co) was used for attenuation correction (AC). In SPECT imaging, CT-based AC was applied. From measurements in air of calibration source the sensitivity factor was obtained in cps/MBq. Three consecutive acquisitions were performed in order to evaluate the reproducibility of the measurements. The results of activity measurements for the calibration source, A0=0.91 MBq, showed that Aplanar= 0.730.03 MBq ; ASPECT=0.920.01 MBq. SPECT measurements with CT-based AC produced result accurate within 2%, while planar measurements underestimated activity by 20%. Therefore SPECT/CT imaging should be used for accurate dosimetry. Acknowledgement: This work is a part of the collaboration with the International Atomic Energy Agency (IAEA, Vienna) under the Coordinated Research Project E2.10.07.
Izvorni jezik
Engleski
