000029559 001__ 29559 000029559 005__ 20170601200029.0 000029559 0247_ $$2DOI$$a10.1667/0033-7587(2001)156[0419:TSADDF]2.0.CO;2 000029559 0247_ $$2WOS$$aWOS:000171327000010 000029559 037__ $$aPreJuSER-29559 000029559 041__ $$aeng 000029559 082__ $$a610 000029559 084__ $$2WoS$$aBiology 000029559 084__ $$2WoS$$aBiophysics 000029559 084__ $$2WoS$$aRadiology, Nuclear Medicine & Medical Imaging 000029559 1001_ $$0P:(DE-HGF)0$$aLi, Y. L.$$b0 000029559 245__ $$aTrack structures and dose distributions from decays of I-131 and I-125 in and around water spheres simulating micrometastases of differentiated thyroid cancer 000029559 260__ $$aGreat Falls, Va.$$bRadiation Research Society$$c2001 000029559 300__ $$a419 - 429 000029559 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article 000029559 3367_ $$2DataCite$$aOutput Types/Journal article 000029559 3367_ $$00$$2EndNote$$aJournal Article 000029559 3367_ $$2BibTeX$$aARTICLE 000029559 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000029559 3367_ $$2DRIVER$$aarticle 000029559 440_0 $$05239$$aRadiation Research$$v156$$x0033-7587 000029559 500__ $$aRecord converted from VDB: 12.11.2012 000029559 520__ $$aThe disintegration of the radionuclides I-131 and I-125 and the subsequent charged-particle tracks left behind in water (as a model substance for a biological cell) are simulated by the Monte Carlo track structure simulation code PARTRAC, using new inelastic electron scattering cross sections for condensed water. Every photon and electron emitted was followed in detail, event by event, down to 10 eV. From the spatial information on the track structures, absorbed dose distributions per I-131 and I-121 decay were calculated in and around water spheres simulating micrometastases as well as in the tissue surrounding such metastases. These radionuclides were assumed to be distributed uniformly inside spheres of different diameters (0.01, 0.03, 0.1, 0.3, 1.0 and 3.0 nun). The respective electron degradation spectra, the nearest-neighbor distance distributions between inelastic events, and the distance distributions for all activations for both iodine radionuclides were calculated. The absorbed fractions of the initial electron energies, absorbed doses and energy depositions, and single-event distributions, F-1(epsilon), inside the six water spheres described above and in the surrounding tissue were also calculated. The absorbed doses per decay inside the six water spheres, i.e., the calculated S values (listed from 0.01 to 3.0 nun), were 6.8 x 10(-4), 7.2 x 10(-5), 5.5 x 10(-6), 4.9 x 10(-7), 3.1 x 10(-8) and 1.8 x 10(-9) Gy Bq(-1) s(-1) for I-131, and 3.4 x 10(-3), 1.7 x 10(-4), 5.1 x 10(-6), 2.0 x 10(-1), 5.6 x 10(-9) and 2.2 x 10(-11) Gy Bq(-1) s(-1) for I-125. It is concluded that in the treatment of thyroid cancer, the geometrical track structure properties of I-125 might be superior to those of I-131 in micrometastases with diameters less than 0.1 nun; however, in this medical context, many other factors also have to be considered. (C) 2001 by Radiation Research Society. 000029559 536__ $$0G:(DE-Juel1)FUEK99$$2G:(DE-HGF)$$aBegleitende Arbeiten zur Umgebungsüberwachung$$c51.10.1$$x0 000029559 588__ $$aDataset connected to Web of Science 000029559 650_7 $$2WoSType$$aJ 000029559 7001_ $$0P:(DE-HGF)0$$aFriedland, W.$$b1 000029559 7001_ $$0P:(DE-Juel1)VDB1274$$aPomplun, E.$$b2$$uFZJ 000029559 7001_ $$0P:(DE-HGF)0$$aJacob, P.$$b3 000029559 7001_ $$0P:(DE-HGF)0$$aParetzke, H. G.$$b4 000029559 7001_ $$0P:(DE-HGF)0$$aLassmann, M.$$b5 000029559 7001_ $$0P:(DE-HGF)0$$aReiners, C.$$b6 000029559 773__ $$0PERI:(DE-600)2135113-2$$a10.1667/0033-7587(2001)156[0419:TSADDF]2.0.CO;2$$gVol. 156, p. 419 - 429$$p419 - 429$$q156<419 - 429$$tRadiation research$$v156$$x0033-7587$$y2001 000029559 909CO $$ooai:juser.fz-juelich.de:29559$$pVDB 000029559 9131_ $$0G:(DE-Juel1)FUEK99$$bUmweltvorsorgeforschung$$k51.10.1$$lUmweltforschung$$vBegleitende Arbeiten zur Umgebungsüberwachung$$x0 000029559 9141_ $$y2001 000029559 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed 000029559 9201_ $$0I:(DE-Juel1)VDB60$$d31.12.2001$$gASS$$kASS$$lAbteilung Sicherheit und Strahlenschutz$$x0 000029559 970__ $$aVDB:(DE-Juel1)2866 000029559 980__ $$aVDB 000029559 980__ $$aConvertedRecord 000029559 980__ $$ajournal 000029559 980__ $$aI:(DE-Juel1)VDB224 000029559 980__ $$aUNRESTRICTED 000029559 981__ $$aI:(DE-Juel1)VDB224