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. 2022 Mar 8;13:818463. doi: 10.3389/fphys.2022.818463

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Copyright © 2022 Kertész, Beyer, Panin, Jentzen, Cal-Gonzalez, Berger, Papp, Kench, Bharkhada, Cabello, Conti and Rausch.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Contrast vs. noise analysis of the 10 mm, 13 mm, 17 mm and 37 mm spheres in the NEMA IQ phantom filled with ¹⁸F (A,D), ⁶⁸Ga (B,E), and ¹²⁴I (C,F): (A) recovery coefficient vs. noise with ¹⁸F; (B) recovery coefficient vs. noise with ⁶⁸Ga; (C) recovery coefficient vs. noise with ¹²⁴I; (D) contrast-to-noise (CNR) ratio as a function of the number of iterations with ¹⁸F; (E) CNR ratio as a function of the number of iterations with ⁶⁸Ga; (F) CNR ratio as a function of the number of iterations with ¹²⁴I. Empty symbols and solid symbols represent the OSEM reconstructions without and with and PRC, respectively.