Errata
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In the article “MIRD Pamphlet No. 25: MIRDcell V2.0 Software Tool for Dosimetric Analysis of Biologic Response of Multicellular Populations” (*J Nucl Med.* 2014;55:[1557–1564](https://doi.org/10.2967/jnumed.113.131037)), the methods incorrectly state that the 2-D and 3-D cell geometries are close-packed square lattice and close-packed cubic lattice, respectively. Rather, they are simple square lattice and simple cubic lattice, respectively. The authors regret the incorrect statement.

In the article “Borderline Findings in *O*-(2-[18F]-Fluoroethyl)-l-Tyrosine PET of Patients with Suspected Glioma Relapse: Role in Clinical Practice” (*J Nucl Med.* 2025;66:[187–193](https://doi.org/10.2967/jnumed.124.268768)), a systematic error in calculations, leading to an overestimation of sensitivity and negative predictive values in Table 2 and Supplemental Tables 2 and 3, was discovered. Revised Table 2 is provided below, and revised Supplemental Tables 2 and 3 are provided in the supplemental materials of the original article. In addition, in the abstract on page 187, final diagnoses of tumor relapse were confirmed by histopathology in 263 [not 175] patients and by clinical course in 176 [not 264] patients. On page 191 in the Discussion, the diagnostic performance showed a lower sensitivity (69%–73%) and a lower specificity (67%–70%) [not a higher sensitivity (94%–95%) but a lower specificity (67%–70%)]. The authors regret the errors.

View this table:
[TABLE 2](http://jnm.snmjournals.org/content/66/5/828/T1)

TABLE 2 
Diagnostic Performance of Quantitative Parameters of 18F-FET Uptake in Visual Analysis

*   © 2025 by the Society of Nuclear Medicine and Molecular Imaging.