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Correction to: Variability in lutetium-177 SPECT quantification between different state-of-the-art SPECT/CT systems

The Original Article was published on 11 February 2020

Correction to: EJNMMI Phys 7, 9 (2020)

https://doi.org/10.1186/s40658-020-0278-3

Following publication of the original article [1], it was reported that the sphere volumes defined in the original article should be adjusted. The correct inner diameters (and volumes) of the spherical inserts were: 9.9 mm (0.5 ml), 15.4 mm (2.0 ml), 19.8 mm (4.0 ml), 24.8 mm (8.0 ml), 31.3 mm (16.0 ml) and 60 mm (113 ml). Figures 3, 5 and 6 have been adjusted accordingly.

Fig. 3
figure1

Recovery coefficient as a function of sphere diameter for all systems separately (A-E) and for all systems combined (F), for data reconstructed with a vendor specific algorithm. Median and range of three repetitive measurements per system. A) Discovery NM/CT 670 Pro; B) Symbia Intevo Bold with xSPECT Quant; C) Symbia Intevo Bold with Broad Quantification; D) Symbia T16 system 1; E) Symbia T16 system 2; F) Mean and standard deviation. All data were fitted with a 3-parameter logistic function (dashed line: 95% CI), for the combined data (F) also the 95% prediction interval is indicated (dashed area)

Fig. 5
figure2

Recovery coefficient as a function of sphere diameter for all systems separately (A-E) and for all systems combined (F), for data reconstructed with a vendor neutral algorithm. Median and range of three repetitive measurements per system. A) Discovery NM/CT 670 Pro; B) Symbia Intevo Bold with xSPECT Quant; C) Symbia Intevo Bold with Broad Quantification; D) Symbia T16 system 1; E) Symbia T16 system 2; F) Mean and standard deviation for all systems combined. All data were fitted with a 3-parameter logistic function (dashed line: 95% CI), for the combined data (F) also the 95% prediction interval is indicated (dashed area

Fig. 6
figure3

Comparison in range over all systems in RCmean (A) and RCmax(B) per sphere diameter for data reconstructed with a vendor specific algorithm versus a vendor neutral algorithm. Third and fourth columns give the same information but for systems of only one vendor, thus consisting of equal system hardware

The original article has been updated.

Reference

  1. 1.

    Peters SMB, Meyer Viol SL, van der Werf NR, de Jong N, van Velden FHP, Meeuwis A, et al. Variability in lutetium-177 SPECT quantification between different state-of-the-art SPECT/CT systems. EJNMMI Phys. 2020;7:9 https://doi.org/10.1186/s40658-020-0278-3.

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Correspondence to Steffie M. B. Peters.

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Peters, S.M.B., Meyer Viol, S.L., van der Werf, N.R. et al. Correction to: Variability in lutetium-177 SPECT quantification between different state-of-the-art SPECT/CT systems. EJNMMI Phys 8, 59 (2021). https://doi.org/10.1186/s40658-021-00399-y

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