Quantification of osteoblastic activity in epiphyseal growth plates by quantitative bone SPECT/CT

  • Tomohiko Yamane
  • Ichiei Kuji
  • Akira Seto
  • Ichiro Matsunari
Scientific Article
  • 47 Downloads

Abstract

Objective

Quantifying the function of the epiphyseal plate is worthwhile for the management of children with growth disorders. The aim of this retrospective study was to quantify the osteoblastic activity at the epiphyseal plate using the quantitative bone SPECT/CT.

Materials and methods

We enrolled patients under the age of 20 years who received Tc-99m hydroxymethylene diphosphonate bone scintigraphy acquired by a quantitative SPECT/CT scanner. The images were reconstructed by ordered subset conjugate-gradient minimizer, and the uptake on the distal margin of the femur was quantified by peak standardized uptake value (SUVpeak). A public database of standard body height was used to calculate growth velocities (cm/year).

Results

Fifteen patients (6.9–19.7 years, 9 female, 6 male) were enrolled and a total of 25 legs were analyzed. SUVpeak in the epiphyseal plate was 18.9 ± 2.4 (average ± standard deviation) in the subjects under 15 years and decreased gradually by aging. The SUVpeak correlated significantly with the age- and sex-matched growth velocity obtained from the database (R2 = 0.83, p < 0.0001).

Conclusion

The SUV measured by quantitative bone SPECT/CT was increased at the epiphyseal plates of children under the age of 15 years in comparison with the older group, corresponding to higher osteoblastic activity. Moreover, this study suggested a correlation between growth velocity and the SUV. Although this is a small retrospective pilot study, the objective and quantitative values measured by the quantitative bone SPECT/CT has the potential to improve the management of children with growth disorder.

Keywords

Epiphyseal plate Tc-99m Hydroxymethylene diphosphonate xSPECT bone Ordered subset conjugate gradient minimizer Standardized uptake value 

Notes

Compliance with ethical standards

Conflicts of interest

The authors declare that they have no conflicts of interest.

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Copyright information

© ISS 2018

Authors and Affiliations

  1. 1.Department of Nuclear MedicineSaitama Medical University International Medical CenterHidakaJapan
  2. 2.Division of Nuclear Medicine, Department of RadiologySaitama Medical University HospitalMoroyamaJapan

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