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The Parathyroid Glands00:59

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Related Experiment Video

Updated: Oct 29, 2025

Establishment of a Simple and Effective Rat Model for Intraoperative Parathyroid Gland Imaging
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Locating hyperfunctioning parathyroid glands using 11C-Choline PET/CT: an inter- and intra-observer variation study.

Julie Wulf Christensen1, Lars Thorbjørn Jensen2, Susanne Bonnichsen Søndergaard2

  • 1Department of Nuclear Medicine, Herlev and Gentofte Hospital, 2730, Herlev, Denmark. juliewulfc@gmail.com.

European Journal of Hybrid Imaging
|July 6, 2021
PubMed
Summary
This summary is machine-generated.

11C-Choline PET/CT is a reliable imaging method for locating hyperfunctioning parathyroid glands in primary hyperparathyroidism. This technique is not reader-sensitive, allowing for broader implementation in clinical practice.

Keywords:
11C-Choline PET/CTHyperparathyroidismInter-observer agreementIntra-observer agreement

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Area of Science:

  • Nuclear Medicine
  • Radiology
  • Endocrinology

Background:

  • 11C-Choline PET/CT is increasingly used for detecting hyperfunctioning parathyroid glands in primary hyperparathyroidism.
  • Evaluating the robustness of this imaging method is crucial for determining its widespread applicability.

Purpose of the Study:

  • To assess the intra- and inter-observer agreement of 11C-Choline PET/CT for parathyroid gland localization.
  • To determine if the method is reader-sensitive and requires specialized centers.

Main Methods:

  • PET/CT images from 40 primary hyperparathyroidism patients were analyzed by three readers (one expert, two non-experts).
  • Intra- and inter-observer agreement was calculated using Fleiss' kappa method.
  • Sensitivities and specificities of non-expert readers were compared against the expert reader.

Main Results:

  • Good to near-perfect intra-observer agreement was achieved across all readers.
  • Inter-observer agreement was good, with kappa values ≥ 0.74.
  • High sensitivities (>81% for side, 75% for quadrant) and specificities (>94%) were reported, with high reader confidence in most cases.

Conclusions:

  • 11C-Choline PET/CT is not reader-sensitive for localizing hyperfunctioning parathyroid glands.
  • The method can be safely implemented in centers with moderate case volumes, provided cyclotron access for 11C-Choline production.
  • The study adhered to ethical guidelines, including the Helsinki Declaration and ICH-GCP.