Two-bed SPECT/CT versus planar bone scintigraphy: prospective comparison of reproducibility and diagnostic performance.

Nucl Med Commun

Nuclear Medicine Unit, Department of Clinical Oncology and Nuclear Medicine, Faculty of Medicine, Cairo University, Cairo, Egypt.

Published: April 2021

AI Article Synopsis

  • The study aimed to compare the effectiveness and consistency of two-bed single-photon emission computed tomography/computed tomography (TBSCT) images against conventional planar bone scintigraphy (PBS) for diagnosing bone metastasis in patients with solid tumors.
  • Results showed that TBSCT images had a higher level of agreement between different interpreters and were less likely to yield inconclusive results compared to PBS; specifically, TBSCT demonstrated significantly better sensitivity and accuracy, particularly for patients with non-breast cancers.
  • In conclusion, TBSCT not only had better reproducibility but also reduced inconclusive findings, leading to improved diagnostic capabilities for patients with solid tumors overall, with a notable advantage for those who do not have

Article Abstract

Objective: To evaluate the reproducibility and diagnostic performance of two-bed single-photon emission computed tomography/computed tomography (SPECT/CT) images (TBSCT), compared to conventional planar bone scintigraphy (PBS) for the diagnosis of osseous metastasis.

Methods: Patients with known solid tumor, referred to perform PBS, were included in this prospective study. PBS acquisition was followed by TBSCT images, covering at least the chest, abdomen and pelvis. Each modality was interpreted during a separate session by two independent nuclear medicine physicians with 12- and 3-year experience. Reference standard was formulated on the basis of subsequent clinical/imaging/histopathological evidence.

Results: One-hundred and six patients were finally included in our study. A moderate agreement between the two physicians was seen for PBS readings [k = 0.74; 95% confidence interval (CI), 0.61-0.86] which increased to 0.87 (95% CI, 0.77-0.96) for TBSCT. PBS readings were inconclusive in 29/106, compared to 6 for TBSCT. For each reader, TBSCT showed significantly greater sensitivity and accuracy compared to PBS. There was no significant difference in the sensitivity, specificity or accuracy of both modalities in patients with the breast cancer group, whereas TBSCT images have shown significant higher sensitivity and accuracy compared to PBS (P = 0.02 and 0.002, respectively) in nonbreast cancer patients.

Conclusion: TBSCT demonstrated higher reproducibility and significantly decreased the proportion of inconclusive readings of PBS. TBSCT resulted in significant gain in sensitivity and accuracy in the unselected group of patients with solid tumors. However, that gain may be better appreciated in patients with nonbreast cancer.

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http://dx.doi.org/10.1097/MNM.0000000000001353DOI Listing

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