Abstract
Objectives
To assess the relationship of subchondral bone tracer uptake (BTU) on SPECT/CT and meniscal pathologies on MRI in patients with painful knees.
Methods
Twenty-five patients who had MRI and SPECT/CT within 3 months without knee surgery or grade ≥3 cartilage lesions were prospectively included. Maximum values of each subchondral femorotibial area were quantified and a ratio was calculated in relation to a femoral shaft reference region, which represented the BTU background activity. Meniscal lesions were graded (intact/degeneration/tear) and meniscal extrusion (no/yes) was assessed using MRI by two musculoskeletal radiologists blinded to the SPECT/CT findings. One-tailed Spearman correlations served for statistics (p < 0.05).
Results
Knees with meniscal degeneration or tear showed a significantly higher BTU in the medial femorotibial compartment (p = 0.045) when compared to intact menisci. Meniscal degeneration was associated with an increased BTU in the lateral femorotibial compartment; however, this was not statistically significant (p = 0.143). Patients with an extruded meniscus showed significantly higher BTU compared to a non-extruded meniscus (p < 0.020).
Conclusions
Medial femorotibial BTU in SPECT/CT was associated with meniscal pathologies. Highest BTU was found in patients with meniscal tears. SPECT/CT appears to be a useful imaging modality to identify patients with overloading or early osteoarthritis.
Key Points
• Meniscal degeneration and tears correlate significantly with increased BTU using SPECT/CT.
• Medial meniscus extrusion is associated with an increased BTU in SPECT/CT.
• SPECT/CT allows detection of overloading and early osteoarthritis.
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Abbreviations
- BTU:
-
Bone tracer uptake
- ICC:
-
Intraclass correlation coefficient
- OA:
-
Osteoarthritis
- SPECT:
-
Single photon emission computerised tomography
- CT:
-
Computerised tomography
- MRI:
-
Magnetic resonance imaging
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The scientific guarantor of this publication is Michael Hirschmann.
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The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
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Felix Amsler kindly provided statistical advice for this manuscript.
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Written informed consent was waived by the Institutional Review Board (EK 228/13).
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Institutional Review Board approval was obtained (EK 228/13).
Study subjects or cohorts overlap
Some study subjects or cohorts have been previously reported in Dordevic et al. [9].
Methodology
• prospective
• diagnostic study
• performed at one institution
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Rechsteiner, J., Hirschmann, M.T., Dordevic, M. et al. Meniscal pathologies on MRI correlate with increased bone tracer uptake in SPECT/CT. Eur Radiol 28, 4696–4704 (2018). https://doi.org/10.1007/s00330-018-5466-3
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DOI: https://doi.org/10.1007/s00330-018-5466-3