Abstract
Purpose
To evaluate the diagnostic and clinical value of SPECT/CT compared to the standard algorithm for patients with persistent symptoms after anterior cruciate ligament reconstructions. The standard algorithm uses clinical information, conventional radiographs, MRI and CT scan, while the trial algorithm uses the same information but SPECT/CT in addition.
Methods
In a diagnostic comparative trial three experienced surgeons evaluated 23 consecutive patients with persistent symptoms after ACL reconstruction using first standard and second the trial algorithm with a time interval. Each rater had to establish a diagnosis and therapeutic decision with each algorithm. On MRI, graft continuity, bone marrow edema, chondral and meniscal lesions, femoral notch osteophytes were evaluated. Bone tracer uptake in SPECT/CT was anatomically analyzed and compared with MRI findings. MRI findings and SPECT/CT tracer uptake were correlated using Spearman’s rho test.
Results
Additional SPECT/CT analysis did not change diagnosis in any case and did not correlate with clinical graft integrity. Treatment decisions remained unchanged as well. Chondral lesions, arthritic changes, meniscal lesions, graft impingement are best visualized in MRI and showed correspondent tracer uptake in SPECT/CT. Tunnel position was well classified with standard CT scan and showed no correlation with SPECT/CT tracer uptake.
Conclusion
Information derived by SPECT/CT in addition to the standard algorithm using clinical information, X-rays, MRI, and CT scan did not change the diagnosis or treatment plan. There is currently no justification to implement SPECT/CT for patients with persistent symptoms after anterior cruciate ligament reconstructions.
Level of evidence
Level II: diagnostic comparative study.
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Change history
20 March 2019
The shared first authorship of Christian Egloff, MD and Lukas Huber was always planned and correctly acknowledged.
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Acknowledgements
Data collection and correlation analysis were mainly conducted by the medical student Lukas Huber under the guidance of the first author and final approval and initial set-up of the senior author. This work will be used to apply for the Medical Doctor degree of Lukas Huber (dissertation at the University of Basel, Switzerland).
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Egloff, C., Huber, L., Wurm, M. et al. No added value using SPECT/CT to analyze persistent symptoms after anterior cruciate ligament reconstruction. Arch Orthop Trauma Surg 139, 807–816 (2019). https://doi.org/10.1007/s00402-019-03117-7
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DOI: https://doi.org/10.1007/s00402-019-03117-7