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Knudsen et al: Diagnosis of medial meniscal lesions in the canine stifle using multidetector computed tomographic positive-contrast arthrography
Veterinary Surgery 8, 2024

🔍 Key Findings

  • Multidetector CTA had high sensitivity (up to 100%) and specificity (up to 96%) for detecting medial meniscal tears in dogs.
  • Observer experience significantly influenced diagnostic accuracy, with more experienced observers showing higher agreement and better performance.
  • Training effect was evident, as less experienced observers improved between first and second readings.
  • Positive likelihood ratios ≥4.6 and negative likelihood ratios ≤0.08 were observed, suggesting CTA is clinically useful for confirming or ruling out meniscal injury.
  • CTA allowed identification of full and partial thickness lesions, with good visualization in sagittal, transverse, and frontal reconstructions.
  • Approximately 90% of menisci were correctly classified in second readings.
  • No adverse reactions were noted from the contrast injection; sedation was used instead of general anesthesia.
  • CTA was less invasive and potentially more cost-effective compared to arthroscopy, especially in settings without MRI access.

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← Articles

Knudsen et al: Diagnosis of medial meniscal lesions in the canine stifle using multidetector computed tomographic positive-contrast arthrography
Veterinary Surgery 8, 2024

🔍 Key Findings

  • Multidetector CTA had high sensitivity (up to 100%) and specificity (up to 96%) for detecting medial meniscal tears in dogs.
  • Observer experience significantly influenced diagnostic accuracy, with more experienced observers showing higher agreement and better performance.
  • Training effect was evident, as less experienced observers improved between first and second readings.
  • Positive likelihood ratios ≥4.6 and negative likelihood ratios ≤0.08 were observed, suggesting CTA is clinically useful for confirming or ruling out meniscal injury.
  • CTA allowed identification of full and partial thickness lesions, with good visualization in sagittal, transverse, and frontal reconstructions.
  • Approximately 90% of menisci were correctly classified in second readings.
  • No adverse reactions were noted from the contrast injection; sedation was used instead of general anesthesia.
  • CTA was less invasive and potentially more cost-effective compared to arthroscopy, especially in settings without MRI access.

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Multiple Choice Questions on this study

In Knudsen 2024 et al., on CTA diagnosis, what factor most significantly influenced diagnostic agreement and performance in CTA readings?

A. Patient size
B. Contrast volume
C. Observer experience
D. Stifle positioning
E. Scan timing

Answer: Observer experience

Explanation: Experience level affected both intra- and interobserver agreement.
In Knudsen 2024 et al., on CTA diagnosis, what was the maximum reported sensitivity of multidetector CTA for detecting meniscal lesions?

A. 62%
B. 72%
C. 90%
D. 93%
E. 100%

Answer: 100%

Explanation: Sensitivity reached 100% in second readings by some observers.
In Knudsen 2024 et al., on CTA diagnosis, which imaging plane combination was used for multiplanar reconstruction of the canine stifle?

A. Sagittal, axial, coronal
B. Oblique, dorsal, sagittal
C. Transverse, dorsal, sagittal
D. Frontal, transverse, oblique
E. Sagittal, coronal, axial

Answer: Transverse, dorsal, sagittal

Explanation: Multiplanar views included transverse, dorsal (frontal), and sagittal reconstructions.
In Knudsen 2024 et al., on CTA diagnosis, what was the approximate percentage of menisci correctly classified in second readings?

A. 70%
B. 75%
C. 80%
D. 90%
E. 95%

Answer: 90%

Explanation: Second readings yielded ~90% correct classification rate.
In Knudsen 2024 et al., on CTA diagnosis, what was the observed **negative likelihood ratio (NLR)** of CTA for meniscal lesion detection in second readings?

A. 0.45
B. 0.25
C. 0.15
D. 0.08
E. 0.01

Answer: 0.08

Explanation: A low NLR (≤0.1) suggests CTA is effective for ruling out lesions.

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