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Influence of Radiographic Positioning on Canine Sacroiliac and Lumbosacral Angle Measurements
Susan Jones1, Mason Savage2, Brian Naughton3
1Department of Clinical Sciences, North Carolina State University College of Veterinary Medicine, Raleigh, North Carolina, United States.
Veterinary and Comparative Orthopaedics and Traumatology : V.C.O.T
|January 12, 2018
Summary
Radiographic malpositioning greater than 5° significantly decreases canine sacroiliac and lumbosacral inclination angles. Avoid centering lateral pelvic radiographs over the femur to ensure accurate measurements.
Area of Science:
- Veterinary Radiology
- Canine Anatomy
Background:
- Accurate radiographic measurements of canine sacroiliac and lumbosacral inclination angles are crucial for diagnosing spinal conditions.
- Radiographic malpositioning can introduce measurement errors, potentially leading to misdiagnosis.
Purpose of the Study:
- To investigate the impact of rotational malpositioning and varying focal points on canine sacroiliac and lumbosacral inclination angles.
- To establish guidelines for accurate radiographic positioning in veterinary spinal assessments.
Main Methods:
- Lateral pelvic radiographs were obtained from canine cadavers.
- Radiographic beam rotation (5°, 10°, 15°) simulated malpositioning.
- Focal points were varied over the abdomen and femur to assess positional influence.
Main Results:
- Rotational malpositioning exceeding 5° significantly reduced both sacroiliac and lumbosacral inclination angles.
- Centering radiographs over the femur, but not the abdomen, significantly decreased lumbosacral angle measurements.
- Minor rotational malpositioning (5°) did not affect angle measurements.
Conclusions:
- Pelvic rotation greater than 5° should be avoided during radiographic assessment of canine sacroiliac and lumbosacral angles.
- Lateral radiographs centered over the femur should not be used for these specific angle measurements.
- Adherence to precise radiographic positioning is essential for reliable diagnostic interpretation in veterinary orthopedics.
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