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KMID : 1151820180120010039
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Journal of the Korean Society of Radiology
2018 Volume.12 No. 1 p.39 ~ p.46
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Study of Suitable Angle of Tibia-Foot and X-ray Tube for Navicular in Foot X-ray Examination
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Mun Ju-Wan
Han Jae-Bok
Choi Nam-Gil
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Abstract
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The purpose of this study was to determine suitable angle of Tibia-foot and the X-ray tube for scaphoid in foot X-ray examination. A total of twenty patients(mean age 32.12±years) are participated in this study. In the positions of Foot AP, internal and external oblique, tibia-foot angle was defined as 90° and 135°, and x-ray tube angle was defined as 0°, 5°, 10°, 15° and 20° respectively. The image quality was evaluated with blind test yielding scores ranging from 0 to 5 by the evaluation team consisted of 2 radiogical technologists, 2 radiologists, and 2 orthopedic surgeons. In case of Foot AP position, the degree of overlap between cuneiform and navicular was 3% and the blind test result was 4.89 at tibia-foot angle of 90° and 15° X-ray tube angle. When the tibia-foot angle is 135°, the degree of overlap was 5%, also the blind test result was 4.30 at 15° X-ray tube angle. The degree of overlap and blind test result were 30% and 3.75 respectively at 0° X-ray tube angle. In case of internal oblique position, at tibia-foot angle of 90° and 0° X-ray tube angle, the degree of overlap was 4% and the blind test result was 4.70. The 5% overlapping and highest score as 4.55 were obtained on tibia-foot angle of 135° and 0° X-ray tube angle. In case of external oblique position, at tibia-foot angle of 90° and 15° X-ray tube angle, the degree of overlap was 4% and the blind test score was 4.85. The 5% overlapping and highest score as 4.75 were obtained on tibia-foot angle of 135° and 15° X-ray tube angle. In conclusion, we confirmed suitable angle of tibia-foot and X-ray tube for scaph46oid in foot X-ray examination in this study. These findings will be helpful for us to reading for navicular fracture.
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KEYWORD
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Foot X-ray examination, Navicular fracture, X-ray tube angle
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