垂直双曝光全景放射摄影中的垂直放大校正

IF 1.9 4区 医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE
Hideaki Kimoto, Shoichi Asakura, Tatsuhiko Sasaki, Ko Dezawa, Toshihiko Amemiya, Kunihito Matsumoto, Yoshinori Arai
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引用次数: 0

摘要

目的:明确在进行垂直双曝光全景放射摄影时,门牙的倾斜程度和 X 射线焦点位置的抬高造成的放大误差,以及放大校正的验证效果:方法:在不同高度(0、5、10、15 和 20 毫米)和倾斜角度(0°、10°、20° 和 30°)下拍摄嵌入 26 个钢球的模型全景放射影像,以评估每种条件下的垂直放大率。计算了测量值和理论放大率之间的误差和相关系数:结果:钢球模型倾斜度越大,最上层钢球的图像横向拉伸越大。在垂直方向上,图像放大率也会影响切口区域物体的倾斜角度。垂直放大倍数的误差范围为-0.35-0.30%。测量放大率与理论放大率之间的斯皮尔曼等级相关系数为 0.983:在垂直双曝光全景放射摄影中合并全景X光片时,垂直放大校正有可能提高图像质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Vertical magnification correction in vertical dual-exposure panoramic radiography

Purpose: To clarify the magnification error caused by the degree of tilt of the incisor and the elevation of the X-ray focus position, and the verification effect of magnification correction when performing vertical dual-exposure panoramic radiography.

Methods: Panoramic radiographic images of a phantom embedding 26 steel balls were taken at different heights (0, 5, 10, 15, and 20 mm) and tilt angles (0°, 10°, 20°, and 30°) to evaluate vertical magnification in each condition. Error and correlation coefficients in the vertical magnifications were calculated between the measured and theoretical magnification values.

Results: The more the steel ball phantom was tilted, the more the images of the uppermost steel balls were laterally stretched. In the vertical direction, image magnification also influenced the tilt angle of the object in the incisal region. The range of error in vertical magnification was −0.35-0.30%. The Spearman’s rank correlation coefficient between the measured and theoretical magnification value was 0.983.

Conclusion: Vertical magnification correction has the potential to improve image quality when merging panoramic radiographs in vertical dual-exposure panoramic radiography.

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来源期刊
Journal of oral science
Journal of oral science DENTISTRY, ORAL SURGERY & MEDICINE-MATERIALS SCIENCE, BIOMATERIALS
CiteScore
3.80
自引率
0.00%
发文量
58
期刊介绍: Information not localized
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