多图像分析的客观评价方法对全景摄影技术的改进

IF 0.7 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Satoshi Imajo, Yoshinori Tanabe, Nobue Nakamura, Mitsugi Honda, M. Kuroda
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引用次数: 0

摘要

摘要导论在射线全景成像质量的标准化中,对初学者进行射线全景成像的教育和培训是非常重要的。我们评估了定位误差因素与可重复性全景射线摄影多图像分析结果之间的关系。材料与方法采用全景放射成像系统和牙体假体,在水平方向的法兰克福平面、左右方向的中矢状面和前后方向的犬齿上获取参考图像。在法兰克福平面上沿前后方向移动1-5 mm,沿水平(下巴高/低倾斜)和垂直(左右倾斜)方向旋转2-10°,获得定位误差图像。比较和评价了参考图像与定位误差图像的遮挡全等平面轮廓的互相关系数和角度差、峰值信噪比(PSNR)和变形矢量值。结果颌面轮廓的相关系数在下颌尖高位置变化最大,在旋转6°后呈负相关(r = - 0.29)。随着定位误差的增加,角度差有明显的变化趋势,10°下巴倾斜低像的角度差为8.9°。PSNR仅在后退1 mm的图像上大于30 dB。对于变形向量值,垂直旋转引起的定位误差最大。结论多幅图像分析可以确定导致全景x线摄影定位误差的因素,并可以进行误差校正。本研究以影像影像为基础,可协助初学者进行全景影像教育。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Objective evaluation method using multiple image analyses for panoramic radiography improvement
Abstract Introduction In the standardization of panoramic radiography quality, the education and training of beginners on panoramic radiographic imaging are important. We evaluated the relationship between positioning error factors and multiple image analysis results for reproducible panoramic radiography. Material and methods Using a panoramic radiography system and a dental phantom, reference images were acquired on the Frankfurt plane along the horizontal direction, midsagittal plane along the left–right direction, and for the canine on the forward–backward plane. Images with positioning errors were acquired with 1–5 mm shifts along the forward– backward direction and 2–10° rotations along the horizontal (chin tipped high/low) and vertical (left–right side tilt) directions on the Frankfurt plane. The cross-correlation coefficient and angle difference of the occlusion congruent plane profile between the reference and positioning error images, peak signal-to-noise ratio (PSNR), and deformation vector value by deformable image registration were compared and evaluated. Results The cross-correlation coefficients of the occlusal plane profiles showed the greatest change in the chin tipped high images and became negatively correlated from 6° image rotation (r = −0.29). The angle difference tended to shift substantially with increasing positioning error, with an angle difference of 8.9° for the 10° chin tipped low image. The PSNR was above 30 dB only for images with a 1-mm backward shift. The positioning error owing to the vertical rotation was the largest for the deformation vector value. Conclusions Multiple image analyses allow to determine factors contributing to positioning errors in panoramic radiography and may enable error correction. This study based on phantom imaging can support the education of beginners regarding panoramic radiography.
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来源期刊
Polish Journal of Medical Physics and Engineering
Polish Journal of Medical Physics and Engineering RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-
CiteScore
1.30
自引率
0.00%
发文量
19
期刊介绍: Polish Journal of Medical Physics and Engineering (PJMPE) (Online ISSN: 1898-0309; Print ISSN: 1425-4689) is an official publication of the Polish Society of Medical Physics. It is a peer-reviewed, open access scientific journal with no publication fees. The issues are published quarterly online. The Journal publishes original contribution in medical physics and biomedical engineering.
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