全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
-  2018 

Study on Errors of Cephalographic Measurement Points | Insight Medical Publishing

DOI: 10.21767/2469-2980.100056

Full-Text   Cite this paper   Add to My Lib

Abstract:

For accurate diagnosis using CR cephalographic measurement points, it is very important to establish image processing conditions under which accurate measurement points can be input. We produced 2 types of CR cephalograms. Image enhancement was performed in one type and not performed in the other type. After establishing the same 20 measurement points, we indicated the error of the measurement points between the 2 types as an area of rejection ellipse, and evaluated measurement errors caused by differences in image processing conditions. From the data obtained, we produced a 95% rejection ellipse and evaluated measurement-point establishment errors from the mean value using vector quantities in 2 types. From regarding measurement points under both conditions, rejection ellipses of the measurement points of S, N, Or, U1, L1, G, Go, and Ar were comparatively small, and Ptm and Pns had narrow large rejection ellipses. The area of rejection ellipse was small at 12 of 20 measurement points on the image-processed cephalogram. It was revealed that input errors of many measurement points are low with frequency-processed cephalograms. In particular, because frequency processing can decrease the establishment errors of cephalometric measurement points, appropriate establishment of frequency processing should be performed.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133