发明名称 |
Method for quantifying caries |
摘要 |
A method for quantifying caries, executed at least in part on data processing hardware, the method comprising generating a digital image of a tooth, the image comprising intensity values for a region of pixels corresponding to the tooth, gum, and background; extracting a lesion area from sound tooth regions by identifying tooth regions, extracting suspicious lesion areas, and removing false positives; identifying an adjacent sound region that is adjacent to the extracted lesion area; reconstructing intensity values for tooth tissue within the lesion area according to values in the adjacent sound region; and quantifying the condition of the caries using the reconstructed intensity values and intensity values from the lesion area. |
申请公布号 |
US8768016(B2) |
申请公布日期 |
2014.07.01 |
申请号 |
US200912487729 |
申请日期 |
2009.06.19 |
申请人 |
Carestream Health, Inc. |
发明人 |
Pan Liangliang;Yan Jiayong;Wang Wei;Shi Lixing;Wong Victor C. |
分类号 |
G06K9/00 |
主分类号 |
G06K9/00 |
代理机构 |
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代理人 |
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主权项 |
1. A method for quantifying caries, executed at least in part on data processing hardware, the method comprising:
generating a digital image of a tooth, the image comprising intensity values for a region of pixels corresponding to the tooth, gum, and background; automatically extracting a lesion area from sound regions of a tooth by identifying tooth regions, extracting suspicious lesion areas, and removing false positives; identifying an adjacent sound region that is adjacent to the extracted lesion area; reconstructing intensity values for tooth tissue within the lesion area according to values in the adjacent sound region; and quantifying the condition of the caries using the reconstructed intensity values and intensity values from the lesion area; wherein identifying tooth regions comprises sub-steps of:
generating a first threshold image from a grayscale fluorescence image of the tooth by selecting intensity data values higher than a first predetermined threshold value c1;generating a second threshold image from a grayscale reflectance image of the tooth by selecting intensity data values higher than a second predetermined threshold value c2;generating a preliminary tooth regions image from the intersection of the first and second threshold images;generating a reference binary image from the grayscale fluorescence image by selecting intensity data values higher than a third predetermined threshold value c3, wherein threshold value c3 exceeds threshold value c1; andgenerating a refined tooth regions image from regions that are in the preliminary tooth regions image and are connected to objects in the reference binary image. |
地址 |
Rochester NY US |