Abstract
Objective: To evaluate if digital compensation for exponential attenuation and the characteristics of the human visual system improves the diagnosis of approximal caries from digital radiographs. Material and methods: Forty premolar teeth were mounted in plaster blocks. Radiographs of the teeth were exposed with the Dixi digital intraoral system employing a Prostyle Intra dental X-ray unit (Planmeca Oy, Helsinki, Finland). Thirteen radiographs were then processed to compensate for the exponential attenuation and for the characteristic of the human visual system using equations presented in the paper. Ten observers were asked to diagnose approximal caries in all radiographs. ROC analyses were performed. The teeth were subsequently sectioned for histological validation of the lesions. The areas under ROC curves of original and processed radiographs were compared and analysed using Wilcoxon's signed-ranks test. Results: There were significant diagnostic differences between the two types of radiographs (all lesions P = 0.005, enamel P = 0.028, and dentine P = 0.050). Conclusion: Digital radiographs processed to compensate for exponential attenuation and the characteristics of the human visual system significantly improves the diagnosis of approximal caries in vitro.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 113-116 |
| Number of pages | 4 |
| Journal | Dentomaxillofacial Radiology |
| Volume | 31 |
| Issue number | 2 |
| DOIs | |
| State | Published - Mar 2002 |
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Keywords
- Dental caries, approximal
- Image processing, computer-assisted
- Radiography, dental
- Radiography, dental, digital
- ROC curve
ASJC Scopus subject areas
- Otorhinolaryngology
- Radiology Nuclear Medicine and imaging
- Dentistry(all)
- Radiological and Ultrasound Technology
Cite this
Detection of approximal caries in digital radiographs before and after correction for attenuation and visual response. An in vitro study. / Li, G.; Yoshiura, K.; Welander, U.; Shi, X. Q.; McDavid, W. D.
In: Dentomaxillofacial Radiology, Vol. 31, No. 2, 03.2002, p. 113-116.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Detection of approximal caries in digital radiographs before and after correction for attenuation and visual response. An in vitro study
AU - Li, G.
AU - Yoshiura, K.
AU - Welander, U.
AU - Shi, X. Q.
AU - McDavid, W. D.
PY - 2002/3
Y1 - 2002/3
N2 - Objective: To evaluate if digital compensation for exponential attenuation and the characteristics of the human visual system improves the diagnosis of approximal caries from digital radiographs. Material and methods: Forty premolar teeth were mounted in plaster blocks. Radiographs of the teeth were exposed with the Dixi digital intraoral system employing a Prostyle Intra dental X-ray unit (Planmeca Oy, Helsinki, Finland). Thirteen radiographs were then processed to compensate for the exponential attenuation and for the characteristic of the human visual system using equations presented in the paper. Ten observers were asked to diagnose approximal caries in all radiographs. ROC analyses were performed. The teeth were subsequently sectioned for histological validation of the lesions. The areas under ROC curves of original and processed radiographs were compared and analysed using Wilcoxon's signed-ranks test. Results: There were significant diagnostic differences between the two types of radiographs (all lesions P = 0.005, enamel P = 0.028, and dentine P = 0.050). Conclusion: Digital radiographs processed to compensate for exponential attenuation and the characteristics of the human visual system significantly improves the diagnosis of approximal caries in vitro.
AB - Objective: To evaluate if digital compensation for exponential attenuation and the characteristics of the human visual system improves the diagnosis of approximal caries from digital radiographs. Material and methods: Forty premolar teeth were mounted in plaster blocks. Radiographs of the teeth were exposed with the Dixi digital intraoral system employing a Prostyle Intra dental X-ray unit (Planmeca Oy, Helsinki, Finland). Thirteen radiographs were then processed to compensate for the exponential attenuation and for the characteristic of the human visual system using equations presented in the paper. Ten observers were asked to diagnose approximal caries in all radiographs. ROC analyses were performed. The teeth were subsequently sectioned for histological validation of the lesions. The areas under ROC curves of original and processed radiographs were compared and analysed using Wilcoxon's signed-ranks test. Results: There were significant diagnostic differences between the two types of radiographs (all lesions P = 0.005, enamel P = 0.028, and dentine P = 0.050). Conclusion: Digital radiographs processed to compensate for exponential attenuation and the characteristics of the human visual system significantly improves the diagnosis of approximal caries in vitro.
KW - Dental caries, approximal
KW - Image processing, computer-assisted
KW - Radiography, dental
KW - Radiography, dental, digital
KW - ROC curve
UR - http://www.scopus.com/inward/record.url?scp=0036491504&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036491504&partnerID=8YFLogxK
U2 - 10.1038/sj.dmfr.4600675
DO - 10.1038/sj.dmfr.4600675
M3 - Article
C2 - 12076051
AN - SCOPUS:0036491504
VL - 31
SP - 113
EP - 116
JO - Dentomaxillofacial Radiology
JF - Dentomaxillofacial Radiology
SN - 0250-832X
IS - 2
ER -