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Khojastepour, L, Mohammadzadeh, S, Jazayeri, M, Omidi, M. (1396). In vitro Evaluation of the Relationship between Gray Scales in Digital Intraoral Radiographs and Hounsfield Units in CT Scans. سامانه مدیریت نشریات علمی, 7(3), 289-298.
L Khojastepour; S Mohammadzadeh; M Jazayeri; M Omidi. "In vitro Evaluation of the Relationship between Gray Scales in Digital Intraoral Radiographs and Hounsfield Units in CT Scans". سامانه مدیریت نشریات علمی, 7, 3, 1396, 289-298.
Khojastepour, L, Mohammadzadeh, S, Jazayeri, M, Omidi, M. (1396). 'In vitro Evaluation of the Relationship between Gray Scales in Digital Intraoral Radiographs and Hounsfield Units in CT Scans', سامانه مدیریت نشریات علمی, 7(3), pp. 289-298.
Khojastepour, L, Mohammadzadeh, S, Jazayeri, M, Omidi, M. In vitro Evaluation of the Relationship between Gray Scales in Digital Intraoral Radiographs and Hounsfield Units in CT Scans. سامانه مدیریت نشریات علمی, 1396; 7(3): 289-298.

In vitro Evaluation of the Relationship between Gray Scales in Digital Intraoral Radiographs and Hounsfield Units in CT Scans

Journal of Biomedical Physics and Engineering
مقاله 10، دوره 7، شماره 3، آذر 2017، صفحه 289-298    اصل مقاله (512.79 K)
نوع مقاله: Original Research
نویسندگان
L Khojastepour1؛ S Mohammadzadeh2؛ M Jazayeri3؛ M Omidi* 4
1Professor of Oral and Maxillofacial Radiology (M.Sc.), Department of Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
2Specialist in Periodontology (M.Sc.), Department of Periodontics, School of Dentistry, Bushehr University of Medical Sciences, Bushehr, Iran
3Specialist in Oral and Maxillofacial Radiology (M.Sc.), Private Clinic of Oral and Maxillofacial Radiology, Khoramabad, Iran
4Assistant Professor of Oral and Maxillofacial Radiology (M.Sc), Department of Radiology, School of Dentistry, Shiraz University of Medical Sciences, International Branch, Shiraz, Iran
چکیده
Background: Jaw bone quality plays an essential role in treatment planning and prognosis of dental implants. Regarding several available methods for bone density measurements, they are not routinely used before implant surgery due to hard accessibility.
Objective: An in vitro investigation of correlation between average gray scale in direct digital radiographs and Hounsfield units in CT-Scan provides a feasible method for evaluating alveolar bone quality prior to implant surgery.
Methods: 26 sheep’s mandibles in which a square shape ROI marked by gutta percha, were prepared. Three direct digital radiographs (CCD sensor) from every specimen were taken using 80, 100 and 200 milli-seconds. Then, the average gray levels for ROIs were calculated using a costume-made software. Next, the specimens were scanned using a 16-slice spiral CT and the Hounsfield Unit of each ROI was calculated. Pearson analysis measured the correlation between Hounsfield units and average gray levels.
Results: There was a positive correlation between Hounsfield unit and average gray level in the radiographs and the correlation was better in higher exposure times.
Conclusion: It is possible to estimate Hounsfield unit and bone density in the jaw bones using average gray scale in a digital radiograph. This approach is easy, simple and available and also results in lower patient exposure comparing other bone densitometric analysis methods.
کلیدواژه‌ها
Hounsfield Units؛ Gray Level؛ Bone Density؛ Implant
مراجع
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