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Paper Information

Journal:   IRANIAN JOURNAL OF RADIOLOGY   JULY 2016 , Volume 13 , Number 3; Page(s) 0 To 0.
 
Paper: 

EFFECT OF VOXEL SIZE ON DETECTION OF EXTERNAL ROOT RESORPTION DEFECTS USING CONE BEAM COMPUTED TOMOGRAPHY

 
 
Author(s):  NIKNESHAN SIMA, VALIZADEH SOLMAZ, JAVANMARD ANAHITA, ALIBAKHSHI LEILA*
 
* DEPARTMENT OF RADIOLOGY, SCHOOL OF DENTISTRY, SHAHID BEHESHTI UNIVERSITY OF MEDICAL SCIENCES, TEHRAN, IRAN.
 
Abstract: 

Background: Selecting a voxel size that yields minimal radiation dose with no significant compromise of the diagnostic accuracy of cone beam computed tomography (CBCT) is particularly important.
Objectives: This study aimed to assess the effect of voxel size on detection accuracy of simulated external root resorption defects using NewTom CBCT system.
Materials and Methods: In this diagnostic study, the roots of 90 extracted human central incisors were hypothetically divided into cervical, middle, and apical thirds. Variable-size defects were prepared in the buccal and lingual surfaces of the roots and CBCT scans were obtained with four different voxel sizes (150, 200, 250, and 300). Presence or absence of defects on CBCT scans was determined by three radiologists and the results were compared with the gold standard (actual size and depth of defects). Sensitivity and specificity values were calculated and reported for different groups.
Results: In the lingual surfaces, the highest specificity and sensitivity belonged to 300
mm voxel size (92.9%), and 200 and 250mm voxel sizes (both 97.4%) in the cervical third, respectively. In the middle third, the highest specificity and sensitivity belonged to 250 and 200mm voxel sizes (84.6% and 100%, respectively). In the apical third, the highest specificity and sensitivity belonged to 300mm voxel size (100% and 97.9%, respectively). In the buccal surfaces, the highest specificity and sensitivity belonged to 150 (75.0%), 300 and 250mm voxel sizes (100%) and the minimum values belonged to 200 mvoxel size (60% and 97.3%) in the cervical third. In the apical third, the highest specificity and sensitivity were noted in 300m  m voxel size (100% and 97.6%, respectively) and the minimum values were seen in 200 and 150mm voxel sizes (93.8%, 90.5%, respectively). In the middle third, 300, 250 and 200 mm voxel sizes yielded the highest specificity (88.9%), while 150mm voxel size yielded the highest sensitivity (98.8%).
Conclusion: Considering the similar diagnostic efficacy of all voxel sizes, 300
mm voxel size can be used with adequate efficacy for detection of external root resorption defects with minimal patient radiation dose and the shortest scanning time.

 
Keyword(s): ACCURACY, CONE-BEAM COMPUTED TOMOGRAPHY, ROOT RESORPTION
 
 
References: 
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Citations: 
 
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APA: Copy

NIKNESHAN, S., & VALIZADEH, S., & JAVANMARD, A., & ALIBAKHSHI, L. (2016). EFFECT OF VOXEL SIZE ON DETECTION OF EXTERNAL ROOT RESORPTION DEFECTS USING CONE BEAM COMPUTED TOMOGRAPHY. IRANIAN JOURNAL OF RADIOLOGY, 13(3), 0-0. https://www.sid.ir/en/journal/ViewPaper.aspx?id=569407



Vancouver: Copy

NIKNESHAN SIMA, VALIZADEH SOLMAZ, JAVANMARD ANAHITA, ALIBAKHSHI LEILA. EFFECT OF VOXEL SIZE ON DETECTION OF EXTERNAL ROOT RESORPTION DEFECTS USING CONE BEAM COMPUTED TOMOGRAPHY. IRANIAN JOURNAL OF RADIOLOGY. 2016 [cited 2021July26];13(3):0-0. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=569407



IEEE: Copy

NIKNESHAN, S., VALIZADEH, S., JAVANMARD, A., ALIBAKHSHI, L., 2016. EFFECT OF VOXEL SIZE ON DETECTION OF EXTERNAL ROOT RESORPTION DEFECTS USING CONE BEAM COMPUTED TOMOGRAPHY. IRANIAN JOURNAL OF RADIOLOGY, [online] 13(3), pp.0-0. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=569407.



 
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