TY - JOUR
T1 - Influence of size of field of view (FOV), position within the FOV, and scanning mode on the detection of root fracture and observer’s perception of artifacts in CBCT images
AU - De Oliveira Pinto, Martina Gerlane
AU - Sousa Melo, Saulo L.
AU - Suassuna, Fernanda Clotilde Mariz
AU - Marinho, Luiz Eduardo
AU - Da Silva Leite, José Bruno
AU - Batista, Andre Ulisses Dantas
AU - Bento, Patrícia Meira
AU - Melo, Daniela Pita
N1 - Publisher Copyright:
© 2021 The Authors.
PY - 2021/9/1
Y1 - 2021/9/1
N2 - Objective: To assess the influence of field of view (FOV) size, scanning position within the FOV and scanning mode on the detection of root fracture and artifact perception. Methods: Forty single-rooted premolars restored with NiCr and AgPd posts were divided into two groups: fractured and sound. All teeth were scanned using four CBCT scanning protocols varying FOV sizes (80 × 80 mm and 50 × 55 mm) and scanning modes (Standard and High Definition). The sample was positioned within the FOV in two pre-set positions (central and lateral) and in four positions established by the operator (quadrants). Detection of root fracture and artifact perception were assessed by two observers using 5-point and 4-point scales. Sensitivity, specificity, accuracy, and AUC values were calculated and compared by ANOVA two-way and Tukey’s test. Chi-square and Fisher’s exact test were used to assess artifact perception. The level of significance was set at p < 0.05. Results: The central position within the FOV presented higher sensitivity, specificity, accuracy, and AUC values and differed from the lateral position within the FOV for the studied metal posts (p<0.05). Quadrant 2 presented the best sensitivity, accuracy, and AUC values (p<0.05). The lateral position within the FOV, AgPd posts, quadrants 1 and 3 and protocols 1 (SM, 80 × 80) and 2 (HD, 80× 80) presented higher frequency of artifacts classified as “severe”. Conclusion: Positioning the object in the center or closer to the anterior periphery of the FOV while using a small FOV improved the detection of root fracture and decreased artifact perception.
AB - Objective: To assess the influence of field of view (FOV) size, scanning position within the FOV and scanning mode on the detection of root fracture and artifact perception. Methods: Forty single-rooted premolars restored with NiCr and AgPd posts were divided into two groups: fractured and sound. All teeth were scanned using four CBCT scanning protocols varying FOV sizes (80 × 80 mm and 50 × 55 mm) and scanning modes (Standard and High Definition). The sample was positioned within the FOV in two pre-set positions (central and lateral) and in four positions established by the operator (quadrants). Detection of root fracture and artifact perception were assessed by two observers using 5-point and 4-point scales. Sensitivity, specificity, accuracy, and AUC values were calculated and compared by ANOVA two-way and Tukey’s test. Chi-square and Fisher’s exact test were used to assess artifact perception. The level of significance was set at p < 0.05. Results: The central position within the FOV presented higher sensitivity, specificity, accuracy, and AUC values and differed from the lateral position within the FOV for the studied metal posts (p<0.05). Quadrant 2 presented the best sensitivity, accuracy, and AUC values (p<0.05). The lateral position within the FOV, AgPd posts, quadrants 1 and 3 and protocols 1 (SM, 80 × 80) and 2 (HD, 80× 80) presented higher frequency of artifacts classified as “severe”. Conclusion: Positioning the object in the center or closer to the anterior periphery of the FOV while using a small FOV improved the detection of root fracture and decreased artifact perception.
KW - Artefact
KW - Cone-beam computed tomography
KW - Metals
KW - Sensitivity and specificity
KW - Tooth fracture
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U2 - 10.1259/dmfr.20200563
DO - 10.1259/dmfr.20200563
M3 - Article
C2 - 33565884
AN - SCOPUS:85113460886
SN - 0250-832X
VL - 50
JO - Dentomaxillofacial Radiology
JF - Dentomaxillofacial Radiology
IS - 6
M1 - 20200563
ER -