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

Martina Gerlane De Oliveira Pinto, Saulo L. Sousa Melo, Fernanda Clotilde Mariz Suassuna, Luiz Eduardo Marinho, José Bruno Da Silva Leite, Andre Ulisses Dantas Batista, Patrícia Meira Bento, Daniela Pita Melo

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number20200563
JournalDentomaxillofacial Radiology
Volume50
Issue number6
DOIs
StatePublished - Sep 1 2021

Keywords

  • Artefact
  • Cone-beam computed tomography
  • Metals
  • Sensitivity and specificity
  • Tooth fracture

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Radiology Nuclear Medicine and imaging
  • General Dentistry

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