OBJECTIVE: To assess the influence of anatomical location on computed tomography (CT) numbers in mid- and full field of view (FOV) cone beam computed tomography (CBCT) scans. STUDY DESIGN: Polypropylene tubes with varying concentrations of dipotassium hydrogen phosphate (K₂HPO₄) solutions (50-1200 mg/mL) were imaged within the incisor, premolar, and molar dental sockets of a human skull phantom. CBCT scans were acquired using the NewTom 3G and NewTom 5G units. The CT numbers of the K₂HPO₄ phantoms were measured, and the relationship between CT numbers and K₂HPO₄ concentration was examined. The measured CT numbers of the K₂HPO₄ phantoms were compared between anatomical sites. RESULTS: At all six anatomical locations, there was a strong linear relationship between CT numbers and K₂HPO₄ concentration (R(2)>0.93). However, the absolute CT numbers varied considerably with the anatomical location. CONCLUSION: The relationship between CT numbers and object density is not uniform through the dental arch on CBCT scans.
OBJECTIVE: To assess the influence of anatomical location on computed tomography (CT) numbers in mid- and full field of view (FOV) cone beam computed tomography (CBCT) scans. STUDY DESIGN:Polypropylene tubes with varying concentrations of dipotassium hydrogen phosphate (K₂HPO₄) solutions (50-1200 mg/mL) were imaged within the incisor, premolar, and molar dental sockets of a human skull phantom. CBCT scans were acquired using the NewTom 3G and NewTom 5G units. The CT numbers of the K₂HPO₄ phantoms were measured, and the relationship between CT numbers and K₂HPO₄ concentration was examined. The measured CT numbers of the K₂HPO₄ phantoms were compared between anatomical sites. RESULTS: At all six anatomical locations, there was a strong linear relationship between CT numbers and K₂HPO₄ concentration (R(2)>0.93). However, the absolute CT numbers varied considerably with the anatomical location. CONCLUSION: The relationship between CT numbers and object density is not uniform through the dental arch on CBCT scans.
Authors: Anne Caroline Oenning; Benjamin Salmon; Karla de Faria Vasconcelos; Laura Ferreira Pinheiro Nicolielo; Ivo Lambrichts; Gerard Sanderink; Ruben Pauwels; Reinhilde Jacobs Journal: Dentomaxillofac Radiol Date: 2018-01-10 Impact factor: 2.419
Authors: Matheus L Oliveira; Guilherme M Tosoni; David H Lindsey; Kristopher Mendoza; Sotirios Tetradis; Sanjay M Mallya Journal: Imaging Sci Dent Date: 2014-11-25
Authors: Priscila A Lopes; Gustavo M Santaella; Carlos Augusto S Lima; Karla de Faria Vasconcelos; Francisco C Groppo Journal: Dentomaxillofac Radiol Date: 2018-07-20 Impact factor: 2.419
Authors: Thiago O Gamba; Matheus L Oliveira; Isadora L Flores; Adriana D Cruz; Solange M Almeida; Francisco Haiter-Neto; Sérgio L P C Lopes Journal: Angle Orthod Date: 2013-08-07 Impact factor: 2.079