Comparative study of jaws with multislice computed tomography and cone-beam computed tomography

Carrafiello, Gianpaolo; Dizonno, Massimiliano; Colli, V.; Strocchi, Sabina; Taubert, A. Pozzi; Leonardi, Anna; Giorgianni, Andrea; Barresi, M.; Macchi, Aldo; Bracchi, Elena; Conte, L.; Fugazzola, Carlo

doi:10.1007/s11547-010-0520-5

Cited by 72 publications

(46 citation statements)

References 14 publications

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“…3,[33][34][35][36] To the best of our knowledge, only three studies 26,36,37 have been published so far using intact human heads to compare the performance of CBCT and MDCT in the dentomaxillofacial area. However, the focus has been laid predominantly on image quality, and not on accuracy of measurements.…”

Section: Discussionmentioning

confidence: 99%

Accuracy of linear intraoral measurements using cone beam CT and multidetector CT: a tale of two CTs

Patcas

Markic

Müller

et al. 2012

Dentomaxillofacial Radiology

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Objectives:The aim was to compare the accuracy of linear bone measurements of cone beam CT (CBCT) with multidetector CT (MDCT) and validate intraoral soft-tissue measurements in CBCT. Methods: Comparable views of CBCT and MDCT were obtained from eight intact cadaveric heads. The anatomical positions of the gingival margin and the buccal alveolar bone ridge were determined. Image measurements (CBCT/MDCT) were performed upon multiplanar reformatted data sets and compared with the anatomical measurements; the number of non-assessable sites (NASs) was evaluated. Results: Radiological measurements were accurate with a mean difference from anatomical measurements of 0.14 mm (CBCT) and 0.23 mm (MDCT). These differences were statistically not significant, but the limits of agreement for bone measurements were broader in MDCT (21.35 mm; 1.82 mm) than in CBCT (20.93 mm; 1.21 mm). The limits of agreement for softtissue measurements in CBCT were smaller (20.77 mm; 1.07 mm), indicating a slightly higher accuracy. More NASs occurred in MDCT (14.5%) than in CBCT (8.3%). Conclusions: CBCT is slightly more reliable for linear measurements than MDCT and less affected by metal artefacts. CBCT accuracy of linear intraoral soft-tissue measurements is similar to the accuracy of bone measurements.

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Section: Discussionmentioning

confidence: 99%

Accuracy of linear intraoral measurements using cone beam CT and multidetector CT: a tale of two CTs

Patcas

Markic

Müller

et al. 2012

Dentomaxillofacial Radiology

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“…Also, patient positioning in CBCT is easier than in conventional tomography. Although fan beam CT can provide similar radiographic outcomes as CBCT, 12 the radiation exposure to the patient from fan beam CT is higher than that from CBCT. [12][13][14][15] The accuracy of linear measurements obtained with CBCT for pre-operative planning of implant placement has been reported to be reliable in the posterior mandible.…”

Section: Introductionmentioning

confidence: 99%

“…Although fan beam CT can provide similar radiographic outcomes as CBCT, 12 the radiation exposure to the patient from fan beam CT is higher than that from CBCT. [12][13][14][15] The accuracy of linear measurements obtained with CBCT for pre-operative planning of implant placement has been reported to be reliable in the posterior mandible. 16,17 In spite of the high accuracy of the radiographic modality, the risk from ionizing radiation must be taken into account prior to prescribing patients to radiographic examination.…”

Section: Introductionmentioning

confidence: 99%

Effect of electric potential and current on mandibular linear measurements in cone beam CT

Panmekiate

Apinhasmit²,

Petersson³

2012

Dentomaxillofacial Radiology

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Objectives: The purpose of this study was to compare mandibular linear distances measured from cone beam CT (CBCT) images produced by different radiographic parameter settings (peak kilovoltage and milliampere value). Methods: 20 cadaver hemimandibles with edentulous ridges posterior to the mental foramen were embedded in clear resin blocks and scanned by a CBCT machine (CB MercuRay TM ; Hitachi Medico Technology Corp., Chiba-ken, Japan). The radiographic parameters comprised four peak kilovoltage settings (60 kVp, 80 kVp, 100 kVp and 120 kVp) and two milliampere settings (10 mA and 15 mA). A 102.4 mm field of view was chosen. Each hemimandible was scanned 8 times with 8 different parameter combinations resulting in 160 CBCT data sets. On the cross-sectional images, six linear distances were measured. To assess the intraobserver variation, the 160 data sets were remeasured after 2 weeks. The measurement precision was calculated using Dahlberg's formula. With the same peak kilovoltage, the measurements yielded by different milliampere values were compared using the paired t-test. With the same milliampere value, the measurements yielded by different peak kilovoltage were compared using analysis of variance. A significant difference was considered when p , 0.05. Results: Measurement precision varied from 0.03 mm to 0.28 mm. No significant differences in the distances were found among the different radiographic parameter combinations. Conclusions: Based upon the specific machine in the present study, low peak kilovoltage and milliampere value might be used for linear measurements in the posterior mandible.

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“…In comparison to traditional medical computed tomography (CT) systems, dental CBCT units offer reduced effective radiation doses, shorter acquisition scan times, easier imaging, and lower costs [8][9][10]. Disadvantages associated with dental CBCT include scatter radiation, a limited dynamic range, minimal soft tissue detail, and beam hardening artifacts caused by dental care material and implants [11][12][13][14]. CBCT image quality is influenced by detector quality, imaging setting, voxel size, and hardware/ software characteristics [15].…”

Section: Introductionmentioning

confidence: 99%

Accuracy of CBCT Measurements of a Human Skull

et al. 2010

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The purpose of this study is to assess the accuracy and reproducibility of cone-beam computed tomography (CBCT) measurements of a human dry skull by comparing them to direct digital caliper measurements. Heated gutta-percha was used to mark 13 specific distances on a human skull, and the distances were directly measured using a digital caliper and on CBCT images obtained with Iluma (3M Imtec, OK, USA) and 3D Accuitomo 170 (3D Accuitomo; J Morita Mfg. Corp., Kyoto, Japan) CBCT imaging systems. Iluma images were obtained at 120 kVp and 3.8 mA and reconstructed using voxel sizes of 0.2 and 0.3 mm 3 . Accuitomo images were obtained at 60 kVp and 2 mA and a voxel size of 0.250 mm 3 . In addition, 3-D reconstructions were produced from images obtained from both systems. All measurements were made independently by three trained observers and were repeated after an interval of 1 week. Agreement between observers and image type was assessed by calculating Pearson correlation coefficients, with a level of significance set at p<0.05. Pearson correlation coefficients between readings ranged from 0.995 to 1 for all image types. Correlations among observers were also very high, ranging from 0.992 to 1 for the first reading and from 0.992 to 1 for the second reading for the different image types. All CBCT image measurements were identical and highly correlated with digital caliper measurements. Accuracy of measurements of various distances on a human skull obtained from different CBCT units and image types is comparable to that of digital caliper measurements.

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Comparative study of jaws with multislice computed tomography and cone-beam computed tomography

Abstract: When panoramic radiography is not sufficient in the study of the teeth and jaw bones, CBCT can provide identical information to MSCT, with a considerable dose reduction. MSCT is, however, indicated when evaluation of soft tissue is required.

Cited by 72 publications

References 14 publications

Accuracy of linear intraoral measurements using cone beam CT and multidetector CT: a tale of two CTs

Accuracy of linear intraoral measurements using cone beam CT and multidetector CT: a tale of two CTs

Effect of electric potential and current on mandibular linear measurements in cone beam CT

Accuracy of CBCT Measurements of a Human Skull

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