How Accurate Is <scp>CBCT</scp> in Measuring Bone Density? A Comparative <scp>CBCT‐CT</scp> In Vitro Study

Cassetta, Michele; Stefanelli, Luigi Vito; Pacifici, Andrea; Pacifici, L; Barbato, Ersilia

doi:10.1111/cid.12027

Cited by 114 publications

(91 citation statements)

References 14 publications

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“…Other studies have suggested an application of the conversion ratio to CT numbers in order to calculate the bone density using CBCT 16. Our data emphasize the complex influences of anatomic location, FOV, and different CBCT units on CT numbers.…”

Section: Discussionmentioning

confidence: 51%

Assessment of CT numbers in limited and medium field-of-view scans taken using Accuitomo 170 and Veraviewepocs 3De cone-beam computed tomography scanners

et al. 2014

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PurposeTo assess the influence of anatomic location on the relationship between computed tomography (CT) number and X-ray attenuation in limited and medium field-of-view (FOV) scans.Materials and MethodsTubes containing solutions with different concentrations of K2HPO4 were placed in the tooth sockets of a human head phantom. Cone-beam computed tomography (CBCT) scans were acquired, and CT numbers of the K2HPO4 solutions were measured. The relationship between CT number and K2HPO4 concentration was examined by linear regression analyses. Then, the variation in CT number according to anatomic location was examined.ResultsThe relationship between K2HPO4 concentration and CT number was strongly linear. The slopes of the linear regressions for the limited FOVs were almost 2-fold lower than those for the medium FOVs. The absolute CT number differed between imaging protocols and anatomic locations.ConclusionThere is a strong linear relationship between X-ray attenuation and CT number. The specific imaging protocol and anatomic location of the object strongly influence this relationship.

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Section: Discussionmentioning

confidence: 51%

Assessment of CT numbers in limited and medium field-of-view scans taken using Accuitomo 170 and Veraviewepocs 3De cone-beam computed tomography scanners

et al. 2014

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“…According to their results, gray density of CBCT is higher than in CT. However, there is an excellent correlation between CT and CBCT (3). There are similar studies consistent with our findings, which demonstrated positive correlation.…”

Section: Discussionmentioning

confidence: 99%

“…It is obvious that conventional dental imaging procedures and systems have limited capability for preoperative planning and implant surgeries (2). The quality, quantity, and density of the jaw are important factors in implant treatment (3). Besides, mechanical characteristics are an important factor in Osseo integration and primary stability of the implant (4–8).…”

Section: Introductionmentioning

confidence: 99%

Accuracy of densitometry of two cone beam computed tomography equipment in comparison with computed tomography

et al. 2017

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BackgroundThe use of oral implants has been growing, and cone beam computerized tomography (CBCT) has become the method of choice for oral and maxillofacial radiology.ObjectiveTo assess the accuracy of bone densitometry in two different CBCT devices in comparison with MDCT (multi-detector CT).MethodsDifferent concentrations of urografin, including 2.5%, 5%, 7.5%, 10%, 12.5%, were prepared, and the Hounsfield unit of these solution was measured by two CBCT devices (SORDEX CRANEX 3D and NEWTOM 5G) and one spiral CT device (SOMATOM SENSATION). Difference of output Hounsfield units in each concentration was compared in three devices. Correlation of devices with increase of urografin dose also was evaluated. Statistical analyses of the data were performed using SPSS18 and Kruskal–Wallis and Mann–Whitney U tests, along with Spearman’s correlation coefficient.ResultsThe range of gray density for NEWTOM 5G CBCT, SORDEX 3D CBCT, and SOMATOM CT imaging systems was from 781 to 2311, 427 to 1464, and 222 to 994, respectively. There was significant difference between devices in the Hounsfield unit in all urografin concentrations (p<0.001). Also there was a significant correlation between three devices with increasing the urografin dose (p<0.05; r>0.95)ConclusionOur findings indicated a high correlation and linear relationship between different studied imaging systems. Although utilizing CBCT in the assessment of bone density is useful according to its lower emitted dose and less cost, clinicians should be aware of the issue that the voxel value in CBCT is not as perfect as CT.

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“…CBCT, 19,20 CT and panoramic radiography are traditionally used in oral and maxillofacial surgery; 21,22 during the post-operative period, these imaging methods can delineate deformity of the mandibular canal bone structure, but the morphologic changes of the IAN cannot be evaluated. Several studies demonstrated that MRI can provide highly detailed anatomical information with excellent discrimination of the soft tissues, avoiding patient's exposure to X-rays.…”

Section: Discussionmentioning

confidence: 99%

3.0 Tesla MRI in the early evaluation of inferior alveolar nerve neurological complications after mandibular third molar extraction: a prospective study

Cassetta¹,

Barchetti

Sorrentino

et al. 2014

Dentomaxillofacial Radiology

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Objectives: To evaluate the use of 3.0 T MRI in the prognosis of inferior alveolar nerve (IAN) sensory disorders after mandibular third molar extraction, in the early post-operative period. Methods: 343 IANs were examined before and 3 days after surgery. Two radiologists evaluated the course of the nerve and the relative signal intensity (RSI). Cohen's kappa coefficient (k) and intraclass correlation coefficient (ICC) were used to evaluate the interobserver (k 5 0.891) and intra-observer variability (ICC 5 0.927; 0.914, respectively). The IANs were divided into four groups on the basis of neurosensory disorders recovery time. ANOVA was used to evaluate the differences among the RSIs of the four groups, and multiple comparisons were performed with Tukey's range test. Results: No differences in the course of IANs were found before and after surgery. In 280 IANs, no iatrogenic paraesthesia was found (Group A). 63 IANs showed a neurosensory impairment. 38 IANs showed recovery of post-operative paraesthesia at 3-month follow-up (Group B). 16 IANs showed a full recovery of iatrogenic paraesthesia at 6-month follow-up (Group C). Seven IANs displayed a full recovery at 12-month follow-up and two IANs showed persistence of neurosensory disorders at 18-month follow-up (Group D). The one-way ANOVA results indicated statistically significant difference among all groups (p , 0.05), except between Groups C and D (p 5 0.504). Conclusions: The early evaluation of RSI values represents a valid tool to determine the prognosis of IAN sensory disorders after mandibular third molar extraction.

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How Accurate Is CBCT in Measuring Bone Density? A Comparative CBCT‐CT In Vitro Study

Abstract: The lower radiation dose and reduced costs of CBCT make this a useful substitute for CT; however, this study has shown that, in order to more accurately define the bone density with CBCT, a conversion ratio needs to be applied to the VV.

Cited by 114 publications

References 14 publications

Assessment of CT numbers in limited and medium field-of-view scans taken using Accuitomo 170 and Veraviewepocs 3De cone-beam computed tomography scanners

Assessment of CT numbers in limited and medium field-of-view scans taken using Accuitomo 170 and Veraviewepocs 3De cone-beam computed tomography scanners

Accuracy of densitometry of two cone beam computed tomography equipment in comparison with computed tomography

3.0 Tesla MRI in the early evaluation of inferior alveolar nerve neurological complications after mandibular third molar extraction: a prospective study

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