Analysis of the fossa olfactoria using cone beam tomography (CBT)

Güldner, Christian; Diogo, Isabell; Windfuhr, Jochen P.; Bien, Siegfried; Teymoortash, Afshin; Werner, Jochen A.; Bremke, Martin

doi:10.3109/00016489.2010.506653

Cited by 40 publications

(48 citation statements)

References 16 publications

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“…Recently, Dahmani-Causse et al assessed the accuracy of MDCT and CBCT for the measurement of footplate thickness [3]; CBCT was associated with more accurate histological measures and theoretical values. Guldner et al defined dehiscence of the bony canal of the internal carotid artery as a bone defect [0.3 mm [7]; the variation rate was 2.7 % in their study of 580 preoperative CBCT scans, which accords with previous MDCT data [4,14] (Table 4).…”

Section: Discussionsupporting

confidence: 73%

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Morphological concordance between CBCT and MDCT: a paranasal sinus-imaging anatomical study

et al. 2015

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Section: Discussionsupporting

confidence: 73%

“…bone is excellent (allowing for detailed study of the anatomy and ventilation air cavities) has been demonstrated previously [2,7]. In CBCT systems, the X-ray beam forms a conical geometry between the source and the detectors; in addition, digital flat-panel detectors replace the row(s) of detectors in conventional CT or MDCT.…”

mentioning

confidence: 94%

Morphological concordance between CBCT and MDCT: a paranasal sinus-imaging anatomical study

et al. 2015

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“…The accuracy of CBCT has been approved for the assessment of the anterior skull base, olfactory tract, upper airway, and paranasal sinuses [26,27,28]. The overall rate of pathologic findings in maxillary sinus detected by CBCT scanning was reported to be 56.3% by Ritter et al [29], with mucosal thickening being the most frequent pathology (38.1%), followed by partial calcification, opacification, and polypoidal mucosal thickening.…”

Section: Discussionmentioning

confidence: 99%

Diagnostic Accuracy of Cone-Beam Computed Tomography in the Evaluation of Chronic Rhinosinusitis

Zojaji¹,

Naghibzadeh²,

Baf

et al. 2015

ORL

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Introduction: This study assessed the agreement of cone-beam computed tomography (CBCT) scan and sinus endoscopy findings and attempted to find a diagnostic accuracy of CBCT in patients with chronic rhinosinusitis (CRS). Methods: Forty-two patients with CRS referred to the Aria and 22 Bahman Hospitals in Mashhad, Iran, during the year 2011 were included in this cross-sectional study. Paranasal sinus CBCT scanning and endoscopy were performed in all patients. The sensitivity, specificity, positive and negative predictive values (PPV and NPV), and accuracy of CBCT were determined, and the agreement between CBCT and endoscopy findings was evaluated. Results: In most of our findings, except for infundibulum thickening, there was a strong agreement between CBCT and paranasal sinus endoscopy, with a kappa coefficient >0.80 (p < 0.05). The sensitivity, specificity, PPV, NPV, and accuracy of CBCT were >80% for most of the findings, except for infundibulum thickening and septal deviation. Conclusion: CBCT has nearly the same diagnostic accuracy as sinus endoscopy. The accuracy of CBCT scanning is high, and CBCT findings are well correlated with sinus endoscopy findings. Considering its high accuracy and lower costs and radiation doses, CBCT may be a proper alternative method for diagnostic sinus endoscopy in the assessment of CRS in patients with a contraindication for sinus endoscopy.

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“…The possibility of detecting anatomic variations could already be shown in the paranasal sinuses and temporal bone [3][4][5]. The actual role of the CBT as a diagnostic tool in ENT surgery is until now not completely established.…”

Section: Introductionmentioning

confidence: 97%

Artifacts of the electrode in cochlea implantation and limits in analysis of deep insertion in cone beam tomography (CBT)

Güldner¹,

Wiegand²,

Weiß³

et al. 2011

Eur Arch Otorhinolaryngol

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Until now more than 250,000 cochlea implantations have been performed worldwide. The surgical procedure is well standardized. A discussion about the kind of postoperative radiological control has started since cone beam tomography (CBT) has been established in ENT and hearing preservation operations have come more into the focus. Further research has been concentrated on the role of CBT and the insertion of the basal turn. The aim of this study was to look for the possibilities of CBT and deep insertion. The second aim was to analyze the artifacts of cochlea implants in CBT. Three human cadaver ears were implanted with a flex soft electrode of MedEl© in a standard operation procedure with round window insertion and a full insertion. Afterwards 72 CBT sets per ear were performed with different X-ray-tube currents (2-10 mA), voltages (72-90 kV), and exposure times (9 and 17 s). On each data set, the radiological diameter of the electrode 9 (basal), electrode 2 (apical), the diameter of the cable next to the electrodes 9 and 2, and the associated diameter of the cochlea next to the electrodes 9 and 2 were evaluated. Additionally, a comparison to the real diameter was done. The mean radiological diameters of the measure point at electrode 9 were: electrode = 1.19 mm; cable = 0.65 mm; cochlea = 1.77 mm. Results for measure point at electrode 2 were: electrode = 0.98 mm; cable = 0.48 mm; cochlea = 1.21 mm. The real diameters were at electrode 9 in lateral view 0.58 mm and in top view 0.63 mm and at electrode 2 in lateral view 0.36 mm and in top view 0.50 mm. Differences between the diameters of the electrode 9 and 2 were highly significant. Interestingly, the real diameter of the electrode is half in comparison to the radiological one. Also in comparison to the diameter of the cable and the associated electrode is nearly half. Nearly 50% artifact exists on radiologic evaluation of the diameter of the electrode. Varying the X-ray adjustments did not lead to optimized results. The difficulties in evaluating a cochlea electrode with CBT could be shown. The high rate of artifacts (50%) makes it extremely difficult to predict the inserted scale, especially when evaluating the intracochlear position in the medial and apical turn of the cochlea. In conclusion, until now CBT allows a relatively safe evaluation of the electrode in the basal turn, whereas in deep insertion it is not really a useful tool to answer the question of insertion trauma, implanted scale, or scale displacements.

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Analysis of the fossa olfactoria using cone beam tomography (CBT)

Cited by 40 publications

References 16 publications

Morphological concordance between CBCT and MDCT: a paranasal sinus-imaging anatomical study

Morphological concordance between CBCT and MDCT: a paranasal sinus-imaging anatomical study

Diagnostic Accuracy of Cone-Beam Computed Tomography in the Evaluation of Chronic Rhinosinusitis

Artifacts of the electrode in cochlea implantation and limits in analysis of deep insertion in cone beam tomography (CBT)

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