Digital volume tomography (DVT) measurements of the olfactory cleft and olfactory fossa

Savvateeva, D. M.; Güldner, Christian; Murthum, Tobias; Bien, Siegfried; Teymoortash, Afshin; Werner, Jochen A.; Bremke, Martin

doi:10.3109/00016480903283741

Cited by 35 publications

(16 citation statements)

References 11 publications

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“…We noted few discrepancies, the majority of which were resolved following discussion. These [16]. In terms of the sinus cavities, our data are consistent with the previous studies indicating that CBCT is useful for the identification of dentomaxillofacial fine-bone structures, due to its excellent spatial resolution for high-contrast structures [16].…”

Section: Overall Concordance Between Mdct and Cbctsupporting

confidence: 93%

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

et al. 2015

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Section: Overall Concordance Between Mdct and Cbctsupporting

confidence: 93%

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

et al. 2015

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“…CBCT may become a useful alternative to CT scans. CBCT provides clear identification of anatomical structures and pathological findings [2,12,13]. Additionally, the advantages of analysis of the olfactory fossa by CBCT have been shown in adults [11].…”

Section: Discussionmentioning

confidence: 99%

Age-dependent differences of the anterior skull base

Güldner¹,

Zimmermann²,

Diogo³

et al. 2012

International Journal of Pediatric Otorhinolaryngology

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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: 98%

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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Digital volume tomography (DVT) measurements of the olfactory cleft and olfactory fossa

Cited by 35 publications

References 11 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

Age-dependent differences of the anterior skull base

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

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