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Influence of patient-specific anatomy on medical computed tomography and risk evaluation of minimally invasive surgery at the otobasis.
- Source :
-
European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery [Eur Arch Otorhinolaryngol] 2019 Feb; Vol. 276 (2), pp. 375-382. Date of Electronic Publication: 2018 Dec 15. - Publication Year :
- 2019
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Abstract
- Purpose: With the increasing use of new minimally invasive approaches in temporal bone surgery, the need arises for evaluation of the risk of injury to sensitive anatomical structures. The factors that influence the measurement uncertainty (variation in representation of position and shape of anatomical structures) of imaging are of relevance. We investigate the effect of patients' anatomy on the measurement uncertainty of medical CT.<br />Methods: Six formalin-fixed temporal bones were used, fiducial markers were bone-implanted, and 20 CT scans of each temporal bone were generated. Surgically threatened anatomical structures of importance were defined. Manual segmentation was performed to create 3D surface models, and different Gaussian filters were applied. Analysis points were established along the border of the superior semicircular canal to determine the deviation between the 3D images of the labyrinth. The standard uncertainty was calculated, and one-way analysis of variance was performed (significance level = 5%) to evaluate the effect of certain factors (patient, side, Gaussian filter) on the measurement uncertainty.<br />Results: The influence of patient-specific anatomy on the measurement uncertainty of medical CT (p = 0.049) was demonstrated for the first time. The applied Gaussian filter (p = 0.622) and the patient's side (p = 0.341) showed no significant effect.<br />Conclusion: The applied method and the results of the statistical analysis suggest that the patient's individual anatomical conditions affect the measurement uncertainty of medical CT. Thus, the patient's anatomy must be considered as an important influencing factor during risk evaluation concerning minimally invasive and image-guided surgery.
- Subjects :
- Cadaver
Fiducial Markers
Humans
Imaging, Three-Dimensional
Semicircular Canals anatomy & histology
Semicircular Canals diagnostic imaging
Surgery, Computer-Assisted
Vestibule, Labyrinth anatomy & histology
Vestibule, Labyrinth diagnostic imaging
Minimally Invasive Surgical Procedures
Patient Selection
Risk Assessment
Temporal Bone anatomy & histology
Temporal Bone diagnostic imaging
Tomography, X-Ray Computed
Subjects
Details
- Language :
- English
- ISSN :
- 1434-4726
- Volume :
- 276
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery
- Publication Type :
- Academic Journal
- Accession number :
- 30554360
- Full Text :
- https://doi.org/10.1007/s00405-018-5249-0