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Multi-slice Spiral CT Measurements and Development Characteristics of Normal Ear Structures in Children

Author: WangQinXue
Tutor: YangGuiZuo
School: Shanxi Medical
Course: Human Anatomy and Embryology
Keywords: Multislice CT Normal Ear Child
CLC: R764
Type: Master's thesis
Year: 2011
Downloads: 28
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Abstract

OBJECTIVE: To measure children between 0-15 years of normal external ear, middle ear, inner ear anatomy data to explore our children normal temporal bone imaging features for clinical, teaching, research help. Materials and Methods: 96 cases were randomly selected from the Children's Hospital of Shanxi Province 0-15 years without ear disease first multi-slice spiral CT (multi-slice spiral computed tomography, MSCT) scan underwent the original image (multi-planar reconstruction planar reformation, MPR) measurement layers, and to measure the diameters of the main structure of the temporal bone at the level set to record the normal value. Statistical analysis of various parameters between age groups and gender groups. Results: (1) external ear: external auditory canal isthmus anteroposterior diameter of 3.58 ± 0.83mm. (2) middle ear: tympanic recess length of 4.18 ± 1.13mm; the tympanic crypt width 3.47 ± 0.82mmm; attic around the diameter of 6.90 ± 1.02mm; around the attic diameter 5.58 ± 0.88mm; drum sinus entrance width of 2.50 ± 0.57mmm; drum sinus depth of 10.60 ± 3.01mm; the tympanic sinus deep-diameter 3.19 ± 0.80mm. (3) the inner ear: the cochlea height of 3.63 ± 0.54mm; the cochlea base turn length of 6.15 ± 1.05mmm; cochlear basal turn width of 1.27 ± 0.28mm; vestibular vertical diameter of 5.43 ± 0.50mm; vestibular around diameter 2.86 ± 0.35mm; semicircular canal bone island width of 3.93 ± 0.52mm; the semicircular canal bone island width of 6.10 ± 0.63mmm; listen to the channel length of 6.53 ± 1.05mm; internal auditory canal diameter 5.76 ± 1.64mm; internal auditory channel width diameter 4.31 ± 0.83mm; the hole transverse diameter of the cochlear nerve 2.12 ± 0.51mm. (4) the facial nerve: the facial nerve fans sections of length 3.04 ± 0.68mm; facial nerve fans road section width of 0.88 ± 0.38mm; facial nerve tympanic segment length of 9.40 ± 3.15mm; facial nerve tympanic segment from the anvil bone short legs tip the shortest distance of 2.41 ± 0.79mm; facial nerve milk the sudden segment to the canal wall distance of 2.74 ± 0.63mm; mastoid segment of the facial nerve to the external ear door edge distance 14.6 ± 4.39mm: the facial nerve mastoid segment to the sigmoid sinus ditch anterior wall distance: 11.18 ± 1.55mmm. (5) mastoid: mastoid height of 22.49 ± 9.18mm; mastoid anteroposterior diameter measured as 18.96 ± 5.44mm; sigmoid sinus from the canal wall distance of 12.94 ± 1.71 mm, (6) the measurement data of each age group in both sexes. Tympanum on the crypt length about the attic diameter, the width of the entrance to the tympanic sinus, cochlear height, vestibular upper and lower diameter and around Trail, outside the half-width of the regulation of bone Island, on the half-width of the regulation of bone Island, cochlear nerve hole transverse diameter, facial nerve tympanic segment from the incus the shortest distance of the tip of the short legs, the mastoid segment of the facial nerve to the sigmoid sinus sulcus anterior wall distance indicators no significant differences among age groups. External auditory canal isthmus, tympanic sinus depth to diameter, length and width of cochlear basal turn, the internal auditory canal length, the internal auditory channel width diameter mastoid segment of the facial nerve canal wall or to the outer ear door edge distance in the 1-year-old development; tympanic crypt development after birth in width variations; attic anteroposterior diameter developed before age 5; drum Doufa Yu 1-5 years after birth; internal auditory canal diameter, the length of the width of the labyrinthine segment of the facial nerve, the tympanic segment of the facial nerve mastoid, sigmoid sinus to the canal wall distance after birth to 15 years old in the continuous development. Conclusions: (1) the bony external auditory canal from February after birth children begin; bony external auditory canal stenosis diagnostic criteria lt; 4mm does not apply to children under 6 years of age. (2) the structure of the inner ear, the cochlea, vestibule, semicircular canal bony structure is not age factors; (3) development of the outer ear, the middle ear most of the structure and internal auditory canal has its own age characteristics, suggesting that in the clinical diagnosis and surgery should take fully into account the age factor.

Multi-slice Spiral CT Measurements and Development Characteristics of Normal Ear Structures in Children

Abstract

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