The raw data was processed by using axial, coronal and double oblique multi-planar reformation; Images obtained were graded in terms of quality with a 5-point scale(5=excellent, 4=good, 3=fair, 2=poor, and 1=nondiagnostic). In grading image quality at axial MPR, The radiologic specialists focused on the subarcuate fossa, tendon of tensor tympani, facial recess, vestibular aqueduct and pyramidal eminence, In grading image quality at coronal MPR, attention was given to the scute, crista transversa, fenestra cochleae, lateral malleal ligament and snake eyes signature of cranial nerve, In the grading of the image quality at double oblique MPR, the radiologic specialists concentrated on the malleus, incus, stirrup bone, upper bony semicircular and aquaeductus fallopii, and then to implement statistical analysis. In order to choose the minimum tube current values and the maximum pitch that can satisfy the diagnosis request, image quality of axial, coronal and double oblique reformation images was compared with different tube current groups. 15 ears of volunteers were used to test the validity with the scanning parameter. Subsequently noise, MTF and dose length product were measured by phantoms in different tube current and pitch, the parameters obtained were compared and taken into statistics analysis.

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The results are: 1 the stricture of the capillaries of stria vascularis was observed in most cochleae of rickety rats and, segmental deletions of the outer hair cells on the first turn of cochlea were found in a small number of rickety rats; 2 the perilymphatic ionized calcium concentration significantly re- duced and the threshold of CAP (Compound Action Poten- tials of the eighth nerve) significantly rose in rickety rats in comparison with those of normal control; 3 gentamicin results in an increase of the perilymphatic ionized calcium concentra- tion in rickety rats; 4 the cochleae of the rickety rats appeared to be less vulnerable to the ototoxicity of gentamicin than the normal one.

研究包括兩個(gè)方面，其一是&佝僂病的感覺神經(jīng)性耳聾及其對慶大霉素耳毒性作用的耐受性&美国一级黄片的黄色美国的现在能放出来的，系用大白鼠建立維生素D缺乏性佝僂病動(dòng)物模型国产精品久久久久精品三级专区，發(fā)現(xiàn)：（1）佝僂病大白鼠耳蝸血管紋毛細(xì)血管狹窄，少數(shù)動(dòng)物耳蝸底回外毛細(xì)胞有節(jié)段性缺失一级黄色视频免费下载观看真人视频；（2）佝僂病大白鼠的耳蝸鼓階外淋巴鈣離子濃度降低免费三级片欧美，CAP（聽神經(jīng)復(fù)合動(dòng)作電位，以下簡稱CAP）聽閾提高黄片一级午夜福；（3）慶大霉素可使佝僂病大白鼠耳蝸外淋巴鈣離子濃度上升一级a片性爱无码鲁鲁网；（4）佝僂病大白鼠耳蝸在功能和形態(tài)上都比正常者更能耐受慶大霉素的耳毒性損害。

Objective To investigate the distribution of NGF in the cochleae of guinea pigs and to explore the mechanism of NGF in the auditory path ways.

目的 觀察神經(jīng)生長因子(nerve growth factor第一视频欧美福利在线， NGF)在正常豚鼠耳蝸中的定位分布97超碰人妻，為進(jìn)一步研究其在聽覺通路中的作用機(jī)制提供依據(jù)。

The hearing thresholds were significantly increased in 10 out of 28 cochleae (35.7%) with CIEAg immunization.

對照組動(dòng)物僅在相應(yīng)時(shí)間及相同部位注射等量完全及不完全弗氏佐劑精品无码一区二区视频在线。

It is considered that the cochleae of rickety rats have higher tolerance to the ototoxicity of gentamicin as a result of impaired cochlear blood supply.

在研究佝僂病時(shí)耳蝸對氨基糖苷類抗生素的耐受性方面国产精品一区二区女厕，國內(nèi)外尚未見類似報(bào)道。

fenestra cochleae：蝸窗

內(nèi)側(cè)壁上有兩個(gè)小孔:上方的孔呈卵圓形,通向內(nèi)耳的前庭,稱前庭窗(fenestra vestibuli),被鐙骨底封閉;下方的孔為圓形,與耳蝸的起始部相接,稱蝸窗(fenestra cochleae),活體時(shí)被第二鼓膜封閉,此膜對耳蝸內(nèi)的外淋巴的波動(dòng)具有緩沖作用.

fenestra cochleae：圓窗

聽覺管 - Tuba auditiva | 圓窗 - Fenestra cochleae | 圓窗冠 - Crista fenestrae cochleae

fenestra cochleae：蝸牛窓;正円窓

蝸牛窓稜 - Crista fenestrae cochleae | 蝸牛窓;正円窓 - Fenestra cochleae | 蝸牛軸 - Modiolus cochleae

Modiolus cochleae：耳蝸軸

耳蝸管口 - Apertura canaliculi cochleae | 耳蝸軸 - Modiolus cochleae | 膝狀神經(jīng)節(jié) - Ganglion geniculi; Ganglion geniculatum

Modiolus cochleae：蝸牛軸

蝸牛窓;正円窓 - Fenestra cochleae | 蝸牛軸 - Modiolus cochleae | 蝸牛頂 - Cupula cochleae