Msct Post-processing Techniques Findings Of Auditory Ossicle Chain In Otitis Media And Its Correlation With The Hearing Level

ObjectiveBy using multislice CT MPR,VR and MIP this three kinds of post-processing techniques to observe the morphological structure from the normal control group auditory ossicle chain,on the basis of three kinds of reconstruction technique to observe damage of ossicles in patients with otitis media.To observe the imaging diagnosis and surgical results of consistency,and to discuss the value of MSCT reconstruction technique. At the same time,to evaluate the correlation between the destruction of ossicles and listening level.Materials and Methodspatients with otitis media, sudden deafness,ear fistula after,and Meini ear's disease were performed temporal bone thin slice scan using 64 layer spiral CT scanner,According to the inclusion criteria from the client to choose a total of 63 cases of normal group and disease group.To transmit the data to ADW4.4 Workstation, the application software for 3 D reconstruction of auditory ossicle chain.These patients were from ENT of the first affiliated hospital of Bengbu Medical College,and ears are diseased patients and ruled out.The patient clinical signs and hearing were recorded in detail.Observation of the normal control group auditory ossicle chain structure.Pathological changes of ear auditory ossicle chain changes compared with the results in the operation.Results1.The caput malleita, collum malleita, manubrium mallei,ariticulus incudomallearis,corpus incudis, incus long process and incus short process in normal groups are well shown on MPR, VR and MIP, and there was no significant difference in display rate ,moreover, There was no significant difference among these three display methods when the lentiform papillae, incudostapedial joint and the caput stapedis were treated as a whole. There was no significant difference between MPR and MIP in posterior arch of stapes and inferior arch of stapes, and both of which superior to VR,and MPR has a advantage in display the stapedial footplate. Comparing with the VR and MI,MPR has a greater advantage in showing stapes.2.Compared the diagnosis results of caput malleita,manubrium mallei,incus long process and incus short process,and ariticulus incudomallearis in bone destruction group using the MSCT to that obtaining from operation results, the Kappa value was> 0.75,which indicated that the MSCT had good coherence to operation data, however, there was a poor coherence for stapesd and ariticulus incudostapedius,Kappa values were 0.538,0.529.3.In patients with otitis media, the incus would be the part the most vulnerable to damage.The degree of hearing loss and the degree of damage in the ossicular chain present the positive correlation(rs'=0.824, P<0.01). When the degree of bone destruction reach level of ?,the air conduction hearing loss is generally more than 62dB.Conclusions1.MSCT post-processing technique can display the majority of the microscopic structure of ossicular chain, especially MPR technique on the stapes footplate; VR technology is not suitable for the stapes display; MIP technology can show a three-dimensional effection,operate easily, simple and achieve a higher display performance, it is worth for the Radiologist using in the practice work.2.For patients with otitis media with soft tissue lesions in the tympanic cavity,comprehensive MSCT post-processing technique can accurately assess the destruction of ossicle and provide valuable information for clinicians.3.Anvil is more susceptible to damage, and the degree of destruction of the ossicular chain is closely related to hearing loss.