![]() The age of the DIAC patients ranged from 4 months to 80 years (4 males and 8 females) ( Table 1). Among these patients, patient 11 had been previously reported ( 24). Among these, 12 patients (13 ears) were diagnosed with DIACs according to the following morphological criteria, based on HRCT images: 1) the IAC was divided into 2 or 3 canals by a complete or incomplete bony septum 2) the duplicated canals were connected to the FN canal or the vestibule and the cochlea. The ear HRCT images of 64813 SNHL patients diagnosed from August 2009 to November 2017 were retrieved from a picture archiving and communication system in our institution by an experienced otoradiologist. The purpose of this study was to summarize the imaging features of these ears on high-resolution CT (HRCT) and HRMRI. Therefore, we retrospectively analyzed the imaging data of 12 DIAC patients (13 ears) admitted to our institution over the past 8 years. A preoperative understanding of the accompanying temporal bone anomalies, such as outer, middle, and inner ear malformation and facial nerve (FN) canal migration, is considerably useful for otologists to be able to design appropriate operative approaches for DIAC patients who are suitable for ECI ( 26). Hence, preoperative accurate diagnosis of DIAC through computed tomography (CT) and magnetic resonance imaging (MRI) is necessary to facilitate selection of the appropriate treatment. In comparison, in DIAC, these nerves usually appear aplastic thus, most of the patients do not achieve marked benefits from ECI ( 20, 24). Vestibulocochlear nerves (VCNs) or cochlear nerves (CNs) in stenotic IACs are usually dysplastic as such, most of the patients can undergo and benefit from electronic cochlear implantation (ECI) ( 21, 25). DIAC is frequently misdiagnosed as IAC stenosis in clinical practice because of lack of knowledge about its imaging features ( 9, 13, 21). Please make sure to notify your doctor, our scheduling department or your technician if you have any implanted medical device or metallic shrapnel in your body.A duplicated internal auditory canal (DIAC) is a rare subtype of internal auditory canal (IAC) anomalies and is usually associated with ipsilateral congenital sensorineural hearing loss (SNHL).Credit card and ATM card magnetic codes will be erased by the MRI’s magnetic field if brought into the room. We ask that patients do not enter the scanning room with jewelry, watches, keys, coins or other metal objects. Each patient is provided their own private locked dressing room which has an area to hang their clothing.While it is very rare to have an allergy to MRI contrast please tell your doctor, the scheduling department or you technician if you have previously had a problem with MRI contrast.Gadolinium is a natural element that enhances image quality.One of our certified MRI technologists or nursing staff will start an intravenous line to administer contrast prior to the examination. During the scan, you will hear faint hums and thumping. In addition, safety permitting, you may bring a companion into the room with you. ![]() You will be in constant contact with a caring technologist and have a control button to alert the technologist, if the need arises. The body part being studied will be located in the center of the MRI machine. The MRI will be performed on one of our high-strength GE 1.5/3.0T MRI scanners which provide the optimal image quality for this particular type of exam. MRI Internal Auditory Canal With and Without Contrast (Gadolinium)
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |