Role of CT Mastoids in the Diagnosis and Surgical Management of Chronic Inflammatory Ear Disease

Sudarshan, Ramachandran

doi:10.23880/ooaj-16000144

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“…Another striking observation that could be appreciated in the study was that the extent of the soft tissue in the middle and external ear cavity could be appreciated well in the CBCT scans, although the exact characterization of the soft tissue, as to whether it is cholesteatoma or granulation tissue or cerumen could not be carried out. Similar observation was made in HRCT by Sudarshan et al, who pointed out that HRCT is less sensitive in differentiating cholesteatoma from granulation tissue [18] . This is of clinical importance as CBCT offers less radiation dose to the patient and could be utilized in imaging with comparable diagnostic quality as HRCT.…”

Section: Discussionsupporting

confidence: 84%

Comparison of Ossicular Chain Status by Pre-Operative Cone Beam Computed Tomography (CBCT) with Intra-Operative Findings in Patients with Conductive Hearing Loss

NAIR

JOSE²,

KUMAR³

et al. 2024

Egyptian Journal of Ear, Nose, Throat and Allied Sciences

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Introduction: Maxillofacial radiology usually confines to the gnathic region and is restricted to the jurisdiction of stomatologists. Recently, the ability of CBCT in maxillofacial imaging other than the dentoalveolar structures has been elucidated, thereby expanding the purview to other areas of medical fraternity especially in the field of Otolaryngology. In contrast to the conventional CT, CBCT is an affordable imaging modality with high area specific resolution and low radiation dose, the properties which could be utilized for imaging of the ear ossicles Aim: To compare the ossicular chain status from pre-operative CBCT with intra-operative findings in patients with Conductive Hearing Loss (CHL). Patients and Methods: Between December 2015 and November 2017, a comparative study was conducted among thirty patients diagnosed with Conductive Hearing Loss (CHL). Preoperative Bilateral Ear CBCT scans were acquired using Kodak CS 9300 3D unit. The ossicular chain status from the CBCT scans was interpreted by two radiologists independently and the surgical findings were recorded by an otorhinolaryngologist. Statistical analysis used:The radio-surgical findings were tabulated and compared using Cohen's Kappa coefficient test. Results:The agreement between the observers was categorized into poor, moderate, good and excellent. A moderate to good radio-surgical agreement was obtained in the assessment of erosion of all the three ossicles and the ossicular joints. Relation between patient's results and types of graft used showed no statistically significant differences between them. Conclusion:Considering the advantages, CBCT can be considered as an exceptional substitute for CT in the diagnosis and postoperative follow-up examination of ear pathologies when evaluating bony components, especially in children.

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Section: Discussionsupporting

confidence: 84%