Cone Beam vs MDCT for Diagnosis and Pre-operative Evaluation of Otosclerosis (CONBEAM OTO)

University Hospital of Bordeaux

Status

Terminated

Conditions

Otosclerosis

Treatments

Device: Cone Beam CT

Study type

Interventional

Funder types

Other

Identifiers

NCT05214053

CHUBX 2021/21

Details and patient eligibility

About

This study aims to compare the Cone Beam and the multi-detector computed tomography for diagnosis and pre-operative evaluation of otosclerosis in patients addressed for conductive hearing loss with intact tympanic membrane. The study aims to show that the Cone Beam offers equivalent performances with lower radiation dosage in this indication

Full description

Otosclerosis is an inflammatory bone remodeling disorder of the otic capsule, characterized by spongiotic new bone formation, causing stamped ankylosis that can result in conductive hearing loss. Until now, the gold standard imaging technique for diagnosis and pre-operative evaluation of otosclerosis has been multi-detector computed tomography (MDCT). Cone Beam computed tomography is a relatively recent imaging modality. It is associated with a lower radiation dosage compared to MDCT, and a high spatial resolution that allows a more precise analysis of bone structures. During the last 15 years, its use has been increasingly common in odontology and craniofacial surgery. Several studies have already studied the utility of Cone Beam for temporal bone pathologies, including recent retrospective studies that showed satisfying diagnostic performances for otosclerosis. Up to now, very few prospective studies have compared those two imaging modalities for otosclerosis diagnosis and pre-operative evaluation.

Therefore, those two exams will be performed in patients addressed to the hospital for conductive hearing loss with intact tympanic membrane. Thus, the performance of Cone Beam will be compared to MDCT, regarding the positive diagnosis of otosclerosis, the analysis of anatomical structures of the temporal bone for pre-operative evaluation, and also the benefits in terms of irradiation. The MDCTs will include fewer slices than routine MDCTs and will be centered on the area of interest, in order to keep a total radiation dosage smaller or equivalent to routine care

Enrollment

1 patient

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Adult patients (18 years and older)
Requiring radiological assessment for conductive hearing loss with intact tympanic membrane, confirmed by otoscopy and audiogram
Signed informed consent
Affiliated or beneficiary of health insurance

Exclusion criteria

Absence of otosclerosis on the MDCT
History of middle ear surgery
Pregnancy, breast feeding women and women who are of childbearing age and not practicing adequate birth control
Patient under legal protection