 Good evening. I'll be presenting a study on a role of multi detector CT in temporal bone trauma introduction temporal bone fractures accounts for 30 to 70% of skull fractures in head trauma patients. The temporal bone has complex anatomy which contains critical structures like cranial nerves 56 seventh and eighth internal juggler bulb and inner ear structures high energy head trauma results in temporal bone fractures multi detector computer tomography plays a fundamental role in the initial evaluation of patients with poly trauma. Multi detector CT may help identify important structural injuries that may have devastating complications such as sensory neural hearing loss, conductive hearing loss, dizziness and balance dysfunction, perilymphatic fistulas, cerebrospinal fluid leaks, facial nerve paralysis and vascular injury. Multi detector CT helps in classifying temporal bone fractures and also predict trauma associated complications and guide treatment identifying injury to critical structures aims to demonstrate the role of multi detector CT in evaluating and classifying temporal bone fractures in patients with head trauma. Materials and methods a retrospective review of the institutional database was done between 2020 to 2021 and a total of 157 cases with clinical suspicion or diagnosis of temporal bone fractures following blunt head trauma, ear bleeding ear pain and poly trauma were analyzed. These patients were referred to department of radio diagnosis, NVJMC and research hospital for CT scan using G1 16 slice CT scanner. The agent gender distribution cause of injury radiological findings were evaluated. The fractures were classified according to the relation relationship of the fracture line with the long access of the petrus portion of the bone, violating or sparing of cortic capsule and petrus or non petrus factors. Results in this retrospective study of 157 patients, 50 patients were positive for temporal bone fractures, 45 were male and five were female patients. The most common cause being road traffic accident, which was seen in 39 patients accounting for 78% of the cases followed by cell fault which was seen in six of them accounting for 12% of cases and assault in five patients. The longitudinal fractures were seen in 27 cases accounting for 54%, transverse fractures were seen in 18 patients accounting for 36% and mixed fractures in five. OT capsule environment was seen in four out of 50 patients the petrus fractures were seen in 15 cases. Discussion temporal bone fractures occur from high energy trauma commonly seen in male gender and the age group and in motor vehicle accidents. The clinical science for temporal bone fractures include otalgia, otorrhea, otorhinorrhea and battle sign which is bruising of mastoid tip. The classification of temporal bone fractures is useful in the prediction of complications associated with the trauma, thus providing guidance for the management and treatment of the patient. The radiological science with such as temporal bone fracture include opacification of mastoid air cells or middle ear, air in the glenot cavity, nemosophilus near the temporal area, with high resolution CT temporal bone fracture line and its extension can be better designated. Ishman and Fred Land divides the temporal bone fractures into petrus and non-petrus types. Petrus fractures involve fracture of the OT capsule or the petrus apex. These fractures are more likely to cause vestibulococular injury, potential carotid injury, cerebrospinal fluid leak and facial nerve injury. Non-petrus fractures are again divided into middle ear category and mastoid category based on which anatomical structure is involved. Middle ear fractures have strong correlation with conductive hearing loss because of occipital chain disruption whereas mastoid ontic fractures have a much lower incidence of complications. A new nomenclature of OT capsule sparing and OT capsule violating has been suggested which was thought to correlate with radiological findings, complications and surgical planning better than the traditional classification of longitudinal transverse and oblique fractures. In case of OT capsule violating fractures, the fracture line pours through the inner ear structures like cochlea, semicircular kennels or vestibule contributing to increased incidence of complications. The ear are at all has proved in a study that patients with OT capsule violating fracture are more likely to develop complications like facial paralysis, cerebrospinal leak, hearing loss and intracranial complications than those with an OT capsule sparing fracture. Traditional classification of fractures like longitudinal transverse and oblique is important to mention in the report as it gives the treating physician a conceptual idea of the fracture pattern. However, it is important to mention even the OT capsule violating and OT capsule sparing terms in the term in the report as it gives a better idea about course of fracture line status of inner ear structures and possibility of associated complications. This is the actual brain section in the bone window. Here we can see that there is a linear fracture pushing through the master part of the right temporal bone and there is associated hemomastoid. And this is again an actual section of the brain bone window where we can see that there is a linear fracture line pushing through the master part of the right temporal bone and there is a suspicious transverse fracture forcing superiorly. And conclusion, a multi-detection CT, it is a non-invasive imaging and allows identification and classification of temporal bone fractures. Delineating fractures such as OT capsule violating sparing, pettus, non-pettus may be useful for predicting complications like sensory neural hearing loss, conductive hearing loss, facial nerve injury and vascular injury. And these are my references.