Orbital Blowout Fracture With Globe Displacement Into the Maxillary Sinus: A Case Report and Literature Review.

Blunt trauma in the orbital region often results in fracture of 1 or more bone walls resulting in alteration of the orbital volume with the potential for visual sequelae. This study reports a rare case of displacement of the eyeball into the maxillary sinus after blunt trauma as well as its initial management, treatment, and clinical follow-up. Victims of eyeball displacement have a poor visual prognosis. Even if the patient has already been diagnosed with amaurosis on arrival to the hospital, all measures for rapid eye repositioning and reconstruction of the orbital cavity must be instituted, as well as appropriate clinical and pharmacologic management to avoid further complications.

CTdBem - A New Protocol for Ultra Low Radiation Dose MDCT.

This study describes a novel method of obtaining low-dose computed tomography (CT) scans followed by imaging postprocessing that provides diagnostic quality to such low-dose exams. In addition, we compared the Total Radiation Doses (DLP) of the 64-channel MDCT x 16-channel MDCT for a new Dental CT - CTdBem protocol for hospital use. DLP data obtained from 20 patients using 16-channel MDCT was compared with 20 other patients using 64-channel MDCT. In both tomographic (Aquilion 64 and Brightspeed 16) FOV was approximately 160(V) x 130(H) mm. An imaging postprocessing algorithm was used to provide diagnostic quality to the obtained low-dose CT scans. Imaging postprocessing included imaging smoothing, multiplanar reconstruction (MPR), and volume rendering (VR), as well as surface rendering (SR) to allow three-dimensional printing of the desired scans. The average DLPs were of 28,5 mGy.cm and 54,65 mGy.cm, using the 64-channel MDCT and 16-channel MDCT, respectively. The effective radiation dose (DLP) from the 64-channel MDCT statistically differs from the DLP data from 16-channel MDCT, resulting in a value of p < 0.05 for all comparisons. A novel low-dose CT protocol for dentomaxillofacial assessment using imaging postprocessing techniques is described. The authors concluded that although the DLP values differ statistically (p < 0.05), both equipment (64 and 16-channel MDCT) produce tomographic images of patients with low radiation doses. The greater the number of detectors, the lower the mAs product and, consequently, the amount of X-radiationproduced.