[Clinical features and scalp video electroencephalogram analysis of patients with insular epilepsy].

Objective: To explore the clinical and scalp video electroencephalographic(EEG) characteristics of insula lobe epilepsy identified by intracranial electrode, and to provide some references for early diagnosis and clinical evaluation in patients with insula lobe epilepsy. Methods: A total of 12 patients diagnosed with insula lobe epilepsy identified by intracranial electrode were included from Xuanwu Hospital of Capital Medical University from January 2013 to December 2015.Their clinical and EEG data were analyzed. Results: 91.7% of patients had sensory aura before seizure, and had clear consciousness at onset initial time.Visceral motor and visceral sensation were the most common symptoms, and the epilepsy was always ended with somatic movement.There was no prominent characteristic changes in scalp EEG. Conclusions: Clinical features are important for insula lobe epilepsy diagnosis.When patients present symtoms aforementioned, insula lobe epilepsy should be considered.

Tooth surface fitting and three-dimensional display using hidden surface removal technique.

Bi-cubic parametric spline surface is applied for surface-fitting of the external surface and canal of tooth based on its crown-to-root, cross-sectional data obtained by X-ray scanning. For three-dimensional display of the fitted surfaces, a technique for fast removal of the hidden surfaces is also reported. The selection of the accumulated chord length or coordinate component as parameter make it possible to fit any kind of surface smoothly. For displaying or plotting a well-fitted surface, a method capable of discriminating the grades for sequential removal of the hidden surfaces is developed for substantial reduction of computing time.