Image segmentation is a very important topic in computer vision. However, due to the large variation of image content, fully automatic image segmentation for general applications is still an open problem. Therefore, our goal is to develop an interactive image segmentation tool that can accurately extract the desired object boundaries with minimal human efforts. In this paper, we propose a new t...

Consider two simple polygons with equal area. The Wallace–Bolyai–Gerwien theorem states that these polygons are scissors congruent, that is, they can be dissected into finitely many congruent polygonal pieces. We present an interactive application that visualizes this constructive proof. 1998 ACM Subject Classification I.3.5 [Computational Geometry and Object Modelling] Geometric Algorithms, la...

OBJECTIVE To compare the cost and performance of 2 types of laparoscopic instrumentation: reusable laparoscopic hook cautery instruments and curved scissors, or limited-reuse laparoscopic hook cautery instruments and curved scissors. DESIGN A randomized trial. SETTING The operating room of a tertiary care hospital. METHOD All general surgeons performing laparoscopic procedures at the hosp...

BACKGROUND Various methods have been described for tonsillectomy. Convincing evidence in the literature is still lacking regarding the optimal method of performing this surgical procedure. AIM To investigate the outcome of bipolar scissors tonsillectomy and compare it to bipolar diathermy forceps tonsillectomy. METHODS A prospective study of 91 patients was done at Cairo University Hospital...

The forces experienced while surgically cutting anatomical tissues from a sheep and two rats were investigated for three scissor types. Data were collected in situ using instrumented Mayo, Metzenbaum, and Iris scissors immediately after death to minimize post-mortem effects. The force-position relationship, the frequency components present in the signal, the significance of the cutting rate, as...