A protector is a software for protecting core technologies by using compression and encryption. Nowadays malwares use the protector to conceal the malicious code from the analysis. For detailed analysis of packed program, unpacking the protector is a necessary procedure. Lately, most studies focused on finding OEP to unpack the program. However, in this case, it would be difficult to analyze the program because of the limits to remove protecting functions by finding OEP. In this paper, we studied about the protecting functions in the Themida and propose an unpacking technique for it.
Magnetic resonance imaging offers better visualization for tumors present in the delicate parts of the human body. A pituitary tumor is one of the common types of brain-related tumors located underside the brain. It can be accessed through the nostrils and visualized better using magnetic resonance imaging (MRI). In this work, we present a 6-degree-of-freedom (DOF) robotic system for pituitary tumor resection via a transsphenoidal approach designed specifically for a commercially available 3T MRI scanner. The robotic system is designed to follow the anatomical and surgical constraints and to work inside the bore of the MRI to allow image acquisition during the surgical procedure. It has a 6-DOF manipulator consisting of a concentric tube and a tendon-driven bendable section. Both mechanisms are merged to have stiffness changing capability, and payload capacity to aid the surgical task. The manipulator is attached to a flexure shaft to bend it at the desired surgical angles. The materials used for development are analyzed in MRI and exhibit signal-noise ratio (SNR) reduction of less than 10%. The experimental results show that the stiffness can be changed more than ten times for safe navigation to the surgical site without damaging the surrounding tissues. Also, it can provide a maximum lifting force of more than 2N. The presented system is the preliminary version of the pituitary tumor resection system under development and shows the feasibility to be used in a real surgical environment.
Background: Master devices exclusively used for endoscopes with position control are being developed as an isomorphic form of endoscopes. These master devices are difficult to intuitively operate because the movement direction of the endoscopic image and control handle do not match.
Methods:To solve this problem, a master device was developed. Its movement direction is compatible with that of the endoscopic image. It analyzes image movements according to flexible endoscopic ureteroscope movements for each degree of freedom. A driving testbed experiment was conducted that modelled the internal structure of a kidney.
Results:The time taken in the experiment was shorter when using the proposed master device than the existing isomorphic master device. The proposed device yielded fewer mistakes.
Conclusions:It was confirmed the proposed device is effective in exclusive use for endoscopes because of its feasibility of position control and movement direction's coinciding with that of the endoscopic image.
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