Real-time single frequency precise point positioning (PPP) is a promising technique for high-precision navigation with sub-meter or even centimeter-level accuracy because of its convenience and low cost. The navigation performance of single frequency PPP heavily depends on the real-time availability and quality of correction products for satellite orbits and satellite clocks. Satellite-based au...

This paper focuses on to identify the limits and insufficiencies in utilising Network Real-Time Kinematic Global Navigation Satellite Systems (NRTK GNSS) and its augmentation techniques in a precise positioning in a realtime navigation system related to visually impaired people. The purpose was to improve the positioning performance and ensure the availability of reliable and highly accurate po...

We developed and validated a pseudo-range correction (PRC) modeling system that can prevent degradation of positioning accuracy even in situations where one cannot obtain PRC messages for Differential Global Navigation Satellite System (DGNSS). A PRC modeling scheme was devised based on the repeat time of GNSS satellites and previously-collected PRC data. The difference between the modeled and ...

Introduction: The aim of this study was to determine the accuracy of two different immobilization methods in patient positioning in cranial radiotherapy. The six-dimensional (6D) target localization accuracy of using a dedicated stereotactic mask was compared with that of a conventional head mask by the ExacTrac system. Material and Methods: ...

STUDY OBJECTIVE To determine whether the timely correction of endotracheal tube (ETT) positioning prevents further inappropriate positions. DESIGN Prospective crossover study. SETTING University-affiliated hospital. PATIENTS 44 adult, ASA physical status 1, 2, and 3 patients undergoing open or laparoscopic abdominal procedures. INTERVENTIONS ETT positioning was verified by both ausculta...

abstract background: correction of severe kyphosis is a challenging operation in spinal surgery. a two stage operation has been commonly used: anterior release and decompression followed by posterior correction and fusion. we describe the posterior vertebral osteotomy technique for correction of severe and rigid kyphosis through posterior-only approach. methods: twelve patients (six male and si...

An approach to quantitatively determine patient surface contours as part of an augmented reality (AR) system for patient position and posture correction was developed. Quantitative evaluation of the accuracy of patient positioning and posture correction requires the knowledge of coordinates of the patient contour. The system developed uses the surface contours from the planning CT data as the r...

abnormal development of the urethral fold and ventral foreskin penis that causes positioning opening. Patients diagnosed with hypospadias should be referred for surgical evaluation within first weeks life. If parents want circumcisions their newborns, presence any penile abnormality contraindicate procedure, given is used in arthroplasties. Surgical correction mainstay treatment proximal hyposp...