Tehran University of Medical Sciences Frontiers in Biomedical Technologies 2345-5837 2 1 2015 03 30 55 59 EN Mohammadhasan Owlia Research Center for Biomedical Technologies and Robotics (RCBTR), Tehran University of Medical Sciences (TUMS), Tehran, Iran AND School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran. Mostafa Khabbazan Research Center for Biomedical Technologies and Robotics (RCBTR), Tehran University of Medical Sciences (TUMS), Tehran, Iran. Mehdi Moradi Research Center for Biomedical Technologies and Robotics (RCBTR), Tehran University of Medical Sciences (TUMS), Tehran, Iran. Hadi Khan-Mohammadi Research Center for Biomedical Technologies and Robotics (RCBTR), Tehran University of Medical Sciences (TUMS), Tehran, Iran. Mehrangiz Ashiri Research Center for Biomedical Technologies and Robotics (RCBTR), Tehran University of Medical Sciences (TUMS), Tehran, Iran AND Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran. Mehdi Seraj Ansari Research Center for Biomedical Technologies and Robotics (RCBTR), Tehran University of Medical Sciences (TUMS), Tehran, Iran AND Department of Electrical Engineering, Amir Kabir University of Technology, Tehran, Iran. Alireza Alamdar Research Center for Biomedical Technologies and Robotics (RCBTR), Tehran University of Medical Sciences (TUMS), Tehran, Iran AND Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran. Alireza Mirbagheri Research Center for Biomedical Technologies and Robotics (RCBTR), Tehran University of Medical Sciences (TUMS), Tehran, Iran AND Department of Medical Physics and Biomedical Engineering, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran. 2015 11 08 2015 11 08 Purpose: Virtual reality based minimally invasive surgical trainers have been proved to be highly effective for training of surgical residents before clinical practice. In this article we introduce the SinaSim, a low-cost laparoscopic surgery simulator based on virtual reality environment. Methods: The most important part in developing a virtual reality system is to making the virtual reality software of a surgical practice and modeling the physical properties and reaction of soft tissues in real time. At SinaSim we used a newly developed graphical engine to minimize the cost and maximize the widespread usage of this system. Results: Screenshots of the final graphical view of each training task as well as graphical user interface which provides the trainees with necessary information about their learning progress, are included in this report. Conclusion: The preliminary results of this study shows that the performance of both hardware and software of the SinaSim laparoscopic surgery simulator are comparable with a commercial virtual reality based trainer in spite of its lower final price. https://fbt.tums.ac.ir/index.php/fbt/article/view/43 https://fbt.tums.ac.ir/index.php/fbt/article/download/43/40