1 Project Summary The goal of this research is to develop a general-purpose computational scheme for representing the geometry and physics of human-body soft-tissue structures and simulating their displacements and deformations in real-time when external forces are applied by surgical instruments. The ability to realistically model soft tissues on a computer has the potential to radically chang...

Soft tissue models are of fundamental interest to minimally invasive surgery. As the proprioceptive feedback in these procedures is limited, visualization and augmentation can greatly enhance the efficacy of these procedures. We are interested in the modeling and validation of soft tissue response to surgical instruments, and in particular, soft tissue behavior during punctures. A system for th...

biomechanical properties of soft tissue, such as liver, are important in modeling computer aided surgical procedures. experimental evidences show that liver tissue is transversely isotropic. in this article, considering the liver tissue as an incompressible fiber-reinforced composite with one family of fibers, an exponential strain energy function (sef) is proposed. the proposed sef is based on...

The ongoing pursuit of aesthetic excellence in the field of implant therapy has incorporated prosthetic concepts in the early treatment-planning phase, as well as the previously discussed surgical concepts. The literature has addressed these prosthetic and laboratory approaches required to enhance and perfect the soft and hard tissue management (SHTM). After surgically providing an acceptable h...

background cancer pain may be a major problem for health care providers worldwide. according to different studies reporting the pain severity, one-third of patients reported to have moderate to severe pain. management of cancer pain is one of the most important goals of palliative care. recently, different research results on the efficacy of opioid analgesics in chronic pain management have pla...

introduction: high prevalence of rhinoplasty in the community and lack of structured studies about its minor skin and soft tissue complications, point out the necessity of performing precise and comprehensive studies. the aim of this study was to determine the frequency of minor cutaneous and soft tissue complications of rhinoplasty.  materials and methods: 110 patients (30 male and 80 female, ...

Accepted: October 30, 2015. Soft tissue modeling for the creation of a haptic simulator for training medical skills has been the focus of many attempts up to now. In soft tissue modeling the most important parameter considered is its being real-time, as well as its accuracy and sensitivity. In this paper, ANFIS approach is used to present a nonlinear model for soft tissue. The required data for...

objective: the aim of this study is to evaluate the effect of tissue composition on dose distribution in electron beam radiotherapy. methods : a siemens primus linear accelerator and a phantom were simulated using mcnpx monte carlo code. in a homogeneous cylindrical phantom, six types of soft tissue and three types of tissue-equivalent materials were investigated. the tissues included muscle (s...

needle insertion is a minimally invasive technique in diagnosing and treating tumors. however, to perform a surgery accurately, the tissue should have minimum amount of displacement during needle insertion so that it reaches the target tissue. therefore, the tissue membrane has to move less to decrease rupturing under the membrane. in this study, the effect of different design parameters on dis...