Cone-beam computed tomography (CBCT) presents a highly promising and challenging advanced application of flatpanel detectors (FPDs). The great advantage of this adaptable technology is in the potential for sub-mm 3D spatial resolution in combination with soft-tissue detectability. While the former is achieved naturally by CBCT systems incorporating modern FPD designs (e.g., 200 – 400 um pixel p...

In this paper, new insights in the near infrared imaging process used finger-vein recognition by developing a physical model are presented. A realistic phantom finger that mimics living human and also includes veins has been developed to validate model. NIR images show can emulate optical properties of provide ground truth for locations veins. Through modeling, it is particularly learned that—b...

We study the deformation and haptic feedback of soft tissue in virtual surgery based on a liver model by using a force feedback device named PHANTOM OMNI developed by SensAble Company in USA. Although a significant amount of research efforts have been dedicated to simulating the behaviors of soft tissue and implementing force feedback, it is still a challenging problem. This paper introduces a ...

The aim of this study is to determine the effects correction-based algorithms on dose distributions in inhomogeneous medium and dosimetric parameters depending preferred breast lung treatment plans. In planning system (TPS) which Pencil Beam Convolution (PBC) calculation algorithm used, calculations were performed different Modified Batho Equivalent Tissue-Air Ratio (ETAR) for soft tissue, bone...

Introduction: Clinical conditions affecting soft tissue often present with altered mechanical properties (e.g. tumours, fibrosis and/or malignancy). Hence, the MRI based non-invasive analysis of soft tissue mechanical properties has been the focus of many fields of research. Soft tissue mechanical properties are nonlinear with respect to strain, strain-rate and frequency and, due to strain stif...

BACKGROUND Surgical simulation systems can be used to estimate soft tissue deformation during pre- and intra-operative planning. Such systems require a model that can accurately predict the deformation in real time. In this study, we present a back-propagation neural network for predicting three-dimensional (3D) deformation of a phantom that incorporates the anatomy of the male pelvic region, i...

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, ...

Background and Aim: Bone density is of great assistance in the selection of the proper implant site. The present study aimed to assess the correlation between tissue densities in computed tomography (CT) and three different cone-beam computed tomography (CBCT) units. Materials and Methods: In this descriptive study, a radiographic phantom consisting of a transparent polymethyl methacrylate (PM...

Clear gel ballistic phantom is used in medical physics to model the interaction of soft biological tissues with radiation. With emergence of new technologies like nanomedicine utilizing nanoparticles injected into the tumor and activated by optical radiation, it is important to study the optical properties of those particles injected into the gel phantom. For this purpose, we present the result...