نتایج جستجو برای: soft tissue insertion

تعداد نتایج: 1050885  

Journal: :journal of dentistry, shiraz university of medical sciences 0
leila khojastepour dept. of oral and maxillofacial radiology, school of dentistry, shiraz university of medial science, shiraz, iran. abdolaziz haghnegahdar dept. of oral and maxillofacial radiology, school of dentistry, shiraz university of medial science, shiraz, iran. hamed sayar post graduate student, dept. of oral and maxillofacial radiology, school of dentistry, shiraz university of medial science, shiraz, iran.

statement of the problem: most of the soft tissue calcifications within the head and neck region might not be accompanied by clinical symptoms but may indicate some pathological conditions. purpose: the aim of this research was to determine the prevalence of soft tissue calcifications in cone beam computed tomography (cbct) images of mandibular region. materials and method: in this cross sectio...

2003
Simon P. DiMaio Septimiu E. Salcudean

Needle insertion for percutaneous therapies is formulated as a trajectory planning and control problem. A new concept of needle steering is developed and a Needle Manipulation Jacobian is defined using numerical needle insertion models that include needle deflection and soft tissue deformation. This concept is used in conjunction with a potentialfield-based path planning technique to demonstrat...

2004
Chad Schneider Jessica R. Crouch Allison M. Okamura A. Okamura

Models that predict soft tissue deformation during needle insertion could improve the accuracy of needle based medical procedures. In an effort to establish a method for defining and validating such models, we present an experimental setup including hardware and software for recording and measuring the time-dependent, 3D deformation that occurs as a needle is inserted into soft material. Algori...

2003
Simon P. DiMaio

Precise needle placement is required for the success of a wide variety of percutaneous interventions in medicine. Insertions into soft tissues can be difficult to learn and to perform, due to tissue deformation, needle deflection and limited visual feedback. Little quantitative information is known about the interaction between needles and soft tissues during puncture, and no effective physical...

2004
Chad Schneider Jessica R. Crouch Allison M. Okamura A. Okamura

Models that predict soft tissue deformation during needle insertion could improve the accuracy of needle based medical procedures. In an effort to establish a method for defining and validating such models, we present an experimental setup including hardware and software for recording and measuring the time-dependent, 3D deformation that occurs as a needle is inserted into soft material. Algori...

Journal: :Acta of bioengineering and biomechanics 2016
Peng Su Yang Yang Leiyu Zhang Long Huang

PURPOSE This paper is mainly about biomechanical behavior of needle insertion into cornea, and proposes a failure criterion to simulate the insertion process which has attracted considerable attention due to its importance for the minimally invasive treatment. METHODS In the process of needle insertion into cornea, tiny and complex insertion force is generated due to contact between needle an...

Journal: :anesthesiology and pain medicine 0
karim hemati department of anesthesiology, imam khomieni teaching hospital, ilam university of medical sciences, ilam, iran behrooz zaman department of anesthesiology, hazrat fatemeh teaching hospital, iran university of medical sciences, tehran, iran; department of anesthesiology, fatemeh zahra teaching hospital, iran university of medical sciences, tehran, iran. tel: +98-9123047764, fax: +98-2166509059 valliolah hassani department of anesthesiology, rasool akram teachig hospital, iran university of medical sciences ,tehran, iran farnad imani department of anesthesiology, rasool akram teachig hospital, iran university of medical sciences ,tehran, iran parviz dariaie imam khomeini teaching hospital, tehran university of medical sciences, tehran, iran

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...

Journal: :iranian journal of otorhinolaryngology 0
shadman nemati otolaryngology, head and neck surgery department and research center, amiralmomenin hospital, guilan university of medical sciences, rasht, iran javad golchay department of dermatology, guilan university of medical sciences, rasht, iran arsalan alizadeh otolaryngology, head and neck surgery research center, amiralmomenin hospital, rasht, iran

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, ...

Journal: :journal of biomedical physics and engineering 0
m ghorbani medical physics department, faculty of medicine, mashhad university of medical sciences, mashhad, iran z s tabatabaei medical physics department, faculty of medicine, mashhad university of medical sciences, mashhad, iran a vejdani noghreiyan medical physics department, faculty of medicine, mashhad university of medical sciences, mashhad, iran h vosoughi medical physics department, faculty of medicine, mashhad university of medical sciences, mashhad, iran c knaup comprehensive cancer centers of nevada, las vegas, nevada, usa

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...

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