Background: Salivary glands (SGs) are usually irradiated during radiotherapy for head and neck cancers, which may lead to radiation-induced changes. These changes could be evaluated safely by ultrasonography; however, there have been few studies in this regard. Thus, we aimed to investigate the changes in post-radiotherapy submandibular glands using ultrasonography in patients undergoing head-n...

It seems that virtually every technical paper which describes a new technology to "make the world a better place", includes the term "smart" to refer to some aspect of this new technology. The technical literature is filled with smart capacitors, smart resistors, smart rectifiers, smart op-amps, smart memory, smart circuits, smart cards, smart systems, smart networks, smart partners, smart opin...

background: in treating patients with radiation, the degree of accuracy for the delivery of tumor dose is recommended to be within ± 5% by icru in report 24. the experimental studies have shown that the presence of low-density inhomogeneity in areas such as the lung can lead to a greater than 30% change in the water dose data. therefore, inhomogeneity corrections should be used in treatment pla...

background : tongue cancer is one of the most common cancers of the oral cavity, excluding lip, and the median age of the patients is approximately 60 years. methods : treatment results of a total of 110 patients with oral tongue cancer admitted to cancer institute of tehran university between1999-2003 were retrospectively analyzed. the patients were treated by surgery or radiotherapy or chemot...

in this paper, load and buckling mode of a smart column are presented. the theoretical model is a three-layer piezoelectric composite beam that behaves as an axial actuating mechanism. this actuator consists of an elastic core sandwiched between two piezoelectric active outer layers. the piezoelectric layers are polarized transversely, i.e., the polarization vector is parallel to the applied el...

Ambient Intelligence (AmI) represents a new generation of user-centred computing environments aiming to find new ways to obtain a better integration of information technology in everyday life devices and activities. On the other hand, Ambient Assisted Living (AAL), is an important application domain of AmI that aims to contribute with ICT research applied to enabling assistive living environmen...

introcduction: pigmented villonodular synovitis (pvs) is rare, benign and proliferative disorder of synovium which consists of villous and/ or nodular formations in joints.diagnosis is determined by clinical features, aspiration of the joint, radiographic features and magnetic resonance imaging (mri).the definitive treatment is the complete resection of affected tissue by open or arthroscopic s...

background: mucositis is an important adverse effect of cancer treatment. the aim of this study was to investigate the effect of ice cubes on oral mucositis following head and neck radiotherapy. materials and methods: a randomized controlled trial was conducted on 40 head and neck cancer patients who underwent radiotherapy. the patients were randomly divided into two experimental and control gr...