نتایج جستجو برای: 3d chamber

تعداد نتایج: 228933  

Journal: :iranian journal of radiation research 0
m.a. gadhi bahawalpur institute of nuclear medicine and oncology (bino) bahawalpur, pakistan s.a. buzdar department of physics, the islamia university of bahawalpur, pakistan m. afzal department of physics, the islamia university of bahawalpur, pakistan sh. fatmi bahawalpur institute of nuclear medicine and oncology (bino) bahawalpur, pakistan m.s. akhtar bahawalpur institute of nuclear medicine and oncology (bino) bahawalpur, pakistan a.h. nizamani department of physics, university of sind, jamshoro, hyderabad, pakistan

background: the effectiveness and safety of brachytherapy treatment is mainly concerned with the calibration of sources and their traceability to internationally accepted standards. secondary standard dosimetry laboratory (ssdl) does not offer calibration of ionization chambers with gamma-ray spectrum of high dose rate source 192ir . this work has been carried out to calibrate the high dose rat...

Journal: :journal of dental research, dental clinics, dental prospects 0
davood jamshidi assistant professor,department of endodontics, faculty of dentistry, ghazvin university of medical science, ghazvin, iran alireza adl . assistant professor, department of endodontics, faculty of dentistry, shiraz university of medical science, shiraz, iran fereshte sobhnamayan . assistant professor, department of endodontics, faculty of dentistry, shiraz university of medical science, shiraz, iran. mehrdad bolurian . assistant professor, department of endodontics, faculty of dentistry, ardebil university of medical science, ardebil, iran.

taurodontism is a morphologic feature of generally multi-rooted teeth with large pulp chambers and shortened roots. a case of endodontic treatment in a 24-year-old male with the chief complaint of swelling and pain in the right mandibular region is described. periapical lesion was present in the radiographic examination of hypertaurodont second mandibular molar. four root canals were detected w...

Journal: :iranian journal of radiation research 0
a. solimanian radiation dosimetry and monitoring group agricultural, medical and industrial research school (amirs), nuclear science and technology research institute (nstri), atomic energy organization of iran (aeoi) - karaj, iran m. ghafoori radiation dosimetry and monitoring group agricultural, medical and industrial research school (amirs), nuclear science and technology research institute (nstri), atomic energy organization of iran (aeoi) - karaj, iran

background: absolute dosimetry of external beam radiotherapy is carried out by the use of ionization chambers. these chambers must be calibrated at a standard dosimetry laboratory before any use in clinical dosimetry. the secondary standard dosimetry laboratory of iran (ssdl) has the duty of calibrating the ionization chambers used in radiotherapy centers in iran. materials and methods: the pre...

Journal: :iranian journal of medical physics 0
hamid reza sadoughi m.sc. student of medical physics, medical physics dept., tehran university of medical sciences, tehran, iran mahmood allahverdi associate professor, medical physics dept., tehran university of medical sciences, and radiotherapy physics department of cancer institute, tehran, iran hasan nedaei assistant professor, radiotherapy physics dept., cancer institute, tehran, iran ramin jaberi radiotherapy physicist, radiotherapy physics dept., cancer institute, tehran, iran mahbod esfahani radiotherapy physicist, radiotherapy physics dept., cancer institute, tehran, iran alireza shirazi associated professor, medical physics dept., tehran university of medical sciences, tehran, iran

introduction: multiple fields and presence of heterogeneities create complex dose distributions that need three dimensional dosimetry. in this work, we investigated mr-based magic gel dosimetry as a three-dimensional dosimetry technique to measure the delivered dose to bladder and rectum in prostate radiation therapy. materials and methods: a heterogeneous slab phantom including bones was made....

Journal: :Anticancer research 2012
J Tübel B Saldamli I Wiest U Jeschke R Burgkart

AIM Lewis antigens and the Thomsen-Friedenreich (TF) antigen are complex glycan structures that modulate processes such as cell adhesion and proliferation and tumor metastasis. The aim of our study was to analyze the expression of sialyl Lewis A (sLeA), sialyl Lewis X (sLeX), Lewis Y (LeY), TF, galectin-1 (Gal-1) and galectin-3 (Gal-3) in human osteoblasts in vitro. MATERIALS AND METHODS The ...

Journal: :British journal of anaesthesia 2013
B Cowie R Kluger M Kalpokas

BACKGROUND Developments in transducer technology have enabled the use of three-dimensional transoesophageal echocardiography (3D TOE) in the operating theatre. Transthoracic echocardiography (TTE) 3D left ventricular (LV) volumes and ejection fraction (EF) agree better with magnetic resonance imaging (MRI) measurements, with less intra- and inter-observer variability compared with 2D. This has ...

Journal: :Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention 2012
Kumaradevan Punithakumar Ismail Ben Ayed Ali Islam Aashish Goela Shuo Li

This study investigates regional heart motion abnormality detection via multiview fusion in cine cardiac MR images. In contrast to previous methods which rely only on short-axis image sequences, the proposed approach exploits the information from several other long-axis image sequences, namely, 2-chamber, 3-chamber and 4-chamber MR images. Our analysis follows the standard issued by American He...

Journal: :Oxygen 2021

Many cells in the human body strongly react on decreased oxygen concentrations, generally defined as hypoxia. Therefore, inducing hypoxia vitro is essential for research. Classically, induced using a chamber, but alternative methods exist that do not require special equipment. Here, we compared three different to induce without chamber: chemical stabilization of HIF-1? by CoCl2, decrease perice...

Journal: :British Journal of Ophthalmology 1959

2009
Fredrik Orderud Hans Torp Inge Rabben

In this paper, we present an automatic approach for alignment of standard apical and short-axis slices, and correcting them for out-of-plane motion in 3D echocardiography. This is enabled by using real-time Kalman tracking to perform automatic left ventricle segmentation using a coupled deformable model, consisting of a left ventricle model, as well as structures for the right ventricle and lef...

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