نتایج جستجو برای: geometric phantom equivalent body

تعداد نتایج: 957899  

A. Shakeri-zadeh P. Shokrani S. Haghjooy Javanmard S. Pandesh

Introduction: Photothermal therapy using gold nanoshells is one of cancer therapy methods. Gold nanoshells generally consist of a silica core and a thin gold shell. Fe3O4@Au core-shell can be used for magnetic targeted therapy. The objective of this study was investigation of the photothermal effects of magnetically targeted Fe3O4@Au NPs and NIR laser irradiation on model of me...

Journal: :Journal of magnetic resonance 2004
Feng Liu Stuart Crozier

This paper evaluates a new, low-frequency finite-difference time-domain method applied to the problem of induced E-fields/eddy currents in the human body resulting from the pulsed magnetic field gradients in MRI. In this algorithm, a distributed equivalent magnetic current is proposed as the electromagnetic source and is obtained by quasistatic calculation of the empty coil's vector potential o...

Journal: :iranian journal of radiation research 0
m. allahverdi department of medical physics, tehran university of medical sciences, tehran, iran gh. geraily department of medical physics, tehran university of medical sciences, tehran, iran m. esfehani departments of radiology, iran university of medical sciences, tehran, iran a. sharafi department of radiotherapy and oncology, cancer institute, tehran university of medical sciences, tehran, iran a. shirazi department of medical physics, tehran university of medical sciences, tehran, iran

background: total body irradiation (tbi) is different from standard radiotherapy in many aspects, so it is not easy to predict the delivered dose to the patient under tbi treatment. diode dosimetry procedures for surface dose reading can help to define variations of the actually delivered dose from the prescribed one. the aim of this study was to describe the measurements made to calibrate diod...

2014
Hiroyoshi Fukukita Kazufumi Suzuki Keiichi Matsumoto Takashi Terauchi Hiromitsu Daisaki Yasuhiko Ikari Naoki Shimada Michio Senda

This synopsis outlines the Japanese guideline Version 2.0 for the data acquisition protocol of oncology FDG-PET/CT scans that was created by a joint task force of the Japanese Society of Nuclear Medicine Technology, the Japanese Society of Nuclear Medicine and the Japanese Council of PET Imaging, and was published in Kakuigaku-Gijutsu 2013; 33:377-420 in Japanese. The guideline aims at standard...

2004
Mark A Jackson

Amputation of a body part, whether as a result of trauma or surgical intervention, is almost always associated with awareness of, and sensations referred to, the missing body part. These sensations were first noted by Ambroise Pare, a French military surgeon in the middle of the 16th century. Mitchel first used the term `phantom' in 1871 from his observations and medical studies of the American...

Introduction: Existing phantoms have been constructed based on Caucasian, non-Caucasian and race-specific datasets. According to previous studies made efforts to present Korean- specific phantoms and Chinese female phantom based on CVH dataset due to compare the resulting internal dosimetry with the Caucasian based data showed possible racial difference in human anatomy between ...

2016
Hao Xi Xiaoshi Qian Meng-Chien Lu Lei Mei Sebastian Rupprecht Qing X. Yang Q. M. Zhang

Iron is a trace mineral that plays a vital role in the human body. However, absorbing and accumulating excessive iron in body organs (iron overload) can damage or even destroy an organ. Even after many decades of research, progress on the development of noninvasive and low-cost tissue iron detection methods is very limited. Here we report a recent advance in a room-temperature ultrasensitive bi...

A. Sedghi, M. Hajizadeh Saffar, M.H. Bahrayni-Toosi, S. Nekoee,

ABSTRACTBackground: as fluoroscopy or different angiographies are usually evaluated using TL dosimeter. Thismethod is a time-consuming procedure therefore, radiologists are usually worried and unawareof their exact radiation dose received during each fluoroscopy or angiography. In this study, anew trend for quick estimation of effective dose based on measuring air-absorbed dose of thescattered ...

2003
E Kuon J Birkel M Schmitt J B Dahm

Background: Occupational head exposure to radiation in cardiologists may cause radiation induced cataracts and an increased risk of brain cancer. Objective: To determine the effectiveness of 0.5 mm lead equivalent caps, not previously used in invasive cardiology, in comparison with a 1.0 mm lead equivalent ceiling mounted lead glass screen. Design: An anthropomorphic Alderson-Rando phantom was ...

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