نتایج جستجو برای: super paramagnetic iron oxide
تعداد نتایج: 363312 فیلتر نتایج به سال:
Introduction: Magnetic particle imaging (MPI) is a method to determine the spatial distribution of super-paramagnetic iron oxide particles (SPIOs) at potentially high sensitivity, high spatial and high temporal resolution [1,2,3]. For magnetic field generation and particle signal reception, electromagnetic coils are used. In their paper [1], Gleich and Weizenecker proposed a tube-like scanner s...
Introduction: Magnetic particle imaging (MPI) is a method capable of determining the spatial distribution of super-paramagnetic iron oxide particles (SPIOs) at potentially high sensitivity, high spatial and high temporal resolution [1,2,3]. The feasibility of a single-sided coil arrangement for field generation and reception of the particle signal was shown in [4]. There, the object of interest...
Introduction: Magnetic particle imaging (MPI) is a new tomographic method [1] based on the nonlinear response of super-paramagnetic iron oxide (SPIO) nanoparticles. It has promise for fast imaging in the submillimeter range with some advantages in sensitivity, contrast, and cost in comparison with MRI. A static but spatially inhomogeneous field (selection field) and homogeneous oscillating fiel...
Cell-based therapy exploits modified human cells to treat diseases but its targeted application in specific tissues, particularly those lying deep in the body where direct injection is not possible, has been problematic. Here we use a magnetic resonance imaging (MRI) system to direct macrophages carrying an oncolytic virus, Seprehvir, into primary and metastatic tumour sites in mice. To achieve...
This study explored the imaging capability of our frequency-domain photoacoustic (FD-PA) system that utilizes correlation processing alias “photoacoustic radar” and ultrasonic phased array for imaging of soft tissues. The probe imaging capabilities were studied using tissuemimicking phantoms, tissue samples ex vivo, blood vessels in a human wrist and a rat tumour model in vivo. Our experimental...
in this study, fe 3 o 4 superparamagnetic nanoparticles were synthesized and stabilized by chitosan. then the nanoparticles were characterized by fourier transform infrared spectroscopy and transmission electron microscopy (tem). particle size distribution and zeta potential of the particles also was assessed using malvern zetasizer. the paramagnetic behaviors of the uncoated and chitosan coate...
Introduction: Many MRI techniques are now capable of imaging cells that have been labelled with super-paramagnetic iron oxide (SPIO) [1], and these techniques will be of great benefit to the developing field of cellular therapy. However, the majority of these techniques are not capable of providing quantitative information about cellular density at high iron concentrations, which is critical to...
background: finding a suitable method for rapid, accurate and reliable estimation of absorbed dose has high priority in management of the radiation exposed persons. shortly after radiation exposure, apoptosis is a major detriment in proliferative tissues such as the hematopoietic system. therefore, quantification of apoptosis in these tissues could be useful for rapid estimation of radiation ex...
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