کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5491171 1524794 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Three-dimensional magnetic nanoparticle imaging using small field gradient and multiple pickup coils
ترجمه فارسی عنوان
تصویربرداری نانو ذرات مغناطیسی سه بعدی با استفاده از گرادیان میدان کوچک و کویل چند وانت
کلمات کلیدی
تصویربرداری ذرات مغناطیسی، سیم پیچ چندگانه، میدان گرادیان، روش حداقل مربعات غیر انتزاعی، تصویربرداری سه بعدی،
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
چکیده انگلیسی
We propose a magnetic particle imaging (MPI) method based on third harmonic signal detection using a small field gradient and multiple pickup coils. First, we developed a system using two pickup coils and performed three-dimensional detection of two magnetic nanoparticle (MNP) samples, which were spaced 15 mm apart. In the experiments, an excitation field strength of 1.6 mT was used at an operating frequency of 3 kHz. A DC gradient field with a typical value of 0.2 T/m was also used to produce the so-called field-free line. A third harmonic signal generated by the MNP samples was detected using the two pickup coils, and the samples were then mechanically scanned to obtain field maps. The field maps were subsequently analyzed using the nonnegative least squares method to obtain three-dimensional position information for the MNP samples. The results show that the positions of the two MNP samples were estimated with good accuracy, despite the small field gradient used. Further improvement in MPI performance will be achieved by increasing the number of pickup coils used.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 427, 1 April 2017, Pages 144-150
نویسندگان
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