Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9587417 | Journal of Magnetic Resonance | 2005 | 8 Pages |
Abstract
A set of plate form three-dimensional magnetic gradient coils was developed and used in electron spin resonance imaging (ESRI) experiment. The coils were processed with whole copper plates instead of wound with copper wires, which made its structure so compact that it was much thinner and smaller comparing to those traditionally used in ESRI. The coil set had a pie-like appearance of which the total thickness was only 14Â mm and the outer diameter was 250Â mm. The efficiency of the coils could be greater than 10Â mT/m/A when distance between the two side-pieces was 63Â mm. A maximum gradient strength of more than 200Â mT/m could be obtained with driving current of about 20Â A in each dimension coil. The spatial linearity was better than 5% in all three dimensions within the available spatial linearity area of larger than a sphere of 40Â mm in diameter. The stability of the gradients strength could reach the level of 10â5. An imaging resolution of better than 1Â mm could be achieved with the coil set. Some preliminary practical imaging results show that the developed gradient coil set is suitable for L-band ESRI experiment of biological samples or even in vivo small animals.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Wu Ke, Huang Changgang, Cong Jianbo, Xian Hong, Wang Changzhen, Gao Shangkai,