Deschide documentul
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Informaţii generale |
| Autor |
Martel, Sylvain |
| Publicat |
InTech Open Access Publisher, 2013
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| Ediţie |
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| Detaliază |
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| ISBN |
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| Abstract |
Magnetic Resonance Navigation (MRN) relies
on the use of an upgraded clinical Magnetic Resonance
Imaging (MRI) scanner to navigate therapeutic, imaging,
or diagnostic magnetic micro‐agents in the vascular
network. Although the high homogeneous field in the
tunnel of the MRI scanner increases the magnetization of
the navigable agents towards full saturation, the magnetic
gradients superposed on such a high homogeneous field,
generated by the Imaging Gradient Coils (IGC) typically
used for MR‐image slice selection, allow the induction of
pulling forces to steer such agents in the targeted
branches at the vessel’s bifurcations. However, increasing
the magnitude of such gradients leads to a significant
decrease of the duty cycle, leading to a substantial
reduction of the effective steering force being applied. To
increase such a duty cycle, a Steering Gradient Coils
(SGC) assembly capable of higher magnitudes while
maintaining a 100% duty cycle can be installed at the cost
of a much slower slew rate. Here, the use and the
potential effectiveness of IGC and/or SGC for guiding
such agents are briefly investigated on the basis of known
specifications and experimental data. |
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International Journal of Advanced Robotic Systems
Autor: Ottaviano, Erika; Ceccarelli, Marco; Husty, Manfred; Yu, Sung-Hoon; Kim, Yong-Tae; Park, Chang-Woo; Hyun, Chang-Ho; Chen, Xiulong; Feng, Weiming; Sun, Xianyang; Gao, Qing; Grigorescu, Sorin M.; Pozna, Claudiu; Liu, Wanli; Zhankui, Wang; Guo, Meng; Fu, Guoyu; Zhang, Jin; Chen, Wenyuan; Peng, Fengchao; Yang, Pei; Chen, Chunlin; Ding, Rui; Yu, Junzhi; Yang, Qinghai; Tan, Min; Polden, Joseph; Pan, [...]
Publicat: 2004
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