An MRI scanner [主语] uses [谓语] magnetic fields and radio waves [宾语] to track the changes [状语] in oxygenated blood. [定语] 分句-1 The changes [主语] in oxygenated blood [定语] accompany [谓语] mental activity. [宾语] 4. 句子翻译 主句 An MRI scanner uses magnetic fields and...
PURPOSE: To prevent noise like crosstalk by blocking magnetic field and radio waves generated from a circuit on a printed wiring board, with a shielding layer.KAWAKAMI SHIN川上 伸HARUYAMA SATORU春山 哲NIKAIDO KATSUTOMO二階堂 勝友ICHIKAWA JUNICHI...
The MRA equipment includes a magnetic field. So you’ll need to take off anything metal, such as: Jewelry and watches Body piercings Eye glassesandhearing aids Clothing with metal snaps or zippers What to Tell Your Doctor Make sure you tell your doctor or the staff at the MRA facility if...
The MRI is basically a tube-shaped magnet. While you're inside the machine, protons from water in your body get pulled into the magnetic field around you and start to line up. The machine also sends out radio waves that cause these protons to spin. When the waves are turned off, the ...
Chapter 3. Radio Waves and Polaritons in the Presence of an External Static Magnetic Fielddoi:10.1002/3527608125.ch3radiowavespolaritonsanisotropic mediaexternal static magnetic fieldcrystal axispropagation of electromagnetic wavesmagnetic field B 0
A self-consistent theory is presented for the excitation of hydromagnetic waves and the acceleration of 'diffuse' ions upstream of the earth's bow shock in... Martin,A.,Lee - 《Journal of Geophysical Research》 被引量: 617发表: 1982年 The main magnetic field of Jupiter The existence of a...
Magnetic field, a vector field in the neighborhood of a magnet, electric current, or changing electric field, in which magnetic forces are observable. Magnetic fields such as that of Earth cause magnetic compass needles and other permanent magnets to lin
Related to Magnetic waves:Electromagnetic waves e·lec·tro·mag·net·ism (ĭ-lĕk′trō-măg′nĭ-tĭz′əm) n. 1.The physics of electricity and magnetism. 2.An interaction between electricity and magnetism, as when an electric current or a changing electric field generates a magne...
Hoult DI. 1989. The magnetic resonance myth of radio waves. Concepts Magn Reson 1:1-5.Hoult DI. 1989. The magnetic resonance myth of radio waves. Concepts Magn. Reson. 1: 1-5.Hoult, D. I. (1989). The Magnetic Resonance Myth of Radio Waves. Concepts in Magnetic Resonance, Vol.1, ...
An investigation of ground waves at low and medium frequencies has shown that in cluttered or undulating terrain the electric field is reduced relative to the magnetic field. This reduction applies to the median value over large areas and has different characteristics dependent on type of terrain fa...