Projection
发表于 2025-4-1 03:25:38
ic field.Complex subject conveyed in simplified, portable foThe book provides an introduction to CMR imaging that is understandable and focused on the relevant information needed to using CMR imaging in clinical practice. Cardiovascular magnetic resonance (CMR) imaging has become an established imag
FLUSH
发表于 2025-4-1 10:01:06
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Panther
发表于 2025-4-1 10:35:46
What’s Inside the Magnet and Why?c field that can be rapidly switched on and off and a radiofrequency (RF) magnetic field. A typical MRI system therefore consists of three main components that generate these three fields; the main magnet, the gradient coil assembly and the integral rf body transmitter coil. The most common main mag
到婚嫁年龄
发表于 2025-4-1 15:17:49
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完成
发表于 2025-4-1 20:53:01
Protons and Spins: The Origin of the MR Signalty known as Nuclear Spin. This combined with the proton’s positive charge gives rise to a small magnetic field, known as a magnetic moment. In the presence of the externally applied B. field, the magnetic moments tend to align either with or against the externally applied magnetic field. An equilibr
死亡率
发表于 2025-4-2 02:17:10
Generating a Signal: RF Pulses and Echoesns at the Larmor Frequency. The Larmor frequency (resonant frequency) is proportional to the strength of the magnetic field and is typically in the Megahertz range. The RF field is normally applied as a short pulse, known as an rf pulse. When it is applied, the proton magnetic moments start to rotat