Siemens Aktiengesellschaft

Siemens Healthcare Gmbh

Yan Chen

Markus Vester

Jian Wang

Xiang Zhang

Zhibin Li

Yu Tang

Shu Du

Yan Heng Zhou

Ning Zhao

Xing Long Ma

Qi Yu

Chong Xing Zheng

Jun Gao

Sheng You Wang

Frequency converter

A radio-frequency system for a magnetic resonance apparatus has a local coil, a body coil, and an impedance adjusting shield. The body coil is wirelessly power-coupled with the local coil such that the body coil serves as a transmitting coil for radio-frequency signals and the local coil serves as a receiving coil for magnetic resonance signals. The local coil is disposed in an internal cavity of the impedance adjusting shield. An impedance of the local coil is adjusted by the impedance adjusting shield so as to match the impedance of the local coil and the body coil. The impedance adjusting shield has a frequency modulation element that adjusts the resonance frequency of the local coil. The body coil couples power to the local coil, and the impedance adjusting shield effectively reduces energy transmission efficiency loss caused by reflection, thereby improving energy transmission efficiency.

Radio-frequency system for a magnetic resonance apparatus

Encoder for an electric motor

A body coil includes a first end ring and a second end ring provided at two ends thereof. The first end ring and the second end ring are connected to each other with a plurality of legs. The first end ring or the second end ring has a structure with the current flow width in a direction parallel to the axis thereof being greater than that in a direction perpendicular to the axis thereof. Since the effective action width of the current is increased in the axial direction and the centralized flow of the current in the end ring is reduced, the local specific absorption rate of radio frequency induced by the magnetic field is therefore reduced.

Body coil for magnetic resonance imaging

Growing community of inventors

Shenzhen, China

Yan Chen