High-frequency apparatus for nuclear spin tomography

An apparatus for generating an image of a body, said apparatus comprising:

• (a) a high-frequency transmitter capable of exciting a nuclear spin in the body, said nuclear spin generating an original B-field component;
• and
• (b) a high-frequency receiver capable of detecting the original B-field component, said high-frequency receiver comprising an electrically-insulated local coil device to be disposed on the body and an external receiving antenna surrounding said local coil device and inductively coupled therewith, said local coil device including a first antenna loop, a second antenna loop, and an amplifier unit coupled between said first and second antenna loops, wherein said local coil device generates a new B-field component in response to the original B-field component, the new B-field component being substantially orthogonal to the original B-field component.

A local coil device for use in a nuclear spin tomography apparatus including a high-frequency transmitter for exciting nuclear spin in a body to be imaged and a high-frequency receiver for detecting a first B-field component generated by the nuclear spin, the high-frequency receiver including an external receiving antenna surrounding said local coil device, said local coil device comprising two antenna loops with an amplifier unit coupled between them, said local coil device capable of detecting the first B-field component and responsively generating a second B-field component to be detected by the external receiving antenna, the second B-field component being oriented substantially orthogonal to the first B-field component.