Nuclear magnetic resonance apparatus having a detection coil including a decoupling circuit with p-i-n diodes

Abstract

Abstract The n.m.r appts. has a magnetic system to generate a static homogenic main magnetic field and another system to generate graded fields. A transmitting coil generates a spatially homogenic h.f alternating magnetic field in an investigation area. A detector coil (L) registers the resonance signals produced in the investigated object. These signals are then processed. At least one PIN diode (P2) is in series in the resonance circuit (L,C1,C2,C3). At least one other is in series in the line leading to the processing circuitry. A PIN diode (P6) ensures that no current can flow in the lead to the detector after the resonance circuit is switched off. Further PIN diodes (P4,P5) ensure that no h.f current can flow in the leads to the tuning capacitor (DCT) and the equalising capacitor (DCM).

Inventors

• 👤 Teunis Robert Van Heelsbergen

Bibliographic Details