Patent ID: 7368912

Claim:
A nuclear magnetic resonance imaging (MRI) configuration comprising: a magnet system for generating a homogeneous magnetic field B 0 in a volume under investigation; a radio frequency (RF) system for generating an RF field B 1 in the volume under investigation or for detecting an RF field B 1 , from the volume under investigation; a gradient system for temporarily superposing defined gradient fields on the magnetic field B 0 ; and an MRI phantom positioned in the volume under investigation to aid in determining a homogeneity of the magnetic field B 0 and/or the RF field B 1 and/or the linearity and/or intensity and/or scaling of the gradient fields in the volume under investigation, wherein the MRI phantom has a chamber disposed in a housing and filled with a liquid in which a gas bubble forms, wherein the liquid contains nuclei which have an NMR relaxation time T 1 of between 100 ms and 20 s, the chamber of the MRI phantom having a main chamber and a partial chamber, wherein the main chamber is delimited from the partial chamber such that the gas bubble can completely enter the partial chamber by changing a spatial orientation of the MRI phantom due to buoyancy of the gas bubble, and which remains in the partial chamber in a measurement orientation of the MRI phantom due to that buoyancy.