A pediatric magnetic resonance (MRI) system and sub-system are provided. The pediatric MRI system includes a magnet-gradient assembly, an RF shield-body coil assembly and a pediatric MRI sub-system. The pediatric MRI sub-system includes an infant warmer or isolette having a patient section for accommodating a patient. The infant warmer is positionable relative to the magnet-gradient-body coil assembly of the pediatric MRI system. The pediatric MRI sub-system also includes a warming mattress arranged within the patient section of the infant warmer. The infant warming mattress includes an interior space filled at least partially with a host medium and a conduction heating system at least partially arranged in the interior space to conduct heat to the interior space of the infant warming mattress. The pediatric MRI system also includes at least one local radio frequency (RF) coil that is positionable within the patient section of the infant warmer.

Temperature control system for an NMR sample tube (22) using a temperature control device (20) with an interior (21) delimiting a cylindrical wall (39) in the radially outward direction and a plurality of flow channels for temperature-controlling fluid running radially around the interior, of which the radially outermost flow channel (28) is delimited to the outside by a wall (29), and the innermost flow channel (31) by a wall (30) and connected to one another by a first fluid passage (34). The innermost flow channel has a second fluid passage (36) to the interior and the outermost flow channel has a fluid inlet (32). During operation, the wall delimiting the interior in the radially outward direction is temperature-controlled by the fluid so that: abs (T.sub.U−T.sub.W)≤abs (T.sub.U−T.sub.FD), where T.sub.W is the wall temperature, T.sub.FD is the fluid temperature at the first fluid passage and T.sub.U is the ambient temperature.

Temperature control system for an NMR sample tube (22) using a temperature control device (20) with an interior (21) delimiting a cylindrical wall (39) in the radially outward direction and a plurality of flow channels for temperature-controlling fluid running radially around the interior, of which the radially outermost flow channel (28) is delimited to the outside by a wall (29), and the innermost flow channel (31) by a wall (30) and connected to one another by a first fluid passage (34). The innermost flow channel has a second fluid passage (36) to the interior and the outermost flow channel has a fluid inlet (32). During operation, the wall delimiting the interior in the radially outward direction is temperature-controlled by the fluid so that: abs (T.sub.U−T.sub.W)≤abs (T.sub.U−T.sub.FD), where T.sub.W is the wall temperature, T.sub.FD is the fluid temperature at the first fluid passage and T.sub.U is the ambient temperature.

Microwave resonance cavities and associated methods and apparatus are described. In one example, a cavity (100) comprises a first and a second input port (102, 104) for inputting microwave radiation at a first and a second frequency respectively. The microwave radiation at the first frequency may be to excite a sample in the cavity whereas the microwave radiation at the second frequency may be to interrogate a sample in the cavity for analysis. The cavity has dimensions such that it resonates at both the first and the second frequency.

A method includes the steps of: introducing a medium with a first temperature into a measuring volume; carrying out nuclear magnetic measurements on the medium with the first temperature; determining a property of the medium at the first temperature; determining a viscosity of the medium at the first temperature using the property; and determining a derived property of the medium at a second temperature using the property of the medium at the first temperature, the viscosity of the medium at the first temperature, the first temperature, and the second temperature. The property is at least one of a first spin-lattice relaxation time constant, a first spin-spin relaxation time constant, and a first diffusion time constant. The derived property is at least one of a second spin-lattice relaxation time constant, a second spin-spin relaxation time constant, and a second diffusion time constant.

A method includes the steps of: introducing a medium with a first temperature into a measuring volume; carrying out nuclear magnetic measurements on the medium with the first temperature; determining a property of the medium at the first temperature; determining a viscosity of the medium at the first temperature using the property; and determining a derived property of the medium at a second temperature using the property of the medium at the first temperature, the viscosity of the medium at the first temperature, the first temperature, and the second temperature. The property is at least one of a first spin-lattice relaxation time constant, a first spin-spin relaxation time constant, and a first diffusion time constant. The derived property is at least one of a second spin-lattice relaxation time constant, a second spin-spin relaxation time constant, and a second diffusion time constant.

A rotational force is applied to a sample tube by blowing of a drive gas to the sample tube. A spinning frequency of the sample tube is sequentially detected as a detection value. Acceleration control to gradually increase a pressure of the drive gas is executed until the detection value reaches a target value. In a process of the acceleration control, abnormality is determined based on a change with respect to time (difference: ΔF) of the detection value. The determination is executed in a section of interest including a resonance frequency.

An apparatus (10) for checking a component (30) is disclosed. The apparatus (10) comprises a sample holder (20) with a module (28) for receiving at least one component (30), at least one magnetic field generator (60a, 60b, 60c) for generating a magnetic field around the module (28), an inlet (40) for feeding a tempered medium into the module (25), and an outlet (45) for discharging a tempered medium from the module (28).

An apparatus (10) for checking a component (30) is disclosed. The apparatus (10) comprises a sample holder (20) with a module (28) for receiving at least one component (30), at least one magnetic field generator (60a, 60b, 60c) for generating a magnetic field around the module (28), an inlet (40) for feeding a tempered medium into the module (25), and an outlet (45) for discharging a tempered medium from the module (28).

An NMR spectrometer (1) with a magnet system (2), which has a bore (3) through the magnet center (4) for inserting a measuring sample (5) in a transport container (7), and with a transport device for pneumatic transport of the sample through a transport channel (8) into and out of the magnet system. The transport device includes a mechanical interface (9) with a mounted exchange system (10) which has parking receptacles (11) temporarily storing the transport containers. In a transport position, the parking receptacle is inserted into the transport channel, to be loaded with a transport container, removed from the transport channel for temporarily storing the transport container, and reinserted into the transport channel for further transport of the transport container. In the transport position, the parking receptacle forms a part of the transport channel, which permits a faster automated change of the measuring samples in short measurement cycle times.