Abstract: A nuclear magnetic resonance (NMR) apparatus includes at least one magnet arranged to induce a static magnetic field in a sample chamber. The static magnetic field has a known amplitude distribution. At least one radio frequency antenna is configured to induce a radio frequency magnetic field in the sample chamber at a predetermined frequency and a predetermines bandwidth. The static magnetic field amplitude at a sample chamber boundary has substantially at most two values.

Abstract: A nuclear magnetic resonance (NMR) apparatus includes at least one solenoid configured to induce a radio frequency magnetic field in a sample. The sample is located inside the solenoid. At least one cylindrical magnet is arranged to induce a static magnetic field in the sample, wherein the magnet is located inside the sample.

Abstract: A nuclear magnetic resonance (NMR) apparatus includes at least one magnet configured to induce a static magnetic field in a sample of material to be analyzed, wherein the sample is disposed on one side of the at least one magnet. The at least one magnet is configured such that the static magnetic field induced in the sample of material to be analyzed is substantially planar along lines of equal static magnetic field amplitude. A method includes inducing a static magnetic field in a sample of material to be analyzed. The static magnetic field is substantially planar along surfaces of equal amplitude of the static magnetic field. The inducing originates on one side of the sample. A radio frequency magnetic field is induced in the sample substantially orthogonally to the static magnetic field. NMR phenomena excited in the sample are detected.

Abstract: A nuclear magnetic resonance (NMR) apparatus includes at least one magnet configured to induce a static magnetic field in a sample of material to be analyzed. At least one radio frequency antenna is configured to induce a radio frequency magnetic field in the sample of material to be analyzed. The sample chamber is disposed in a substantially longitudinally continuous sample holder separated into discrete sample chambers. Each sample chamber has an internal opening dimension such that substantially all of each sample is affected by surface contact phenomena with an internal wall of each sample chamber.

Abstract: A nuclear magnetic resonance (NMR) apparatus includes at least one magnet configured to induce a static magnetic field in a sample of material to be analyzed. At least one radio frequency antenna is configured to induce a radio frequency magnetic field in the sample of material to be analyzed. The sample chamber is disposed in a substantially longitudinally continuous sample holder separated into discrete sample chambers. Each sample chamber has an internal opening dimension such that substantially all of each sample is affected by surface contact phenomena with an internal wall of each sample chamber.

Abstract: A nuclear magnetic resonance (NMR) apparatus includes at least one magnet configured to induce a static magnetic field in a sample of material to be analyzed, wherein the sample is disposed on one side of the at least one magnet. The at least one magnet is configured such that the static magnetic field induced in the sample of material to be analyzed is substantially planar along lines of equal static magnetic field amplitude. A method includes inducing a static magnetic field in a sample of material to be analyzed. The static magnetic field is substantially planar along surfaces of equal amplitude of the static magnetic field. The inducing originates on one side of the sample. A radio frequency magnetic field is induced in the sample substantially orthogonally to the static magnetic field. NMR phenomena excited in the sample are detected.

Abstract: A nuclear magnetic resonance (NMR) apparatus includes at least one magnet arranged to induce a static magnetic field in a sample chamber. The static magnetic field has a known amplitude distribution. At least one radio frequency antenna is configured to induce a radio frequency magnetic field in the sample chamber at a predetermined frequency and a predetermines bandwidth. The static magnetic field amplitude at a sample chamber boundary has substantially at most two values.

Abstract: A nuclear magnetic resonance (NMR) apparatus includes at least one magnet configured to induce a static magnetic field in a sample chamber. At least one radio frequency antenna is configured to induce a radio frequency magnetic field in the sample chamber. A surface of a material sample disposed in the sample chamber and an interface with the sample chamber to the material sample volume ratio is selected such that NMR phenomena induced in the material sample depend substantially entirely on the material sample to sample chamber interface effects.

Abstract: A nuclear magnetic resonance (NMR) apparatus includes at least one solenoid configured to induce a radio frequency magnetic field in a sample. The sample is located inside the solenoid. At least one cylindrical magnet is arranged to induce a static magnetic field in the sample, wherein the magnet is located inside the sample.

Abstract: A method is disclosed for analyzing composition of a body part from nuclear magnetic resonance measurements made on the body part. The method includes exciting a predetermined sequence of nuclear magnetic resonance phenomena in the body part and measuring nuclear magnetic resonance signals from the body part. At least a part of the measured signals are composed into a measurement vector. The mass of the at least one constituent is determined as a predetermined function of the measurement vector. The predetermined function represents the at least one constituent and defines a standard for a range of at least one of compositional variations and temperature variations of the at least one constituent.

Abstract: A method is disclosed for measuring whole body composition. The method includes confining movement of the body to a selected volume, inducing a static magnetic field in the volume, inducing a pulsed radio frequency magnetic field in the volume, and receiving nuclear magnetic resonance signals from the body. The resonance signals from any part of the body are substantially independent of a position of the body part within the volume. Whole body composition is assessed from the resonance signals.

Abstract: A method for hazardous liquid detection within a container includes inducing a static magnetic field in the container, inducing a radio frequency magnetic field in the container at a frequency selected to excite nuclear magnetic resonance phenomena in liquids; detecting nuclear magnetic resonance signals from the container and analyzing the signals for presence of liquids above a threshold mass.

Abstract: A method is disclosed for analyzing body composition. The method includes inducing a static magnetic field in the body. The static magnetic field has a known distribution along a longitudinal axis of the body. A radio frequency magnetic field is induced in the body. The radio frequency and a bandwidth thereof are selected to induce nuclear magnetic resonance phenomena in a selected axial segment along the body. Nuclear magnetic resonance phenomena are from the selected axial segment. Composition is determined from the magnetic resonance signals. The measurement may be repeated in different axial segments by changing the static field amplitude or a frequency of the RF magnetic field. In some embodiments, a gradient field is superimposed over the static field.

Abstract: A method for analyzing composition of a human body includes inducing a substantially homogeneous static magnetic field in the entire body. A substantially homogeneous radio frequency magnetic field is induced in the entire body so as to induce nuclear magnetic resonance effects in the body. Nuclear magnetic resonance signals emanating from the entire body are analyzed to determine body composition.

Abstract: An apparatus for measuring conductivity of earth formations penetrated by a wellbore including a magnet for inducing a static magnetic field in the earth formations penetrated by the wellbore. The apparatus includes means for generating a radio frequency magnetic field in the wellbore and the earth formations, means for selectively varying a frequency of the radio frequency magnetic field, and means for receiving a nuclear magnetic resonance signal from excited nuclei in the earth formations. The means for receiving includes means for measuring a difference in phase between the magnetic resonance signal and the radio frequency magnetic field. The phase difference measured is related to the conductivity of the earth formations.