Abstract: In a parallel or SENSE imaging technique in an MRI system (40), a calibration scan is conducted to generate a calibration image (86) indicative of sensitivity profiles of parallel imaging coils (76a, . . . , 76n) also in the regions where the magnetic field is distorted. This is accomplished by using a phase refocusing imaging protocol such as a spin echo technique, or by using a gradient echo technique where the echo time is very short. In addition, the phase encode direction of the calibration scan and a diagnostic imaging scan shall be matched. A diagnostic imaging scan is conducted using a diagnostic scan protocol to generate a diagnostic image representation from each parallel imaging coil. A SENSE processor (90) reconstructs a final diagnostic image (92) from the diagnostic image representations and the coil sensitivity profiles.

Abstract: The invention relates to a method for the examination of an object, such as a human body, an animal or the trunk of a tree, on the basis of NMR phenomenon and magnetic resonance imaging techniques, said method including a preparatory section and a signal pick-up section. Said preparatory section comprises the actions for producing a spin inversion and the actions for off-resonance radiation.

Abstract: The invention relates to a coil arrangement intended for an NMR testing apparatus for collecting NMR information about a target to be examined, said arrangement comprising first coil means (2) for exciting the nuclei of a target area and for receiving a signal emitted by the nuclei of a target area. The arrangement further includes second coil means (6) for gaining the amplitude of a signal emitted by a limited section of a target and connected to said first coil means, said gain being in proportion to the amplitude of a signal connecting from another section of a target. This is a way of improving the ratio of a signal connecting to said first coil means (2) from said limited section of a target to the electric noise created in the signal collection unit and in a target. The invention can be preferably applied to NMR imaging units which, in addition to mapping the entire body, can be used for the examination of smaller subdomains, such as the eye, ear, limbs etc.