Abstract: A method includes determining a heart beat signal during acquisition of MR images obtained at a plurality of cardiac cycles; determining at least one physiological parameter of a heart obtained at the plurality of cardiac cycles; determining a model including, determining, in each of the cardiac cycles, a variable time interval of variable duration and at least one additional time interval based on the heart beat signal and the at least one physiological parameter, the at least one additional time interval having a lower variability in duration than the variable time interval; determining a duration of the variable time interval and a duration of the cardiac cycle for each of the cardiac cycles based on the heart beat signal and the at least one physiological parameter; and assigning the MR images to the different cardiac phases based on the variable time interval and each of the cardiac cycles.

Abstract: A method for adapting, per cardiac cycle, the parameters governing interpolation of varying and non-interpolation of fixed fractions of each individual cardiac cycle is provided. A time series of data values associated with a cardiac cycle is received, and the time series is scaled to a reference cardiac cycle, wherein the scaling includes applying a model to the time series to generate a scaled time series of data values associated with the first cardiac cycle. The model is trained using the scaled time series.

Abstract: Systems and techniques for imagining samples including components with small values of T2. Optionally, the systems and techniques may provide (for example) suppression of unwanted signals, enhanced contrast, and artifact control in imaging samples with small values of T2.

Abstract: Systems and techniques for imagining samples including components with small values of T2. Optionally, the systems and techniques may provide (for example) suppression of unwanted signals, enhanced contrast, and artifact control in imaging samples with small values of T2.

Abstract: In Magnetic Resonance Imaging Apparatus, it is necessary to switch the radio frequency electric coils which are positioned around the patient in the imaging volume very rapidly. The present invention achieves such switching using switching devices which are sensitive to control signals other than electrical signals. This removes the need to pass additional electrical conductors, which could carry interfering signals, into the imaging volume and this reduces image degradation. In particular the switching devices may be photodiodes which function in response to optical signals carried by optical fibres.

Abstract: In magnetic resonance imaging machines the gradient coils which generate fast changing magnetic fields vibrate and generate considerable levels of sound. In this invention the vibration of the gradient coils is utilized to generate sounds to communicate with a patient in the machine. The sounds may originate from an operator via a microphone, or may be computer generated.