Abstract: The present invention relates to a buggy comprising a frame on which a carrier for a child can be placed, wherein the frame comprises front and rear wheels, a push and pull handle with a right-hand push/pull bar and a left-hand push/pull bar, a right-hand and a left-hand front wheel bar which supports said front wheels, a right-hand and a left-hand rear wheel bar which supports said rear wheels, a right-hand and a left-hand supporting pin for supporting the carrier, a right-hand coupling member to which the right-hand front wheel bar is fixed via a right-hand front wheel bar disc, the right-hand rear wheel bar is fixed via a right-hand rear wheel bar disc, and the right-hand push/pull bar and the right-hand supporting pin are fixed, in such a way that the right-hand front wheel bar disc and the right-hand rear wheel bar disc can be turned relative to one another about a pivot axis that runs essentially transversely to the front wheel bars, the rear wheel bars, the push/pull bars and the supporting pins, and a

Abstract: A high-sensitivity acquisition involves a (dynamic) steady-state that is achieved by repetitive applying flip angles with the same sign. Read-out of the magnetic resonance signals is done in the form of gradient echoes that are generated by applying temporary magnetic gradient fields. Preferably, all gradients are completely compensated for Accordingly, a so-called Rephased Fast-Field Echo (R-FFE) sequence employed as the high-sensitivity acquisition sequence. It appears that a high-sensitivity is achieved when a flip angle in the range from 3° to 15° is employed. High-sensitivity is achieved for very low concentrations of contrast agent in a range suitable for molecular imaging.

Abstract: A novel method is described for simulation of an electric stimulation of the nerve system subject to the rate of change of gradient fields. A gradient signal is filtered and a stimulation signal is derived, which is compared with a predetermined stimulation threshold value. An indicator signal is generated if the threshold value is exceeded. Therefore the time dependent and spatially dependent electric fields as defined by the scanning sequence and the gradient coil properties are calculated. A vector combination of said calculated electric field components from each gradient coil axis is performed, which results in a temporal diagram of the total electric field at various spatial locations within the gradient coil. The stimulation probability at each location from said temporal diagram and said stimulation signal is then calculated, and said stimulation probability is compared with the stimulation threshold value at each location within the gradient coil.

Abstract: An MRI method is proposed where the profile distribution is automatically determined so that the information contents of the image are maximum, subject to the restriction that the total number of profiles used to obtain the image is predetermined. During the determination of the profile distribution, profiles will be selected which have a minium redundancy and a redundancy pattern r(k.sub.y) will be dynamically adapted as a function of the spatial frequency k.sub.y. The redundancy of a profile increases as the number of times that a profile has been measured increases and is high when a signal-to-noise ratio associated with the profile is very small.

Abstract: A radiation conversion screen having sub-layers with mutually different radiation-conversion, radiation-optical and/or technological properties wherein successive sub-layers of luminescent material have a luminescent radiation absorption which decreases in the propagation direction of the radiation beam.