VERY HIGH SPEED PHOTOGRAPHIC METHOD FOR MRI PART AREA AND MAGNETIC RESONANCE DIAGNOSTIC DEVICE BASED THEREON

摘要

PURPOSE:To execute the photographing at a very high speed even in the case of the present product and a device formed by improving it to some extent by limiting a photographing area in order to execute photographing at a very high speed, and determining it by a performance of a device for executing the photographing and the very high speed photographing sequence. CONSTITUTION:By using a conventional technique, a slice selection is executed by a 90 deg. pulse, and by a 180 deg. pulse, a slice being orthogonal to the slice selection surface of a 90 deg. pulse is subjected selectively to phase inversion. In this case, the part in which a selection area 101 by the 90 deg. pulse and a selection area 102 by the 180 deg. pulse cross each other becomes a photographing area. Therefore, sizes of the selection area 101 by the 90 deg. pulse and the selection area 102 by the 180 deg. pulse are selected so that its photographing area becomes a photographable area determined from the performance of its device and the photographing sequence. Its crossing part becomes a partial, area 103 which can be photographed at a very high speed, and its part is photographed at a very high speed. The method for very high speed photographing is proposed variously by a conventional technique.