Hitachi Medical Corporation

Katsunori Suzuki

Shigeru Sato

Yo Taniguchi

Etsuji Yamamoto

Shigeru Watanabe

Ryuzaburo Takeda

Kenji Takiguchi

Tsuneo Maeda

Motonari Nasuhara

Shoji Kondo

Imaging and image reconstruction are sequentially performed for slices of a subject, and realtime images of the slices are displayed substantially at the same time. The slices may be perpendicular or parallel to one another, or they may form a stereoscopic pair. The images may be displayed two-dimensionally, or they may be combined and displayed three-dimensionally. One of the slices includes an insertion (a needle) for puncture or biopsy that is inserted into the subject by an operator, and it is parallel with a direction in which the insertion should advance. If the needle is displaced from the slice and a shade of the needle disappears from the sequentially-displayed images of the slice while the operator moves the needle toward an affected part in the subject in IVR, the shade of the needle appears on the sequentially-displayed images of another slice that is perpendicularly intersecting to or is adjacent and parallel to the above-mentioned slice. Hence, the operator can always determine the position and advancing direction of the needle.

MR fluoroscopy method and apparatus

A bolus of magnetized blood is formed by at least two radio frequency magnetic fields, and readout gradient magnetic fields are repeatedly applied at a proportion of 1:-2:1 along a blood vessel so as to continuously obtain a first echo signal whose phase change due to velocity is corrected, from the moving bolus. This first echo signal provides velocity information on the blood stream. The sequence of the readout gradient magnetic fields is repeatedly applied at a proportion of (.sqroot.2-1):-2:2:-(.sqroot.2-1) so as to continuously obtain a second echo signal whose phase change due to velocity and acceleration is corrected, from the moving bolus. Acceleration information of the blood stream is extracted by calculating the difference between the first echo signal and the second echo signal. The velocity information and/or the acceleration information is displayed in superposition with a specific blood vessel of an angiogram shot in advance.

Fluid measurement method using nuclear magnetic resonance imaging and

A first sectional image corresponding to a first section of an object to be examined is displayed on a screen of a display device. A position of a first line on the first sectional image is designated. First data corresponding to a distance between the first line and a center of the screen is obtained. A second sectional image corresponding to a second section of the object is displayed on the screen. The second section crosses the first section on a line on the first section corresponding to the position of the first line. A position of a second line on the second sectional image is designated. A position of a first point contained in the position of the second line is designated. Second data corresponding to a component in the direction of the second line is obtained. The component is a component of the distance between the first point and the center of the screen. A third sectional image corresponding to a third section of the object, is displayed on the screen on the basis of the first and second data in such a way that a point on the third sectional image corresponding to a point on the third section. The third section crosses the second section on a line on the second section corresponding to the position of the second line. The point on the third section is specified by both of the first line and the first point is displayed at a substantial center of the screen.

Magnetic resonance imaging method and apparatus

Method and apparatus of stabilizing uniformity of a static magnetic field in a magnetic resonance imaging apparatus, wherein before adjustment of uniformity of the static magnetic field and before each actual imaging operation, pulse-like gradient magnetic fields are applied to a static magnetic field generating magnetic circuit at a maximum output level of power supplies for generation of gradient magnetic fields so as to magnetize the static magnetic field generating magnetic circuit to constant magnetization intensity.

Growing community of inventors

Kashiwa, Japan

Katsunori Suzuki