The crystal of the latest technologies from Hitachi of “Open-MRI”, the new generation high filed open MRI has come into the world.
Free posture imaging
It is an imaging system open to everybody.
For instance, an examinee with strong build,
an aged who cannot lie down flat,
and a child.
To be open to many people and offer images necessary for diagnosis,
High-field open MRI OASIS has pursued
“new possibilities”.
The answer is Free Style -Playing magnet imaging- .
The offset pillar which is the feature of gantry design allows effective use of the open space by arranging the position of the pillars asymmetrically from left to right. .
Using a large joint coil also in head imaging allows imaging with the examinee in relaxed recumbent posture.
Even in case of the bent examinee difficult to lie down flat, using a loose flexible body coil allows imaging with the examinee in free posture.
The open gantry with a wide gap and a wide table facilitates imaging of examinees with strong build difficult for imaging with conventional MRI.
T/R body coil incorporated in the gantry allows imaging without wearing the receiver coil. It enables imaging with extremely high degree of freedom and many clinical applications such as a kinematic study are expected.
OASIS ∼ Fusion of a Superconductive magnet and Open design ∼
··· and high-sensitivity coils
The solenoid receiver coil of the vertical magnetic field system allows high sensitivity imaging of the important center area.
The receiver coil for vertical magnetic field which Hitachi has developed originally makes it its feature that the sensitivity is high at the center area which is important within a clinical image.
Also, the sensitivity uniformity is good enough and the diameter can be made smaller for fitting better to the examinee with expectation for further sensitivity improvement.
The receiver coil of the vertical magnetic field system features its high sensitivity as compared with the horizontal magnetic field system. Particularly, high sensitivity at the center area which is important in clinical images allows providing images with a good SN ratio.
The solenoid receiver coil has high uniformity and the halation in the neighborhood of the coil which is frequent with the multi-array receiver coil of the horizontal magnetic field system is diminished. Especially signals of fat tissues on the body surface are hard to be strong, so it is advantageous to fat suppression.
Hitachi's parallel imaging technology “RAPID” is incorporated. Since the RAPID coil based on the solenoid receiver coil has high sensitivity and a high degree of freedom in the imaging direction, imaging time is shortened effectively.
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