Gradient sub system
Gradient sub system directly determines the spatial encoding of MRI
system, it produces the signal information, at the same time it can
perform GR series sequence scanning, it is the foundation of MRI
system’s spatial resolution ability, gradient sub system also
directly affect the scanning image thin slice scanning.
The linearity of gradient system of MRI system determine the
accuracy of spatial location information, ensuring that in any
acquisition, the image distortion is limited.
Gradient switching rate is an important factor of MRI scanning
speed. Bstar-300 using the self-shielding gradient coil and high
duty cycle gradient amplifier system, together with eddy
elimination technology and design, can avoid the eddy current
between the metal shielding layers, raise up the spatial encoding
ability of the magnetic resonance signal and make the scan more
precise, ensure high resolution image quality.
During superconducting MRI scans, the noise is much bigger, and
staying in a closed environment, the patient is easy to fall into
tension. Bstar-300’s gradient sub system adopts special hardware
noise reduction design technology, the gradient noise is reduced to
2/3, provide patients with friendly scanning environment.
The gradient system is equipped with automatic detection function,
if the temperature is too high, the system can intelligently stop
the scanning, to protection of hardware from being damaged.
The system uses water chiller to produce a stable running
condition.
Magnet sub system
- Bstar-300 adapts advanced active shielding superconducting magnet,
has the following features,
- the magnetic field uniformity is excellent;
- good magnetic field stability;
- config with “zero liquid helium consumption” technology, the liquid
helium refill time interval is more than 4 years
RF sub system
The RF sub system is the source of MRI proton excitation energy,
its efficiency directly affects the MRI relax signal. RF receiver
receive MRI relax signal, a good receiving coil can improve the SNR
of image.
The RF sub system is similar as highway lane, the more lanes, the
faster flow of vehicles. Vice versa, the more the RF system
channels, the faster parallel acquisition, thus the system can
process the greater the amount of data in the same time, reduce the
imaging time. Bstar-300 uses 16/32 channel radio frequency
receiving, combined with the latest parallel sampling technology,
using the DDC digital direct sampling, can short the scan time and
get excellent image quality.
