A TECHNIQUE TO PROVIDE AIR FLOW TO MAGNETIC RESONANCE IMAGING SCAN ROOM
Publication Date: 2014-Nov-25
The IP.com Prior Art Database
The present invention proposes a technique to provide airflow for cooling in a magnetic resonance imaging (MRI) scan room. The technique includes a cold head structure with a motor to provide rotational motion to a mechanical structure. One pulley is mounted on the cold head motor to transfer rotational motion to the mechanical structure.The mechanical structure changes rotational motion to linear motion. The mechanical structure includes a shaft, a bear, a pulley, a blower, a blade and a cavity.
FIELD OF INVENTION
The invention generally relates to amagnetic resonance imaging (MRI) scan room and more particularly to a technique for providing airflow to the MRI scan room.
BACKGROUND OF THE INVENTION
In a magnetic resonance imaging (MRI) scan room three areas require air cooling. Airflow is required for a gradient coil and body coil surface. This allows meeting international electro-technical commission (IEC) requirement, which is about 410C surface temperature limit and specific absorption rate (SAR) limit. Airflow also provides cool air to make thepatient comfortable. Airflow or forced air is required for cooling of some EE modules at the magnet side. There is a strong magnetic field in MR scan room, which require a fan and blower. The fan and blower are not allowed to attach to magnet to avoid human injury. Current design includes installing a blower far away from the magnet and air is transferred to magnet side using a large hose. The hose occupies large space for routing, which increases the size of the magnet enclosure. The blower requires large power due to long distance hose and high airflow impedance.
A conventional technique includes an apparatus to provide forced airflow to a surface of the gradient coil. Another conventional technique includes an armature coil wound without core formed in shape of a saddle and an outside rotor magnet formed by a permanent magnet for air cooling. However, the conventional techniques are not efficient to provide airflow for cooling in the MRI scan room.
It would be desirable to have an efficient technique to provide airflow for cooling in the MRI scan room.
BRIEF DESCRIPTION OF THE INVENTION
The present invention proposes a technique to provide airflow for cooling in a magnetic resonance imaging (MRI) scan room. The technique includes a cold head structure with a motor to provide rotational motion to a mechanical structu...