Browse Prior Art Database

COOLING TECHNIQUE FOR MAGNETIC RESONANCE IMAGING (MRI) SYSTEMS

IP.com Disclosure Number: IPCOM000242189D
Publication Date: 2015-Jun-24
Document File: 4 page(s) / 124K

Publishing Venue

The IP.com Prior Art Database

Abstract

This disclosure provides a cooling technique for a Magnetic Resonance Imaging (MRI) system. The cooling system uses a single pump with two 3-way control valves, a 3-way valve 1 and a 3-way valve 2. The 3-way valve 2 and a heat exchanger 2 (HEX 2) control water temperature at a first temperature T1 for a gradient amplifier or radio frequency (RF) amplifier. Similarly, the 3-way valve 1 and a heat exchanger 1 (HEX 1) control the water temperature at a second temperature T2 for a gradient coil and/or a cryogen compressor. The first temperature T1 is higher than the second temperature T2, so as to save energy for air conditioning inside equipment room or machine room. The cooling technique, described herein utilizes only one pump to achieve different water temperatures in the MRI system.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 53% of the total text.

COOLING TECHNIQUE FOR MAGNETIC RESONANCE IMAGING (MRI) SYSTEMS

BACKGROUND

The present disclosure relates generally to magnetic resonance imaging (MRI) systems, and more particularly to a cooling technique for an MRI system.

Water is generally circulated as a coolant to cool components in high field MRI systems, such as a gradient coil inside magnet or scan room, a gradient amplifier or radio frequency (RF) amplifier and a cryogen compressor inside equipment or machine room. 

Further, to save energy used for air conditioning, ambient temperature inside the equipment or machine room is higher. In order to prevent condensation issues, a first water temperature T1 inside the equipment or machine room cannot be lower than a second water temperature T2 inside magnet or scan room.  However, the second temperature T2 is required to be low because of specific absorption rate (SAR) limit.

Figure 1 is a schematic diagram of a cooling system according to a conventional technique. 

The conventional technique utilizes two separate pumps installed across two cooling loops.  Further, the conventional technique generates a first temperature T1 (30 Deg. C,for example) and water at the temperature T1 is supplied to the RF amplifier or the gradient amplifier inside equipment room.  Further, the conventional technique generates a second temperature T2 (20 Deg. C, for example) and the water at the temperature T2 is supplied to the gradient coil and the cryogen compressor. 

Figure 1

The conventional technique suffers from frequent pump failures and thereby offers poor reliability.  Further, the conventional technique have bigger space requirement to accommodate multiple pumps.   As a result, the conventional techniques are not cost effective and suffer from reliability. 

It would be desirable to have an improved cooling technique for the MRI system.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 is a schematic diagram of a cooling system according to a conventional technique.

Figure 2 is a schematic diagram of a cooling system according to an embodiment of the present invention.  

DETAILED DESCRIPTION

This disclosure provides a cooling technique for a Magnetic Resonance Imaging (MRI) system.  The technique utilizes a single pump to achieve different water temperatures for cooling components of the MRI system.

Figure 2 is a schematic diagram of a cooling system according to an embodiment of the present invention.  The cooling system uses two 3-way control valves, a 3-way valve 1 and 3-way valve 2.  The 3-way valve 2 and a heat exchanger 2 (HEX 2) control water temperature at a first temperature T1 for a gradient or radio frequency (RF) amplifier.  Similarly, the 3-way valve 1 and a heat exchanger 1 (HEX 1) control the water temperature at a second temperature T2 for a gradient coil and a c...