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LOW HEIGHT MRI PATIENT TABLE

IP.com Disclosure Number: IPCOM000223229D
Publication Date: 2012-Nov-12
Document File: 9 page(s) / 1M

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention discloses a low height patient table to support patient for MRI scanning procedure. The low height patient table comprises features which enable lowest retracted height of 400 mm or less than 400 mm from ground level. The features involve a hydraulic actuator, a bell crank lever attached with hydraulic actuator at one end and to the other end attached with a scissor structure. The low height table with a retracted height of 400mm or less than 400 mm is achieved by a technique which employs relocating the conventional positioning of hydraulic actuator from patient table to a front end (fascia) of the magnet. Subsequently, scissor mechanism on the table top is coupled to the hydraulic actuator using a bell crank lever.

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LOW HEIGHT MRI PATIENT TABLE

FIELD OF INVENTION

The present invention relates generally to magnetic resonance imaging (MRI) patient table, and more particularly to a low height patient table to support patient for MRI scanning procedure.

BACKGROUND OF THE INVENTION

A regular patient table used in a magnetic resonance imaging (MRI) scanning procedure involves a retracted height of 685 mm from ground level. The patient table generally comprises hydraulic actuators placed in inclined orientation with horizontal, typically, 35-40 degrees in conjunction with a supporting structure like scissor mechanism. In such actuator configuration, load applied is not fully utilized in lifting a patient weight. A considerable horizontal component of the actuator force is not directed towards lifting the patient load.

The load is directly taken by the scissor structure of the table. As the low height of the table reduces, the actuator inclination with respect to horizontal at lowest position of the table reduces. As the actuator inclination with respect to horizontal reduces, horizontal force component of the actuator which does not participate in lifting of the table increases considerably. As a result, a very large size actuator is required in the patient table. Also, the scissor assembly is required to be structurally strong enough to transfer entire force applied by the actuator to table top.

A conventional patient table is a signa-light table. The signa-light table achieves a maximum retracted height of 490mm. Such a low height is achieved by using a technique which employs higher load lifting hydraulic actuator. The higher load lifting hydraulic actuator is placed in an inclined position. Further, the hydraulic actuator is connected to a scissor assembly. However, the technique used in signa-light table has limitation in retracting table height. The technique is unable to further reduce on retracted height of patient table.

It would be desirable to have a low height patient table with technique to reduce retracted height of the patient table used in an MRI scanning procedure.

BRIEF DESCRIPTION OF THE INVENTION

The invention discloses a low height patient table to support patient for MRI scanning procedure. The low height table with a retracted height of 400 mm or less than 400 mm from ground level is achieved by a technique which employs relocating the conventional positioning of hydraulic actuator from patient table to a front end (fascia) of the magnet. Subsequently, scissor mechanism on the table top is coupled to the hydraulic actuator using a bell crank lever.

DETAILED DESCRIPTION OF THE INVENTION

The present invention could generally apply to magnetic resonance imaging (MRI) patient table. The present invention could particularly apply to a low height patient table to support patient for MRI scanning procedure. The low height patient table comprises features which enable lowest retracted height of 400 mm or less than 400 mm from ground level. The fe...