JPH01303139A - Magnetic resonance imaging device - Google Patents

Abstract

PURPOSE:To prevent the extension of a drop tube and the invasion of a noise from the drop tube by providing a drop tube introducing groove at a gantry opening part and surrounding a drop container and the drop tube with an electric seal material connected electrically with an electromagnetic shield cylinder. CONSTITUTION:A drop tube introducing groove 5 is arranged at the contact of a gantry opening part 2 and a bed 4, then a cover 7 composed of an electric shield material is fitted at the drop tube introducing groove 5 and fixed by an interlocking device 8. A drop container and a drop tube are arranged in a drop tool housing device 6 composed of an electric shield material arrange or combined to a main magnet 1. The drop introducing groove 5 and the drop tool housing device 6 are electrically connected with an electromagnetic shield cylinder 3, etc., to constitute the self-shield structure of the photographing part and the shield structure unified by the whole of an MRI device photographing part is constituted. Consequently, since the noise is interrupted from the internal area, the invasion of the noise to communicate the drop tool does not occur.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention relates to a magnetic resonance imaging apparatus (hereinafter referred to as MR
In particular, this invention relates to an improvement in MRI that enables the use of IV infusion patients as subjects.

(Prior Art) As is well known, an MHI device detects a weak nuclear magnetic resonance signal (hereinafter referred to as an NMR signal) induced by applying a frequency magnetic field for excitation to a living body placed in a static magnetic field. , by performing image reconstruction processing on this, for example, C
The tomographic image is displayed on the RT. This NMR
The frequency of the signal generally takes a value of 6 to 85 MHz, but since this frequency band overlaps with that of radio waves generated from surrounding electrical equipment, these radio waves must be removed as interfering radio waves (hereinafter referred to as noise). Conventionally, this noise has been removed by using a shield room method, in which the entire imaging area of the MRI apparatus is isolated in a separate room with a shield wall, but this method has economical problems such as increased manufacturing costs and increased installation space. there were. Therefore, as a measure to improve this situation, a self-shielding method has been proposed in which a shield structure is built into the main body of the imaging section of the MRT device.

(Problem to be solved by the invention) In an MRI apparatus, when a patient who requires an intravenous drip is used as the subject, there is no problem with the shield room method, but in the case of the self-shield method, the cavity of the air-core main magnet first A movable electromagnetic shield tube was installed inside the gantry (hereinafter referred to as part of the gantry), and the drip tube had to be placed around the opening of the electromagnetic shield tube. Furthermore, since the drip is made of electrolyte, there is a problem in that when it is guided from outside the shield structure, noise is introduced through the drip.

The present invention was made in view of the above problems, and when using an IV patient as a subject in self-shield MRI, it is possible to prevent the extension of the IV tube and the intrusion of noise from the IV tube. The purpose is to provide MRI equipment.

[Configuration of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention has a configuration in which an intravenous drip tube is installed in the gantry opening. In addition, the drip container and the drip tube were surrounded by an electrical shielding material that was electrically connected to an electromagnetic shield tube housed in a part of the gantry.

(Function) In the MRI apparatus to which the present invention is applied, the above-described configuration allows the drip tube to be introduced through the gantry opening, eliminating the need for unnecessary extension. In addition, the drip container and drip tube are integrated with the shield structure built into the imaging section body to form a shield structure. l Since it is housed within the electrical shielding material, noise is prevented from entering through this material.

(Example) FIG. 1 is a schematic view of the shadow part of an MRI neck device to which the present invention is applied, and FIG. 2 is an enlarged view of the drip tube introduction groove.

In this embodiment, the gantry opening 2 and the bed 4
Install the drip tube introduction groove 5 at the contact point. A lid 7 made of an electrical shielding material is removed from the drip tube introduction 'A5 after the drip duplex is attached (=1) and fixed by an interlock device 8. It is placed in an intravenous device storage device 6 made of an electrical shielding material installed or incorporated in the device.This intravenous device storage device 6 has a part made of gold steel or the like that can be seen through so that point W4 can be observed. composition.

The drip introduction groove 5 and the drip tool storage container 6 are electrically connected to the electromagnetic shield tube 3 and the like that constitute the self-shielding structure of the imaging section, thereby creating a self-shielding structure integrated into the entire MRI imaging body. Composition Jru.

As described above, in the MRI apparatus to which one embodiment of the present invention is applied, the drip tube is disposed through the drip tube introduction groove 5, so unnecessary extension is not necessary.

In addition, the drip tube introduction groove 5 and the drip equipment storage device 6 are
Since it constitutes a self-shielding structure integrated with the electromagnetic shielding tube 3 and the like and shields noise from its internal area, noise does not enter through the dripping equipment that is completely stored in the dripping equipment storage container 6. do not have.

For these reasons, MRI to which an embodiment of the present invention is applied
With the device, even when the subject is an infusion patient, MRI@imaging can be easily performed in the same manner as in other cases.
It is excellent in terms of operability in clinical settings.

Note that 9 in FIG. 2 represents a slide rail for the electromagnetic shield cylinder 3.

[Effects of the Invention] As explained above, in the MHI device to which the present invention is applied, the infusion tube is placed through the tube introduction groove installed at the gantry opening, so there is no need for unnecessary extension of the tube. .

Further, since the drip container and the drip tube are completely housed within the electrical shielding material that constitutes the shield structure integrated with the electromagnetic shield tube, etc., there is no intrusion of noise through them.

As a result, the MRI apparatus to which the present invention is applied can easily diagnose IV patients while employing a self-shielding method, and improves operability as a medical diagnostic apparatus in a clinical setting.

[Brief explanation of the drawing]

FIG. 1 is a schematic view of an imaging section of an MRI apparatus to which the present invention is applied, and FIG. 2 is an enlarged view of an infusion tube introduction groove. 1... Main magnet 2... Gantry opening 3... Electromagnetic shield tube 4... Bed 5...
Intravenous tube introduction groove 6... Intravenous equipment storage 7...
・Drip tube introduction groove lid 8...interlock device

Claims (2)

[Claims] (1) A magnetic resonance imaging device characterized in that an air-core main magnet for generating a static magnetic field, which is housed in an electromagnetic shield tube, has an opening for introducing a drip tube into the cavity opening thereof. (2) A drip tube arranged along the drip tube introduction groove and a drip container connected to the drip tube,
A magnetic resonance imaging apparatus characterized in that the magnetic resonance imaging apparatus is surrounded by an electric shield material electrically connected to the electromagnetic shield tube.