JPH01249043A - Local part photographing probe device - Google Patents

Abstract

PURPOSE:To facilitate the mounting to a knee or the like and the alignment of the center part of a probe device to the center part of a photographing area by providing a base bed part formed into a flat plate shape and a coil supporting part supporting a high frequency (RF) coil so as to cross with the base bed part on this base bed part. CONSTITUTION:A base bed part 5 is formed into a flat plate shape, and a coil supporting part 4 supports an RF coil 6, formed into a circular shape, so as to cross at a right angle with the base bed part 5. In case of photographing a knee, a probe device, which is mounted so as to interpose the coil supporting part 4 (RF coil 6) by both the knees 1, can be easily mounted to the knee 1. While by the mounting method thus obtained, the probe device enables its center part to be easily aligned to the center part in a photographing area, thus both the knee parts can be simultaneously photographed. Further in this probe device, after it is mounted, because a detected body P enables the knee to be freely bent and extended, photographing in a condition bending the knee and in a condition extending it can be easily further promptly performed.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to magnetic resonance (MR)
onance) phenomenon of the subject (usually a patient).
The present invention relates to a local imaging probe device used for local imaging of a subject in a magnetic resonance imaging apparatus (referred to as an MRI apparatus) that obtains an R image.

(Prior art) An MRI apparatus applies a -like static magnetic field to a desired part of a subject, and transmits RF (high frequency) waves in a direction perpendicular to this static magnetic field.
A transmitting RF coil that generates a magnetic field causes the MR phenomenon to occur only in a specific slice part from which a tomographic image is obtained, and is roughly detected by an RF coil for receiving an MR multiplied signal generated from the atomic nucleus after the RF magnetic field is released. In this method, a linear magnetic field gradient having a linear slope is applied to the static magnetic field (a coordinate system rotated by θ° from the X axis in the X' axis direction) to obtain a composite MR multiplied signal, and this signal is Fourier transformed. An MR image can be formed by this.

Incidentally, in such an MRI apparatus, there are cases where local modeling of a subject's knee or the like is performed. In this case, in order to collect MR multiplied signals from a local area of the subject with high sensitivity, a probe device dedicated to local imaging is used as the above-mentioned receiving RF coil.

For example, when performing an Iri image on the knee of a subject, the cylindrical probe device 2 is formed into a substantially cylindrical shape as shown in FIG. The knee 1 of the subject P is surrounded by the shaped probe device 3, and the MR multiplied signal from the knee 1 is detected by the RF coil provided in the probe.

(Problems to be Solved by the Invention) However, in the conventional devices shown in FIGS. 8 and 9, since the device is attached so as to surround one knee 1 of the subject P, the center of the imitation shape in the MRI device is Probe devices 2 and 3 are installed in the
It is difficult to align the center of the In addition, in the case of knee imitation, it is necessary to imitate both states of the knee in order to compare the bent state and the extended state, but with the conventional device, since it is worn so as to surround the knee 1, I have difficulty bending and straightening my knees. Furthermore, since it has to be worn so as to surround the knee 1, it is quite cumbersome to wear it.

SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned drawbacks, and its purpose is to make it easy to mount the probe device on an Ill, etc., and to easily align the center of the probe device with the center of the copy area. Furthermore, it is necessary to provide a local imaging probe device that allows the knee to be easily bent and straightened after being attached.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a probe for local imaging, which includes an RF coil capable of detecting an MR multiplied signal from a subject, and enables a local 1-lit shadow of the subject. The device includes a base portion formed in a flat plate shape, and a coil support portion that supports the RF coil so as to cross the base portion on the base portion.

(Function) For example, in local knee imitation, the coil support portion is worn between both knees. This installation is much easier than wrapping around the knee as with conventional devices. Further, with such mounting, the center of the probe device can be easily aligned with the center of the eye shadow area, and both knees can be made into a tail shape at the same time. Furthermore, since it does not surround the knee like conventional devices, it is easy to bend and straighten the knee even after wearing it.

(Example) Hereinafter, the present invention will be specifically explained with reference to Examples.

FIG. 1 shows an embodiment of a local imaging probe device according to the present invention.

In the same figure, 5 is a base portion formed in a flat plate shape,
4 is a coil support part. The coil support section 4 supports an RF coil (surface coil) 6 formed in a circular shape so as to be perpendicular to the base section 5 . That is, this probe device is formed into an inverted T-shape by the coil support section 4 that supports the RF coil 6 and the base section 5.

The coil support portion 4 and the base portion 5 are made of a non-magnetic and non-conductive material such as acrylic. The RF coil 6 may be fixed to one surface of the coil support section 4, or may be molded with acrylic that forms the coil support section 4.

FIG. 2 shows the sensitivity distribution of the device of this embodiment, and FIG. 3 shows the state of use.

As shown in FIG.
, 8 directions).

Therefore, as shown in FIG. 3, when the probe device is worn so that the coil support part 4 is held between both knees 1, the center of the probe device becomes the center of the tracing area, and as shown in FIG. It is possible to obtain 1q of MR images of both knees at the same time.

In this way, in this embodiment, the probe device is mounted so that the coil support part 4 (RF coil 6) is sandwiched between both knees 1 during knee imitation, and the probe device is mounted so that the coil support part 4 (RF coil 6) is sandwiched between both knees 1. Since it is not worn so as to surround the knee 1 as shown in Figure 1, it can be easily attached to the knee 1111. Further, with such mounting, the center of the probe device can be easily aligned with the center of Ogata Castle, and thereby both knees can be imaged at the same time. Furthermore, after wearing this probe device, the subject P can freely bend and straighten the knee, so it is possible to easily and quickly change the shape of the knee with the knee bent and the tail shape with the knee stretched out. can be done.

Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the above-mentioned embodiment, and that various modifications are possible.

As shown in FIGS. 5 and 6, a mat member 10.11 may be provided on the base 5 to help bend and extend the knee, and as shown in FIG. A belt 12,13 may be provided by which the knee 1 can be fixed.

In the above embodiment, the knee imitation of the subject P was explained, but it is also extremely effective for imaging various parts of the leg other than the knee.

[Effects of the Invention] As detailed above, according to the present invention, it is easy to attach the probe device to the knee, etc., the center of the probe device can be easily aligned with the center of the oka shadow region, and further, It is possible to provide a probe device for local imaging that can easily bend and straighten the knee etc. after being attached.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a probe device for local imaging according to the present invention, FIG. 2 is a sensitivity distribution diagram of the device of this embodiment,
Figure 3 is an explanatory diagram of the usage state of the device of this embodiment, and Figure 4 is the
Explanatory diagrams of MR images obtained in the usage state shown in Figures 5 and 7.
The figure is a front view of another example device, FIG. 6 is a side view of the device shown in FIG. 5, and FIGS. 8 and 9 are explanatory diagrams of the conventional device. 4... Coil support part, 5... Base part, 6... RF
Coil, P...subject. Agent Patent Attorney Nori Chika Ken Shu
Near B Takeshi 6,, A: L/ , 4
1 h+b″41ゝゝ5 庝-?3耶芦1 fig.) IJ 7＼ 7・4 ゝ＼ 5. fig.

Claims (1)

[Claims] A probe device for local imaging, which includes an RF coil capable of detecting magnetic resonance signals from a subject and enables local imaging of the subject, includes a base portion formed in a flat plate shape, and the base portion. The RF
1. A probe device for local imaging, comprising: a coil support portion that supports a coil.