JPS6340538A - Ct image diagnostic method - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention relates to an image diagnosis method in a C7 image diagnosis apparatus used in the field of medical diagnosis, and in particular, to an image diagnosis method using a C7 image diagnosis apparatus used in the field of medical diagnosis. The present invention relates to an improvement in a CT image diagnosis method for interpreting detected abnormalities in a diagnosis target site while injecting a contrast medium into the target site.

(Prior art) In diagnosis using a C7 image diagnostic system, a predetermined amount of contrast medium determined according to the purpose of diagnosis is injected into the body of the patient (subject), and abnormalities in the patient are detected and interpreted based on the passage of time. are doing.

In this case, the arm or the like is usually selected as the injection site, and the contrast agent is sent to the affected area (diagnosis target area) using the blood vessel as the injection route.
In this example, if the contrast agent is located far away from the patient's arm (in this example), when the contrast agent is injected, the contrast agent will inevitably remain in the long injection path from the injection site to the diagnosis target site.

(Problem to be Solved by the Invention) This residual contrast agent causes so-called artifacts on the screen, which not only harms diagnostic images during interpretation, but also reduces the time and CT value. This may adversely affect changes in the contrast of the patient, and furthermore, the contrast agent injected into the body is not effectively utilized, leading to the disadvantage that the dynamic effect cannot be fully demonstrated. Therefore, a solution to this problem is strongly desired.

The present invention has been made in view of this situation, and is a method for achieving rapid clinical diagnosis using the Guinamisoku Scan.
7 image diagnosis method.

[Structure of the invention]

(Means for Solving the Problems) The configuration of the present invention to achieve this object detects abnormalities in the diagnosis target site while injecting a contrast agent from a distant injection site to the diagnosis target site. In the C7 image diagnosis method for image interpretation, first, a predetermined amount of contrast agent is applied from the injection site to the diagnosis target site, and then the injection system path from the injection site to the diagnosis target site is filled. can be done
This was done by injecting physiological saline.

(Function) The function of the present invention based on this configuration is that the injection system path from the injection site to the diagnosis target site is filled with physiological saline that does not have any adverse effects on the human body or image interpretation. (Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings. In FIG. 1, ] and 2 are first and second cylinder means having the structure described later, the first cylinder means 1 is filled with a contrast medium M suitable for diagnostic purposes, and the second cylinder means 2 is It is filled with physiological saline W.

3 is a discharge pipe 1 of each of the two cylinder means 1 and 2;
With valve means connected to a and 2a, both discharge pipes 1a and 2a
The structure is such that the liquid can be switched and guided to one injection tube 4 afterward. Both cylinder means 1 and 2, which will be described later,
It is configured in advance to be switched in conjunction with the operation switching signal outputted from the controller 6 to the respective cylinder means 1 or 2. 4(, [
The injection tube is connected to the other side of the valve means 3, and its tip is inserted into an injection site G selected on, for example, the arm A of the subject P by an appropriate method [see FIG. 3 (A)]. 5
is a pressure gauge provided around the injection pipe 4, which measures the pressure per hour (flow rate) of the liquid passing through the injection pipe 4. Reference numeral 6 denotes a controller for controlling the two cylinder means 1 and 2, etc., and inside thereof there are two registers 6a and 6a.
6b and other appropriate driving force sources (not shown) are provided.

7 is a scanner system for CT image diagnosis.

FIG. 2 is a schematic structural diagram of a cylinder means, taking one of the two cylinder means (first cylinder means 1) as a representative example, and shows different types of liquid filled inside. The second cylinder means 2 also has a similar structure.

In the figure, 101 is the main body of the cylinder means I, and 102 is a cylinder provided therein, which is filled with a contrast medium M by an appropriate method. Reference numeral 103 designates a hollow screw I/N that engages with this cylinder 102, and a nut portion 103 that engages with a screw member 105, which will be described later, is provided in the hollow portion near its outer end.
A is installed, and a movable switch 1, which will be described later, is installed on a part of the outside.
A piston head 103b that engages with 08 is formed.

104 is a reversible rotary motor (for example, a DC motor or a synchronous motor) for driving the piston 103 in the left-right direction in the figure, and the input drive energy value (
It is configured such that its rotational speed is determined by the amount of driving force), and is connected to the driving force source of the controller 6 via a power line 106.

A screw member 105 is fixed to the rotating shaft.

Reference numeral 107 denotes a lid of the cylinder means 1, and a guide groove 107a, which is elongated in the left-right direction in the figure, is formed in a part of the lid. Reference numeral 108 denotes a movable switch configured to be able to move in the left and right directions while being guided by the guide groove 107a, and in the illustrated embodiment, its position can be set manually. This is for regulating the amount of movement of the piston 103 and determining the flow rate of the contrast medium M flowing into the discharge pipe 1a. The setting information of the amount of movement (ie, flow rate) is configured to be introduced to the controller 6 via a signal line 109. 108a is an operating piece of the movable switch.

These members 101 to 109 are 201 to 209, respectively, in the case of the second cylinder means 2, and accordingly, the member symbols of the six controllers are also respectively PW2. S
W2 is replaced, and the liquid filled in the cylinder 202 is also changed to physiological saline.

Next, the operation of this embodiment having this configuration will be explained in each step.

(First step) First, the contrast medium M is filled into the cylinder 102 of the first cylinder means 1, and the physiological saline W is filled into the cylinder 202 of the second cylinder means 2. Thereafter, in the first cylinder means 1, , the position of the movable switch 108 is manually set to determine the injection amount of contrast medium M according to the diagnostic purpose, and the second
The cylinder means 2 determines the amount of physiological saline W that can fill the path (usually blood vessels > If possible, manually set the position of another movable switch 20B.

The set position information of the two movable switches 108 and 208 is input to the controller 6 side via signal lines 109 and 209, respectively, and stored in the registers 6a and 6b.

[Second Step] The CT scanner system 7 determines the injection speeds of the contrast medium M and physiological saline W, and inputs them as 5etup signals A and B to the controller 6 side.

This signal is stored in registers 6a and 6b within the controller 6.

[Third Step] Next, the CT scanner system 7 issues an activation signal ST. Then, the controller 6 supplies a driving force signal PWI instructing the motor 104 of the first cylinder means 1 to rotate at a speed based on the information stored in one register 6a.

[Fourth step] As a result, the motor 04 rotates accordingly and pushes the piston 103 to the left, so that the contrast medium M in the cylinder 102 is delivered to the subject via the discharge pipe 1a, the valve means 3, and the injection pipe 4. It begins to be injected into P.

[Fifth Step] Now, when the piston 103 moves to the left as the motor 04 rotates, its head 103b comes into contact with the actuating piece 108a of the movable switch to notify that the amount of movement of the piston 103 has reached the set amount. A detection signal SWI is input to the controller 6 via the signal line 109. Therefore, the controller 6 immediately stops supplying the driving force signal PWI. Therefore, at this point, a predetermined amount of contrast medium M is injected into the body of the subject P, and as shown in FIG. This will fill the system.

The controller 6 simultaneously scans the CT scanner.
Signal Ackl to system 7 indicating completion of injection of contrast medium M
Output.

[Sixth Step] Subsequently, the controller 6 supplies the motor 204 of the second cylinder means 2 with a predetermined driving force signal PW2 based on the information recorded in the other register 6a.

Therefore, the piston 203 of the second cylinder means 2 moves in the same way as in the case described above and comes into contact with the actuating piece 208a of the other movable switch. Therefore, the detection signal SW2 notifying that the amount of movement of the piston 103 has reached the set amount is input to the controller 6 via the signal tflA209, and as a result, the controller 6 immediately stops supplying the driving force signal PW2. At the same time, a physiological saline W injection completion signal Ack2 is sent to the CT scanner system 7.
Output.

Therefore, as shown in FIG. 3(C), the system leading from the injection site G to the diagnosis target site H while retaining the required amount of contrast medium M in the aforementioned diagnosis target site H and the subsequent system path. The inside of the road is filled with physiological saline W.

This means that the contrast agent that would remain in the system on the injection site side according to the conventional method is effectively used at the diagnosis target site due to the boosting action of the physiological saline.
As shown in FIG. 4, it is also possible to improve the contrast of the time curve curve showing time and CT value fluctuations in the diagnosis target site I.

Although one embodiment has been described above, the present invention is not limited to this, and can be modified in various ways within the scope of departing from the gist thereof. For example, in the illustrated embodiment, a valve means is used, but this may be replaced by any suitable means if it is possible to switch between injections of contrast medium and saline.

〔Effect of the invention〕

When the present invention described above is used, since there is no contrast agent remaining in the system on the side of the injection site, the effect is that image artifacts caused by the residual contrast agent are significantly reduced.

1, 1

[Brief explanation of drawings]

Fig. 1 is an overall schematic diagram of an embodiment of a CT image diagnosis apparatus to which the image diagnosis method of the present invention is applied, and Fig. 2 shows one of the two cylinder means used in this embodiment as a representative example. Schematic structural diagram of the cylinder means shown in Figure 3 (a) and (
D) and (C) are explanatory diagrams for explaining the present invention in detail, and Fig. 4 shows time and CT, which is one of the effects of the present invention.
FIG. 3 is a performance diagram showing the contrast of time curve curves showing value fluctuations. A...Arm, G...Injection site, H...Cardiac PM (diagnosis target area), L...System tract, M...
... Contrast medium, P... Subject (patient), W... Physiological saline, ■... First cylinder means, 2... Second cylinder means, 3... Valve means, 4...・・Injection tube, 5・・
- Pressure gauge, 6... Controller, 7... CT scanner system, 102... Cylinder, 103... Piston.

Claims (3)

[Claims] (1) In a CT image diagnosis method in which a contrast agent is injected into a diagnosis target site from a distant injection site and interpreted to detect an abnormality in the diagnosis target site, first, a contrast agent is injected into the diagnosis target site from the injection site at a remote location. A fixed amount of contrast medium is injected, and then the injection system from the injection site to the diagnosis target area is injected.
1. A CT image diagnosis method, characterized in that physiological saline is injected in an amount sufficient to fill the system. (2) C according to claim 1, wherein the injection of the contrast material and the injection of the physiological saline are performed by sequentially operating two cylinder means having a common injection port.
T image diagnosis method. (3) The CT image diagnosis method according to claim 2, wherein the sequential operation of the two cylinder means is accompanied by switching of a valve means provided at the common injection port.