JPH057581A - Continuous rotation type x-ray ct apparatus - Google Patents

Abstract

PURPOSE:To achieve fewer trouble and higher durability by bringing a feeder section for charging into contact with a power receiving section of a scanner rotating section only when a need arises with the supply of a power to the rotating section made from a battery to check contact between a slip ring and a brush. CONSTITUTION:A fixed section 1 utilized as mounting part of a device such as gantry is equipped with a power source transmitter 7 for charging a battery 5 and a controller 6 to drive and control the device. A rotating section 2 for the fixed section 1 is equipped with an X-ray tube 3, a detector 4 and a high voltage generator (inverter) 8. Then, during the stoppage scanners 3 and 4, the power source transmitter 7 controlled with the controller 6 is brought into contact with the rotating section 2 to charge the battery 5. On the other hand, during the rotation of the scanners, the power source transmitter 7 is kept from contacting the rotating section 2 being separated therefrom and a necessary power source in the rotating section 2 is supplied from the battery 5. This eliminates the need for a slip ring and a brush thereby achieving fewer trouble and higher durability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous rotation type X-ray CT apparatus, and more particularly to a type having a rotating part for continuously rotating at least an X-ray tube in a gantry, and more particularly to an improved power supply to the rotating part. Regarding the mechanism.

[0002]

2. Description of the Related Art In a third-generation scanner in which an X-ray tube and a detector rotate together, a cable is generally connected between the high-voltage generator and the X-ray tube. The X-ray tube cannot be rotated in the same direction many times. In other words, it is necessary to reverse the rotation direction of the rotating part that holds the X-ray tube and the detector for each scan (every one rotation), which causes a pause time between scans and a high-speed scan. In order to realize the above, the impact on the X-ray tube due to the start and stop of rotation becomes a particular problem.

Therefore, as shown in FIG. 3, a slip ring system is employed in which the slip ring 2'and the brush can be continuously rotated while being brought into contact with each other. Since the electrical connection with is made by the slip ring and the brush, the slip ring and the brush are always in contact with each other.

[0004]

However, since the brush is constantly in contact with the slip ring during the rotation of the skiner, the brush may be worn, and the skiner may be rotated more than necessary. And its durability is short.

It is an object of the present invention to use a battery as a power source for a rotating portion to charge the battery when needed, and to charge a power receiving portion provided in the gantry fixing portion to a battery power receiving portion provided in the rotating portion. Only when they are in contact with each other, and when they are not needed, the contact between them can be released.
A continuous rotation type X-ray CT apparatus is provided.

[0006]

The above-mentioned object is to provide a rotating part for supporting at least an X-ray tube and continuously rotating in a gantry, a battery attached to the rotating part and a power receiving part for the battery, This is achieved by including a power supply unit provided in a fixed unit in the gantry, and a controller that drives the power supply unit to electrically connect to the power receiving unit and disconnect the electrical connection between the two.

[0007]

Since the battery is used to supply power to the rotating portion of the scanner during rotation, the power feeding portion for charging the contact portion is brought into contact with the power receiving portion provided on the rotating portion only when necessary, and the contact is made when unnecessary. The drive controller that releases the slip ring is activated, and the conventional slip ring is constantly in contact with the brush during rotation, resulting in excessive wear of the slip ring or the brush. The durability of is improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to FIG. This FIG. 1 is shown as a schematic elevational cross-section of the gantry. Reference numeral 1 is a fixed portion used as a mounting portion for equipment such as a gantry, 3 is an X-ray tube serving as an X-ray source, 4 is a detector and a data collection portion located at a position facing the X-ray tube 3, and 2 is a rotating portion It is a rotating frame and rotates while supporting the X-ray tube 3, the high-voltage generator 8 (inverter), and the detector 4.

Reference numeral 5 denotes a battery attached to the rotating part 2, and 7 denotes a power transmission device for connecting the power source to charge the battery 5, which is provided in the gantry fixing part 1. Similarly, 6 is attached to the gantry fixing part 1 to drive and control the power transmission device 7, and is connected to the CPU.

With such a configuration example, the scanners 3, 4
At the time of stop, the power transmission device 7 controlled by the controller 6 contacts the rotating portion 2 to charge the battery 5. At the time of rotation, the power transmission device 7 separates from the rotating part 2 and becomes non-contact, and the power required in the rotating part 2 is supplied by the battery 5. Therefore, it is not necessary to use a slip ring and a brush.

As shown in FIG. 2, wiring such as a cable is connected between the battery 5, the high-voltage generator 8 and the X-ray tube 3 and between the battery 5 and the detector 4 for detection. The container 4 has a memory, stores detection data during rotation, and when stopped, the data is transferred to the CPU via the power transmission device 7 and the controller 6 via the wiring.

As another embodiment of the present invention, when a brush is used in the power transmission device, the brush is brought into contact with the slip ring only when necessary to charge the battery.
The difference from the conventional example is to make contact only when necessary,
The difference from the first embodiment is that it can be charged even during rotation.

In the above embodiment, the power supply mechanism of the present invention is used for supplying power to the battery as the power source of the X-ray tube and transferring the detection data of the detector to the fixed part. The power supply mechanism of the present invention may be used for the above, and the conventional slip ring system may be used for the other. In this case, if a slip ring is used on the data transfer side, data can be transferred all the time, which is advantageous. The present invention also provides a fourth-generation X-ray CT in which the detector is fixedly arranged in a ring shape and only the X-ray tube is rotated.
It can also be applied to devices.

[0014]

[Effect] Since the power is supplied to the rotating portion of the scanner during rotation by the battery, the power feeding portion for charging the contact portion is brought into contact with the power receiving portion provided on the rotating portion only when necessary, and the contact is made when not necessary. The drive controller that activates the slip ring is activated, and the conventional slip ring constantly contacts the brush during rotation, resulting in excessive wear of the slip ring or the brush. The durability of is improved.

[0015]

[Brief description of drawings]

FIG. 1 is a schematic front elevation sectional view of a gantry showing an embodiment of the present invention.

FIG. 2 is a schematic side elevation sectional view of a gantry showing an embodiment of the present invention.

FIG. 3 is a perspective view of a main part showing a slip ring and a brush according to a conventional example.

[Explanation of symbols]

 1 Fixed part 2 Rotating part 3 X-ray tube 4 Detector 5 Battery 6 Controller 7 Power transmission device 8 High voltage generator (inverter)

Claims (1)

Claim: What is claimed is: 1. A rotator for continuously rotating at least an X-ray tube in a gantry, a battery attached to the rotator, a power receiver for the battery, and a gantry. A continuous rotation type X comprising: a power supply unit provided in a fixed unit; and a controller that drives the power supply unit to electrically connect to the power receiving unit and disconnect the electrical connection between the two. X-ray CT system.