CN202982022U - Combined-type X-ray medical image system - Google Patents

Abstract

A combined-type X-ray medical image system belongs to the medical X-ray image field. The combined-type X-ray medical image system comprises a column (1), a flat panel detector (4), a line scanning detector (5), a combined-type collimator (7), an X-ray tube (8) and the like. A beam (2) is arranged on the column (1) and can be adjusted to move vertically. X-rays emitted by the X-ray tube penetrate through a patient though a square hole type collimator and then detected by the flat panel detector; the X-rays emitted by the X-ray tube penetrate though the patient though a slit type collimator and then detected by the line scanning detector; and by adjusting the motion of the beam on the column, the X-ray machine can scan the patient vertically. The combined-type X-ray medical image system comprises the flat panel detector and the line scanning detector; utilizes the high-resolution two-dimensional detectors to complementally examine the suspicious area found on a screen in detail; and can perform an independent X-ray examination with the aid of X-rays. The combined-type X-ray medical image system is low in radiation quantity and capable of reducing equipment cost and low in space occupation.

Description

A combined X-ray medical imaging system

technical field

A combined X-ray medical imaging system, in particular to a multifunctional X-ray imaging system for diagnosis and preventive inspection, belonging to the field of medical X-ray imaging. the

Background technique

The detector is the core component of the digital X-ray imaging system, and only a few countries such as the United States, France, Japan, Canada, and Russia have its production technology. the

Devices in the field of medical X-ray imaging should have the following characteristics:

There are two main ways in the structure of digital medical imaging system - traditional flat panel detector (two-dimensional); and one-dimensional (linear) line scan detector. Each method has its own advantages and disadvantages;

At present, flat-panel detectors are commonly used in medical X-ray imaging equipment. The flat-panel detector uses a single-piece amorphous silicon panel with a scintillator to convert the absorbed X-ray signal into a visible light signal, and then read out the visible light through a low-noise photodiode array. And converted into electrical signals, and then the digitized signal of each circuit is transmitted to the image processor through the low-noise readout circuit, and the computer integrates it into an X-ray image. the

It can be seen from the above principles that the imaging quality of the X-ray imaging system is mainly determined by the flat panel detector, and the performance index of the detector will have a great impact on the image quality. After decades of development, the flat panel detector has been quite mature, so it has very good imaging quality. But it is undeniable that flat panel detectors also have a big technical bottleneck, that is, the problem of high radiation dose is difficult to solve. Excessive radiation doses have brought great health hazards to the subjects. Reports of tissue lesions, tumors, and leukemias caused by X-ray imaging are also common, and they are increasingly valued by the society. "Development of low-dose digital X-ray machine technology and products" has also been included in the national science and technology medium and long-term development plan (new treatment and conventional diagnosis and treatment equipment, digital medical technology). the

The one-dimensional line scan detector has its unique technical advantages, that is, it can obtain images of any size with the lowest radiation dose and the least geometric distortion by virtue of the line scan mechanism that prevents diffuse scattering in the patient's body. The radiation dose is about One tenth of the flat panel detectors commonly used in the market. the

But on the other hand, this low-dose line scanning mechanism has limited spatial resolution and long exposure time, so it cannot be used in the browsing state;

Two-dimensional systems can have high resolution, short exposure times, and can be browsed. However, the image size is limited, the dose is greatly increased, and the geometric distortion actually increases;

In order to solve the technical bottlenecks of the above two detectors, vertical and horizontal scanning devices, or a multi-purpose rotary table can be installed. The processing of multi-purpose workbench is complex and expensive. A device with a standing structure is sufficient for most X-ray examinations;

In terms of functional use, the device can be used for diagnostic testing where the image quality (roughly determined spatial resolution) is considered first, and the dose is of no practical significance; it can also be used for preventive screening, where the lowest dose is first considered, and the resolution The rate is sufficient for this screening. the

Therefore, we analyzed all the above-mentioned characteristics and problems, and built a combined structure of a low-radiation dose line scan and a common digital device using a high-resolution flat-panel detector for the first time in the world. the

Contents of the invention

The purpose of the utility model is to provide a multi-purpose low-dose X-ray machine with a flat panel detector and a linear detector, in particular to a multi-functional X-ray system for diagnosis and preventive inspection. the

A combined X-ray medical imaging system, the imaging system includes a cylinder (1), a beam (2), a flat panel detector (4), a line scanning detector (5), a combined collimator (7), X-ray tube (8), patient standing position (9), base (10);

Cylinder (1) is installed on the base (10);

The beam (2) is installed on the cylinder (1), and can be adjusted to move up and down on the cylinder; the X-ray tube (8), combined collimator (7), flat panel detector (4) and line scan detector (5 ) are installed on the beam (2);

X-ray tube (8) emits X-rays; the combined collimator includes a square-hole collimator and a slit-type collimator, and the X-rays emitted by the X-ray tube pass through the patient through the square-hole collimator, Then it is detected by the flat panel detector, the X-ray emitted by the X-ray tube passes through the patient through the slit collimator, and then detected by the line scanning detector; the patient is standing on the base;

By adjusting the movement of the beam on the cylinder, the X-ray machine can scan the patient up and down. the

The mechanism of the utility model uses a vertically movable beam on which an X-ray generator, a collimator and a one-dimensional linear detector are fixed. This scanning structure can obtain vertical images of any size. There is no image distortion in the vertical case, so the vertical size of organs and bone details can be measured more accurately. Image quality is the same over the entire scan area, independent of image size. the

The flat panel detector of the utility model can use a flat panel digital detector based on CMOS with a size of 210*230mm and a resolution of 70 microns. Doctors can use this X-ray "magnifying glass" to carefully examine the suspicious parts pointed out by the computer mouse after analyzing the images on the screen. At the same time, this relatively large flat-panel detector can be used for self-diagnostic testing of patients. the

The line scan detector is a one-dimensional detector for recording X-ray radiation passing through the human body. Nuctech's model MIC-768-3 line scan detector can be selected

In the utility model, the X-ray generator, the slit collimator and the linear detector are fixed on the crossbeam, and the crossbeam moves vertically and uniformly along the patient's body during the image scanning process. The data collected by the detector is recorded to the computer every few milliseconds, and after the scan is completed and quickly processed, the reconstructed image appears on the screen. The flat panel (detector) in the horizontal direction moves along the line scanning detector, and the vertical direction moves with the movement of the beam. The radiation for the panel radiation is generated by the collimator of the device itself, and moves synchronously with the panel along the collimator of the scanning mechanism. In this way, the instruments we process have a wide range of functional possibilities, not only for low-dose screening, but also for high-resolution (within 7mm line pairs) and X-ray fluoroscopy diagnostic work. This unique device allows anthropometric analysis (with a detailed view of lesions) of scoliosis in all vertebrae; study of bone structure with the aim of identifying signs of trauma and osteoporosis. Undoubtedly, there will be great demand for such a device because it combines the advantages of line scan and traditional digital systems. the

The utility model is a combination of a flat panel detector and a line scanning detector. Different from the typical two-dimensional (flat panel) detectors or vertical digital medical X-ray machines with one-dimensional (linear) detectors, this device combines the advantages of line scanning and traditional devices, and essentially expands the device range of application, because like a line scan device, ultra-low-dose preventive inspection with very good resolution and large Perform a detailed supplemental review of suspicious areas found on the screen, or perform a stand-alone X-ray inspection with the aid of fluoroscopy. In addition, the radiation dose of the utility model is low. Other advantages of the structure include: a) reducing equipment cost; b) reducing occupied site space. the

Description of drawings

Fig. 1 is a structural diagram of the utility model. Among them, 1-cylinder, 2-beam, 3-ray, 4-flat panel detector, 5-line scanning detector, 6-line scanning detector ray, 7-combined collimator, 8-X-ray tube , 9-patient standing position, 10-base. 

Detailed ways

Further illustrate the utility model below in conjunction with accompanying drawing. the

Fig. 1 is a structural diagram of the utility model. As shown in Figure 1, a combined X-ray medical imaging system includes a cylinder (1), a beam (2), a flat panel detector (4), a line scan detector (5), a combined collimator Device (7), X-ray tube (8), patient standing position (9), base (10);

Cylinder (1) is installed on the base (10);

The beam (2) is installed on the cylinder (1), and can be adjusted to move up and down on the cylinder; the X-ray tube (8), combined collimator (7), flat panel detector (4) and line scan detector (5 ) are installed on the beam (2);

X-ray tube (8) emits X-rays; the combined collimator includes a square-hole collimator and a slit-type collimator, and the X-rays emitted by the X-ray tube pass through the patient through the square-hole collimator, Then it is detected by the flat panel detector, the X-ray emitted by the X-ray tube passes through the patient through the slit collimator, and then detected by the line scanning detector; the patient is standing on the base;

By adjusting the movement of the beam on the cylinder, the X-ray machine can scan the patient up and down. the

The flat panel detector (4) is a CMOS-based flat panel digital detector with a size of 210*230mm and a resolution of 70 microns. the

The line scan detector is the Nuctech model MIC-768-3 line scan detector. the

Some parameters of this low-dose universal X-ray machine are:

1. Parameters when obtaining scanned images

2. Parameters when generating diagnostic images

The dose when obtaining images is about 25% of that of ordinary flat panel detectors

Different from the typical two-dimensional (flat panel) detectors or vertical digital medical X-ray machines with one-dimensional (linear) detectors, this device combines the advantages of line scanning and traditional devices, and essentially expands the device range of application, because like a line scan device, ultra-low-dose preventive inspection with very good resolution and large Perform a detailed supplemental review of suspicious areas found on the screen, or perform a stand-alone X-ray inspection with the aid of fluoroscopy. The radiation dose of the utility model is low, and the equipment cost can be reduced, and the site space occupied can be reduced. the

Claims (3)

1. combined X-ray medical imaging system, it is characterized in that, this image system includes cylinder (1), crossbeam (2), flat panel detector (4), line sweep formula detector (5), combination type collimator (7), X-ray tube (8), patient standing place (9), base (10);

Cylinder (1) is arranged on base (10);

Crossbeam (2) is positioned on cylinder (1), can move up and down in the cylinder adjusted; X-ray tube (8), combination type collimator (7), flat panel detector (4) and line sweep formula detector (5) all are arranged on crossbeam (2);

X-ray tube (8) emission X ray; Described combination type collimator comprises square hole type collimator and slit collimator, the X ray of X-ray tube emission passes the patient by the square hole type collimator, surveyed by flat panel detector, the X ray of X-ray tube emission passes the patient by the slit collimator, then is surveyed by line sweep formula detector again; Described patient standing place is positioned on base;

By adjusting the movement of crossbeam on cylinder, X-ray machine can scan up and down to the patient.

2. a kind of combined X-ray medical imaging system according to claim 1, is characterized in that, described flat panel detector (4) is of a size of 210*230mm for CMOS is the basis, and resolution is the Flat digital detector of 70 microns.

3. a kind of combined X-ray medical imaging system according to claim 1, is characterized in that, described line sweep formula detector (5) is for to look model MIC-768-3 line sweep detector with Fang Wei.

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