CN217511017U - CT imaging and image-guided radiotherapy device - Google Patents

Abstract

The utility model relates to a radiation medical equipment technical field, concretely relates to CT formation of image and image guide radiotherapy device, including fixing base, the pendulum position subassembly of being connected with the treatment bed, set up solid of revolution, radiation source subassembly and image guide subassembly on the fixing base, the radiation source subassembly includes the source body and the collimation body. Not only can the accurate positioning be realized, but also the focus center of the focus of the patient, the focus point of the radioactive source and the focus center of the X-ray imaging coincide at one point; the treatment condition of the treatment position can be timely found through real-time imaging during treatment, when the treatment position has deviation, the treatment plan of the radiotherapy is adjusted in real time according to the treatment condition, and can be confirmed without using other imaging equipment, through the CT imaging and image guiding radiotherapy device of the utility model; the total time in the treatment process is greatly shortened, and meanwhile, the device has a good imaging effect, can provide accurate and effective data and images for diagnosis, and improves the use efficiency of radiotherapy equipment and the efficiency of the treatment process.

Description

CT imaging and image-guided radiotherapy device

Technical Field

The utility model relates to a radiation medical equipment technical field, concretely relates to CT formation of image and image guide radiotherapy device.

Background

Radiotherapy is an important tumor treatment means, and has entered the precise radiotherapy era at present. The greatest advantage of precise radiotherapy is that the tumor is precisely hit, the damage to normal tissues is slight, but the conditions of accurately finding the tumor, precisely positioning the tumor, finely controlling the tumor mobility and the like are required for achieving the goal, and the preconditions are all realized by an image guidance technology.

At present, a plurality of image guidance technologies with different modes are clinically adopted, the image guidance technologies are various and have advantages and disadvantages, the imaging principles, technical parameters and application environments of the image guidance technologies are deeply known, and the method has important significance for a clinician to correctly select a proper image guidance mode and improve the accurate radiotherapy effect to the maximum extent. On the one hand, the treatment process of the existing radiotherapy technology is long. Because multiple placements are required in the prior art, the patient needs to be moved to another location or imaging department for imaging confirmation. The patient needs to use other imaging devices to predetermine and mark the position of the lesion of the patient in the positioning process, the imaging device at another position or department needs to image the lesion of the patient in advance, and the lesion position is marked and fixed, the fixation needs to use special materials through the positioning bed, the patient is kept on the positioning bed, and the distance between the position of the lesion and the reference center is determined according to the calculation of the reference center on the bed. The positioning bed with the fixed patient is transported to a treatment positioning device of the radiotherapy equipment through a mobile instrument, and then the positioning bed is automatically positioned through the radiotherapy equipment according to the reference center of the positioning bed to implement treatment. If the placement is biased, the actual dose delivered to the lesion may vary from the prescribed dose in the radiation treatment plan, which may result in a second or even multiple treatments to achieve the desired dose and treatment effect for the intended treatment plan. The long treatment process time indirectly causes the radiation dose received by the non-treatment position of the patient to be relatively more, which brings adverse effect. Maintaining a posture for an extended period of time can affect the mood of the patient and cause the patient to adjust posture to affect their location in the focal zone of the positioning bed.

Prior patent No. CNCN200510036681.8 discloses a radiation therapy radiation device for gamma ray rotary focusing. The radiation source comprises a rotary ring, a source body and a detector, wherein a plurality of radiation sources are arranged in the source body, beams emitted by the radiation sources focus on a common focus on the axis of the rotary ring, one ends of the source body and the detector are respectively connected to the rotary ring and are oppositely arranged along the radial direction of the rotary ring, a high-activity therapeutic radiation source and a low-activity diagnostic radiation source are arranged in the source body, the beams of the radiation sources penetrate through the axis of the rotary ring and enter the detector oppositely arranged with the source body, and the detector responds after receiving radiation information and outputs detection information. It does not allow positioning and confirmation of lesion position prior to radiation treatment and its imaging resolution is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a CT imaging and image guiding radiotherapy device with better imaging effect and clear imaging, which solves the defects and the defects of the prior art.

In order to achieve the above object, the utility model discloses a technical scheme who takes is a CT formation of image and image guide radiotherapy device, including fixing base, the solid of revolution of setting on the fixing base, source subassembly and image guide subassembly, the source subassembly includes the source body and the collimation body, be equipped with a plurality of radiation sources in the source body, the collimation is internal be equipped with the collimator that the radiation source is corresponding, the radiation source pass through the collimator focus in the last radiation focus of the rotatory central axis of solid of revolution, the image guide subassembly includes multiunit flat panel detector and multiunit X ray bulb, each group flat panel detector and each group the X ray bulb respectively relative set up in on the fixing base, a CT formation of image and image guide radiotherapy device still include the pendulum position subassembly of being connected with the treatment bed, the position subassembly realizes X through moving assembly to, And the Y-direction and the Z-direction are arranged so that the center of the focus of the patient, the projection center of the intersection of the cone beam of the X-ray generated between each group of X-ray bulb tubes and the flat panel detector and the focal point of the radioactive source are integrated into a whole.

Further, the method comprises the following steps of; the movable assembly comprises a Y-direction sliding seat, a Z-direction threaded sleeve, a Z-direction screw rod and an X-direction sliding seat, the two ends of the positioning assembly are provided with the Y-direction sliding seat, one end of the Z-direction screw rod is connected with the Y-direction sliding seat, the other end of the Z-direction screw rod is connected with the X-direction sliding seat, the Z-direction threaded sleeve is sleeved on the Z-direction screw rod, and the X-direction sliding seat is fixed on the ground.

Further, the method comprises the following steps of; z to the screw rod Z to the swivel nut Y to the slide with the pendulum position subassembly is all in X realizes X to the pendulum position to removing to the slide along X, Z to the swivel nut pass through the screw thread with Z is connected to the screw rod, makes Z to the swivel nut Y to the slide with the pendulum position subassembly all realizes Z through screw transmission and goes up and down, Y is fixed to the slide Z to on the swivel nut, the pendulum position subassembly is in Y slides along X to the slide on to the slide and realizes X to the removal to make patient's focus center align radiation focus through the pendulum position in X to, Y to and Z to.

Further, the step of; the rotary body comprises a collimating body rotating mechanism, and the collimating body rotating mechanism is in driving connection with a motor, so that the collimating body rotating mechanism rotates around the rotating central axis of the rotary body clockwise or anticlockwise.

Further, the method comprises the following steps of; the revolving body further comprises a source body rotating mechanism, and the source body rotating mechanism is in driving connection with the motor, so that the source body rotating mechanism rotates clockwise or anticlockwise around the rotating central axis of the revolving body.

Further, the step of; the source body is arranged on the source body rotating mechanism, the collimating body is arranged on the collimating body rotating mechanism, and when the source body rotating mechanism and the collimating body rotating mechanism are driven by the motor to rotate relatively, a radiotherapy position and a shielding position are formed.

Further, the step of; the radiotherapy position is that after the collimating body and the source body circularly move to a set angle through the collimating body rotating mechanism and the source body rotating mechanism, the radioactive source wire harness in the source body passes through the collimator to carry out radiotherapy.

Further, the method comprises the following steps of; the shielding position is that after the collimating body and the source body mechanism circularly move to a set angle through the collimating body rotating mechanism and the source body rotating mechanism, the radioactive source wire harness in the source body is shielded by a shielding layer in the collimating body mechanism.

Further, the step of; the assembling contact surface of the collimation body and the source body is a spherical surface, a circular arc surface or a plane.

Further, the method comprises the following steps of; the image guide assembly further comprises a data processing system, wherein the data processing system is connected with the flat panel detector and provides related images according to information transmitted by the detector.

The utility model has the advantages that:

the utility model provides a CT imaging and image guiding radiotherapy device, a positioning component realizes X-direction, Y-direction and Z-direction positioning through a moving component, so that the focus center of a patient is integrated with the projection center of the intersection of a strand X-ray cone beam and the focus point of a radioactive source which are respectively generated between each group of X-ray bulb tubes and a flat panel detector; not only can the accurate positioning be realized, but also the focus center of the patient, the focus point of the radioactive source and the focus center of the X-ray imaging coincide at one point; the treatment condition of the treatment position can be timely found through real-time imaging during treatment, when the treatment position has deviation, the treatment plan of the radiotherapy is adjusted in real time according to the treatment condition, and can be confirmed without using other imaging equipment, through the CT imaging and image guiding radiotherapy device of the utility model; the total time in the treatment process is greatly shortened, and meanwhile, the device has a good imaging effect, can provide accurate and effective data and images for diagnosis, and improves the use efficiency of radiotherapy equipment and the efficiency of the treatment process.

Drawings

Fig. 1 is a schematic structural view of a CT imaging and image guided radiation therapy apparatus according to the present invention;

FIG. 2 is a cross-sectional view of a radiation source assembly of a CT imaging and image-guided radiation treatment apparatus of the present invention;

FIG. 3 is a schematic view of a radiation source module of a CT imaging and image guided radiation therapy device according to the present invention;

FIG. 4 is a schematic structural view of X-ray imaging in a CT imaging and image-guided radiation therapy apparatus according to the present invention;

FIG. 5 is a cross-sectional view of an X-ray imaging device for CT imaging and image-guided radiation therapy in accordance with the present invention;

FIG. 6 is a schematic view of the CT imaging and image guided radiotherapy apparatus of the present invention during radiotherapy;

FIG. 7 is a cross-sectional view of a CT imaging and image guided radiation treatment apparatus of the present invention during radiation treatment;

fig. 8 is a schematic structural diagram of a positioning assembly in a CT imaging and image guided radiation therapy apparatus according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a CT imaging and image guide radiotherapy device.

In the embodiment of the present invention, as shown in fig. 1-8, the CT imaging and image guiding radiotherapy apparatus comprises a fixing base 160, a revolving body 170 disposed on the fixing base 160, a radiation source assembly 100 and an image guiding assembly 400, the radiation source assembly 100 comprises a source body 120 and a collimating body 110, a plurality of radiation sources 4 are disposed in the source body 120, collimators 5 corresponding to the radiation sources 4 are disposed in the collimating body 110, the radiation sources 4 are focused on radiation focuses 1 on a rotation central axis 2 of the revolving body 170 through the collimators 5, the image guiding assembly 400 comprises a plurality of sets of flat panel detectors 410 and a plurality of sets of X-ray bulbs 420, each set of flat panel detectors 410 and each set of X-ray bulbs 420 are disposed on two sides of the fixing base 160, the CT imaging and image guiding radiotherapy apparatus further comprises a positioning assembly 150 connected to a treatment couch, the positioning assembly 150 realizes the X-direction radiation through a moving assembly, The Y-direction and the Z-direction are arranged, so that the projection center of the intersection of the focus center of the patient 3 and the X-ray cone beam 470 generated between each group of X-ray bulbs 420 and each group of flat panel detectors 410 is integrated with the focus point of the radiation source 4 in three points. The radiation source assembly 100 provides the desired radiation dose at the lesion site that can adjust the X-rays required for radiation therapy in real time; the image guidance assembly 400 provides an auxiliary function of judging the position of the tumor site in real time to assist the patient 3 in positioning, and meanwhile, the X-ray acquired by the image guidance assembly 400 judges and monitors the radiotherapy effect of the disease state during treatment, so that image data for assisting the treatment is provided for an operator, and the supply of the radiation dose is controlled in real time.

The focus center of a patient is quickly and accurately aligned to the focus point of a radioactive source through X-ray real-time imaging guide and automatic positioning; monitoring the treatment condition through X-ray real-time imaging, evaluating and confirming the implementation effect of the treatment plan of the radiotherapy, and providing real-time information support for the final treatment plan or the adjustment of the treatment plan; the focus position of the patient 3 can be marked without using other imaging equipment, special positioning beds and other devices, and the treatment effect can also be evaluated without using other imaging equipment, therefore, the utility model simplifies a plurality of necessary treatment processes which lack image guidance, and greatly shortens the total time of radiotherapy of each patient 3; the radiotherapy treatment system can provide image monitoring, realize real-time monitoring and verification of treatment dosage, ensure that radiotherapy is faster and more accurate, and improve the use efficiency of radiotherapy equipment and the efficiency of a treatment process.

The fixing base 160 further includes a fixing base support connection structure 140 fixed on the ground by bolt connection and concrete grouting, and the X-ray generated by the X-ray bulb 420 irradiates the suspicious lesion tissue and the surrounding tissue of the patient 3, and is received by the flat panel detector 410, and then the X-ray projection image is collected by the algorithm provided by the controller host, and the CT image and the DRR projection image can be uploaded, and the image registration for patient positioning can be performed. The source body 120 includes a source box and an auxiliary mechanism, the source box is provided with a plurality of radioactive sources 4, wherein the exit points of the radioactive sources 4 are arranged on the position of a spherical surface, on one hand, the central axis of each radioactive source 4 is focused to a set radiation focus 1, and the radiation focus 1 is located on the rotating central axis 2 of the revolving body 170; on the other hand, the dose of each radiation source 4 in the radiation focus 1 is almost the same in the same time, which facilitates the adjustment and control of the dose. The collimating body 110 can be different types of collimating bodies 110, and the different types of collimating bodies 110 can be designed with several different specifications of collimating bodies 110 according to clinical needs. The collimator body 110 is used for directing the radiation beam, focusing the radiation beam, and shielding the radiation beam in directions other than the treatment beam. Shielding is required when not under radiation therapy. When shielding, not only the radiation beam is blocked and sealed, but also special heavy metal materials such as lead and the like are used for shielding and isolating. By moving the positioning assembly, the center of the lesion of the patient 3 coincides with the radiation focus 1. Imaging once before the patient 3 is precisely positioned, and preliminarily determining the position of a focus; then, according to the X-ray cone beam 470 emitted by the X-ray bulb 420, the imaging data received by the flat panel detector 410 is used for calculating the distances of the positioning component which need to move in the X direction, the Y direction and the Z direction respectively; after the patient 3 is in position, the focus and its position can be confirmed again by imaging. The projection center of the intersection of the X-ray cone beam 470 and the focus center of the radiation treatment are realized by mechanical installation, real-time adjustment during treatment is not needed, and the cumulative error of the adjustment is reduced. During treatment, the patient 3 is only required to be positioned, and radiation treatment is carried out after the focus center of the patient 3 is coincided with the radiation focus 1. The treatment position of the patient 3 is kept still, real-time imaging can be realized, and imaging can be respectively carried out before treatment and after nuclear treatment in the treatment. Confirming the position of the treatment position, the treatment effect and the dosage of the treatment position.

The swing assembly 150 realizes X-direction, Y-direction and Z-direction swing through a moving assembly, wherein the moving assembly comprises a Y-direction sliding seat 151, a Z-direction threaded sleeve 152, a Z-direction screw 153 and an X-direction sliding seat 154, the Y-direction sliding seat 151 is arranged at two ends of the swing assembly 150, one end of the Z-direction screw 153 is connected with the Y-direction sliding seat 151, the other end of the Z-direction screw 153 is connected with the X-direction sliding seat 154, the Z-direction threaded sleeve 152 is sleeved on the Z-direction screw 153, the X-direction sliding seat 154 is fixed on the ground, and the Z-direction screw 153, the Z-direction threaded sleeve 152, the Y-direction sliding seat 151 and the swing assembly 150 move together on the X-direction sliding seat 154 along the X direction to realize X-direction swing; the Z-direction screw sleeve 152 is connected with the Z-direction screw 153 through threads, so that the Z-direction screw sleeve 152, the Y-direction sliding seat 151 and the positioning component 150 are driven together through the threads to realize Z-direction lifting; the Y-direction sliding base 151 is fixed on the Z-direction threaded sleeve 152, and the swing assembly 150 can slide on the Y-direction sliding base 151 along the X-direction sliding base 154 to realize the X-direction movement. Thus, the focus of the radiation is centered in the patient 3 by a combined positioning in the X, Y and Z directions with the radiation focus 1.

In the present embodiment, the rotator 170 includes a collimating body rotating mechanism 171, and the collimating body rotating mechanism 171 is in driving connection with a motor so that the collimating body rotating mechanism 171 rotates clockwise or counterclockwise around the rotation central axis 2 of the rotator 170.

In the present embodiment, the rotator 170 further includes a source rotating mechanism 172, and the source rotating mechanism 172 is in driving connection with the motor, so that the source rotating mechanism 172 rotates clockwise or counterclockwise around the rotation central axis 2 of the rotator 170.

In the present embodiment, the source body 120 is disposed on the source body rotating mechanism 172, and the collimator body 110 is disposed on the collimator body rotating mechanism 171, so that the radiotherapy position and the shielding position are formed when the motor drives the source body rotating mechanism 172 and the collimator body rotating mechanism 171 to rotate relatively.

In the present embodiment, after the collimator 110 and the source body 120 circularly move to a set angle by the collimator rotating mechanism 171 and the source body rotating mechanism 172, the radiation source 4 in the source body 120 passes through the collimator 5 to perform radiation treatment. In the radiation therapy, the focus position of a patient 3 must be kept still; the radiation source 4 is directed to send an X-ray beam through a pre-set collimator 110. The X-ray beam makes a circular motion at a set angle according to the treatment plan with the revolving body 170 around the central axis of rotation. The circular motion can be performed by rotating in a clockwise direction as shown in fig. 4 or in a counterclockwise direction. In the radiation therapy, when the dose of the radiation therapy and the effect of the radiation therapy need to be confirmed, the collimating body 110 and the source body 120 may be rotated to stay at the position shown in fig. 4 or at one side of the symmetrical position thereof for performing the X-ray imaging.

In the present embodiment, the shielding position is that after the collimating body 110 and the source body 120 circularly move to a set angle through the collimating body rotating mechanism 171 and the source body rotating mechanism 172, the radiation source 4 beam in the source body 120 is shielded by the shielding layer containing the lead layer in the collimating body 110. The radioactive source 4 beam in the source body 120 is shielded by a shielding layer which contains a certain thickness and is made of lead containing layer in the collimating body 110, so that the leakage of radioactive dose is eliminated or reduced to the maximum extent; the shielded site is in a non-radiation therapy state.

In this embodiment, the fitting contact surface of the collimating body 110 and the source body 120 is a spherical surface, a circular arc surface or a plane surface.

In this embodiment, the image guidance assembly 400 further includes a data processing system, which is connected to the flat panel detector 410 and provides the relevant image according to the information transmitted by the flat panel detector 410. The data processing system comprises an exposure controller 450, a high voltage generator 430, an isolation transformer 440 and a controller host 460, wherein the exposure controller 450 is used for turning on or off the high voltage generator 430 and the isolation transformer 440 and controlling working parameters and time of the high voltage generator 430 and the isolation transformer 440, the high voltage generator 430 is used for providing direct current high voltage for two poles of the X-ray bulb tube 420, and the isolation transformer 440 is used for providing heating current for a filament of the X-ray bulb tube 420 to complete switching of tube voltage and filament heating current among different loads, so that the X-ray bulb tube 420 generates X-rays.

Specifically, the radiation source assembly 100 further includes a counterweight shielding body 130, the counterweight shielding body 130 is fixed on the revolving body 170, and the revolving body 170 is provided with a bearing.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims (10)

1. A CT imaging and image guiding radiotherapy device comprises a fixed seat (160), a revolving body (170) arranged on the fixed seat (160), a source assembly (100) and an image guiding assembly (400), wherein the source assembly (100) comprises a source body (120) and a collimating body (110), a plurality of radioactive sources (4) are arranged in the source body (120), collimators (5) corresponding to the radioactive sources (4) are arranged in the collimating body (110), the radioactive sources (4) are focused on a radiation focus (1) on a rotating central axis (2) of the revolving body (170) through the collimators (5), the image guiding assembly (400) comprises a plurality of groups of flat panel detectors (410) and a plurality of groups of X-ray spherical tubes (420), and each group of flat panel detectors (410) and each group of X-ray spherical tubes (420) are respectively and oppositely arranged on the fixed seat (160), the method is characterized in that: the CT imaging and image-guided radiotherapy device further comprises a positioning component (150) connected with the treatment couch, and the positioning component (150) realizes X-direction, Y-direction and Z-direction positioning through a moving component, so that the center of a focus of a patient (3) is integrated with the projection center of the intersection of the X-ray cone beam (470) generated between each group of the X-ray bulb tube (420) and the flat panel detector (410) and the focal point of the radioactive source (4) into a whole.

2. A CT imaging and image guided radiation therapy device according to claim 1, wherein: the removal subassembly includes that Y is to slide (151), Z to swivel nut (152), Z to screw rod (153) and X to slide (154), the both ends of putting position subassembly (150) are provided with Y is to slide (151), Z to screw rod (153) one end with Y is connected the other end to slide (151) and is connected to slide (154) with X, Z cup joints to swivel nut (152) Z is to on screw rod (153), X is fixed subaerial to slide (154).

3. The CT imaging and image guided radiation therapy device of claim 2, wherein: the Z-direction screw rod (153), the Z-direction screw sleeve (152), the Y-direction sliding seat (151) and the positioning component (150) move along the X direction on the X-direction sliding seat (154) to achieve X-direction positioning, the Z-direction screw sleeve (152) is connected with the Z-direction screw rod (153) through threads, so that the Z-direction screw sleeve (152), the Y-direction sliding seat (151) and the positioning component (150) achieve Z-direction lifting through thread transmission, the Y-direction sliding seat (151) is fixed on the Z-direction screw sleeve (152), the positioning component (150) slides on the Y-direction sliding seat (151) along the X-direction sliding seat (154) to achieve X-direction movement, and therefore focus centers of a patient (3) are aligned with a radiation focus (1) through positioning in the X direction, the Y direction and the Z direction.

4. The CT imaging and image guided radiation therapy device of claim 1, wherein: the revolving body (170) comprises a collimating body rotating mechanism (171), and the collimating body rotating mechanism (171) is in driving connection with a motor, so that the collimating body rotating mechanism (171) rotates clockwise or anticlockwise around a rotating central axis (2) of the revolving body (170).

5. The CT imaging and image guided radiation therapy device of claim 1, wherein: the revolving body (170) further comprises a source body rotating mechanism (172), and the source body rotating mechanism (172) is in driving connection with a motor, so that the source body rotating mechanism (172) rotates clockwise or anticlockwise around the rotating central axis (2) of the revolving body (170).

6. The CT imaging and image guided radiation therapy device of claim 5, wherein: the source body (120) is arranged on the source body rotating mechanism (172), the collimating body (110) is arranged on the collimating body rotating mechanism (171), and a radiotherapy position and a shielding position are formed when the source body rotating mechanism (172) and the collimating body rotating mechanism (171) are driven by the motor to rotate relatively.

7. The CT imaging and image guided radiation therapy device of claim 6, wherein: the radiotherapy position is that after the collimating body (110) and the source body (120) circularly move to a set angle through the collimating body rotating mechanism (171) and the source body rotating mechanism (172), a beam of a radioactive source (4) in the source body (120) passes through the collimator (5) to perform radiotherapy.

8. The CT imaging and image guided radiation therapy device of claim 6, wherein: the shielding position is that after the collimating body (110) and the source body (120) circularly move to a set angle through the collimating body rotating mechanism (171) and the source body rotating mechanism (172), the radiation source (4) wire beam in the source body (120) is shielded by a shielding layer in the collimating body (110).

9. The CT imaging and image guided radiation therapy device of claim 8, wherein: the assembling contact surface of the collimation body (110) and the source body (120) is a spherical surface, a circular arc surface or a plane.

10. The CT imaging and image guided radiation therapy device of claim 1, wherein: the image guidance assembly (400) further comprises a data processing system, wherein the data processing system is connected with the flat panel detector (410) and provides related images according to the information transmitted by the detector.

Images