TW201350163A - A mobile X-ray unit - Google Patents

Abstract

The invention relates to a mobile X-ray unit (10) comprising a base (2) for accommodating a control unit and a power supply further comprising an articulated displaceable arm (4a) supporting an X-ray applicator (4) having an X-ray tube, said X-ray applicator being connected to the base using a flexible cable (3), wherein the X-ray tube comprises a target for generating an X-ray beam (8a), a collimator for shaping the generated X-ray beam and an exit surface (8) through which the X-ray beam passes in use, wherein the X-ray unit further comprises an indicator for providing a visual indication of at least a portion of the X-ray beam emitted from the exit surface.

Description

Mobile X-ray unit

The invention relates to a mobile X-ray unit comprising a base for accommodating a control unit and a power supply, and further comprising an articulated displaceable arm for supporting an X-ray treatment with an X-ray tube The X-ray treatment device is coupled to the base, the X-ray tube includes a collision target for generating an X-ray beam, a collimator for shaping the generated X-ray beam, and an exit surface.

More particularly, the invention relates to a method of visualizing an X-ray beam emerging from an exit window.

The incidence of skin cancer has increased in the past 10 years in the 20th century, and professional medical personnel need to invest a lot of spirit in early diagnosis, logistics and providing appropriate treatment. However, it is gratifying that more than 1.3 million new skin cancers are diagnosed each year and increase at a rate of about 5% per year. Increasing exposure to the sun and reduction of the ozone layer without skin protection is the main reason - it is estimated that more than 1 billion euros will be spent each year on the medical costs of the disease. More than 80% of skin cancers occur in the head and neck areas, and 50% occur in patients over 60 years of age. phase Compared to current demographics, it is expected that by 2025 the elderly population will be twice as large as today.

Non proliferated cancer, which is essentially superficial lesions, can be treated in different ways. First, surgery can be considered. However, the disadvantage is that the waiting time is long and the postoperative treatment is complicated, and the risk of infection may be high after the postoperative trauma. Second, soft X-ray electron irradiation can be considered. This approach has the advantage of being non-invasive, with each treatment being as short as 2 minutes, and it is gratifying that radiation therapy techniques are commonly used as a finishing treatment to include a certain number of treatments.

Therefore, the more the incidence of skin cancer and the increase in the proportion of the elderly population in the overall demographics, pose a substantial challenge to cancer treatment and treatment materials.

In recent years, it has been generally recommended to use a portable X-ray unit that can be used in the radiotherapy department of a hospital. An implementation of such a portable unit is described, for example, in Patent Publication No. US2007/0076851. The known unit includes an X-ray device including an X-ray source and a filter device having a plurality of filters rotatably corresponding to a focal point relative to the X-ray tube for responding to the demand. Change the filtering characteristics. A plurality of filters are disposed in the filter device and are disposed laterally relative to one of the longitudinal axes of the X-ray tube. Such a configuration requires additional considerations to provide an X-ray beam toward the filter plane. This known device uses a distance from the X-ray applicator relative to the patient's skin.

A disadvantage of this known X-ray tube is the X-ray emitted from the X-ray device. The actual delineation control between the beam and the patient's area to be treated is not easy.

It is an object of the present invention to provide a mobile X-ray unit that can control the definition of at least a portion of the X-ray beam actually emitted from the X-ray applicator and the target area on the patient. A still further object of the present invention is to provide a mobile X-ray unit that achieves a visual image corresponding to the full geometric shape of the X-ray beam emerging from the exit surface.

Based on this, the mobile X-ray unit according to the present invention further includes an indicator for providing a visual indication of at least a portion of the X-ray beam emerging from the exit surface.

As used herein, "mobile" and "portable" are interchangeable and are equivalent to a device that can be easily moved or transported, for example, by a single individual or Transport device.

It can be found that when an indicator is provided to visually delineate at least a portion of the generated X-ray beam, such as one of its central axes and/or portions of the full beam geometry, the efficiency of the treatment can be Greatly improved. More preferably, the indicator includes a light source. More preferably, the indicator can be configured to provide a shadow-like indication of the two-dimensional area illuminated by the x-ray beam (in whole or in part). Alternatively, the indicator can advantageously be configured to provide a beam that illuminates a surface area illuminated by some or all of the X-ray beam. The above lighting options simplify the target area on the skin and The correct alignment between the X-ray beams.

The light source can be configured in an X-ray device or can be configured to surround the surface of the X-ray device. In the former example, the light indicator can be configured to define a central axis of the X-ray beam and/or a full beam geometry, while in the latter example, the light indicator can be configured to define an X-ray beam. The central axis, more preferably, is a predetermined distance from the X-ray device. The above features are advantageous when the X-ray applicator is used at a standard distance from the patient's skin. More preferably, however, the configuration of the light indicator surrounding the X-ray device is adjustable to indicate the central axis of the X-ray beam from different axial distances from the X-ray device.

More preferably, the indicator is configurable to provide a contrast image of at least a portion of the X-ray beam. For example, the indicator can be configured to generate a light image comprising a portion of the X-ray beam, wherein the light image is surrounded by a darker background. Alternatively, the indicator can be configured to produce a shadow image in which a darker background associated with one of the X-ray beams is surrounded by a lighter background. In both examples, the contrast edge of the image can be used as a suitable aim for the X-ray applicator relative to the target area.

In accordance with an embodiment of the present invention, a mobile X-ray unit includes an array of light sources that are concentrically arranged around the X-ray device. Although it is sufficient to provide only a single light source to produce a narrow beam, i.e., sufficient to indicate the central axis of the X-ray beam, it has been found to be more advantageous to provide a plurality of light sources to produce individual narrow beams at a distance from the bottom surface of the X-ray device. Set the distance to the meeting. Based on this embodiment, it is made possible to install an X-ray applicator at a prescribed distance from the skin. To ensure that the target portion is properly covered by the X-ray beam, the X-ray device can be positioned such that the center of the indicated X-ray beam is positioned substantially at the center of the target area. More preferably, the function of this embodiment is achieved by a regular shaped X-ray beam, for example when a circular, rectangular, elliptical, or triangular collimator is used to shape the X-ray beam.

In accordance with another embodiment of the present invention, the mobile X-ray unit includes a light source disposed inside the X-ray treatment device to generate a light beam preset to be intercepted by the collimator to provide an exit window. The light image of the emitted X-ray field.

In this embodiment, it can be found that it is better when the entire shape of the X-ray beam is defined. For example, when an irregular beam profile is used. In this case, the light source can be provided close to the target, or through a mirror, off-axis, to produce a beam that is preset as a collimator. More preferably, the direction in which the beam extends is the same as the direction in which the X-ray beam extends. In this embodiment, when a mirror is used, the light source can advantageously be off-axis positioned to minimize its radiation damage.

In accordance with another embodiment of the present invention, a mobile X-ray unit includes a light source and an optical fiber configured to provide light from the light source for intercepting by the collimator.

In this embodiment, the light source can be positioned outside of the X-ray treatment device so as not to affect the overall size. For example, the light source can be disposed on the base of the X-ray unit, and the fiber can be illumined from the base to the inside of the X-ray device for proper illumination. The collimator, in turn, obtains a light image of the generated X-ray beam.

In accordance with another embodiment of the present invention, a mobile X-ray unit includes a plurality of optical fibers distributed in an area of the X-ray treatment device above the collimator for illuminating a collimator opening for collimation The instrument opening intercepts a range of resulting light. This embodiment can be advantageous in obtaining a light range having a strong intensity.

In accordance with another embodiment of the present invention, the mobile X-ray unit includes a light source that emits a narrow beam of light disposed on the inside of the X-ray device to define a longitudinal axis of the X-ray beam. It is even better to use a miniature laser source.

In accordance with another embodiment of the present invention, the collimator is provided with an automatic identification device configured to generate a signal representative of the characteristics of the collimator in the control unit.

This advantage can be found in that it automatically recognizes that the collimator is inserted into the X-ray tube, and that human error for defining the range geometry can be eliminated. For example, when the collimator is housed in a chamber, the chamber can be provided with a resistive path whose resistance value can be changed. The collimator can then be provided with a projection adapted to cooperate with the resistance path of the chamber, thereby changing the final resistance and thus generating a representative signal of the inserted collimator. Even better, this signal can be provided independently as a control unit for the mobile X-ray unit. More preferably, the X-ray unit includes a set of collimators having respective identification devices.

According to another embodiment of the present invention, an X-ray unit can be provided with a signal device for indicating the generation of an X-ray beam.

The benefit of providing this signal device is that it can be discerned that the X-ray beam is on. For example, this signal can be located on an X-ray device with a suitable light source. One or more light emitting diodes can be used based on this. A plurality of signal devices can also be provided corresponding to the energy of the generated X-ray beam.

For example, for the lower portion of the X-ray beam spectrum (about 50 KV), a first indicator, such as a first color light, can be used; for the middle portion of the spectrum (about 60~) 65KV), a second indicator can be used, such as a second color light; finally, for the higher part of the spectrum (about 66~75KV, more preferably 66~70KV), a third indicator can be used, such as The third color of light. It will be appreciated that there may be a plurality of possibilities for indicating different spectra, including but not limited to progressive illumination of a plurality of indicators depending on the hardening of the provided X-ray beam. It will also be appreciated that the indication of the KV range is permissible in the device, in a user interface, or in an implementation unit. More preferably, the above KV ranges are scaled, such as 1,1; 1, 2; 1, 3; 1, 4; 1, 5.

More preferably, the signal device includes a light source indicator disposed on the outer casing. The configuration of the signal device is such that the patient can notice the starting point and the end of the illumination so that the patient can maintain a static posture during the treatment. More preferably, the light indicator signal on the X-ray beam is not linked to the indicator configuration used to define the X-ray beam, as previously described.

In accordance with another embodiment of the present invention, the X-ray unit is provided with a conduit for providing a cooling medium adjacent the X-ray tube, the wiring of the conduit being between the X-ray tube and the housing wall.

It has been found that the advantage of providing a space between the outer surface of the X-ray tube and the inner surface of the housing outside of the X-ray treatment is that the space can be at least partially filled with refrigerant. The benefit of using recycled water as a cooling medium is its specific heat capacity, which provides improved heat transfer relative to the gas. However, compressed gas can also be used as a suitable refrigerant. More preferably, the temperature sensor is disposed on the outer casing of the X-ray device to measure the actual temperature of the outer casing. This temperature sensor can be connected to a control unit for controlling the cooler and/or for controlling the high pressure supply. When the temperature rises to a predetermined shutdown value, the control unit can control to shut down the high pressure supply and/or increase the cooling mode, for example, by increasing the pumping capacity of the refrigerant.

According to another embodiment of the present invention, an X-ray unit can be provided in the outer casing for detecting an X-ray beam.

It can be found that it is advantageous to provide a separate device for detecting the presence or absence of the generated X-ray beam. More preferably, the X-ray unit in accordance with the present invention includes a primary timer that is set for a time for the high voltage supply to provide a predetermined radiation dose. The radiation sensor housed in the housing outside the X-ray device can be part of a second timer, the loop of which is adapted to close the high voltage supply when the predetermined radiation dose is reached. In this way, radiation safety control can be improved.

In accordance with another embodiment of the present invention, an X-ray unit includes an exit surface that is intended to be oriented toward a patient, the outlet surface being covered by a tamper cover.

It can be found that the advantage of providing this type of cap is that it can be used Has a variety of features. First, the applicator cover can be used to protect the X-ray exit surface of the X-ray device from contamination during the clinic. Secondly, the thickness of the applicator cover in the direction of extension of the x-ray beam can be selected to be sufficient to substantially eliminate electron contamination from the x-ray beam. More preferably, the cap is made of polyvinylidene fluoride (PVDF) and has a thickness of about 0.4 to 0.7 mm, more preferably 0.6 mm, across the window portion. A density of about 1.75 to 1.8, more preferably a density of 1.78. Alternatively, the cap is made of polyphenylsulfone (PPSU) and has a thickness of about 0.3 to 0.6 mm, more preferably 0.5 mm, and about 1.30 to 1.45. The density is better for a density of 1.39. It has been found that the above materials are particularly suitable for use herein due to their stability under the influence of X-rays and are suitable for different types of sterilization, such as chemical sterilization or sterilization at elevated temperatures.

It is known from the prior art that the energy of the secondary electrons emitted from the X-ray tube and the thickness required for the use of the material, such as plastic, glass, ceramics, etc., are sufficient to completely intercept such electrons. More preferably, the cap is attached to the disposable device.

Third, the treatment cover can be used as a heat absorber to reduce the temperature of the X-ray treatment device. Based on this, the patient only feels that the treatment device has only a slight warm feeling when it comes into contact with the skin, instead of being very hot. of.

More preferably, the indicator is configured to define that the X-ray beam is configurable with sufficient brightness to provide a resulting range of light through the tamper cap. Lasers can be found to be particularly suitable for this purpose. However, it is still possible to use a light-emitting diode. or Yes, configuring one or more light sources to produce a narrow beam of light outside the X-ray device can facilitate placement of the same or multiple light sources on individual support arms such that individual narrow beams are not truncated by the applicator cover .

According to another embodiment of the present invention, the X-ray unit is connected to the base by a displaceable panel, and the elastic line is routed in the displaceable panel.

It has been found to be advantageous to provide an intermediate mechanism unit to connect the base of the mobile X-ray unit to the X-ray applicator, thereby encapsulating the flexible circuit and thereby preventing the entanglement of the line. The displaceable panel can be configured to have a predetermined travel distance relative to the lowest position and the highest position. This predetermined moving distance is advantageous for increasing the durability of cable lines and lines of the X-ray unit, particularly the piping containing the refrigerant.

More preferably, the remote source is provided as a reference to the displaceable panel as described above, which may be advantageous in reducing the required length of the fiber.

According to another embodiment of the present invention, the displaceable panel includes a user interface for controlling the X-ray unit. More preferably, the user interface includes a display. For example, the display can be implemented as a touch screen configured to input data. Alternatively, the display can be configured to echo data, and any dedicated button or other suitable device can be provided to the X-ray unit for inputting data.

According to an embodiment of the invention, a method for visually defining an X-ray beam emitted by a mobile X-ray unit is provided. The mobile X-ray unit includes a base for accommodating a control unit and a power supply and further includes An articulating displaceable arm for supporting an X-ray device with an X-ray tube, X-ray tube The utility model comprises a impact target, a collimator and an exit window for generating an X-ray beam. The method comprises: providing an indicator in the X-ray device or surrounding the X-ray device for visual indication At least a portion of the X-ray beam emitted from the exit window.

More preferably, in the X-ray unit according to the present invention, the impact target and the collimator are housed in a substantially cylindrical outer casing, wherein one of the generated X-ray beams extends substantially parallel to one Vertical axis. More preferably, embodiments of the method according to the invention will be described later with reference to Figure 3a.

The above described objects, features, and advantages of the invention will be apparent from the embodiments of the invention. range.

The details disclosed in the specific embodiments of the present invention will be described in detail in conjunction with the drawings.

Figure 1a is a schematic diagram showing a mobile X-ray unit in accordance with an embodiment of the present invention. The mobile X-ray unit 10 includes a base 2 including at least one high voltage power supply unit, a cooling system, and a control unit for controlling an X-ray device (X- The operation of ray applicator 4 includes an X-ray tube housed in an outer casing. The X-ray device 4 is connected to the base 2 by a flexible cable 3 and can be at least partially housed in a displaceable panel 5. X-ray device 4 is hinged and displaceable Supported by an articulated displaceable arm 4a, which may include a pivot for changing the position of the X-ray applicator 4. More preferably, the articulated arm 4a includes a brake (not shown) for stopping the X-ray applicator 4 in a selected position in space. In one embodiment, the brake is manually controlled and is used to simultaneously switch for adjusting the light source of the X-ray charge device relative to a target area.

The X-ray device 4 includes a longitudinal axis and an exit window 8 through which the generated X-ray beam is emitted. The articulated arm 4a can also be mechanically coupled to the displaceable panel 5 to change the position of the X-ray applicator 4 in the vertical direction. More preferably, the displaceable panel 5 is provided with a handle 6, whereby it can be easily operated. The displaceable panel 5 can be guided by a suitable rail so as to be substantially smooth and shock-free when displaced.

More preferably, the X-ray tube accommodates an X-ray tube having a coaxial geometry, wherein the X-ray beam 8a is intended to illuminate a patient P A target region extending through the exit window 8 has a beam axis (not shown) that substantially corresponds to one of the longitudinal axes of the X-ray tube.

In accordance with an embodiment of the present invention, an indicator is provided to provide at least a portion of the X-ray beam 8a on the patient P when the X-ray applicator 4 is to be positioned relative to the patient P Visual indication. The light source corresponding thereto may be disposed in the X-ray treatment device 4 or surround one of the X-ray treatment devices 4, or it may be distally fixed The bit, for example, is on the base 2. In the latter example, light from a light source 8c can be directed toward the X-ray applicator using one or more suitable optical fibers.

More preferably, the displaceable panel 5 is provided with a display 7 for feeding-backing the desired user information. The display 7 can be configured with a touch-sensitive screen for inputting appropriate data to the system. For example, the display panel includes means for switching the light source indicator, or alternatively, the light source indicator can be always on when the X-ray unit is turned on.

Figure 1b is a schematic diagram showing a displaceable panel of a mobile X-ray unit in accordance with an embodiment of the present invention. In the enlarged schematic form, the component symbol 10a refers to a specific component of the displaceable panel 5. Based on this, the grip 6 can be used as a mechanical member to pull or push the displaceable panel 5. Alternatively, the grip 6 can be configured as an electronic actuator for triggering the motor (not shown) to displace the displaceable panel 5. For example, when the grip 6 is pulled to cause the motor to be activated, the displaceable panel 5 can be displaced in the direction A, and pushing the grip 6 can cause the displaceable panel 5 to be along Direction B drops. More preferably, the mobile X-ray unit includes means for limiting the displacement of the displaceable panel 5. This has the advantage of ensuring the mechanical stability (limitation of the upper level) of the system on the one hand and the limitation of the lower level on the other hand. More preferably, the displaceable panel 5 can be moved using a built-in rail, the length of which can be selected to limit the range of movement of the displaceable panel 5 in a desired manner.

According to an aspect of the invention, a light source 8c' for delineating at least a portion of the X-ray beam can be positioned in the displaceable panel, suitable for the optical fiber (not shown) It can be used to direct light from the light source 8c' towards the X-ray applicator. More detailed and appropriate light source configuration, but is not limited thereto, and will be described with reference to Figures 3a to 3c of the drawings.

The displaceable panel 5 preferably includes a display 7 that functions as a suitable user interface 7a, for example, patient information such as a photo of the patient and/or a photo of the condition. Can be displayed on the window 7b, and the related patient information such as birthday, gender, dose prescription, and dose delivery protocol can be displayed in the window 7c. on. A button 7d can provide a touch function to input data, or a suitable hardware switch or button can be provided as appropriate.

Figure 1c is a schematic diagram showing an X-ray unit with a displaceable function in accordance with an embodiment of the present invention. In accordance with one aspect of the present invention, the mechanism of the mobile X-ray unit is developed and constructed to support the X-ray applicator 4 to have a greater range of movement and rotational displacement.

Reference numeral 11 denotes a schematic embodiment in which the X-ray applicator is located in a parked position. For the sake of clarity, lines and fibers are not shown. In this position, it may be adapted to transmit the mobile X-ray unit towards a room and/or to be mobile near the patient. In order to retract the X-ray applicator as close as possible to the base 2, the hinged displaceable arm 4a is bendable under the outer portion 5a of the displaceable panel 5. In order to ensure the stability of the mobile X-ray unit during its maneuvering, A load block 2a near the floor is provided to reduce the absolute position of the gravity point of the overall structure.

Reference numeral 12 denotes a schematic embodiment in which the X-ray treatment device 4 is located in one of the working positions, having an x-ray exit surface 8 facing the patient P, in order to The X-ray applicator has a suitable position relative to the patient P, and the displaceable panel is movable to a predetermined dwell position between the lowest position and the highest position of the displaceable panel 5. The articulated arm 4a can be used to properly rotate the X-ray applicator in accordance with a rotational axis. More preferably, the choice of the axis of rotation is the imaginary direction of the X-ray beam, and the X-ray device is oriented vertically from the exit surface.

Reference numeral 13 denotes an exemplary embodiment in which the X-ray treatment device 4 is located at the lowest position, for which purpose the displaceable panel 5 can be located at its lowest position and the hinged displaceable arm 4a can be oriented to the X-ray in a desired manner. Therapy.

2 is a block diagram showing the structure of a mobile X-ray unit according to an embodiment of the present invention. The mobile X-ray unit according to the present invention comprises a high voltage supply, and more preferably, is adapted to generate 50-75 KV X-rays in a suitable X-ray tube, a cooling The system is used to cool the X-ray tube during use, and a control system is used to control the electronic and electrical parameters of the sub-unit of the X-ray unit when in use. It can be understood that the X-ray tube can also operate in the range of 50-130 KV. The component symbol 20 refers to a display control unit 21 and an X-ray treatment device (X-ray). The main unit of applicator)22.

The control unit 21 preferably includes a hard wired user interface 21a for switching the opening and closing of the high voltage supply 21b. More preferably, the high voltage supply 21b includes a high voltage generator 21c having improved ramp-up and ramp-down characteristics. More preferably, the ramp-up time is approximately 100 ms. The high voltage supply is preferably operable to provide approximately 200 watts of power for use. The hardwired user interface 21a can be configured to automatically activate a cooling system 21d when the high voltage generator is turned on. Additionally, control system 21 can include a primary controller 21e configured to control dose delivery when the X-ray device is in use. The primary controller 21e can provide a primary counter to delete the logged-in data after the X-ray radiation is initialized. This master calculator automatically shuts down the high pressure supply to the X-ray tube after reaching the established dose. More preferably, the established dose is at least dependent on the energy and dose rate at which X-rays are produced. Wherein, the above situation can be calibrated in advance, and corresponding calibration data is provided as much as possible, so that the main dose distribution control of the main controller can be achieved. More preferably, the secondary controller 21f provides an independent loop for initiating dose dispensing control, and the secondary controller 21f can be coupled to a dose meter for accommodation in the X-ray device. In the X-ray range before the collimator. Accordingly, the dose meter can be assigned to the actual dose, providing immediate data in view of changes in the dose during ramp up and ramp down of the high pressure source. Equally better, The control system may further include a safety controller 21g adapted to read data from the main controller 21e, and the secondary controller 21f turns off the high voltage generator 21c after the desired dose is dispensed. . Alternatively, or in addition, the safety controller 21g can be coupled to an emergency stop, a door interlock, and a generator interlock.

The control system can further include an indicator controller 21h for controlling the light source to define at least a portion of the X-ray beam. Although the instructing controller 21h is coupled to the power supply unit 21b to turn on the light source when the system is turned on, the structure can be simplified, and more preferably, the light source can be switched as needed. Accordingly, the instructing controller can be configured to provide power to the light source when triggered by the user, and the user can provide an appropriate trigger signal through a device such as a user interface or, for example, through a dedicated hardware switch.

The X-ray applicator 22 preferably includes the following features: an X-ray tube 22a pre-packaged in an outer shield 22k. The X-ray tube may be longitudinally disposed with an anode, wherein a collision target, a collimator and an exit window extend on mutually parallel surfaces such that the generated X-ray beam extends It is roughly parallel to the longitudinal axis of the X-ray. More preferably, the target-collimator is about 4 to 10 cm apart, more preferably about 5 to 6 cm. The X-ray treatment device may further include a beam hardening filter 22b selected to intercept low-energy radiation and a beam leveling filter (beam) The flattening filter) 22c is designed to intercept a portion of the X-ray radiation to produce a substantially flat beam profile near the exit surface of the X-ray applicator. Still further, the X-ray applicator 22 can include one or more collimator configurations to define the processing beam geometry. More preferably, a set of collimators can be used, for example, having diameters of 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5 cm. More preferably, although a circular collimator is considered here, any form of collimator such as square, elliptic or custom made collimator Can be used. It can be found that the X-ray treatment device 22 provided with the automatic collimator detection mean 22f has the advantage that it is suitable for automatically signaling the collimator in use. More preferably, resistance sensing is used wherein each collimator is provided with at least one pair of projections for bridging the resistive path provided in the collimator receptacle. The resistance generated by this chamber constitutes the signal representative of the collimator in use. The X-ray applicator 22 preferably includes a built-in temperature sensor adapted to emit temperature signals from the X-ray tube and/or its X-ray device. The signal from the temperature sensor is received by the control system and loaded with an analysis system. Once the measured temperature rises beyond the allowable range, an alarm signal is generated, optionally, a high voltage is also provided. The shutdown signal of the generator. The X-ray device 22 further includes a radiation sensor 22h disposed inside the outer casing 22k for detecting the actual X-ray radiation emitted by the X-ray tube. More preferably, based on safety factors, the X-ray device 22 can further include a non-volatile data storage. 22i, used to record the operating parameters of at least the X-ray tube. Further, in order to enhance the safety of the radiation, the X-ray treatment device 22 can provide a radiation indicator 22j to provide a visual and/or an audio output for the user and/or patient to know X. The on/off state of the light pipe. More preferably, the radiation indicator 22j may comprise a plurality of distributed signaling means. More preferably, at least one of the signal means, for example, a light emitting diode (LED) is electrically connected to the X Light therapy device 22. More preferably, the signal device is provided on the X-ray device 22.

Figure 3a is a cross-sectional view showing the X-ray device of the mobile X-ray unit according to the first embodiment of the present invention, in which the X-ray applicator 30 is included. An outer housing 36 houses an X-ray tube assembly 35 and has an external shielding 35a.

According to one aspect of the present invention, the X-ray device 30 further includes a light source 48a that cooperates with a mirror 48 to emit light, that is, a two-dimensional beam X produced by the X-ray tube. Beam analysis of light. More preferably, the X-ray has a propagation axis 45a that fits the longitudinal axis of the X-ray tube. Light source 48a and mirror 48 are configured such that the resulting beam of light can extend substantially along the longitudinal axis of X-ray tube assembly 45a.

When the formed beam is intercepted by a collimator 33, a visual indication and simulation of the two-dimensional X-ray beam intercepting the patient may facilitate accurate alignment between the X-ray therapist and the target area of the patient.

Even better, the impact target and collimator at the anode (not shown) The distance between (collimator) 33 is about 4 to 10 cm, more preferably about 5 to 6 cm, so that the relatively short impact target-collimator distance is unexpectedly suitable for generating an X-ray beam, with substantially A narrower penumbra (about 1.5-1.8 mm per 20/80% of the line) and better beam flatness. More preferably, when the anode has a longitudinal axis disposed substantially parallel to the longitudinal axis 45a of the X-ray tube 35, the impact target is generally planar and extends generally perpendicularly to the shaft 45a.

The X-ray applicator 30 further includes a filter 39 to harden the X-ray beam emitted from the impact target, a beam flattening filter 40 to flatten the beam profile, and a collimator 33, Plugged into a collimator receptacle 41.

In order to avoid overheating of the X-ray tube during use, a cooling system 34 is provided, which is advantageously disposed between the X-ray tube 35 and the external mask 35a and in contact with the surface of the X-ray tube 35. A suitable refrigerant can be provided by a pipe 31. More preferably, the refrigerant is recyclable and can be water or a compressed gas. The X-ray device may further include a temperature sensor 37.

The X-ray applicator 30 can further include a suitable radiation detector 38 coupled to a radiation indicator 43. More preferably, the data collected by the radiation detector 38 is stored to a data storage unit 44.

In order to protect the X-ray exit surface of the X-ray device 30 from contamination during the clinic, a replaceable exchange cap 42 is provided. To cover at least the exit surface of the X-ray applicator 30. More preferably, the thickness of the applicator cover is thick enough to completely intercept the secondary electrons emitted by the X-ray device. For X-ray energy sources suitable for treating 0.5 to 2 cm of surface lesions, the cap is adequate to intercept secondary electrons.

Figure 3b is a cross-sectional view showing the indicator of the second embodiment of the X-ray device of the mobile X-ray unit according to the second embodiment of the present invention. In the present embodiment, the anode 45 has a The vertical axis is disposed coaxially with the longitudinal axis 45a of the X-ray device, whereby the central axis of the X-ray beam emitted from the anode 45 is substantially matched to the longitudinal axis 45a of the X-ray device.

An optical fiber 47a is provided on the collimator chamber 41 above the collimator 33, and the optical fiber 47a is configured to generate a light field substantially centered on the opening of the collimator 33, thereby simulating the alignment A two-dimensional cross-section of the X-ray beam emitted by the spectrometer. For this purpose, the optical fiber 47a is configured to be substantially narrower than the expected X-ray beam. bundle.

Alternatively, it is possible to use an optical fiber 47a for visualizing the central axis 45a of the X-ray beam. However, the visualization of the central axis may additionally affect the visualization of the two-dimensional region of the X-ray beam. In this example, the fiber is preferably configured to emit a narrower beam source to produce a smaller spot of light on the surface of the patient. More preferably, the size of the spot is less than 5 mm ² , and more preferably the spot size is about 1 mm ² . A suitable light emitting diode or laser can be used to generate light emitted from the optical fiber 47a. More preferably, the light emitting diode and the laser are disposed remotely relative to the X-ray applicator 30. It will be appreciated that one or more light sources may be used in conjunction with one or more optical fibers in another alternative configuration.

Figure 3c is a cross-sectional view showing the indicator of the third embodiment of the X-ray device of the mobile X-ray unit according to the third embodiment of the present invention. In this embodiment, the X-ray device has an anode. 45 provides a target for generating an X-ray beam 45c having an X-ray longitudinal axis 45a, which is provided with an external indicator for use in the X-ray device. The longitudinal axis 45a is visualized in one of the pre-determined distances D. More preferably, the bottom surface 49 corresponds to an exit window as shown in FIG. 1c, or corresponds to Replaceable applicator cover as shown in Figure 4.

The external indicator includes one or more light sources 52a, 52b disposed on respective support arms 54a, 54b to produce a light beam 53a, 53b that is directed toward the longitudinal direction. The shaft 45a is adapted to meet at a predetermined distance D from the bottom surface 49 of the X-ray applicator 30. Even better, the established distance D is chosen to be between 0.5 and 2 cm. The support arms 54a, 54b are configured such that the light beams 53a, 53b are not intercepted by the X-ray applicator.

When the X-ray applicator is positioned relative to the patient P, the former must operate in such a manner that the beams 53a, 53b meet on one of the surfaces of the patient. However, when the treatment protocol should use a dose build-up material, the beams 53a, 53b can cross the surface of the dose enhancing material. More preferably, the support arms 54a, 54b are adjustable to indicate the central axis 45a at different distances from the bottom surface A9 of the X-ray applicator.

To calibrate the adjustment of the support arm, a calibration phantom can be used in which the central axis and depth have been indicated. It can be understood that although the 3a-3c diagrams respectively show indicators of different embodiments, it is also feasible to use them in combination. For example, an indicator to indicate the center axis can be combined with an indicator to indicate the full range. In addition, internal and external indicators can also be combined.

4 is a schematic view showing an X-ray device according to an embodiment of the present invention having a device cover of FIG. 3. The device cover 42 can be made of transparent glass, transparent plastic or ceramic, and the device cover can also be used. It is made of metal, although this is not optimal. In the last case, the applicator cover 42 can be sterilized. However, it is even better to use a disposable heat treatment device cover. In the fourth diagram, the symbol 50 indicates that the outer diameter of the X-ray applicator 51 is larger than the outer diameter of the outlet portion, and is covered by the replaceable medical device cover 42. Although this embodiment can reduce the total weight of the X-ray applicator, the outlet portion can be the same diameter as the body of the X-ray applicator 51.

Figure 5 is a schematic diagram showing a collimator having identification means in accordance with an embodiment of the present invention, the collimator 63 is provided with a central opening 64 to define The shape and size of the X-ray beam emitted by the X-ray device 30 of the figure. The collimator 63 is adapted to be housed in a collimator receptacle 61 which can be shaped as a suitable chamber so that the collimator 63 can be stably fixed. In order to be able to have an automatic collimator identification, the collimator has two projections 65a, 65b adapted to be supplied to the collimator compartment 61. The resistive path 62 cooperates, and when the protrusions 65a, 65b are in contact with the resistive path 62, the net resistance of the collimator chamber will vary. The change in resistance of the collimator chamber can be used as an automatic identifier for the collimator to be inserted into the collimator chamber. More preferably, for a set of collimators, each collimator needs to have a unique pair of protrusions to distinguish the change in the net resistance of the collimator chamber. It is known from the known art that the plurality of pairs of projections 65a, 65b can have different relative positions on a surface of the collimator. Alternatively, each collimator may be provided with an electronic identification device, for example, a wafer having a plug, when the pin is inserted into the collimator chamber (provided with a corresponding socket), the collimator The identification device will be in electrical communication with the control unit of the mobile X-ray unit.

Fig. 6 is a view showing an indicator according to another embodiment of the present invention. In the present embodiment, an indicator 126 may be provided on one side surface of the X-ray tube or the X-ray tube 35, and the indicator 126 A light emitting diode or other suitable light source can be included. The light generated from the indicator 126 is affected by a reflective surface of an X-ray collimator 132, after which the light is further reflected by a reflective surface 134, thereby becoming independent beams B1 and B2, oriented The central axis of the X-ray tube X. Advantageously, the X-ray tube 35 is suitable for forming and manufacturing to provide a reflective body 134, which may be a concentric reflective ring connected to a corresponding recess of the X-ray tube. .

More advantageously, the reflective surface 132 can advantageously be provided on a collimating instrument surface facing away from the patient toward the X-ray source (not shown), disposed on the axis X on. Thus, the prior art knows how to configure the collimator and the X-ray tube, as shown in Fig. 3, so that the structure as discussed in Fig. 6 is feasible. One of the light spots produced by indicator 126 as previously described can be used to accurately position X-ray tube 35 relative to patient P.

More advantageously, the spatial position of the intersection between the beams B1 and B2 can be selected to provide a minimum spot on the X-ray device from the receiving X-ray tube 35 ( One of the outer surfaces of one of the outer surfaces is not shown. For example, the predetermined distance can be chosen to be 1, 2, 3, 4, 5 centimeters from the surface of the X-ray device. In this way, accurate alignment between the desired treatment area on the patient P and the central axis of the X-ray beam can be controlled and maintained. More preferably, the predetermined distance can be selected from the outer surface of the X-ray device to be about 2 to 3 cm so that the X-ray device has a maneuvering line without the risk of contact with the patient. When the X-ray applicator is placed relative to the patient P, it is possible to further utilize suitable precision mechanical positioning using the articulated arm 4a and the indicator as shown in Fig. 1a. Another suitable implementation of precision mechanical positioning is shown in Figure 7.

More advantageously, when the indicator and reflector are referenced to the X-ray tube 35, it is possible to achieve a smaller configuration of the connection indicator 126 to one of the outer surfaces of the tamper 4a as shown in FIG. In this case, a special reflector can be used instead of using a collimator for reflection purposes.

Fig. 7a is a schematic view showing a precision adjusting device in the axial direction of an X-ray applicator according to an embodiment of the present invention. In this embodiment, the X-ray device 4 is provided with a sleeve 9 having a rotating portion (rotating) Portion 9a, the rotating portion 9a includes a suitable mechanism for connection with the X-ray device to move in the axial direction.

In use, when the X-ray applicator is in place using the hinged displaceable arm 4a provided with a rotational joint 6a, it is coupled to the base of the mobile X-ray unit of the present invention, and A ball joint 6b is provided for connection to the aforementioned X-ray treatment device and indicator. The position indicator is used to determine the position of the medicinal device by means of a built-in actuator (not shown) provided in the joints 6a, 6b.

Thereafter, the rotating portion 9a can be moved to displace the X-ray tube in the axial direction. In this way, the X-ray device can gradually approach the target area. More preferably, the rotating portion 9a is adapted to allow movement at a distance of 1 to 4 cm.

Figure 7b is a schematic view showing the elevation of the device in Figure 7a, and in Figure 7b is a displacement mechanism for sliding the X-ray device 4 in the axial direction, which may include a rotating body 9a, a connection An adapter 19a is used to connect the X-ray applicator with a screw mechanics 19 and a holder 9 to be mechanically coupled to the articulated arm 4a.

However, other ways of axially moving the X-ray applicator are also possible, including but not limited to telescopic means.

Figure 8 is a schematic view showing an X-ray tube according to another embodiment of the present invention, and Figure 8E-E is a schematic longitudinal sectional view showing an X-ray device of an embodiment, and Figure 8F-F is shown as Figure 8E. The embodiment of the -E diagram shows a cathode. The X-ray tube 100 has a body 102, one end is a closed end, and the other end is an end window 104, X-ray. This is worn out. The end window is made of thin sheet of Beryllium. The end window 104 is covered by an applicator cap 106 to protect the window portion from damage and to protect against metal toxic effects. The applicator cover 106 is preferably made of a plastic material.

In the tube body 102, a strike target 108 is located about 4 to 10 cm from the collimator 130, and more preferably about 4 to 6 cm from the collimator 130, see the 8F. -F map. The impact target 108 is fabricated from Tungsten metal to provide the desired X-ray spectrum. The tungsten tip of the impact target is mounted on a large anode assembly 110, which is also provided as a function in the impact target 108 to conduct heat generated by the generation of X-rays. Most anode assemblies are made of copper. The cathode 112 is located slightly off-axis near the end window, and the electrons emitted from the cathode are accelerated across the potential difference between the cathode and the anode, which is set to about 70 KV in this example, and reaches the impact target as in the prior art. 108, where the X-ray is struck and X-rays are generated, and the X-rays emitted from the impacting target 108 are subjected to a beam hardening before passing through the collimator 130 and passing through an exit surface 124 on the medicated cap 106. Beam hardening filter 122. The collimator 130 can be mounted on a suitable collimator receptacle 128.

The anode assembly 110 is mounted in the body 102 and is electrically insulated. Several known techniques and conventional materials can be used to provide the desired degree of insulation between the anode and the body 102.

As is known in the art, the generation of X-rays generates a large amount of waste heat, and therefore, it is necessary to maintain the tube cooling below a safe temperature. A variety of cooling mechanisms have been Well known and can be used. In this embodiment, the cooling of the tube is cooled by means of water forced around the anode region, the water entering the back of the tube by means of a conduit 116 device, and by means of a second conduit 118 device go away. The water cooling circuit is a closed loop circuit with a remote cooler (not shown) before the water leaves the tube to be cooled and before the return tube. Alternatively, oil or other fluids may be used as a cooling medium. In some applications, compressed gas can also be used as an effective coolant.

As in the prior art, X-rays are generated and emitted in all directions, except for the shelter of the tube body 102 and other internal component shields, thereby minimizing the amount of radiation from the tube body and making more radiation. Shoot from the end window. The thickness of the shield provided by the tube body is designed to at least provide the minimum level of shading required for safe use by the operator.

A high voltage cable assembly 120 is coupled to the anode assembly 110. The high voltage line assembly is connected to a flexible cable means (not shown) which is in turn connected to the high voltage power supply.

A radiation detector 114 is disposed outside the path of the X-ray beam exiting the impact target 108 to the end window 104. The detector can be any known radiation detector. In this embodiment, it is connected to an amplifier using a conventional radiation hardened semi-conductor. When the tube body 102 operates and emits X-ray energy, the radiation detector 114 begins to detect. The output of the detector is connected to a control unit. The signal thus output can be provided as an optical indication to confirm whether the X-ray tube is in operation. The device can provide an X-ray detector for detecting whether the X-ray tube is activated or deactivated.

The radiation detector 114 is further calibrated to control the determination of the arrival of the patient and calculate the X-ray dose during the course of treatment. This device can have an instant dose control system whereby the precise dose of radiation can be determined. Once the dose rate can be determined, the treatment schedule can be adjusted. This has the advantage of achieving an accurate and precise X-ray dose control that is to be controlled.

In order for the tube 102 to be properly placed on a tumor, a tumor illumination device is used. The tumor illumination device can include a plurality of light sources 126 placed at the periphery of the tube near the end window. When used, the light from the source is on the patient's skin. Since the light source 126 is located around the circumference of the tube body 102, a small distance from the end of the tube, a circle of light is created, the interior of which is empty. In this way, the position of the light creates a shadow at the tube body 102. This shaded circle is used to indicate the area where the target is radiated when the X-ray tube is activated. The inside of the circle will not be completely black, as ambient light will enter this shaded area.

More preferably, the light source 126 is a white LED that is bright enough to clearly illuminate the target area without excessive heat generation and a long lifetime. It is important to have no heat generated because the source is very close to the patient's skin and, as importantly, the risk of skin burns or other damage can be minimized. Light-emitting diodes of other colors can of course also be used. Or you can use other light The source, such as a conventional filament lamp, or even a remote light, is connected to a ring by a fiber optic cable.

The present invention has been described above with reference to the preferred embodiments thereof, and is not intended to limit the scope of the present invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

2‧‧‧Base

2a‧‧‧Load block

3‧‧‧flexible cable

4‧‧‧X-ray applicator

4a‧‧‧ articulated arm (articulated displaceable arm)

5‧‧‧Displaceable panel

5a‧‧‧outer portion

6‧‧‧Handle

6a‧‧‧Rotary joint

6b‧‧‧ball joint

7‧‧‧Display

7a‧‧‧user interface

7b‧‧‧window

7c‧‧‧window

7d‧‧‧ button (button)

8‧‧‧Exit window/exit surface

8a‧‧‧X-ray beam

8c‧‧‧light source

8c’‧‧‧light source

9‧‧‧Sleeve

9a‧‧‧rotating portion/rotating body Body)

10‧‧‧mobile X-ray unit

19‧‧‧screw mechanics

19a‧‧‧Connector

21‧‧‧control unit

21a‧‧‧user interface

21b‧‧‧high voltage supply

21c‧‧‧high voltage generator

21d‧‧‧Cooling system

21e‧‧‧primary controller

21f‧‧‧secondary controller

21g‧‧‧safety controller

21h‧‧‧Indicator controller

22‧‧‧X-ray applicator

22a‧‧‧X-ray tube

22b‧‧·beam hardening filter

22c‧‧·beam flattening filter

22d‧‧‧collimator

22e‧‧‧applicator cap

22f‧‧‧Automatic collimator detection Mean)

22g‧‧‧ housing temperature sensor

22h‧‧‧radiation sensor

22i‧‧‧non-volatile data storage

22j‧‧‧radiation indicator

22k‧‧‧outer shielding

30‧‧‧X-ray applicator

31‧‧‧pipe

33‧‧‧collimator

34‧‧‧Cooling system

35‧‧‧X-ray tube assembly

35a‧‧‧External shielding

36‧‧‧outer housing

37‧‧‧temperature sensor

38‧‧‧radiation detector

39‧‧‧Filter

40‧‧‧beam flattening filter

41‧‧‧collimator receptacle

42‧‧‧Applicator cap

43‧‧‧radiation indicator

44‧‧‧data storage unit

45‧‧‧Anode

45a‧‧‧propagation axis/longitudinal Axis)

45c‧‧‧X-ray beam

47a‧‧‧optical fiber

48‧‧‧Mirror (mirror)

48a‧‧‧light source

49‧‧‧lower surface

51‧‧‧X-ray applicator

52a, 52b‧‧‧light source

53a, 53b‧‧‧light beam

54a, 54b‧‧‧support arm

61‧‧‧collimator receptacle

62‧‧‧resistive path

63‧‧‧collimator

64‧‧‧central opening

65a, 65b‧‧‧projection

100‧‧‧X-ray tube

102‧‧‧ body

104‧‧‧End window

106‧‧‧Applicator cap

108‧‧‧ impact target (target)

110‧‧‧Anode assembly

112‧‧‧cathode

114‧‧‧radiation detector

116‧‧‧catheter (conduit)

118‧‧‧second conduit

120‧‧‧High voltage cable assembly

122‧‧‧beam hardening filter

124‧‧‧Exit surface

126‧‧‧indicator/light source

128‧‧‧collimator receptacle

130‧‧‧collimator

132‧‧‧X-ray collimator

134‧‧‧reflective surface/reflector Body)

D‧‧‧pre-determined distance

P‧‧‧patient

X‧‧‧central axis

1a is a schematic view showing a mobile X-ray unit according to an embodiment of the present invention; FIG. 1b is a schematic view showing a displaceable panel of a mobile X-ray unit according to an embodiment of the present invention; FIG. 2 is a schematic diagram showing the structure of a mobile X-ray unit according to an embodiment of the present invention; FIG. 3a is a schematic diagram showing the structure of a mobile X-ray unit according to an embodiment of the present invention; The X-ray device of the mobile X-ray unit of the first embodiment is depicted in a cross-sectional view of the indicator of the first embodiment; and FIG. 3b shows the X-ray of the mobile X-ray unit according to the second embodiment of the present invention. The treatment device is depicted in cross-section of the indicator of the second embodiment; and the third embodiment shows a mobile X-ray according to the third embodiment of the present invention. The X-ray device of the present invention is a schematic cross-sectional view of the indicator of the third embodiment; and FIG. 4 is a schematic view showing the X-ray device of the embodiment of the present invention having the device cover of FIG. 3; 5 is a schematic view showing a collimator having an identification means according to an embodiment of the present invention; FIG. 6 is a view showing an indicator according to another embodiment of the present invention; and FIG. 7a is a view showing the basis of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 7b is a schematic diagram showing the elevation of the apparatus in the axial direction; FIG. 7b is a schematic diagram showing the elevation of the apparatus in FIG. 7a; FIG. 8 is a diagram showing another embodiment of the present invention. A schematic view of an X-ray tube; a 8E-E diagram showing a longitudinal cross-sectional view of an X-ray treatment device of an embodiment; and an 8F-F diagram showing an embodiment shown in Figures 8E-E showing a cathode.

2‧‧‧Base

3‧‧‧flexible cable

4‧‧‧X-ray applicator

4a‧‧‧ articulated arm (articulated displaceable arm)

5‧‧‧Displaceable panel

6‧‧‧Handle

7‧‧‧Display

8‧‧‧Exit window/exit surface

8a‧‧‧X-ray beam

8c‧‧‧light source

10‧‧‧mobile X-ray unit

P‧‧‧patient

Claims (32)

A mobile X-ray unit includes a base for accommodating a control unit and a power supply, and further comprising a hinged displaceable arm for supporting an X-ray device having an X-ray tube, An X-ray device is coupled to the base, wherein the X-ray tube includes a collision target for generating an X-ray beam, a collimator for molding the X-ray beam generated, and an exit surface. The X-ray beam is permeable during use, wherein the mobile X-ray unit further includes an indicator for providing at least a portion of the X-ray beam emitted from the exit surface. Instructions. The mobile X-ray unit of claim 1, wherein the indicator comprises a light source. The mobile X-ray unit of claim 2, wherein the indicator comprises an array of light sources arranged concentrically around the X-ray device. The mobile X-ray unit of claim 3, wherein the X-ray beam has a longitudinal axis, and each light source is configured to be spaced apart from the exit surface of the X-ray device by a predetermined distance. The beam is directed towards the longitudinal axis. The mobile X-ray unit of claim 2, wherein the indicator comprises a light source housed in the X-ray device for generating a beam preset by the collimator ( Intercepted) to provide a light image of one of the X-ray fields emitted from the exit surface. A mobile X-ray unit as described in claim 2, The indicator includes a light source and an optical fiber configured to provide light from the light source for interception by the collimator. The mobile X-ray unit of claim 6, wherein the indicator comprises a plurality of optical fibers distributed in an area of the X-ray treatment device above the collimator for illuminating a standard The spectrometer opening allows the collimator opening to intercept a range of resulting light. The mobile X-ray unit of claim 2, wherein the indicator comprises a light source, emits a narrow beam, and is disposed inside or outside the X-ray device to define the X-ray beam. One of the vertical axes. The mobile X-ray unit of any one of claims 2 to 8, wherein the light source is a light emitting diode or a laser. The mobile X-ray unit of any of claims 2-9, wherein the indicator is configured to provide at least a portion of a contrast image of the X-ray beam. The mobile X-ray unit of any one of claims 1 to 10, wherein the collimator provides an automatic identification device to generate a signal corresponding to the characteristics of the collimator and transmit to A control unit. The mobile X-ray unit of claim 11, wherein the collimator is provided in a chamber having a resistance path, the collimator being provided with the protrusion and the resistor of the chamber The paths cooperate to generate the signal. The mobile X-ray unit of claim 12, wherein the collimator is replaceable, and the mobile X-ray unit comprises a set of collimator each corresponding identification device. The mobile X-ray unit of any one of claims 1 to 13 further comprising a signal device for indicating the generation of the X-ray beam. The mobile X-ray unit of claim 14, wherein the signal device further comprises a light indicator disposed on an outer casing. The mobile X-ray unit of any one of claims 1 to 15, wherein a radiation detector is provided to the outer casing for detecting the X-ray beam. The mobile X-ray unit of claim 16, wherein the radiation detector is configured to generate a control signal according to the generated X-ray beam. The mobile X-ray unit according to any one of claims 1 to 17, further comprising a temperature sensor for measuring the X-ray tube and/or the X-ray treatment device The actual temperature of part of the surface. The mobile X-ray unit according to any one of claims 1 to 18, wherein the X-ray device comprises an exit surface, which is intended to face a patient, and the X-ray unit further comprises a heat treatment device. a cover for covering at least the outlet surface. The mobile X-ray unit of claim 19, wherein the illuminator cover is disposable. The mobile X-ray unit of claim 19 or 20, wherein a thickness of the heat treatment cover is sufficient in a direction in which one of the X-ray beams extends to substantially eliminate the X from the X-ray beam. Electron contamination of the light beam. The mobile X-ray unit according to any one of claims 1 to 21, wherein the power supply is operable in a range of 60 to 75 kV for generating the X-ray beam. The mobile X-ray unit of claim 22, wherein the power supply is operable to provide about 200 W of power when in use. The mobile X-ray unit according to any one of claims 1 to 23, wherein the X-ray device is connected to the base by a displaceable panel, and the elastic circuit wiring is located substantially at the In the displacement panel. The mobile X-ray unit of claim 24, wherein the light source is disposed in the base or the displaceable panel, as claimed in claim 6 or 7. The mobile X-ray unit of claim 24 or 25, wherein the displaceable panel comprises a user interface for controlling the mobile X-ray unit. The mobile X-ray unit of claim 26, wherein the user interface comprises a display, more preferably a touch screen for inputting data. The mobile X-ray unit of any one of claims 1 to 27, wherein the indicator is configured to illuminate a two-dimensional surface portion of the X-ray beam by illumination. A method for visually defining an X-ray beam emitted by a mobile X-ray unit, the mobile X-ray unit comprising a base for accommodating a control unit and a power supply and further comprising an articulated displaceable arm For supporting an X-ray treatment device having an X-ray tube, the X-ray tube includes a collision target, and a a collimator and an exit window for generating an X-ray beam, the method comprising the steps of: providing an indicator to or surrounding the X-ray device for visually illuminating from the exit At least a portion of the surface illuminated by the X-ray beam emitted by the window. The method of claim 29, wherein a light source is used as the indicator. The method of claim 30, wherein the light source is configured to produce a range of light presets that is intercepted by a collimator opening to provide a two-dimensional area indication of the X-ray beam. The method of claim 31, wherein the light source is further configured to delineate one of the longitudinal axes of the X-ray beam.