HU195100B - Device for spatial representation and visualizing isotope concentrating in the human organism - Google Patents

Abstract

The present invention relates to a device for spatial mapping and visualization of a prostate isotope in the human body comprising a rack system (14), a movable arm (3) arranged thereon, a shield (1) attached to the arm (3), and a counterweight (10), in which the shield (10) is provided. 1) a scintillation gamma camera detector is connected, which is connected to a computer data processing and display unit (27), a table top (20) mounted on a carriage (17) along a longitudinal axis of the racking system (14) along a longitudinal axis. It is an object of the present invention that the arm (3) is fork-shaped, in which the shielding (1) is held by a motor-driven bearing (2), the lever (3) is also driven by a motor-driven bearing (4) and a radially bearing carriage (5). connected to the main disc (8), the radial actuator (7) is coupled to the carriage (5) via a spindle (6); the counterweight (10) is radially bearing and coupled to the carriage (5) by means of pantograph arms (9); connected to the rack system (14) by means of a bearing (13) arranged in the rotational plane of the main disc (8) and equipped with a rotational motor (12) through the gear transmission (11) (Figs. 1a and 1b) -1-

Description

It is an object of the invention that the arm (3) is shaped as a fork into which the shield (1) is clamped by a motor-driven bearing (2), the arm (3) also via a motor-driven bearing (4) and a radially oriented carriage (5). connected to the wheel (8), the carriage (5) is connected by a spindle (6) to a radial drive motor (7); the counterweight (10) is mounted radially and connected to the carriage (5) by pantograph arms (9); it is connected to the rack system (14) by means of a bearing (13) arranged in a plane of rotation of the main pulley (8) and provided with a circular actuator (12) via a gear transmission (11). (I.a and

Figure l.b)

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FIELD OF THE INVENTION The present invention relates to an apparatus for spatial imaging and imaging of an isotope enriched in the human body, particularly for medical diagnostic purposes, capable of determining and displaying the incorporation and spatial arrangement of isotope-labeled compounds in the human body.

In isotope diagnostics, a scintillation gamma camera detector is used to determine the planar projection of the isotope distribution. The scintillation gamma camera detector is arranged in a shield mounted on a movable arm mounted on a rack system, where a counterweight is attached to the other end of the arm. In order to achieve the proper shielding effect, that is, to reduce the effect of the background radiation, large shields of 400 to 500 kg are used, which should be kept stable relative to the patient during the study.

By connecting the output of the gamma camera detector to a computer, a change in activity over time in the planar projection of the isotope distribution can be monitored.

In some cases, it is not enough to have a part of the human body, but a full body imaging is required. This is known by moving the patient table beneath the detector by means of a motor, generally along the longitudinal axis of the table.

It is known that spatially isotope distribution can be reconstructed from a computer using multiple-directional detector rotations around a patient. This is one type of emission tomography.

A disadvantage of the known devices is that they require the use of separate devices for the investigation of the temporal change of the planar image, for the whole-body imaging and for the spatial imaging, possibly combining two functions. This does not ensure optimum utilization of the large vein, wide gamma camera detector and computer imaging system. In addition, the shielding and counterbalancing at both ends of a lever operating on the "boom fountain principle" can swing in circular motion or step-by-step motion, which is a problem when imaging, i.e. reconstructing, isotope distribution.

SUMMARY OF THE INVENTION The object of the present invention is to provide an apparatus which is capable of simultaneously performing the above-mentioned three tasks and which is not subject to the risk of shielding including the gamma camera detector.

The object is achieved by providing an apparatus comprising a scaffolding system, a movable arm disposed thereon, a shield attached to the arm, and a counterbalance comprising a scintillation gamma camera detector connected to a computer data processing and display unit along a longitudinal axis of the scaffolding system. a sliding table top mounted to the car is connected during shading.

It is an object of the invention that the arm is fork-shaped, in which the shading is clamped by a motor-driven bearing, the arm is also connected to the main disc via a motor-driven bearing and a radially-mounted carriage, the carriage being connected by a spindle it is bearing and connected to the car by pantograph arms; it is connected to the rack system by means of a bearing arranged in the plane of rotation of the main pulley and is provided with a circular actuator via a gear transmission.

In a preferred embodiment of the apparatus according to the invention, the table top is mounted on a trolley with telescopic racks which are connected to the rack system rigidly attached to the rack system by rollers.

It is further preferred that the rail system is provided with a table drive motor which is connected to the carriage by a releasable link through an endless chain.

The device according to the invention can preferably be configured so that the gamma camera detector has x, y and z coordinate outputs, is connected via a bidirectional link between the circular motor and the table motor with a motion controller, preferably a DC motor controlling analog servo system. with an output of a data processor and display unit, analogue outputs via analog / digital converters to a totalizer position summary input, gamma camera detector outputs connected to a totalizer image summing input, its outputs to a computer data processing and display unit display controller input, and data input.

The apparatus according to the invention will now be described in more detail with reference to the accompanying drawing, in which:

1 and 1b are front and side views, respectively, of the apparatus according to the invention without the patient support table; the

Figure 2 is a side view of the apparatus of the invention with the patient support table; the

Figure 3 is a schematic diagram of the electrical circuitry of the apparatus according to the invention.

Figures 1a and 1b show shielding 1 which engages arm 3 via a motor bearing 2. The arm 3 is designed as a fork, in which the shield 1 can be rotated about the axis of the bearing 2 in the directions indicated by the arrow. The opposite end of the arm 3 is shielded by a motor-driven bearing 4 mounted on a carriage 5, which is mounted on the main disc 8 by means of a salt 6 or-2195100 and is connected to the spindle 6 by a radially moving motor 7.

The carriage 5 is connected to the counterweight support 10 by pantograph arms 9 so that the main disc 8 is aligned independently of the radius of the circle described by the shielding 1. The main disk 8 is connected to a racking system 14 via bearings 13 arranged in the plane of balancing (i.e. pantograph arms 9), the latter having the bearings 13 fixed so that through the racking system 14 and the main disk 8 there is a hole of such a diameter. The patient lying on the tabletop 20 shown in FIG.

The main disc 8 is connected via a gear gear 11 to a circular drive motor 12 for moving it at a variable speed, continuously or stepwise.

Figure 2 is a side view of the apparatus of the present invention, with the patient support table, where, under the .1 shield, is a table top 20 lying half on telescopic racks 19. The telescopic racks 19 are mounted on a trolley 17 which is connected to a table motor 18 via an endless chain 16. The carriage 17 is provided with rollers 15a which fit into the rail system 15, and the carriage 17 is provided with a clamp 21 for fixing the carriage 17 to the endless chain 16 in any position. When the clamp 21 is released, the carriage 17 can be freely rolled on or off the rail system 15.

Figure 3 is a schematic diagram of the electrical circuitry of the apparatus according to the invention, comprising the following elements:

A. The motors 12 and 18 are connected to a motion controller 23 via a bidirectional connection, the motion controller 23 preferably being a DC servo analog servo system having a control input 28 via a cable 27 with a computer data processing and display unit output, analog outputs 29 and 30 via analog / digital converters they are connected to position summary input.

In Figure 3, the electronics of the gamma camera detector 1 in the shield are shown separately for clarity and referenced 31. The gamma camera electronics 31 thus has three x, y, and z coordinate outputs connected to the summing unit input 25, its outputs being connected to the computer data processing and display unit display control input 27 and its data inputs.

Finally, Figure 3 illustrates that the x and y inputs of the oscilloscope screen 26 are connected to the outputs of the summing unit 25. The motor 18 is preferably provided with photodiode 22 and the motor 12 is equipped with photodiode 24 which pulses the position of the table top 20.

The apparatus according to the invention operates as follows:

The gamma camera detector 1 in the shield 1 mimics the nuclear signals emitted by the subject by the collimator system (not shown) associated with the shield 1 on the surface of the detector. The detector 1 and its shield 1 are rotated by means of a motor bearing 2 in a fork-like arm 3, for example in the case of a sitting patient. Can the axis of the shield 1 be moved in the plane of the racking system 14 by means of a motor-driven bearing 4? These two movements are required for conventional gamma camera detector tests. The bearings 2 and 4 are secured for full-body inspection and emission tomography.

The radial position of the carriage 5 is adjusted via the spindle 6 by the radial drive motor 7. This setting provides a mapping of the test organ to the appropriate circular path.

In the case of a full-body examination, the distance between the tabletop 20 and the shade 1 can be adjusted by moving the telescopic racks 19 or the spindle 6, depending on the body size of the subject. The carriage 17, which holds the table top 20 and the telescopic racks 19, can be freely rolled on the rail system 15 or pulled down on the rail system 15 for examination of a seated patient. For a full body test, the carriage 17 is placed back on the rail system 15 and can be secured anywhere on the endless chain 16 by means of the clamp 21. Thus, the patient table 20 can be pushed through the gamma camera detector 1 at the desired speed by the table motor 18. Advantageously, the tabletop 20 can be moved by manual control so that positioning of the patient is achieved in other measurements.

Movement of the detector in a circular path and movement of the patient support table 20 is performed by motion controller 23, which receives command signals via cable 28 from computer processing and display unit 27. These signals start the movement, determine the continuous or incremental mode of rotation, the rotational and linear table speed, and the number of steps. According to the command, the motion controller 23 drives, by means of accelerating and decelerating signals, the circular actuator 12, which is a DC motor. On the distance traveled, the angular positioning diode 24 provides feedback to the motion controller 23. Similarly, the motion controller 23 drives the table motor 18, the position of which is indicated by a pulse-emitting photodiode 22.

The signals of the gamma camera detector located in the shield 1 are processed by the gamma camera electronics 31, which normally sends X, Y, and DD signals through the summing unit 25 to the screen of the oscilloscope 26 and 3.

-3195100 for the 27 computing and display units. In full-body mode, the table position is fed to the summing unit 25 via a digital / analog converter 29, where it is added to the multiple output signals of the gamma camera electronics 31. Thus, the summed signal is placed on the screen of the oscilloscope 26 and the computer data processing and display unit 27.

In the emission tomography mode, the signals from the camera electronics 31 directly pass through the summing unit 25 and the computer 27 also receives the digital circular and table positions of the motion controller 23.

Claims (4)

An apparatus for spatially imaging and displaying an isotope enriched in the human body, comprising a rack system, a movable arm disposed thereon, a shield attached to the arm, and a counterbalance, wherein the shield comprises a scintillation gamma camera detector coupled to a computer data processing and display unit. attached to a rack system along a longitudinal axis thereof, a sliding table mounted on a car, slidably disposed during shading, characterized in that the arm (3) is fork-shaped in which the shield (1) is clamped by motor-driven bearings (2) connected via a motor-driven bearing (4) and a carriage (5) with radial direction bearing to the main pulley (8), connected to the carriage (5) by a spindle (6), a radial drive motor (7); the counterweight (10) is mounted radially and connected to the carriage (5) by pantograph arms (9); it is connected to the rack system (14) by means of a bearing (13) arranged in a plane of rotation of the main pulley (8) and provided with a circular drive motor (12) via a gear gear (11). Apparatus according to Claim 1, characterized in that the table top (20) is mounted on the carriage (17) by means of viscous racks (19) which are rollers (15a) rigidly attached to the rack system (14). is connected. Apparatus according to claim 2, characterized in that the rail system (15) is provided with a table moving motor (18) which is connected to the carriage (17) by means of an endless chain (16) which is releasably connected. Apparatus according to claim 3, characterized in that the gamma camera electronics (31) connected to the gamma camera detector has x, y and z coordinate outputs, the bidirectional motor (12) and the table motor (18) being bidirectional connected via a connection to a motion controller (23), preferably an analog servo system controlling a DC motor, the control input of which is via the computer data processing and display unit (27), its analog outputs via analog / digital converters ³⁰ (29, 30), the outputs of the gamma camera electronics (31) are to the image summary inputs of the summing unit (25) 35, its outputs are connected to the display controller inputs and data inputs of the computer data processing and display unit (27).