JP2016073331A - X-ray imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray imaging device capable of moving an arm to the nearest position where an X-ray tube or an X-ray detector does not interfere with a medical examination table or an operation part, corresponding to the position of the operation part.SOLUTION: A control part 50 includes a moving amount regulation part 51 for regulating the moving amount of a C-type arm by a movement mechanism 54 in order to prevent interference of an X-ray tube 11 or an X-ray detector 12 with a medical examination table or an operation part 19, and a moving amount correction part 52 for correcting the moving amount of the C-type arm regulated by the moving amount regulation part 51 based on a fitting position of the operation part 19 detected by a switch 41.SELECTED DRAWING: Figure 4

Description

  The present invention provides an examination table on which a subject is placed, an operation unit movably mounted on the examination table, and an arm that supports an X-ray tube and an X-ray detector in a state of facing each other. And an X-ray imaging apparatus.

  In such an X-ray imaging apparatus, for example, it is necessary to prevent a collision between an X-ray tube or an X-ray detector supported by a substantially C-shaped C-arm and an examination table or an operation unit. Therefore, in such an X-ray imaging apparatus, in order to prevent interference between the X-ray tube or X-ray detector supported by the C-type arm and the examination table or the operation unit, the movement amount of the C-type arm is set to be small. The regulation structure is adopted.

  In Patent Document 1, an X-ray irradiation X-ray tube and a transmitted X-ray detection X-ray detector are opposed to each other in a three-dimensional outer shape of an X-ray imaging mechanism provided at both ends of a support arm. Shape data registration means for registering the corresponding 3D model outline data and 3D model outline data corresponding to the outline shape of the examination table, the current position of the X-ray imaging mechanism, the 3D model outline data, and the position of the examination table Position relation obtaining means for obtaining in real time relative positional relation information between the X-ray imaging mechanism and the examination table based on the three-dimensional model outline data and the X-ray obtained by the position relation obtaining means An X-ray imaging apparatus including an imaging system movement control unit that controls an X-ray imaging system movement mechanism in consideration of relative positional relationship information between an imaging mechanism and an examination table is disclosed. In this X-ray imaging apparatus, the three-dimensional model outline data is tree-structured data based on voxel format data. According to such an X-ray imaging apparatus, there is an effect that the X-ray imaging mechanism can be surely avoided from contacting the examination table.

Japanese Patent No. 4470509

  The X-ray imaging apparatus described in Patent Document 1 is excellent in that it is possible to reliably avoid the X-ray imaging mechanism coming into contact with the examination table, but various operations of X-ray imaging are performed. When the operation unit for performing the movement is movable with respect to the examination table, there is still room for improvement.

  FIG. 7 is an explanatory diagram showing a regulating operation for regulating the movement amount of the C-arm in the conventional X-ray imaging apparatus.

  As schematically shown in this figure, the X-ray tube 11 and the X-ray detector 12 are supported by a C-type arm 14. An operation unit 19 for performing various operations is arranged to be movable with respect to the examination table 18. In the conventional X-ray imaging apparatus, as shown in FIG. 7A, the movement of the C-arm 14 is restricted so as to stop before the X-ray tube 11 collides with the operation unit 19, for example.

  In such a configuration, as shown in FIG. 7B, when the operation unit 19 is moved laterally along the examination table 18 from the position shown in FIG. The movement is restricted at the same position as that in FIG. For this reason, the degree of freedom of imaging decreases, and time is required for the X-ray imaging operation.

  The present invention has been made to solve the above-described problems, and according to the position of the operation unit, the arm is moved to a marginal position where interference between the X-ray tube or X-ray detector and the examination table or operation unit occurs. An object of the present invention is to provide an X-ray imaging apparatus that can be used.

  According to the first aspect of the present invention, the examination table on which the subject is placed, the operation unit movably mounted on the examination table, and the X-ray tube and the X-ray detector face each other. An arm that is supported in a state; a moving mechanism that moves the arm; and the movement of the arm by the moving mechanism to prevent interference between the X-ray tube or the X-ray detector and the examination table or the operation unit. An X-ray imaging apparatus comprising: a movement amount regulating unit that regulates the amount; a position detection mechanism that detects a mounting position of the operation unit with respect to the examination table; and a mounting position of the operation unit detected by the position detection mechanism And a movement amount correction unit that corrects the movement amount of the arm regulated by the movement amount regulation unit.

  According to a second aspect of the present invention, in the first aspect of the present invention, the operation unit is slidably attached to a rail attached to the examination table, and the position detection mechanism is the rail. It is a switch which detects the position of the said operation part with respect to.

  According to invention of Claim 1 and Claim 2, according to the position of an operation part, an arm is moved to the last position where interference with an X-ray tube or an X-ray detector, and an examination table or an operation part arises. It becomes possible.

1 is a schematic diagram of an X-ray imaging apparatus according to the present invention. It is a top view of the examination table. 3 is a perspective view of an operation unit 19. FIG. It is a block diagram which shows the control system of the X-ray imaging apparatus which concerns on this invention. In the X-ray imaging apparatus which concerns on this invention, it is explanatory drawing which shows the control operation | movement which controls the movement amount of a C-type arm. It is a schematic diagram which shows other embodiment of the X-ray imaging apparatus which concerns on this invention. It is explanatory drawing which shows the control operation | movement which controls the movement amount of a C-type arm in the conventional X-ray imaging apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of an X-ray imaging apparatus according to the present invention.

  The X-ray imaging apparatus includes an X-ray tube 11 that irradiates X-rays, an X-ray detector 12 that detects X-rays that have been irradiated from the X-ray tube 11 and passed through a subject lying on an examination table 18, A C-type arm 14 that supports the X-ray tube 11 and the X-ray detector 12, a support unit 15 that supports the C-type arm 14 so as to be slidable, a turning unit 16 that rotates the support unit 15, A support unit 17 that supports the swivel unit 16 in a standing state with respect to the floor surface, and an operation unit 19 that is movably mounted on the examination table 18 as will be described later.

  An arcuate guide portion 13 is formed on the C-type arm 14, and the support portion 15 supports the C-type arm 14 slidably by engaging with the guide portion 13. The C-arm 14 is configured so that the X-ray tube 11 and the X-ray detector 12 have an X-ray axis extending from the focal point of the X-ray tube 11 to the X-ray detector 12. Supports in a state that matches. The swivel unit 16 swivels the support unit 15 around the axis orthogonal to the X-ray axis extending from the focal point of the X-ray tube 11 to the X-ray detector 12 together with the C-shaped arm 14 and the like.

  In the X-ray imaging apparatus having such a configuration, it is possible to perform imaging on an examinee from an arbitrary direction by sliding and turning the C-arm 14. An X-ray image based on the X-rays that have passed through the subject and detected by the X-ray detector 12 is displayed on the display unit 53 described later.

  FIG. 2 is a plan view of the examination table 18.

  A rail 42 is provided in the longitudinal direction of the examination table 18. The operation unit 19 is slidably mounted along the rail 42. The examination table 18 is provided with a switch 41 as a position detection mechanism for detecting the position of the operation unit 19 with respect to the rail 42.

  FIG. 3 is a perspective view of the operation unit 19.

  The operation unit 19 includes an operation lever 31 that can be operated in four directions, up and down, left and right, and a first operation panel 32 and a second operation panel 33. The operation lever 31 includes buttons 35 and 37 for sliding and turning the C-type arm 14, a button 34 for horizontally moving the C-type arm 14, and a button 36 for raising and lowering the X-ray detector 12. ing.

  FIG. 4 is a block diagram showing a control system of the X-ray imaging apparatus according to the present invention.

  The X-ray imaging apparatus includes a CPU that executes logical operations, a ROM that stores an operation program necessary for controlling the apparatus, and a RAM that temporarily stores data during control, and controls the entire apparatus. 50. The control unit 50 is connected to the X-ray tube 11, the X-ray detector 12, the operation unit 19, and the switch 41 described above. The control unit 50 is connected to a display unit 53 for displaying an X-ray image. Further, the control unit 50 is connected to a moving mechanism 54 having a motor or the like for moving the C-arm 14 by sliding and turning.

  The control unit 50 is a movement amount regulating unit that regulates the movement amount of the C-arm 14 by the moving mechanism 54 in order to prevent interference between the X-ray tube 11 or the X-ray detector 12 and the examination table 18 or the operation unit 19. 51 and a movement amount correction unit 52 that corrects the movement amount of the C-arm 14 regulated by the movement amount regulation unit 51 based on the mounting position of the operation unit 19 detected by the switch 41. The movement amount regulating unit 51 has the same configuration as that described in Patent Document 1 described above.

  FIG. 5 is an explanatory diagram showing a regulating operation for regulating the movement amount of the C-arm 14 in the X-ray imaging apparatus according to the present invention.

  The movement amount restriction unit 51 in the control unit 50 shown in FIG. 4 is configured to prevent the interference between the X-ray tube 11 or the X-ray detector 12 and the examination table 18 or the operation unit 19. It regulates after calculating the amount of movement. Therefore, as shown in FIG. 5A, when the operation unit 19 is disposed at a position close to the C-type arm 14, the slide amount of the C-type arm 14 is equal to that of the X-ray tube 11 and the operation unit. 19 is regulated at a position immediately before the interference. Thereby, interference with the X-ray tube 11 and the operation part 19 is prevented.

  On the other hand, as shown in FIG. 5A, in the case where the operation unit 19 is disposed at a position separated from the C-type arm 14, the C-type arm 14 is further moved from the position shown in FIG. The X-ray tube 11 can slide to a position close to the examination table 18.

  For this reason, in the X-ray imaging apparatus according to the present invention, when the switch 41 detects the operation unit 19 and detects that the operation unit 19 is disposed at a position separated from the C-arm 14, The amount correction unit 52 corrects the restriction value of the movement amount of the C-arm 14 calculated by the movement amount restriction unit 51. Thereby, as shown in FIG.5 (b), the C-type arm 14 moves to the position which adjoins to the examination table 18 further. Accordingly, the C-arm 14 can be moved to a position where the interference between the X-ray tube 11 and the examination table 18 occurs based on the position of the operation unit 19.

  In the description of the operation shown in FIG. 5, the case where the slide amount of the C-type arm 14 is regulated in order to prevent the interference between the X-ray tube 11 and the operation unit 19 has been described. In order to prevent interference between the X-ray tube 11 or the X-ray detector 12 and the operation unit 19, other movement amounts of the slide arm are similarly corrected based on the position of the operation unit 19.

  Next, another embodiment of the present invention will be described. It is a schematic diagram which shows other embodiment of the X-ray imaging apparatus which concerns on this invention. In addition, about the member similar to the X-ray imaging apparatus shown in FIG. 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  This X-ray imaging apparatus includes an examination table with a pair of imaging units of an inner imaging unit having a C-shaped arm 14 and an outer imaging unit having a second C-shaped arm 24, as in the first embodiment. Biplane imaging or the like can be performed on subjects 18.

  An inner imaging unit in the X-ray fluoroscopic imaging apparatus according to the second embodiment includes a C-type arm 14 including an X-ray tube 11 and an X-ray detector 12 similar to those in the first embodiment. The outer imaging unit includes an X-ray tube 21, an X-ray detector 22 that detects X-rays irradiated from the X-ray tube 21 and passing through a subject lying on the examination table 18, and an arcuate guide. A substantially C-shaped second C-shaped arm 24 having a portion 23 and supporting the X-ray tube 21 and the X-ray detector 22, and the arc-shaped guide portion 23 in the second C-shaped arm 24. The second C-type arm 24 is slidably supported by joining together, and a base 27 is provided on the ceiling for moving the second C-type arm 24 horizontally with respect to the subject.

  Also in such a biplane type X-ray imaging apparatus, the movement amount correction unit 52 causes the movement amount regulation unit 51 to perform the operation based on the mounting position of the operation unit 19 on the examination table 18 detected by the position detection mechanism such as the switch 41. By correcting the movement amounts of the C-type arm 14 and the C-type arm 24 that are regulated, the C-type arms 14 and 24 are connected to the X-ray tubes 11 and 21 or the X-ray detector 12 according to the position of the operation unit 19. It is possible to move to the position where the interference between the examination table 22 and the examination table 18 or the operation unit 19 occurs.

  In the above-described embodiment, a single switch 41 provided on the examination table 18 is used as a position detection mechanism for detecting the position of the operation unit 19 with respect to the rail 42. However, a plurality of these switches may be provided, and the movement amounts of the C-arms 14 and 24 may be regulated in accordance with the finer arrangement of the operation unit 19. Further, instead of using the switch 41, the position of the operation unit 19 may be detected using a photo sensor, an encoder, or a potentiometer.

DESCRIPTION OF SYMBOLS 11 X-ray tube 12 X-ray detector 14 C-type arm 18 Examination table 19 Operation part 21 X-ray tube 22 X-ray detector 24 C-type arm 41 Switch 42 Rail 50 Control part 51 Movement amount regulation part 52 Movement amount correction part 54 Movement mechanism

Claims (2)

An examination table on which the subject is placed;
An operation unit movably mounted on the examination table;
An arm that supports the X-ray tube and the X-ray detector facing each other;
A moving mechanism for moving the arm;
In order to prevent interference between the X-ray tube or the X-ray detector and the examination table or the operation unit, a movement amount regulating unit that regulates a movement amount of the arm by the movement mechanism;
In an X-ray imaging apparatus comprising:
A position detection mechanism for detecting a mounting position of the operation unit with respect to the examination table;
A movement amount correction unit that corrects the movement amount of the arm regulated by the movement amount regulation unit based on the mounting position of the operation unit detected by the position detection mechanism;
An X-ray imaging apparatus comprising: The X-ray imaging apparatus according to claim 1,
The operation unit is slidably attached to a rail attached to the examination table,
The X-ray imaging apparatus, wherein the position detection mechanism is a switch that detects a position of the operation unit with respect to the rail.

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