WO1990005485A1 - X-ray apparatus - Google Patents

X-ray apparatus Download PDF

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Publication number
WO1990005485A1
WO1990005485A1 PCT/DK1989/000273 DK8900273W WO9005485A1 WO 1990005485 A1 WO1990005485 A1 WO 1990005485A1 DK 8900273 W DK8900273 W DK 8900273W WO 9005485 A1 WO9005485 A1 WO 9005485A1
Authority
WO
WIPO (PCT)
Prior art keywords
arm
tube
ray
tube arm
holder
Prior art date
Application number
PCT/DK1989/000273
Other languages
French (fr)
Inventor
Aksel Hjorth Jensen
Original Assignee
Nrt-Nordisk Roentgen Teknik A/S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nrt-Nordisk Roentgen Teknik A/S filed Critical Nrt-Nordisk Roentgen Teknik A/S
Priority to DE1990900081 priority Critical patent/DE446259T1/en
Publication of WO1990005485A1 publication Critical patent/WO1990005485A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/502—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for diagnosis of breast, i.e. mammography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/10—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges for stereotaxic surgery, e.g. frame-based stereotaxis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/10—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges for stereotaxic surgery, e.g. frame-based stereotaxis
    • A61B90/14—Fixators for body parts, e.g. skull clamps; Constructional details of fixators, e.g. pins
    • A61B90/17—Fixators for body parts, e.g. skull clamps; Constructional details of fixators, e.g. pins for soft tissue, e.g. breast-holding devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments

Definitions

  • the present invention relates to an x-ray apparatus, preferably for mammography and biopsy, of the kind which comprises:
  • stereotactic instrument which comprises a localization and biopsy needle holder device.
  • X-ray apparatus of this kind for mammographic and biopsic examinations are known. Such apparatus may also be used for preoperative localiza ⁇ tion of catheters and the like.
  • the stereotactic instruments of the known apparatus are typically ac ⁇ cessory instruments which are connected to the x-ray apparatus proper whenever needed.
  • the support plates, the compression bowls and the film cassette holders of such apparatus are usually mounted so as to be mutually displaceable along a guide which is connected to a part of the tube arm running perpendicularly to the rotation shaft.
  • these elements are non-rotatably secured on the tube arm and hence they rota- te jointly with same.
  • the stereotactic instrument is assembled by means of relatively complex fitting means which extends past the tube arm and is non-movably secured in relation to the base frame of the x-ray apparatus.
  • the stereotactic instrument should comprise a support plate, a compression bowl and a film cassette holder in addition to the locali ⁇ zation and biopsy needle holder device, so as to permit angulation of the tube in relation to said elements by calculation of the coordi ⁇ nates to the specific puncture site on the part of the body under exa- mination.
  • the localization and biopsy needle holder device coacts with a display device and a measurement and calculation device. The person to be examined may re- tain the part of her body which is subject to examination in a fixed position irrespective of the rotation of the tube arm during the expo ⁇ sure from various angles.
  • an x-ray ap ⁇ paratus of the kind described above which is characterized in that the apparatus comprises a second arm which is rotatably secured in rela ⁇ tion to the base frame and the tube arm and which is provided with a guide supporting the support plate, the compression bowl and the film cassette holder and that the localization and biopsy needle holder device of the stereotactic instruments combines with a compression bowl to form a combined unit which is constructed so as to be secured in the compression bowl holder of the x-ray apparatus.
  • the x-ray apparatus is suitable for taking images of any part of the body without the person or the part of her body under exa ⁇ mination changing position.
  • the tube arm and the second arm may furthermore be rotated jointly in use, i.e. they have fixed mutual angle setting, wherein the ray is typically perpendicular to the support plate, the compression bowl and the film cassette holder.
  • the apparatus affords the use one support plate and one film cassette only.
  • the apparatus may be produced in an even more simpli ⁇ fied form as compared to the known apparatus, since the localization and biopsy needle holder device is combined with a compression bowl to form a combined unit constructed to be secured in the compression bowl holder of the x-ray apparatus.
  • the combined unit ma thus be mounted in the apparatus solely by dismantling the standard compression bowl and subsequently replacing the standard bowl with the combined unit.
  • the display unit and the measurement and calculation device employed in the known apparatus may be employed in connection with an x-ray apparatus according to the present invention since the only adjustment needed is a minor adjustment of the software used in the measurement and calculation device.
  • the apparatus according to the invention affords a higher degree of puncture accuracy since the localization and biopsy needle holder device may be placed in the immediate vicinity of the compres ⁇ sion bowl and hence in the immediate vicinity of the part of the body which is to be biopsied.
  • the inaccuracies which may occur in the guide, the bearings etc. influence the positioning of the needle tip less as it is now rendered possible to employ shorter needles.
  • the simplified assembly in the compression bowl holder of the x-ray apparatus is more simple and more accurate than the known as- sembly with a fitting means which is both complex and large in order for it to extend past the tube arm and become accurately secured on the base frame of the x-ray apparatus.
  • Figure 1 shows an x-ray apparatus according to the present inven ⁇ tion on which the stereotactic instrument is mounted
  • Figure 2 is a magnified view of a combined unit comprising a localization and biopsy needle holder device and a compr sion bowl according to the invention
  • Figure 3 is a diagrammatical illustration of the taking of images with the x-ray apparatus set in two pre-determined angle positions.
  • Figure 1 shows the x-ray apparatus according to the invention. The apparatus is intended for mammography and biopsy examinations.
  • the mammography apparatus comprises a tube arm 1 supporting an x-ray tube 2 and a Collimator 3 from which a ray extends substantially per- pendicularly to the rotation axis of the tube arm which will be sub ⁇ ject to further discussion below.
  • the tube arm 1 is rotatably secured in relation to a base frame 4 and a shaft 7, the tube arm 1 being pro ⁇ vided with a bearing housing 5 which may rotate about the shaft 7 via two bearings 6.
  • the shaft 7 is supported by two bearings 8 which are positioned in a bearing housing 9 secured to the base frame 4 by bolts 10.
  • the shaft 7 may rotate in the bearing housing 9 in relation to the base frame 4 when a brake 11 secured to the one end of the shaft is released.
  • the tube arm 1 provided with a counter weight 12 to balance the weight of the x-ray tube 2 and the Collimator 3 is rotated manual- ly in a conventional manner when the brake 11 has been released.
  • the tube arm 1 may be rotated to occupy pre-determined angle positions in relation to the shaft 7.
  • a teethed section 13 is secured to the shaft 7.
  • a teethed wheel 14 is connected to the output shaft 15 from a motor 16 built into the tube arm 1.
  • the teethed wheel is in mesh with the teethed section 13 and when the motor is activated the tube arm may swing from the one desired angle position to the other.
  • stoppers are provided which define set angle positions for the tube arm 1. Friction-type engagement means provide an alternative to tooth meshing means.
  • a second arm 17 is provided which is non-ro- tatably secured to the shaft 7.
  • the second arm 17 is provided with a guide 18 mounted perpendicularly to the rotation axis 7' of the shaft 7.
  • a cassette holder 19, a support plate 20 and a compression holder 21 are mounted on the guide 18 and thus the three elements are mutual ⁇ ly displaceable along the line of the ray, schematically indicated by 22, of the x-ray tube 2.
  • the cassette holder 19 supports a cassette 23 for an x-ray film and may have a built-in ion chamber for exposure control.
  • the cassette holder 19 may be displaced along the guide 18 and thus it permits the setting of the desired distance between the film and the focal point of the x-ray tube.
  • the support plate may also be displaced along the guide in order to permit the use of a magnification technique.
  • the compression holder 21 may also travel upwardly and downwardly along the guide 18, e.g. driven by a pneumatic motor or cylinder (not shown).
  • a compression bowl 25 may be located in the compression holder 21 via an arm 24, which bowl is intended for imparting a desired compression to a breast 26 during mammography.
  • the compression bowl 25 in Figure 1 is of the kind which is combined with the localization and biopsy needle holder device 27 of a stereo ⁇ tactic instrument in order to constitute a combined unit 28 construc ⁇ ted so as to be secured in the compression holder 21 of the mammography apparatus when the apparatus is to be used for biopsy.
  • the com ⁇ bined unit 28 replaces the standard compression bowl (not shown) used in mammography.
  • the tube arm 1 For stereotactic exposures it is possible to set the tube arm 1 in two pre-determined angle positions in relation to the second arm 17.
  • the pre-determined angle positions may be set by means of the above stop- pers and thus the tube arm may be set at e.g. 15° to the right of the second arm 17 and at 15° to the left of the second arm 17, respective ⁇ ly, as seen from the front of the apparatus. It goes without saying that other mutual angle settings may be used.
  • the mutual angle is established by activation of the motor 16 located in the tube arm 1 so as to move the tube arm 1 from its starting posi ⁇ tion parallel with the second arm 17 to a position where the tube arm and the x-ray tube 2 are set at e.g 15° to the right whereupon exposu ⁇ re is carried out. Then the motor 16 moves the tube arm and the x-ray tube to the other angle position in relation to the second arm 17 and a second exposure is carried out.
  • the film When the film is developped it may be inserted into a measurement and calculation device (not shown) in order to measure and calculate the coordinates for a puncture site.
  • the x, y and z coordinates may be determi ⁇ ned for correct positioning of a needle for retrieval of a tissue sample.
  • the coordinates may be read off on a display (not shown) con ⁇ nected to the localization and biopsy needle holder device 27 by cables.
  • FIG. 2 is a more detailed view of the combined unit 28 consisting of the compression bowl 25 which is mounted in the compression holder 21 of the mammography apparatus via an arm 24.
  • the assembly is effected by a bayonet socket so as to afford ready exchange of the unit 28 for a standard compression bowl.
  • the compression bowl shown is provided with a window 30 to be used during the biopsy; a needle (not shown) located in the needle guide of a needle holder 31 passes through said window 30.
  • the construction shown permits positioning of the needle guide 32 in the immediate vicinity of the bottom 33 of the compression bowl 25, thus reducing the interference of play, if any, in bearings, guide etc., with the positioning of the needle tip.
  • the needle guide preferably comprises arms 32' which are separated from each other and which each has a collar for controlling the needle.
  • the local zation device 34 is constituted by three microme- tric screws: 35 for determination of an x-position, 36 for determina ⁇ tion of a y-position, and 37 for determination of a z-position for the needle tip.
  • the micrometric screws may the set in manners known per se to a particular puncture site.
  • the bottom of the compression bowl 25 is provided with a marker wire 38, preferably a cupper wire, which is seen as shadows 38A and 38, respectively, on the film in the film plane 23' during exposure.
  • a marker wire 38 preferably a cupper wire
  • Such shadows are used in the well known measure- ment and calculation unit for the calculation of the coordinates of a specific puncture site 39 in the breast 26 under examination.
  • the site 39 is also seen as two shadows 39A and 39B, respectively, on the film when the x-ray tube carries out exposure from positions A and B, re ⁇ spectively. From position A an exposure 40 is achieved and from posi- tion B an exposure 41 is achieved.
  • the use of the well known measurement and calculation unit permits calculation of the x, y and z coordinates for the puncture site 39.
  • the micrometric screws 35, 36 and 37 of the positioning device and the readout of the display permit positioning of the needle tip exact ⁇ ly in the site 39 for the retrieval of a tissue sample.
  • Figure 3 illustrates the determination/calculation of the x, y and z coordinates without, however, giving specific instructions as to the procedure involved, the calculation being known per se.

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Abstract

An X-ray apparatus is provided which is preferably intended for mammography and biopsy and it comprises a tube arm (1) which is rotatably secured in relation to a base frame (4) and which supports the X-ray tube (2). Moreover, the apparatus comprises a support plate (20), a compression bowl (25) and a film cassette holder (19) which are mounted so as to be mutually displaceable. In order to produce such an X-ray apparatus with a simple stereotactic instrument, which is readily mounted on the X-ray apparatus and which eliminates the need for the costly duplicate support plate and film cassette holder, the localization and needle holder device of the stereotactic instrument are combined to form a combined unit which may be secured in the compression bowl holder (21) of the X-ray apparatus. The compression bowl holder (21) and the support plate and the film cassette holder are mounted so as to be displaceable along a guide (18) on the second arm (17). The second arm (17) and the tube arm (1) being settable in various mutual angle settings it is possible to carry out stereotactic exposures and subsequently a biopsy.

Description

X-RAY APPARATUS. Background of the invention.
The present invention relates to an x-ray apparatus, preferably for mammography and biopsy, of the kind which comprises:
- a tube arm which is rotatably secured in relation to a base frame and which supports the x-ray tube,
- a support plate, a compression bowl and a film cassette holder which are mounted so as to be mutually displaceable along the ray line of the tube,
- a stereotactic instrument which comprises a localization and biopsy needle holder device.
X-ray apparatus of this kind for mammographic and biopsic examinations are known. Such apparatus may also be used for preoperative localiza¬ tion of catheters and the like.
The stereotactic instruments of the known apparatus are typically ac¬ cessory instruments which are connected to the x-ray apparatus proper whenever needed. The support plates, the compression bowls and the film cassette holders of such apparatus are usually mounted so as to be mutually displaceable along a guide which is connected to a part of the tube arm running perpendicularly to the rotation shaft. Thus, these elements are non-rotatably secured on the tube arm and hence they rota- te jointly with same. In use, the stereotactic instrument is assembled by means of relatively complex fitting means which extends past the tube arm and is non-movably secured in relation to the base frame of the x-ray apparatus. In order to prevent the person to be x-rayed from rotating with the tube arm during the taking of x-rays from varying angles, the stereotactic instrument should comprise a support plate, a compression bowl and a film cassette holder in addition to the locali¬ zation and biopsy needle holder device, so as to permit angulation of the tube in relation to said elements by calculation of the coordi¬ nates to the specific puncture site on the part of the body under exa- mination. Thus, in the known apparatus an extra set of elements iden¬ tical with said three elements is required. Moreover, the localization and biopsy needle holder device coacts with a display device and a measurement and calculation device. The person to be examined may re- tain the part of her body which is subject to examination in a fixed position irrespective of the rotation of the tube arm during the expo¬ sure from various angles.
It is the object of the present invention to remedy the above draw¬ backs associated with the known x-ray apparatus and to provide a more simple stereotactic instrument which is readily mounted on the x-ray apparatus and which also el minates the need for the costly duplicate elements having functions already provided for in the instrument.
According to the present invention this is achieved with an x-ray ap¬ paratus of the kind described above which is characterized in that the apparatus comprises a second arm which is rotatably secured in rela¬ tion to the base frame and the tube arm and which is provided with a guide supporting the support plate, the compression bowl and the film cassette holder and that the localization and biopsy needle holder device of the stereotactic instruments combines with a compression bowl to form a combined unit which is constructed so as to be secured in the compression bowl holder of the x-ray apparatus.
The support plate, the compression bowl and the film cassette holder being positioned on a guide which is mounted on the second arm and the second arm being mounted rotatably in relation to the tube arm, per¬ mits fixation of the second arm and the elements connected thereto when the tube arm is rotated in order to take images from different angles. Thus, the x-ray apparatus is suitable for taking images of any part of the body without the person or the part of her body under exa¬ mination changing position.
If desired, the tube arm and the second arm may furthermore be rotated jointly in use, i.e. they have fixed mutual angle setting, wherein the ray is typically perpendicular to the support plate, the compression bowl and the film cassette holder.
Thus, the apparatus affords the use one support plate and one film cassette only. The apparatus may be produced in an even more simpli¬ fied form as compared to the known apparatus, since the localization and biopsy needle holder device is combined with a compression bowl to form a combined unit constructed to be secured in the compression bowl holder of the x-ray apparatus. The combined unit ma thus be mounted in the apparatus solely by dismantling the standard compression bowl and subsequently replacing the standard bowl with the combined unit. The display unit and the measurement and calculation device employed in the known apparatus may be employed in connection with an x-ray apparatus according to the present invention since the only adjustment needed is a minor adjustment of the software used in the measurement and calculation device.
Additionally, the apparatus according to the invention affords a higher degree of puncture accuracy since the localization and biopsy needle holder device may be placed in the immediate vicinity of the compres¬ sion bowl and hence in the immediate vicinity of the part of the body which is to be biopsied. Thus, the inaccuracies which may occur in the guide, the bearings etc., influence the positioning of the needle tip less as it is now rendered possible to employ shorter needles. More¬ over, the simplified assembly in the compression bowl holder of the x-ray apparatus is more simple and more accurate than the known as- sembly with a fitting means which is both complex and large in order for it to extend past the tube arm and become accurately secured on the base frame of the x-ray apparatus.
Description of the Drawings. The invention will now be described more in detail with reference to the accompanying drawing, wherein:
Figure 1 shows an x-ray apparatus according to the present inven¬ tion on which the stereotactic instrument is mounted,
Figure 2 is a magnified view of a combined unit comprising a localization and biopsy needle holder device and a compr sion bowl according to the invention, and
Figure 3 is a diagrammatical illustration of the taking of images with the x-ray apparatus set in two pre-determined angle positions. Figure 1 shows the x-ray apparatus according to the invention. The apparatus is intended for mammography and biopsy examinations.
In the following the invention will be explained in terms of use for mammography, but it is obvious that the principle of the invention may also be applied in other kinds of x-ray apparatus.
The mammography apparatus comprises a tube arm 1 supporting an x-ray tube 2 and a Collimator 3 from which a ray extends substantially per- pendicularly to the rotation axis of the tube arm which will be sub¬ ject to further discussion below. The tube arm 1 is rotatably secured in relation to a base frame 4 and a shaft 7, the tube arm 1 being pro¬ vided with a bearing housing 5 which may rotate about the shaft 7 via two bearings 6. The shaft 7 is supported by two bearings 8 which are positioned in a bearing housing 9 secured to the base frame 4 by bolts 10. The shaft 7 may rotate in the bearing housing 9 in relation to the base frame 4 when a brake 11 secured to the one end of the shaft is released. The tube arm 1 provided with a counter weight 12 to balance the weight of the x-ray tube 2 and the Collimator 3 is rotated manual- ly in a conventional manner when the brake 11 has been released.
Moreover, the tube arm 1 may be rotated to occupy pre-determined angle positions in relation to the shaft 7. A teethed section 13 is secured to the shaft 7. A teethed wheel 14 is connected to the output shaft 15 from a motor 16 built into the tube arm 1. The teethed wheel is in mesh with the teethed section 13 and when the motor is activated the tube arm may swing from the one desired angle position to the other. Preferably, stoppers (not shown) are provided which define set angle positions for the tube arm 1. Friction-type engagement means provide an alternative to tooth meshing means.
At the end of the shaft 7 a second arm 17 is provided which is non-ro- tatably secured to the shaft 7. The second arm 17 is provided with a guide 18 mounted perpendicularly to the rotation axis 7' of the shaft 7. A cassette holder 19, a support plate 20 and a compression holder 21 are mounted on the guide 18 and thus the three elements are mutual¬ ly displaceable along the line of the ray, schematically indicated by 22, of the x-ray tube 2. The cassette holder 19 supports a cassette 23 for an x-ray film and may have a built-in ion chamber for exposure control. The cassette holder 19 may be displaced along the guide 18 and thus it permits the setting of the desired distance between the film and the focal point of the x-ray tube.
The support plate may also be displaced along the guide in order to permit the use of a magnification technique. The compression holder 21 may also travel upwardly and downwardly along the guide 18, e.g. driven by a pneumatic motor or cylinder (not shown). A compression bowl 25 may be located in the compression holder 21 via an arm 24, which bowl is intended for imparting a desired compression to a breast 26 during mammography.
The compression bowl 25 in Figure 1 is of the kind which is combined with the localization and biopsy needle holder device 27 of a stereo¬ tactic instrument in order to constitute a combined unit 28 construc¬ ted so as to be secured in the compression holder 21 of the mammography apparatus when the apparatus is to be used for biopsy. Thus, the com¬ bined unit 28 replaces the standard compression bowl (not shown) used in mammography.
For stereotactic exposures it is possible to set the tube arm 1 in two pre-determined angle positions in relation to the second arm 17. The pre-determined angle positions may be set by means of the above stop- pers and thus the tube arm may be set at e.g. 15° to the right of the second arm 17 and at 15° to the left of the second arm 17, respective¬ ly, as seen from the front of the apparatus. It goes without saying that other mutual angle settings may be used.
The mutual angle is established by activation of the motor 16 located in the tube arm 1 so as to move the tube arm 1 from its starting posi¬ tion parallel with the second arm 17 to a position where the tube arm and the x-ray tube 2 are set at e.g 15° to the right whereupon exposu¬ re is carried out. Then the motor 16 moves the tube arm and the x-ray tube to the other angle position in relation to the second arm 17 and a second exposure is carried out. When the film is developped it may be inserted into a measurement and calculation device (not shown) in order to measure and calculate the coordinates for a puncture site. If biopsy is to be carried out the x, y and z coordinates may be determi¬ ned for correct positioning of a needle for retrieval of a tissue sample. The coordinates may be read off on a display (not shown) con¬ nected to the localization and biopsy needle holder device 27 by cables.
Figure 2 is a more detailed view of the combined unit 28 consisting of the compression bowl 25 which is mounted in the compression holder 21 of the mammography apparatus via an arm 24. The assembly is effected by a bayonet socket so as to afford ready exchange of the unit 28 for a standard compression bowl. The compression bowl shown is provided with a window 30 to be used during the biopsy; a needle (not shown) located in the needle guide of a needle holder 31 passes through said window 30. The construction shown permits positioning of the needle guide 32 in the immediate vicinity of the bottom 33 of the compression bowl 25, thus reducing the interference of play, if any, in bearings, guide etc., with the positioning of the needle tip. As shown, the needle guide preferably comprises arms 32' which are separated from each other and which each has a collar for controlling the needle. In principle, the local zation device 34 is constituted by three microme- tric screws: 35 for determination of an x-position, 36 for determina¬ tion of a y-position, and 37 for determination of a z-position for the needle tip. The micrometric screws may the set in manners known per se to a particular puncture site.
As will appear from Figure 3 the bottom of the compression bowl 25 is provided with a marker wire 38, preferably a cupper wire, which is seen as shadows 38A and 38, respectively, on the film in the film plane 23' during exposure. Such shadows are used in the well known measure- ment and calculation unit for the calculation of the coordinates of a specific puncture site 39 in the breast 26 under examination. The site 39 is also seen as two shadows 39A and 39B, respectively, on the film when the x-ray tube carries out exposure from positions A and B, re¬ spectively. From position A an exposure 40 is achieved and from posi- tion B an exposure 41 is achieved.
The use of the well known measurement and calculation unit permits calculation of the x, y and z coordinates for the puncture site 39. Now the micrometric screws 35, 36 and 37 of the positioning device and the readout of the display permit positioning of the needle tip exact¬ ly in the site 39 for the retrieval of a tissue sample.
Figure 3 illustrates the determination/calculation of the x, y and z coordinates without, however, giving specific instructions as to the procedure involved, the calculation being known per se.

Claims

C 1 a i m s
1. An x-ray apparatus, preferably for mammography and biopsy, of the kind which comprises: - a tube arm which is rotatably secured in relation to a base frame and which supports the x-ray tube,
- a support plate, a compression bowl and a film cassette holder which are mounted so as to be mutually displaceable along the ray line of the tube, - a stereotactic instrument which comprises a localization and biopsy needle holder device, c h a r a c t e r i z e d in that the apparatus comprises a second arm which is rotatably secured in relation to the base frame and the tube arm and which is provided with a guide sup¬ porting the support plate, the compression bowl and the film cassette holder and that the localization and biopsy needle holder device of the stereotactic instruments combines with a compression bowl to form a combined unit which is constructed so as to be secured in the com¬ pression bowl holder of the x-ray apparatus.
2. An apparatus according to claim 1, c h a r a c t e r i z e d in that the tube arm is secured rotatably about a shaft which passes through the tube arm and which supports the second arm and is con¬ structed so as to permit displacement in the vertical direction in relation to the base frame.
3. An apparatus according to claim 2, c h a r a c t e r i z e d in that the shaft or the tube arm is provided with a teethed section in¬ tended for mesh with a teethed wheel which is connected to the tube arm and the shaft, respectively, in order to rotate the tube arm be- tween two pre-determined angle positions in relation to the second arm.
4. An apparatus according to claim 3, c h a r a c t e r i z e d in that it comprises settable stoppers for setting the two pre-determined angle positions.
5. An apparatus according to claim 1, c h a r a c t e r i z e d in that the needle guide of the needle holder is located in the immediate vicinity of the bottom of the compression bowl in the combination men¬ tioned so as to allow for the use of shorter needles.
6. An apparatus according to claim 5, c h a r a c t e r i z e d in 5 that the needle guide comprises two arms which are separated from each other and which each comprises a sterile collar for controlling the needle.
7. An apparatus according to claim 1, c h a r a c t e r i z e d in iθ that a marker wire is placed at the bottom of the compression bowl, which marker wire is seen as a shadow which is used by the measurement and calculation unit when calculating the coordinates of a specific site in the part of the body under examination.
15 8. An apparatus according to claim 1, c h a r a c t e r i z e d in that the combined unit is contructed so as to coact with the support plate and the film cassette holder of the x-ray apparatus.
9. An apparatus according to claim 3, c h a r a c t e r i z e d in 0 that the teethed wheel is connected to the tube arm and that it is mounted on the shaft of a motor which is non-rotatably connected to the tube arm and that it is contructed so as to rotate between the desired angle positions.
5
0
5
PCT/DK1989/000273 1988-11-23 1989-11-17 X-ray apparatus WO1990005485A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1990900081 DE446259T1 (en) 1988-11-23 1989-11-17 X-RAY ARRANGEMENT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK6544/88 1988-11-23
DK654488A DK654488A (en) 1988-11-23 1988-11-23 ROENTGENAPPARAT

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FR2666217A1 (en) * 1990-08-28 1992-03-06 Annonier Claude Device for radiostereotaxic targetting and puncturing of suspect lesions of the breast
EP0400168B1 (en) * 1989-05-30 1994-09-14 Siemens Aktiengesellschaft Medical installation to position a therapeutical apparatus
FR2703237A1 (en) * 1993-03-29 1994-10-07 Ge Medical Syst Sa Mammograph equipped with a stereotaxic imaging device with digital detector and method of using such a mammograph
FR2823969A1 (en) * 2001-04-30 2002-10-31 Ge Med Sys Global Tech Co Llc METHOD FOR TAKING TISSUE DURING X-RAY EXAMINATION AND DEVICE FOR IMPLEMENTING SAME
DE10353611A1 (en) * 2003-11-17 2005-06-23 Siemens Ag X-ray diagnostic device for mammography examinations
EP1816965A2 (en) * 2004-11-26 2007-08-15 Hologic, Inc. Integrated multi-mode mammography/tomosynthesis x-ray system and method
WO2007090693A1 (en) * 2006-02-03 2007-08-16 Siemens Aktiengesellschaft Positioning device for a mammography unit
US8873824B2 (en) 2007-09-20 2014-10-28 Hologic, Inc. Breast tomosynthesis with display of highlighted suspected calcifications
US9042612B2 (en) 2002-11-27 2015-05-26 Hologic, Inc. Image handling and display in X-ray mammography and tomosynthesis
US9084579B2 (en) 2004-11-15 2015-07-21 Hologic, Inc. Matching geometry generation and display of mammograms and tomosynthesis
US9095306B2 (en) 2002-11-27 2015-08-04 Hologic, Inc. Image handling and display in X-ray mammography and tomosynthesis
US9119593B2 (en) 2008-08-29 2015-09-01 Hologic, Inc. Multi-mode tomosynthesis/mammography gain calibration and image correction using gain map information from selected projection angles
US9180312B2 (en) 2005-11-18 2015-11-10 Hologic, Inc. Brachytherapy device for asymmetrical irradiation of a body cavity
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US10959694B2 (en) 2002-11-27 2021-03-30 Hologic, Inc. Full field mammography with tissue exposure control, tomosynthesis, and dynamic field of view processing
US11076820B2 (en) 2016-04-22 2021-08-03 Hologic, Inc. Tomosynthesis with shifting focal spot x-ray system using an addressable array
US11090017B2 (en) 2018-09-13 2021-08-17 Hologic, Inc. Generating synthesized projection images for 3D breast tomosynthesis or multi-mode x-ray breast imaging
US11403483B2 (en) 2017-06-20 2022-08-02 Hologic, Inc. Dynamic self-learning medical image method and system
US11406332B2 (en) 2011-03-08 2022-08-09 Hologic, Inc. System and method for dual energy and/or contrast enhanced breast imaging for screening, diagnosis and biopsy
US11419565B2 (en) 2014-02-28 2022-08-23 IIologic, Inc. System and method for generating and displaying tomosynthesis image slabs
US11419569B2 (en) 2017-08-16 2022-08-23 Hologic, Inc. Image quality compliance tool
US11445993B2 (en) 2017-03-30 2022-09-20 Hologic, Inc. System and method for targeted object enhancement to generate synthetic breast tissue images
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US11452486B2 (en) 2006-02-15 2022-09-27 Hologic, Inc. Breast biopsy and needle localization using tomosynthesis systems
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EP0400168B1 (en) * 1989-05-30 1994-09-14 Siemens Aktiengesellschaft Medical installation to position a therapeutical apparatus
FR2666217A1 (en) * 1990-08-28 1992-03-06 Annonier Claude Device for radiostereotaxic targetting and puncturing of suspect lesions of the breast
FR2703237A1 (en) * 1993-03-29 1994-10-07 Ge Medical Syst Sa Mammograph equipped with a stereotaxic imaging device with digital detector and method of using such a mammograph
US5539797A (en) * 1993-03-29 1996-07-23 Ge Medical Systems Sa Method and apparatus for digital stereotaxic mammography
FR2823969A1 (en) * 2001-04-30 2002-10-31 Ge Med Sys Global Tech Co Llc METHOD FOR TAKING TISSUE DURING X-RAY EXAMINATION AND DEVICE FOR IMPLEMENTING SAME
US9851888B2 (en) 2002-11-27 2017-12-26 Hologic, Inc. Image handling and display in X-ray mammography and tomosynthesis
US10959694B2 (en) 2002-11-27 2021-03-30 Hologic, Inc. Full field mammography with tissue exposure control, tomosynthesis, and dynamic field of view processing
US10452252B2 (en) 2002-11-27 2019-10-22 Hologic, Inc. Image handling and display in X-ray mammography and tomosynthesis
US11372534B2 (en) 2002-11-27 2022-06-28 Hologic, Inc. Image handling and display in x-ray mammography and tomosynthesis
US10413263B2 (en) 2002-11-27 2019-09-17 Hologic, Inc. System and method for generating a 2D image from a tomosynthesis data set
US9498175B2 (en) 2002-11-27 2016-11-22 Hologic, Inc. System and method for low dose tomosynthesis
US10719223B2 (en) 2002-11-27 2020-07-21 Hologic, Inc. Image handling and display in X-ray mammography and tomosynthesis
US9460508B2 (en) 2002-11-27 2016-10-04 Hologic, Inc. Image handling and display in X-ray mammography and tomosynthesis
US10296199B2 (en) 2002-11-27 2019-05-21 Hologic, Inc. Image handling and display in X-Ray mammography and tomosynthesis
US9042612B2 (en) 2002-11-27 2015-05-26 Hologic, Inc. Image handling and display in X-ray mammography and tomosynthesis
US10638994B2 (en) 2002-11-27 2020-05-05 Hologic, Inc. X-ray mammography with tomosynthesis
US10108329B2 (en) 2002-11-27 2018-10-23 Hologic, Inc. Image handling and display in x-ray mammography and tomosynthesis
US9095306B2 (en) 2002-11-27 2015-08-04 Hologic, Inc. Image handling and display in X-ray mammography and tomosynthesis
DE10353611A1 (en) * 2003-11-17 2005-06-23 Siemens Ag X-ray diagnostic device for mammography examinations
US6999554B2 (en) 2003-11-17 2006-02-14 Siemens Aktiengesellschaft X-ray diagnostic apparatus for mammography examinations
DE10353611B4 (en) * 2003-11-17 2013-01-17 Siemens Aktiengesellschaft X-ray diagnostic device for mammography examinations
US11096644B2 (en) 2003-11-26 2021-08-24 Hologic, Inc. X-ray mammography with tomosynthesis
US10413255B2 (en) 2003-11-26 2019-09-17 Hologic, Inc. System and method for low dose tomosynthesis
US9623260B2 (en) 2004-11-05 2017-04-18 Theragenics Corporation Expandable brachytherapy device
US10248882B2 (en) 2004-11-15 2019-04-02 Hologic, Inc. Matching geometry generation and display of mammograms and tomosynthesis images
US9084579B2 (en) 2004-11-15 2015-07-21 Hologic, Inc. Matching geometry generation and display of mammograms and tomosynthesis
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US9066706B2 (en) 2004-11-26 2015-06-30 Hologic, Inc. Integrated multi-mode mammography/tomosynthesis x-ray system and method
US11617548B2 (en) 2004-11-26 2023-04-04 Hologic, Inc. Integrated multi-mode mammography/tomosynthesis x-ray system and method
EP1816965A2 (en) * 2004-11-26 2007-08-15 Hologic, Inc. Integrated multi-mode mammography/tomosynthesis x-ray system and method
EP1816965A4 (en) * 2004-11-26 2008-12-31 Hologic Inc Integrated multi-mode mammography/tomosynthesis x-ray system and method
US9549709B2 (en) 2004-11-26 2017-01-24 Hologic, Inc. Integrated multi-mode mammography/tomosynthesis X-ray system and method
US10194875B2 (en) 2004-11-26 2019-02-05 Hologic, Inc. Integrated multi-mode mammography/tomosynthesis X-ray system and method
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US9180312B2 (en) 2005-11-18 2015-11-10 Hologic, Inc. Brachytherapy device for asymmetrical irradiation of a body cavity
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US7885379B2 (en) 2006-02-03 2011-02-08 Siemens Aktiengesellschaft Positioning device for a mammography unit
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US11918389B2 (en) 2006-02-15 2024-03-05 Hologic, Inc. Breast biopsy and needle localization using tomosynthesis systems
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US9119593B2 (en) 2008-08-29 2015-09-01 Hologic, Inc. Multi-mode tomosynthesis/mammography gain calibration and image correction using gain map information from selected projection angles
US9579524B2 (en) 2009-02-11 2017-02-28 Hologic, Inc. Flexible multi-lumen brachytherapy device
US9248311B2 (en) 2009-02-11 2016-02-02 Hologic, Inc. System and method for modifying a flexibility of a brachythereapy catheter
US10207126B2 (en) 2009-05-11 2019-02-19 Cytyc Corporation Lumen visualization and identification system for multi-lumen balloon catheter
US11701199B2 (en) 2009-10-08 2023-07-18 Hologic, Inc. Needle breast biopsy system and method of use
US10022557B2 (en) 2010-09-30 2018-07-17 Hologic, Inc. Using a guided member to facilitate brachytherapy device swap
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US10792003B2 (en) 2010-10-05 2020-10-06 Hologic, Inc. X-ray breast tomosynthesis enhancing spatial resolution including in the thickness direction of a flattened breast
US9808214B2 (en) 2010-10-05 2017-11-07 Hologic, Inc. Upright X-ray breast imaging with a CT mode, multiple tomosynthesis modes, and a mammography mode
US11191502B2 (en) 2010-10-05 2021-12-07 Hologic, Inc. Upright x-ray breast imaging with a CT mode, multiple tomosynthesis modes, and a mammography mode
US11775156B2 (en) 2010-11-26 2023-10-03 Hologic, Inc. User interface for medical image review workstation
US10342992B2 (en) 2011-01-06 2019-07-09 Hologic, Inc. Orienting a brachytherapy applicator
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DK654488A (en) 1990-05-24
EP0446259A1 (en) 1991-09-18
DK654488D0 (en) 1988-11-23

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