Continuous photographing and observing of a three-dimensional image

• US 5,034,987 A
• Filed: 04/25/1989
• Issued: 07/23/1991
• Est. Priority Date: 12/09/1988
• Status: Expired due to Fees

• Current Assignee: Nippon Identograph Company Limited
• Original Assignee: Nippon Identograph Company Limited
• Inventors: Minakami, Shigeru, Fujimoto, Masafumi, Haneda, Takuya
• Primary Examiner(s): Boudreau, Leo H.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US07/343,411
• Time in Patent Office: 819 Days
• Field of Search: 378/99, 358/111, 364/413.14, 364/413.15, 364/413.16, 382/6
• US Class Current: 382/131
• CPC Class Codes: A61B 6/463 characterised by displaying multiple images or images and diagnostic data on one display
• CPC Class Codes: A61B 6/481 involving the use of contrast agents
• CPC Class Codes: A61B 6/504 for diagnosis of blood vessels, e.g. by angiography

Abstract

A target is continuously observed and stereoscopic three-dimensional image information of the target is recorded. A transmitter unit irradiates a target with suitable radiation, an image recording unit records radiation images of the target, a rotating unit incrementally positions the target between the transmitting and image recording units, injecting means places a contrast material into the target, a memory stores a first set of reference images of the target for predetermined number of angular increments prior to injection of said contrast material and stores second set of contrast images for each angular increment of rotation of the target after injection of the contrast material, an arithmetic unit produces a set of drawn or subtractive images of the target from the stored reference and contrast image data, and an indicator unit displays two drawn images of the target that are separated by a certain angular difference so that the two images can be viewed in three dimension using a stereo-scope.

Claims

1. Apparatus for continuously producing steroscopic pairs of images of a target for viewing that includes

means for supporting a target upon a common axis between a transmitter means for irradiating the target and an imaging means for recording two-dimensional radiation images of said target and providing electrical data signals of said recorded images,

stage means for producing relative rotation between the target and the transmitter and imaging means so that images of that target may be recorded at uniform angular increments separated by a predetermined number of degrees,

memory means connected to the imaging means for storing target image data during each angular increment of rotation,

injection means for introducing a contrast material into the target at an interval after the start of rotation,

control means connected to the imaging means and the memory means for causing a target image to be recorded and forwarded to the memory means for storing during each angular increment of rotation before injection of said contrast rotation so that a first set of reference images are stored in the memory means and also after injection of said contrast rotation so that a second set of contrast images are also stored in the memory means,

arithmetic means associated with said memory means for producing a subtractive drawn image from the reference and contrast image data stored in the memory means for each angular increment of rotation and storing said drawn images in said memory means, and

display means connected to the memory means for simultaneously presenting two drawn images for two respective angular increments of rotation of the target for viewing stereoscopically, one to the left eye of an observer and the other to the right eye of the observer, said two drawn images being angularly displaced a predetermined number of degrees so that a stereoscopic picture of the target is presented to the observer.

2. The apparatus of claim 1 wherein said steroscopic display means include a first indicator means for displaying a first drawn image and a second indicator means for displaying a second drawn image, said drawn images being angularly displaced from each other by five to seven degrees of rotation.

3. The apparatus of claim 2 wherein the angle of rotation of each angular increment is equal to the predetermined number of degrees separating the two drawn images displayed by the indicator means.

4. The apparatus of claim 2 wherein said display means further include a selector means for permitting the drawn images to be scanned from said memory means through a desired number of degrees of rotation in either a clockwise or counter-clockwise direction.

5. The apparatus of claim 1 wherein said transmitting means irradiates the target with x-rays.

6. The apparatus of claim 1 wherein the arithmetic means includes means for subtracting contrast image data stored in said memory means from the corresponding reference image data stored in said memory means.

7. The apparatus of claim 1 wherein said control means is included in a computer means for coordinating the operation of the transmitter means, the imaging means, the injecting means, the stage means, the arithmetic means, and the display means.

8. The apparatus of claim 7 wherein said computer means further includes a hard disk or a floppy disk for programming said operations in an ordered sequence.

9. The apparatus of claim 1 wherein said imaging means includes a video camera and further includes means for synchronizing the rotating angle of the stage means with the vertical synchronized signal of the video camera prior to the stage reaching a starting angle at which images of the target are recorded.

10. The apparatus of claim 9 having further means for synchronizing the operation of the transmitter means with the vertical synchronizing signal of said video camera.

11. The apparatus of claim 1 wherein said memory means further includes a first memory zone for storing digital image data relating to the reference images and a second memory zone for storing digital image data relating to the contrast images.

12. The apparatus of claim 2 wherein the display means further includes a stereo-scope connected to said first and second indicator means.

13. The apparatus of claim 4 wherein said display means further includes means for indicating the direction of rotation of the stage means when target images are being displayed.

14. The apparatus of claim 8 wherein the target is a vivos subject and the computer means is programmed to allow the contrast material to flow into the target region before recording said contrast images.

15. The apparatus of claim 1 that includes the further steps of selectively scanning the memory in one direction to produce a clockwise rotation of the picture and in the opposite direction to produce a counter-clockwise rotation of the picture.

16. The apparatus of claim 1 wherein the angular separation between the two displayed drawn images is equal to the angular displacement between increments.

17. The apparatus of claim 1 wherein said display means further includes a reference means for visually indicating a direction of rotation of the target that is being viewed.

18. The apparatus of claim 17 wherein said reference means provide visual indication of the position of the stereoscopic picture relative to the back side and the front side of the target that is being viewed.

19. A method for continuously producing three-dimensional images of a target for viewing that includes the steps of

rotating the target in angular increments in relation to a video camera for recording two-dimensional radiation images of the target and providing digital image signals of said target images

irradiating the target during each angular increment to produce a series of two-dimensional reference images,

storing the reference images in memory,

injecting a contrast material into the target,

repeating the rotating and irradiating steps to produce a second series of two-dimensional contrast images.

storing the contrast images in memory,

performing digital computations on the stored corresponding reference and contrast images to produce an enhanced image of the target for each angular increment of target rotation,

storing the enhanced images in memory, and

simultaneously displaying two of said enhanced images of the target for respective angular increments and which are angularly displaced a desired number of degrees to produce a stereoscopic picture of the target with one image being presented to the left eye of an observer and the other image being presented to the right eye of the observer.

20. The method of claim 19 that further includes scanning the memory to produce rotation of the stereoscopic picture.