Abstract:
A medical imaging device having a tubular receiving region to receive a patient on a patient couch is proposed. The medical imaging device has a wall at least partially enclosing the receiving region. The medical imaging device features a film disposed on the wall at least partially enclosing the receiving region for generating at least one virtual image. The virtual image refers to a visual mapping of a light-reflecting object and/or an illuminated object.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims priority of German application No. 10 2010 039 469.6 filed Aug. 18, 2010, which is incorporated by reference herein in its entirety. 
     FIELD OF THE INVENTION 
     The present invention relates to a medical imaging device having an in particular tubular receiving region to receive a patient on a patient couch, and a wall at least partially enclosing the receiving region. 
     BACKGROUND OF THE INVENTION 
     Medical imaging devices, for example magnetic resonance devices or computed tomography devices, comprise a receiving region, in particular a circular cylinder-shaped and/or tubular receiving region to receive a patient. In conventional medical imaging devices this receiving region has a maximum diameter of approx. 60 cm to 70 cm. The patient lies on a patient couch inside this receiving region for a medical examination and/or for medical imaging. The distance between the face and/or eye region of the patient and a wall of the medical imaging device enclosing the receiving region is therefore maximum 25 cm to 30 cm, which can cause many patients to experience feelings of claustrophobia and/or unease. When the medical imaging device is used to perform a measurement it is however particularly important for the patient to be as relaxed and still as possible on the patient couch inside the receiving region to prevent any negative impact on and/or falsification of a measurement result, for example due to patient movement. 
     A medical imaging device having a receiving region to receive a patient is known from WO 2006/051497 A1. This medical imaging device comprises a flat mirror, which is disposed inside the receiving region parallel to a couch surface of a patient couch. However this mirror must also be configured to be magnetic-resonance-compatible for deployment in a magnetic resonance device, which makes the production of the mirror expensive. Also the mirror takes up a lot of space inside the receiving region and can therefore cause the patient to be impeded and/or at least restricted inside the receiving region. 
     A medical imaging device is also known, wherein a simple colored adhesive strip is disposed inside the receiving region. However because of its proximity to the patient this adhesive strip can cause the patient to feel ill at ease by placing an excessive strain on the eye muscles of the patient. 
     SUMMARY OF THE INVENTION 
     The object of the present invention is in particular to provide a medical imaging device, wherein the patient feels at ease during a medical imaging examination with little outlay. The object is achieved by the features of the independent claim. Advantageous embodiments of the invention are described in the dependent claims. 
     The invention is based on a medical imaging device having an in particular tubular receiving region to receive a patient on a patient couch and a wall at least partially enclosing the receiving region. 
     It is proposed that the medical imaging device should have a film disposed on the wall at least partially enclosing the receiving region, said film generating at least one virtual image. The medical imaging device is advantageously formed by a magnetic resonance device or a computed tomography device. In this context a virtual image refers in particular to a visual mapping of a light-reflecting object and/or an illuminated object, which in contrast to a real image cannot be displayed on a screen. The light-reflecting and/or illuminated object here is disposed between a focal point of at least one lens and the at least one lens. The inventive embodiment allows a depth effect of the receiving region to be suggested to the patient inside the receiving region, in that a greater, virtual distance between the patient on the patient couch and the wall with the film disposed on it than the actual distance between the patient and the wall can be suggested to and/or simulated for said patient. For patients with a tendency to claustrophobic anxiety states in particular this can induce a feeling of well being and/or at least partially suppress any claustrophobic anxiety states as a result of a suggested and/or simulated depth effect of the film. A depth and/or thickness of film suggested to the patient is at least twenty times the structurally required depth and/or thickness of film and particularly advantageously at least thirty times the structurally required depth and/or thickness of film, so that the film produces a three-dimensional impression and/or effect for the patient. The film has a thickness of approx. 0.5 mm to 0.6 mm, the depth effect being up to 20 mm or the virtual image being disposed at a virtual distance of up to 20 mm in particular from the viewpoint of the patient or a viewer behind the surface of the film. This depth effect can be achieved particularly economically inside the receiving region by using a film. The film also allows a patient to concentrate and/or focus his/her eyes and/or attention on the film during a measurement, which can help the patient relax significantly during an imaging measurement, thereby preventing unnecessary and in particular undesirable movement of the patient. 
     It is also proposed that the film should comprise at least two layers, thereby allowing the depth effect or virtual image to be generated in a structurally simple and space-saving manner by means of the film. It is particularly advantageous here for the film to have at least one layer, which comprises a plurality of optical lens elements, thereby allowing a sharp, undistorted image to be generated when the film is viewed from any direction. The layer with the plurality of optical lens elements is preferably formed by a top layer, which is disposed on a side of the film facing the patient. The optical lens elements are preferably formed by convex lens elements, the diameter of the individual convex lens elements being a multiple smaller than the thickness of the film. 
     If the film has at least one layer, which is printed at least partially on the front, it is also possible to generate a virtual background image for the patient to look at. In this context a layer printed on the front means in particular that a surface of the layer facing the receiving region is printed with a motif, in particular a colored motif. The motifs printed on the surface of the layer are preferably disposed from the patient&#39;s viewpoint behind the layer with the optical lens elements and are mapped by these to generate the virtual image. The film preferably comprises a number of layers printed on the front. In an interaction with a top layer made up of a plurality of optical lens elements, virtual images of the different layers, in particular of the layers printed on the front, can be shown in different depth planes, thereby generating a three-dimensional effect for someone looking at the film or the virtual images. The layer with the optical lens elements can also have a printed surface, which however only supplies a two-dimensional image for the patient, which is in particular superimposed on the virtual background image. It is also conceivable for a number of films with different motifs to be available to be positioned inside the receiving region, so that the medical imaging device, in particular the film, can be tailored to an area of application of the medical imaging device. 
     In an advantageous development of the invention it is proposed that the film should be connected at least partially with a material fit to the wall at least partially enclosing the receiving region. It is particularly advantageous for the film to be bonded to the wall, allowing particularly fast and structurally simple fastening and/or attachment of the film to the wall of the medical imaging device to be achieved. The film therefore particularly advantageously assumes a contour of the wall at least partially enclosing the receiving region, so that any restriction of the receiving region can also be prevented. Further material fit connections that appear useful to the person skilled in the art are alternatively or additionally possible between the film and wall. 
     To prevent and/or suppress vigorous eye movement of the patient during an examination using the medical imaging device, the film has a width of maximum 10 cm and particularly advantageously a width of essentially 5 cm. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Further advantages will emerge from the description of the drawings which follows. The drawings show an exemplary embodiment of the invention. The drawings, description and the claims contain numerous features in combination. The person skilled in the art will also expediently consider the features individually and combine them in useful further combinations. In the drawings: 
         FIG. 1  shows an inventive medical imaging device and 
         FIG. 2  shows a film of the medical imaging device with a virtual image. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       FIG. 1  shows a schematic diagram of an inventive medical imaging device  1 , in the present exemplary embodiment formed by a magnetic resonance device  2 . The magnetic resonance device  2  comprises a receiving region  3  to receive a patient  4 . The receiving region  3  is tubular, in particular circular cylinder-shaped, and enclosed by a wall  5  of the magnetic resonance device  2 . The wall  5  of the magnetic resonance device  2  here is formed by a housing shell of the magnetic resonance device  2 . In an alternative embodiment of the invention the medical imaging device  1  can also be formed by a computed tomography device and/or further medical imaging device, which appear useful to the person skilled in the art, having an in particular tubular receiving region  3  to receive the patient  4 . A tubular receiving region  3  can also have a D-shaped cross section. The receiving region  3  can also be configured as C-shaped. 
     For an imaging magnetic resonance examination the patient  4  is positioned on a patient couch  6  and introduced lying on this into the receiving region  3 . With the patient  4  lying on the patient couch  6  in a normal lying position the distance  7  for example between the eye region of the patient  4  and a region  9  of the wall  5  opposite and/or facing the couch surface  8  of the patient couch  6  is approx. 20 cm to 30 cm. A film  10  is disposed on this region  9  of the wall  5 , generating at least one virtual image  11 . The film  10  is connected to the region  9  of the wall  5  with a material fit, being bonded in particular to the region  9  of the wall  5  by means of an adhesive layer  9  of the film  10 . The virtual image  11  allows a depth effect and/or a three-dimensional effect of the film  10  to be suggested to a patient  4  inside the receiving region  3 , in that an actual distance  23  between the eye region of the patient  4  and a surface of the film  10  is smaller than a distance  12  between the eye region of the patient  4  and the at least one virtual image  11 . 
     The film  10  is also disposed on the wall  5  along an essentially entire length of the receiving region  3  or along an essentially entire length of the wall  5  enclosing the receiving region  3 . The film  10  has a width  13 , which is aligned essentially perpendicular to the length of the film  10 . The width  13  of the film  10  is maximum 10 cm and particularly advantageously essentially 5 cm, so that a patient  4  can remain still, in particular without head movements, and relaxed when looking at the film  10  during a magnetic resonance measurement and the effect of the film  10  is to induce relaxation in the patient  4 , thereby preventing major eye movement at least to some degree when looking at the film  10 . To this end the film  10  is disposed on the wall  5  in such a manner that the field of vision of the patient  4  is directed directly onto the film  10  in a preferred position on the patient couch  6 , when the patient  4  is lying on his/her back on the patient couch  6 . 
     In order to generate the virtual image  11  or to generate the depth effect and/or three-dimensional effect, the film  10  has a number of layers  14 ,  15 ,  16 . A top layer  14 , which faces the receiving region  3 , has a plurality of optical lens elements, which are configured in an essentially identical manner. The optical lens elements are formed by convex lens elements and are disposed directly adjacent to one another within the top layer  14 . 
     The film  10  also has a number of layers  15 ,  16 , which feature a printed surface  17 ,  18 . These layers  15 ,  16  are disposed between the top layer  14  and the adhesive layer  19  for bonding to the wall  5 . The printed surfaces  17 ,  18  here are formed by a front printed surface  17 ,  18 , the surfaces  17 ,  18  printed on the front facing away from the adhesive layer  19  and facing the top layer  14  with the plurality of optical lens elements and the receiving region  3 . The individual layers  14 ,  15 ,  16  with the surfaces  17 ,  18  printed on the front are also disposed at different distances from the top layer  14  with the optical lens elements. The distance to the individual layers  15 ,  16  here is less than or equal to a focal length of the convex lens elements, so that virtual images  11  are formed by the mapping of motifs printed on the surfaces  17 ,  18 . Alternatively the film  10  can have further layers that appear useful to the person skilled in the art, as required to generate a depth effect and/or the three-dimensional effect of the film  10 . The layer  14  with the optical lens elements can also have a printed surface, said printed surface appearing to the patient  4  as a two-dimensional image, which is superimposed on the virtual image  11 . 
     The top layer  14  with the optical lens elements and different actual distances between the individual layers  15 ,  16  with the printed surfaces  17 ,  18  and the top layer  14  mean that when a person looks at the film  10 , a depth effect and/or the three-dimensional effect is suggested, in that a virtual image  11  is generated for each of the layers  15 ,  16  with a printed surface  17 ,  18 . These different, virtual images  11  are each at a different distance  22  from the top layer  14  of the film  10 . As an alternative to the present exemplary embodiment the individual layers  15 ,  16  with the printed surfaces  17 ,  18  can be at least two to five intermediate layers from the top layer  14  for example. 
     The film  10  is formed from a polypropylene material, in particular from a recycled polypropylene material, so that after use it can be disposed of in a particularly simple and environmentally friendly manner. It is also possible to produce a film  10  configured in this manner with low production costs and little production outlay. In one alternative embodiment of the film  10  it can also be formed by further materials that appear useful to the person skilled in the art. The film  10  has for example a thickness of approx. 0.5 mm to 0.6 mm and a virtual distance  22  between the virtual images  11  generated by the film  10  and the top layer  14  of up to 20 mm, so that an increase in the distance  7  between the patient  4  and the wall  5  enclosing the receiving region  3  is suggested to and/or simulated for the patient  4 .