fig1 schematically shows a medical imaging apparatus 10 . in the exemplary embodiment , the medical imaging apparatus 10 is formed as a magnetic resonance apparatus 11 . the design of the medical imaging apparatus 10 is not limited to a magnetic resonance apparatus 11 . the medical imaging apparatus 10 can be formed by any medical imaging apparatus that is considered expedient to those skilled in the art , such as a computed tomography apparatus , a positron emission tomography apparatus , etc . the magnetic resonance apparatus 11 has a scanner 13 , formed by a magnetic unit . the scanner 13 has a superconductive basic field magnet 14 for generating a strong and constant basic magnetic field 15 . the magnetic resonance scanner 13 has a patient - receiving region 16 for receiving a patient 17 . in the exemplary embodiment the patient - receiving region 16 is cylindrical and is cylindrically surrounded in the circumferential direction by the scanner 13 . a different design of the patient - receiving region 16 is also conceivable . the patient 17 can be moved by a patient - positioning device 18 of the magnetic resonance device 11 into the patient - receiving region 16 . the patient - positioning device 18 has for this purpose an examination table 19 designed to move within the patient - receiving region 16 . the scanner 13 also has a gradient coil arrangement 20 for generating magnetic field gradients , which are used for spatial encoding during data acquisition . the gradient coil arrangement 20 is controlled by a gradient control processor 21 of the magnetic resonance apparatus . the scanner 13 also has a radio - frequency antenna 22 . the radio - frequency antenna 22 is controlled by a radio - frequency antenna control processor 23 of the magnetic resonance apparatus so as to irradiate radio - frequency pulse sequences into the patient - receiving region 15 of the scanner 13 so as to cause nuclear spins in the patient 17 to deviate from the polarization produced by the basic field 15 . for controlling the basic field magnet 14 , the gradient control processor 21 , and for controlling the radio - frequency antenna control processor 23 , the magnetic resonance apparatus has a system control computer 24 . the system control computer 24 centrally controls the magnetic resonance apparatus , such as to execute a predetermined imaging gradient echo sequence . furthermore , the system control computer 24 has an evaluation processor ( not shown ) for evaluation of medical image data acquired during the magnetic resonance examination . the magnetic resonance apparatus also has a control console 25 connected to the system control computer 24 . control information , such as imaging parameters , and reconstructed magnetic resonance images , can be displayed on a display unit 26 , for example on at least one monitor , of the control console 25 for a user 28 , such as a medical operator . the control console 25 also has an input unit 27 via which information and / or parameters can be entered by the medical operator during a scanning process . the system control computer 24 is situated together with the operating console 25 , gradient control processor 21 and radio - frequency antenna control processor 23 inside a control room 30 . the scanner 13 is situated inside an examination room 29 , with the examination room 29 preferably being shielded outwardly and inwardly in order to shield against disruptive effects that can affect a medical imaging examination and that may be caused by the medical imaging apparatus 10 . in particular , the examination room 29 , in one embodiment of the medical imaging apparatus 10 as a magnetic resonance apparatus , is shielded with respect of magnetic fields and against electromagnetic radiation , in particular radio - frequency radiation . preferably all units and modules for controlling the medical imaging apparatus 10 are arranged in the control room 30 . the control room 20 is designed separately and so as to be shielded from the examination room 29 with respect to an exchange of electromagnetic radiation and / or magnetic fields . for exchange of information between the magnetic resonance apparatus and the user 28 within the examination room 29 and / or for controlling and / or monitoring the magnetic resonance apparatus and / or a magnetic resonance examination , the magnetic resonance apparatus has a user interface 31 that is situated inside the examination room 29 . for detection of input gestures of the user 28 , the user interface 31 has a gesture detector 32 . in the exemplary embodiment , the gesture detector 32 has a camera , by which a position and / or movements of the user 28 can be detected . the position data and / or movement data detected by the gesture detector 32 are transmitted via a data transmission bus ( not shown ) to a gesture evaluation processor 36 of the system control computer 24 and are evaluated therein . the gesture detector 32 is situated inside the examination room 29 ; the gesture evaluation processor 36 is situated inside the control room 30 . the user interface 31 also has a depiction unit 34 formed by a projector which is provided for projection of information and / or data within the examination room 29 . to avoid misinterpretation of individual input gestures of the user 28 , the user interface 31 also has an activation status controller 33 by which detection of input gestures by means of the gesture detector 32 is activated . in the present exemplary embodiment the activation status controller 33 is incorporated by the system control computer 24 and is arranged inside the control room 30 . gesture detection is activated by the gesture detector 32 by the activation status controller 33 . an activation signal for activating detection of at least one input gesture of the user 28 can be detected by the depictor 34 , in particular the projector , in collaboration with the gesture detector 32 , with detection of the activation signal being controlled by the activation status controller 33 . furthermore , the user interface 31 has an additional operating element 35 , which in the exemplary embodiment is formed by a pedal . with this operating element 35 , an activation signal can likewise be entered , with detection of the activation signal by the operating element 35 , in particular the pedal , being controlled by the activation status controller 33 here as well . in an alternative embodiment of the invention , the activation status controller 33 is designed without the operating element 35 . furthermore , it is also possible for the activation status controller 35 to have only the operating element 35 available for activating detection of at least one input gesture of the user 28 and for the activation status controller 33 to not have a projector . fig2 shows an embodiment of the inventive method for detecting at least one input gesture of the user 28 for operating the medical imaging apparatus 10 , in particular the magnetic resonance apparatus , during the medical imaging examination , in particular a magnetic resonance examination . this method is implemented by the activation status controller 33 in collaboration with the user interface 31 . for this purpose , the activation status controller 33 has appropriate software and / or computer programs that are stored in a memory ( not shown ) of the system control computer 24 , for implementing the method , the software and / or computer programs is / are run by a processor ( not shown ) of the system control computer 24 . at the beginning of the method , detection of the at least one input gesture of the user 28 is activated by the activation status controller 33 in a first method step 100 . the activation status controller 33 for this purpose has two activation states . in a first activation state of the two activation states the activation status controller 33 controls the gesture detector 32 such that the gesture detector 32 is in a detection mode . this detection mode of the gesture detector 32 puts the gesture detector 32 in an operating state in which the gesture detector is active . furthermore , in the first activation state of the activation status controller 33 , the gesture detector 32 is also designed to detect activation gestures . in a second activation state of the two activation states of the activation status controller 33 , the gesture detector 32 is controlled by the activation status controller 33 so as to put the gesture detector 32 is in a non - detection mode . in this non - detection mode , the gesture detector 32 is not enabled for detection of an input gesture , for example a control gesture for controlling the magnetic resonance apparatus . in this non - detection mode , the gesture detector 32 , and therewith input gesture detection , is inactive . in other words , no input gesture of the user 28 can be detected . in this second activation state of the activation status controller 33 , the gesture detector 32 is configured solely to detect activation gestures . at the beginning of the method , the activation status controller 33 is in the second activation state in which the gesture detector 32 is also in non - detection mode . a current activation state of the activation status controller 33 , and therewith a current operating mode of the gesture detector 32 , is visually depicted and / or displayed for the user 28 by means of the depiction unit 34 . for this purpose , the current activation state of the activation status controller 33 is depicted in a field of view . the field of view preferably encompasses a region of the patient 17 to be examined and / or is situated inside a working region and / or a viewing direction of the user 28 . alternatively or additionally , the field of view can encompass a depiction region of the depiction unit 34 and / or a detection region of the gesture detector 32 . in the present exemplary embodiment the measuring field comprises a central and / or middle region of a surface of the body of the patient 17 . the activation state in the central and / or middle region of the surface of the body of the patient 17 is therefore depicted for the user 28 . the activation state is depicted ( visualized ) by the depiction unit 34 , in particular the projector . for this purpose a corresponding graphics symbol 37 is depicted ( fig3 and 4 ) on the surface of the body of the patient 17 . there are different graphics symbols 37 available for the different activation states of the activation status controller 33 . the different graphics symbols 37 each include a circle , wherein for the different activation states of the respective circles are identified by a different color of an area of the respective circle . this is shown in fig3 and fig4 where one of the two different activation states is projected onto the patient 17 in each case . fig4 visually depicts the second activation state in which the gesture detector is in non - detection mode . this activation state is depicted by the color red and symbolizes the second activation state to the user 28 . fig3 visually depicts the first activation state in which the gesture detector 32 is in a detection mode . this activation state is depicted by the color green and symbolizes the first activation state to the user 28 . to detect an input gesture of the user 28 a change in the activation state of the activation status controller 33 is necessary . in this connection the activation status controller 33 must change from the second activation state , in particular from the non - detection state , into the first activation state , in particular into the detection state . this change in the activation state of the activation status controller 33 is triggered by the user 28 . for this purpose , the user 28 can perform an activation gesture , causing an activation signal to be detected by the gesture detector 32 , and this triggers the first activation state and thereby brings about a change in the activation status controller 33 from the second activation state into the first activation state . the activation gesture is a clearly defined gesture and it is only by recognition of this defined activation gesture that the change in the activation status controller 33 from the second activation state into the first activation state is triggered . in the exemplary embodiment the activation gesture is a hand 38 of the user 28 being placed on the graphics symbol , in particular on the area of the circle marked with red , which symbolizes the second activation state for the user 28 . any other activation gesture that is considered expedient to those skilled in the art is possible . alternatively , the user 28 can trigger an activation signal by actuating the pedal , and thereby bring about a change in the activation status controller 33 from the second activation state into the first activation state . once the activation status controller 33 has been changed into the first activation state , input gestures and / or control gestures of the user 28 can be detected by the gesture detector 32 . after activating detection of the input gestures and / or control gestures in a subsequent method step 101 , input gestures and / or control gestures of the user 28 are detected . the input gesture and / or control gesture can be a gesture for controlling the magnetic resonance device and / or a gesture for inputting information and / or parameters for the magnetic resonance examination . this method facilitates control of the medical imaging apparatus 10 during a medical imaging examination of the examination room 29 . activating gesture recognition is intuitive for the user 28 and enables quick and immediate detection of a current activation state of the activation status controller 33 , so the user 28 can clearly see at any time whether gesture recognition is active or not . furthermore , this method enables simple activation of gesture recognition for the user 28 . in this way workflows for controlling the medical imaging examination can be optimized since , for example a physician who is carrying out an interventional examination on the patient 17 , can control the medical imaging examination directly within the examination room 19 . furthermore , misinterpretations of input gestures for controlling the medical imaging apparatus 10 can be reduced and / or prevented . depiction of the symbols for displaying the current activation state of the activation status controller 33 can be adjusted by the activation status controller 33 to an examination region of the patient 17 , so a size and / or spatial arrangement of the depicted symbols can also vary . although modifications and changes may be suggested by those skilled in the art , it is the intention of the inventors to embody within the patent warranted hereon all changes and modifications as reasonably and properly come within the scope of their contribution to the art .
in a medical imaging apparatus having a medical data acquisition scanner operated by a control computer , and an operating method therefor a gesture detector in communication with the control computer detects at least one input gesture made by a user and provides an electronic signal , in response to the at least one input gesture , to the control computer that causes the control computer to control an aspect of operation of said data acquisition scanner dependent on said at least one input gesture . detection of the at least one input gesture by the gesture detector is activated by providing an activation signal to the gesture detector from an activation status controller in response to a manual input to the activation status controller made by the user , with the gesture detector being enabled to detect the at least one input gesture only after being provided with the activation signal .