DE102018203312A1 - Rotary transformer with reconstruction unit - Google Patents

Abstract

The invention relates to a rotary transducer for a computed tomography scanner, the computed tomography system, a system and a method for providing a medical image.
The rotary transformer according to the invention for a computer tomograph has
a rotating carrier ring,
a stationary carrier ring,
a transmitting unit,
a registration unit and
- a reconstruction unit,
- Wherein the detection unit is arranged on the rotating carrier ring and is adapted for detecting recorded by means of an X-ray unit projection data, and
wherein a transmitter of the transmitting unit is arranged on the rotating carrier ring and is designed to transmit a medical image of a patient to a receiver of a receiving unit, the receiver being arranged outside the rotating carrier ring,
characterized,
in that the reconstruction unit is arranged on the rotating carrier ring and is designed for reconstructing the medical image of the patient using the projection data.

Description

The invention relates to a rotary transducer for a computed tomograph, the computed tomograph, a system and a method for providing a medical image.

Typically, various imaging modalities, such as a computed tomography scanner, a magnetic resonance tomograph, an ultrasound machine, etc., are used for medical imaging. In particular, the computer tomograph has a rotary transformer, with projection data typically being transmitted from a rotating carrier ring of the rotary transmitter to a stationary carrier ring. Usually, the stationary carrier ring is so connected to a conventional reconstruction system of the prior art that the conventional reconstruction system can calculate a medical image using the projection data. The projection data typically requires significantly more memory than the medical image. Therefore, typically, a large amount of projection data must be transferred from the rotating carrier ring to the stationary reconstruction system via the stationary carrier ring. For this purpose, the rotary transformer typically has a transmitting unit on the rotating carrier ring and a receiving unit on the stationary carrier ring, wherein the transmitting unit and the receiving unit are dimensioned according to the high amount of projection data according to high performance. The conventional reconstruction system usually also has high-performance and therefore expensive hardware in order to process the large amount of projection data accordingly.

It is an object of the invention to provide a rotary transducer for a computed tomography scanner, a computed tomography system, a system and method for providing a medical image, wherein less data is transferred between the rotating carrier ring and the stationary carrier ring.

The object is solved by the features of the independent claims. Advantageous embodiments are described in the subclaims.

• - einen rotierenden Trägerring,
• - einen stationären Trägerring,
• - eine Sendeeinheit,
• - eine Erfassungseinheit und
• - eine Rekonstruktionseinheit auf,
• - wobei die Erfassungseinheit auf dem rotierenden Trägerring angeordnet ist und für ein Erfassen von mittels einer Röntgeneinheit aufgenommenen Projektionsdaten ausgebildet ist und
• - wobei ein Sender der Sendeeinheit auf dem rotierenden Trägerring angeordnet ist und zu einem Übertragen eines medizinischen Bildes eines Patienten an einen Empfänger einer Empfangseinheit ausgebildet ist, wobei der Empfänger außerhalb des rotierenden Trägerrings angeordnet ist,

dadurch gekennzeichnet,
dass die Rekonstruktionseinheit auf dem rotierenden Trägerring angeordnet ist und für ein Rekonstruieren des medizinischen Bildes des Patienten unter Verwendung der Projektionsdaten ausgebildet ist.The rotary transformer according to the invention for a computer tomograph has

• a rotating carrier ring,
• a stationary carrier ring,
• a transmitting unit,
• a registration unit and
• - a reconstruction unit,
• - Wherein the detection unit is arranged on the rotating carrier ring and is adapted for detecting recorded by means of an X-ray unit projection data, and
• wherein a transmitter of the transmitting unit is arranged on the rotating carrier ring and is designed to transmit a medical image of a patient to a receiver of a receiving unit, the receiver being arranged outside the rotating carrier ring,

characterized,
in that the reconstruction unit is arranged on the rotating carrier ring and is designed for reconstructing the medical image of the patient using the projection data.

The rotary transformer can typically transmit data, in particular projection data, and / or power without contact and / or contact, for example between the rotating carrier ring and the stationary carrier ring. Typically, the rotary transformer is designed for bi-directional transmission of the data. The data may be the projection data and / or control data, for example for reconstructing the medical image. For contactless transmission of the rotary transformer may for example have capacitive and / or inductive and / or optical and / or electromagnetic coupling elements. Inductive coupling elements may comprise a transformer, a magnetic core and / or coil elements. Optical coupling elements may comprise a light source and a light detector. Electromagnetic coupling elements may have antenna elements, in particular a transmitting antenna and a receiving antenna. For contact-type transmission, the rotary transformer typically has galvanic coupling elements, for example a slip ring and / or a brush. Contactless transmission may correspond to wireless transmission and / or wireless transmission.

The rotating carrier ring is rotatably mounted in particular relative to the stationary carrier ring. For example, the rotating carrier ring can rotate around a patient on a patient couch. The rotating carrier ring and the stationary carrier ring typically have an internal opening in which, for example, the patient may be positioned on the patient couch.

The detection unit, the reconstruction unit and the transmitter of the transmitting unit are in particular firmly connected to the rotating carrier ring. In other words, the detection unit, the reconstruction unit and the transmitter of the transmitting unit usually rotate with the rotating carrier ring. The registration unit, the Reconstruction unit and / or the transmitter of the transmitting unit are in particular a part of the rotating carrier ring and / or integrated in the rotating carrier ring and / or each other, for example, to a data transmission connected.

The receiver is stationary in particular compared to the transmitter. In other words, the recipient typically does not rotate around the patient. Furthermore, the receiver is in particular no part of the rotating carrier ring.

The reconstruction unit is connected to the detection unit for transmitting the projection data, for example. The detection unit can in particular receive the projection data from the X-ray unit and forward it to the reconstruction unit. In principle, it is conceivable that the detection unit is the X-ray unit. In this case, the projection data can be transmitted from the X-ray unit to the reconstruction unit. Alternatively or additionally, the detection unit may be part of the reconstruction unit. The detection unit is integrated, for example, in the reconstruction unit. In other words, the reconstruction unit in particular has the detection unit.

The detection unit may, for example, have a filter unit for data reduction of the projection data and / or a memory unit for storing the projection data. For example, the detection unit can buffer the projection data for the reconstruction unit by means of the memory unit. The projection data are typically filtered prior to reconstructing the medical image, for example by means of the filter unit of the detection unit and / or by means of a further filter unit of the reconstruction unit. The reconstructing of the medical image may include filtering the projection data and / or a filtered backprojection and / or an iterative reconstruction method. The reconstruction unit is usually designed to calculate the medical image of the patient from the projection data. The projection data is usually used as input data for reconstructing the medical image.

The projection data usually have weakening profiles, the weakening profiles being taken in particular from different angles, in particular during which the X-ray unit rotates around the patient in a circular and / or spiral manner together with the rotating carrier ring. For example, the X-ray unit may have an X-ray emitter and / or an X-ray detector for recording the projection data, in particular the attenuation profiles.

The control data can in particular initiate and / or terminate the reconstruction of the medical image in the reconstruction unit. In this case, the control data may have, for example, a start date and / or a reconstruction duration and / or a reconstruction kernel. For example, the medical image of the patient is reconstructed according to the reconstruction kernel using the projection data. In particular, the medical image of the patient can have partially or completely the control data, for example the image parameters and / or the start date.

The medical image has, for example, a tomographic image of the patient. Usually, the medical image at least partially depicts the patient. The medical image may include a whole body image of the patient. Alternatively or additionally, the medical image may include a medical image data set, wherein the medical image data set usually comprises a plurality of medical images. The medical image may alternatively or additionally comprise the plurality of medical images as a temporal sequence, in particular as a video, and / or as a spatial sequence, in particular as a stack or volume. In particular, the medical image is reconstructed in such a way that a physician, in particular a radiologist, can find the medical image comparatively in particular as if the medical image according to the prior art has been reconstructed by the conventional reconstruction system.

The rotary transformer has in particular the following advantages:

The arrangement of the reconstruction unit on the rotating carrier ring can advantageously lead to an imbalance in the rotation of the rotating carrier ring can be reduced or completely avoided. In particular, the reconstruction unit has less and / or lighter hardware compared to the conventional reconstruction system of the prior art. Namely, the conventional reconstruction system typically requires multiple graphics cards to reconstruct the medical image. The several graphics cards are usually very expensive, especially in purchasing. Typically, cooling of the reconstruction unit on the rotating carrier ring is smaller and / or smaller compared to cooling the conventional reconstruction system, in particular for cooling the plurality of graphics cards. Preferably, the reconstruction unit is distributed uniformly over the rotating carrier ring, in particular if the reconstruction unit consists of several units. In particular, when the rotating carrier ring is a weight of several hundred kilograms and / or if a rotation time of the rotating carrier ring is less than 1 s, the rotating carrier ring with the reconstruction unit, which is preferably lighter in comparison with the conventional reconstruction system, is advantageous.

A further advantage may be that the conventional reconstruction system can be completely eliminated, in particular if, for example, the control data are provided and / or input outside the conventional reconstruction system. The control data can be provided, for example, by the doctor and / or a user by means of a control system, which in particular has a display unit and an input unit, in particular a keyboard and a mouse. Typically, the control system is connected to the rotary transformer such that the control data can be transmitted from the control system to the rotating carrier ring. Furthermore, the display unit may preferably be connected to the receiver, in particular without being connected to the conventional reconstruction system, and representing the medical image.

The rotary transformer thus typically offers the advantage that only the medical image has to be transmitted by the rotating carrier ring. Accordingly, transmission of the projection data, which typically includes a larger amount of data than the medical image, may be omitted. For example, the projection data may be discarded after reconstructing the patient's medical image. In principle, it is conceivable that the projection data and the medical image are transmitted from the transmitter to the receiver.

One embodiment provides that the medical image is present on the rotating carrier ring in a DICOM image format and the transmitter of the transmitting unit is designed to transmit the medical image in DICOM image format to the receiver of the receiving unit. DICOM stands for Digital Imaging and Communications in Medicine. DICOM is typically a preferred image format for use in the clinical and / or medical environment. For example, a PACS picture archiving and communication system and / or a radiology information system may process, route and / or store the patient's medical image in the DICOM format. The medical image of the patient is preferably reconstructed on the rotating carrier ring so that the medical image can be stored in the PACS image archiving system. In principle, it is conceivable that the projection data are stored in the PACS image archiving system. Alternatives to DICOM image format include HL7, JPEG and PNG.

One embodiment provides that the medical image has a designation of the patient and that the medical image with the name of the patient is present on the rotating carrier ring. The control data in particular have image parameters, for example an image format and / or patient data, for example a gender of the patient and / or the name of the patient. The name of the patient may be a name of the patient and / or a coded string, the coded string typically being associated with the patient. In principle, it is conceivable that the name of the patient is a pseudonym and / or an anonymous description of the patient. In particular, if the medical image is reconstructed according to the DICOM image format, a header of the medical image may include the name of the patient, in particular the gender of the patient and / or the name of the patient.

One embodiment provides that the reconstruction unit has a programmable logic module, wherein the programmable logic module is designed for the reconstruction of the medical image using the projection data. The programmable logic device is optimized in particular for the reconstruction of the medical image. Typically, the programmable logic device requires less power than the multiple graphics cards. The programmable logic device is usually smaller and / or lighter compared to the multiple graphics cards. Preferably, a cooling of the programmable logic device is smaller in size compared to the cooling of the plurality of graphics cards. Usually, a computing power of the programmable logic device and the plurality of graphics cards is comparable. In principle, it is conceivable that the reconstruction unit has a plurality of programmable logic modules which are designed for reconstructing the medical image using the projection data.

One embodiment provides that the programmable logic module is an FPGA and / or a CPLD. FPGA stands for Field Programmable Gate Array and CPLD stands for Complex Programmable Logic Device. Preferably, the FPGA and / or the CPLD can process instructions particularly efficiently in parallel, while typically a processor is optimized for sequential processing of the instructions. For example, the instructions depict reconstructing the medical image.

One embodiment provides that the programmable logic module is designed to execute program code means, the program code means being written in openCL and the program code means describing the reconstruction of the medical image using the projection data. The program code means may comprise the instructions. Particularly preferred is when the programmable logic device is the FPGA and the program code means are written in openCL. The program code means in openCL of the programmable logic module preferably differ from program code means in openCL, which are created for the plurality of graphics cards, merely by a synthesis process. In other words, it is preferably possible to synthesize, in particular to translate, the program code means of the plurality of graphics cards into the program code means of the programmable logic module. This is particularly advantageous because the translation of the program code means for reconstructing the medical image is simpler than manual programming of the programmable logic module, in particular of the FPGA. Preferably, a development effort for translating the program code means is less than manual programming. Typically, therefore, the program code means of the plurality of graphics cards can be reused after the synthesis for the programmable logic device. Another advantage is that typically a product availability cycle of the programmable logic device, particularly the FPGA, is longer than a product availability cycle of the multiple graphics cards, thereby reducing the cost of replacement and / or re-provisioning of the program code means. An alternative to openCL are, for example, CUDA or VHDL.

One embodiment provides that the rotary transmitter has the receiving unit, wherein the receiver is arranged on the stationary carrier ring and wherein the transmitter and the receiver are designed for contactless or contact-type transmission of the medical image from the rotating carrier ring to the stationary carrier ring. In this case, in particular, the receiver is part of the rotary transformer, because the stationary carrier ring has the receiver, in particular the receiving unit. For example, the rotating carrier ring and the stationary carrier ring each have a capacitive coupling element for contactless transmission of the medical image and / or the control data. Preferably, a susceptibility in this embodiment is low. Another advantage of this embodiment may be that, for example, the display unit is connected by cable to the rotary transformer.

One embodiment provides that the transmitter is a wireless transmitter, wherein the receiver is a wireless receiver, wherein the wireless transmitter and the wireless receiver are designed for contactless, in particular wireless, transmission of the medical image and wherein the receiver unit is arranged outside the rotary transmitter is. The receiving unit is in particular no part of the rotary transformer and / or not integrated in the rotary transformer. The wireless receiver and the wireless transmitter are advantageously designed for wireless communication. The transmitting may include encrypting the medical image. Preferably, the medical image may be transmitted over a distance which is typically greater than a distance between the rotating carrier ring and the stationary carrier ring. For example, the display unit - preferably without being connected to the rotary transformer wired - receive the medical image wirelessly.

An embodiment provides that the transmitter and the receiver are designed for an electromagnetic transmission of the medical image. In particular, the transmitter and the receiver each have an antenna element for the electromagnetic transmission of the medical image. The electromagnetic transmission may be in accordance with a radio frequency and / or 27 GHz radio and / or 60 GHz radio and / or WiMAX and / or Bluetooth standard. Preferably, the respective antenna elements are standard components and can be purchased appropriately low.

One embodiment provides that the wireless transmission takes place according to a mobile radio standard and / or a wLAN standard. In particular, the mobile radio standard, for example 3G or 4G, and / or the wLAN standard are widely used today and are supported by many receivers. wlan stands for wireless Local Area Network.

The computer tomograph according to the invention has the rotary transmitter and the X-ray unit, which has the X-ray source and the X-ray detector for recording the projection data, wherein the X-ray unit is arranged on the rotating carrier ring.

The system according to the invention has the computed tomograph, which has the rotary transformer, wherein a personal computer and / or a mobile receiving device has the receiving unit. The personal computer and / or the mobile receiving device have, for example, the control system, in particular the display unit and / or the input unit. A notebook is For example, a personal computer and a mobile receiver. Alternatively or additionally, the mobile receiving device may be a smartphone and / or a tablet computer.

• - Erfassen der Projektionsdaten mittels der Erfassungseinheit auf dem rotierenden Trägerring des Drehübertragers des Computertomographen,
• - Rekonstruieren des medizinischen Bildes mittels der Rekonstruktionseinheit unter Verwendung der Projektionsdaten auf dem rotierenden Trägerring des Drehübertragers des Computertomographen und
• - Übertragen des medizinischen Bildes von dem Sender der Sendeeinheit des Drehübertragers von dem rotierenden Trägerring an den Empfänger der Empfangseinheit außerhalb des rotierenden Trägerrings, wodurch das medizinische Bild bereitgestellt wird.

The method according to the invention for providing the medical image of the patient by means of the computer tomograph comprises the following steps:

• Detecting the projection data by means of the detection unit on the rotating carrier ring of the rotary transformer of the computer tomograph,
• - Reconstructing the medical image by means of the reconstruction unit using the projection data on the rotating support ring of the rotary transformer of the computer tomograph and
• Transmitting the medical image from the transmitter of the transmitter unit of the rotary transmitter from the rotating carrier ring to the receiver of the receiver unit outside the rotating carrier ring, thereby providing the medical image.

One embodiment provides that prior to the reconstruction of the medical image, the program code means, which are written in openCL and describe the reconstruction of the medical image, are made available to the programmable logic module of the reconstruction unit.

Features, advantages or alternative embodiments mentioned in the description of the device are also to be applied to the method and vice versa. In other words, claims to the method can be developed with features of the device and vice versa. In particular, the device according to the invention can be used in the method.

In the following the invention will be described and explained in more detail with reference to the embodiments illustrated in the figures. Basically, in the following description of the figures, essentially identical structures and units are designated with the same reference sign as when the respective structure or unit appeared for the first time.

• 1 einen Drehübertrager in einem ersten Ausführungsbeispiel,
• 2 einen Drehübertrager in einem zweiten Ausführungsbeispiel,
• 3 ein System und
• 4 ein Verfahren.

Show it:

• 1 a rotary transformer in a first embodiment,
• 2 a rotary transformer in a second embodiment,
• 3 a system and
• 4 a procedure.

1 shows a rotary transformer 10 for a computer tomograph 30 in a first embodiment. The rotary transformer 10 has a rotating carrier ring 11 , a stationary carrier ring 12 , a transmitting unit 13 , a registration unit 14 and a reconstruction unit 15 on. The registration unit 14 is on the rotating carrier ring 11 arranged and is for detecting by means of an X-ray unit 31 recorded projection data formed. A transmitter 13.1 the transmitting unit 13 is on the rotating carrier ring 11 and is for transmitting a medical image of a patient P to a recipient 16.1 a receiving unit 16 educated. The receiving unit 16 and the receiver 16.1 are outside the rotating carrier ring 11 arranged and not in 1 shown. The reconstruction unit 15 is on the rotating carrier ring 11 and is configured for reconstructing the medical image of the patient P using the projection data.

The transmitting unit 13 , the registration unit 14 and the reconstruction unit 15 are part of the rotating carrier ring 11 and are interconnected to transmit the projection data and the medical image. The rotating carrier ring 11 and the stationary carrier ring 12 are rotatably mounted relative to each other about a rotation axis R. In particular, the rotating carrier ring 11 relative to not in 1 shown patients P rotatably mounted. Usually, the patient P is in an internal opening during an imaging examination 17 , wherein the rotating carrier ring 11 and the stationary carrier ring 12 the inner opening 17 respectively. The rotary transformer 10 can for a power supply of the transmitting unit 13 , the registration unit 14 and / or the reconstruction unit 15 have a power transmission system.

2 shows the rotary transformer 10 in a second embodiment. The rotary transformer 10 has the receiving unit 16 on. The recipient 16.1 is arranged on the stationary carrier ring. The transmitter 13.1 and the receiver 16.1 are for contactless transfer of the medical image from the rotating carrier ring 11 on the stationary carrier ring 12 educated. Alternatively, the transmitter 13.1 and the receiver 16.1 to contact-based transfer of the medical image from the rotating carrier ring 11 on the stationary carrier ring 12 be educated.

The medical image of the patient P lies on the rotating carrier ring 11 , for example in the reconstruction unit 15 , in a DICOM image format. The medical image has a name of the patient P on. The medical image with the name of the patient P lies on the rotating carrier ring 11 in front.

The reconstruction unit 15 has a programmable logic device 15.1 on, with the programmable logic device 15.1 for reconstructing the medical image using the projection data. In this embodiment, the programmable logic device is 15.1 an FPGA. Alternatively or additionally, the programmable logic module 15.1 to be a CPLD.

The programmable logic device 15.1 is designed for executing program code means. The program code means are written in openCL and describe the reconstruction of the medical image using the projection data.

The transmitter 13.1 the transmitting unit 13 is to transfer the medical image in DICOM image format to the recipient 16.1 the receiving unit 16 educated.

3 shows a system 40 , The system 40 has the computer tomograph 30 on. The computer tomograph 30 has the X-ray unit 31 on. The X-ray unit 31 has an X-ray source 31.1 and an X-ray detector 31.2 for recording the projection data. The X-ray source 31.1 and the X-ray detector 31.2 are on the rotating carrier ring 11 arranged. The receiving unit 16 is outside the rotary transformer 10 arranged. The system 40 has a mobile receiver 41 on, being the mobile receiving device 41 the receiving unit 16 having. The mobile receiver 41 is a tablet computer in this embodiment. Alternatively or additionally, the mobile receiving device 41 a personal computer or a smartphone.

In the in 3 embodiment shown is the transmitter 13.1 a wireless transmitter and the receiver 16.1 a wireless receiver. In this case, the tablet computer has the wireless receiver. The wireless transmitter and the wireless receiver are configured to contactlessly transmit the medical image. The transmitter 13.1 and the receiver 16.1 are adapted for electromagnetic transmission of the medical image. The wireless transmitter and the wireless receiver each comprise an antenna element for electromagnetic transmission of the medical image. Wireless transmission is in accordance with a wLAN standard. The wireless transmitter may receive the medical image from the rotating carrier ring 11 transferred to the tablet computer. The mobile receiver 41 has the tax system 42 on which a display unit 42.1 and an input unit 42.2 , in particular a touch screen, has. A doctor A For example, control data, in particular the name of the patient P and / or a reconstruction kernel for the reconstruction of the medical image by means of the input unit 42.2 on the tax system 42 Enter, whereupon the control data to the rotating carrier ring 11 be transmitted. After reconstructing the medical image, for example in DICOM image format and / or with the name of the patient, on the display unit 42.1 the doctor A , for example for findings.

4 shows a method for providing the medical image of the patient P by means of a computer tomograph 30 ,

step 401 characterizes the acquisition of projection data by means of a detection unit 14 on a rotating carrier ring 11 a rotary transformer 10 of the computer tomograph 30 ,

step 402 indicates that prior to reconstructing the patient's medical image P Program code means written in openCL and describing the reconstruction of the medical image, a programmable logic device 15.1 the reconstruction unit 15 to be provided.

step 403 characterizes the reconstructing of the medical image of the patient P by means of a reconstruction unit 15 using the projection data on the rotating carrier ring 11 of the rotary transformer 10 of the computer tomograph 30 ,

step 404 characterizes the transmission of the medical image of the patient P from a transmitter 13.1 a transmitting unit 13 of the rotary transformer 10 from the rotating carrier ring 11 to a receiver 16.1 a receiving unit 16.1 outside the rotating carrier ring 11 , whereby the medical image of the patient P is provided.

Although the invention has been further illustrated and described in detail by the preferred embodiments, the invention is nevertheless not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Claims (14)

Rotary transformer (10) for a computer tomograph (30), comprising - a rotating carrier ring (11), - a stationary carrier ring (12), - a transmitting unit (13), - a detection unit (14) and - a reconstruction unit (15), - wherein the detection unit (14) is arranged on the rotating carrier ring (11) and is designed for detecting projection data recorded by means of an X-ray unit (31), and - a transmitter (13.1) of the transmitting unit (13) being mounted on the rotating carrier ring (11) is arranged and for transmitting a medical image of a patient (P) to a receiver (16.1) of a receiving unit (16) is formed, wherein the receiver (16.1) outside of the rotating carrier ring (11) is arranged, characterized in that the reconstruction unit (15) is arranged on the rotating carrier ring (11) and for reconstructing the medical image of the patient (P) using the projection data e is formed. Rotary transformer (10) after Claim 1 , characterized in that the medical image of the patient (P) on the rotating carrier ring (11) in a DICOM image format and the transmitter (13.1) of the transmitting unit (13) for transmitting the medical image in the DICOM image format to the receiver (16.1) of the receiving unit (16) is formed. Rotary transmission (10) according to one of the preceding claims, characterized in that the medical image has a name of the patient (P) and that the medical image with the name of the patient (P) on the rotating support ring (11) is present. Rotary transformer (10) according to one of the preceding claims, characterized in that the reconstruction unit (15) has a programmable logic module (15.1), wherein the programmable logic module (15.1) is designed for the reconstruction of the medical image using the projection data. Rotary transformer (10) after Claim 4 , characterized in that the programmable logic device (15.1) is an FPGA and / or a CPLD. Rotary transformer (10) according to one of Claims 4 to 5 characterized in that the programmable logic device (15.1) is adapted to execute program code means, the program code means being written in openCL and the program code means describing reconstructing the medical image using the projection data. Rotary transformer (10) according to one of the preceding claims, characterized in that the rotary transformer (10) has the receiving unit (16), wherein the receiver (16.1) on the stationary support ring (12) is arranged and wherein the transmitter (13.1) and the Receiver (16.1) are formed for a contactless or contact-based transfer of the medical image of the rotating support ring (11) on the stationary support ring (12). Rotary transformer (10) according to one of Claims 1 to 6 characterized in that the transmitter (13.1) is a wireless transmitter, the receiver (16.1) being a wireless receiver, wherein the wireless transmitter and the wireless receiver are adapted to contactlessly transmit the medical image, and wherein the receiving unit (16) is arranged outside of the rotary transformer (10). Rotary transformer (10) after Claim 8 , characterized in that the transmitter (13.1) and the receiver (16.1) are designed for electromagnetic transmission of the medical image. Rotary transformer (10) according to one of Claims 8 to 9 , characterized in that the wireless transmission takes place according to a mobile radio standard and / or a wLAN standard. Computed Tomography (30), comprising - A rotary transformer (10) according to one of the preceding claims and - The X-ray unit (31) having an X-ray source (31.1) and an X-ray detector (31.2) for recording the projection data, wherein the X-ray unit (31) on the rotating support ring (11) is arranged. System (40), comprising - a computed tomograph (30) Claim 11 , which a rotary transformer (10) according to one of Claims 8 to 10 characterized in that a personal computer and / or a mobile receiving device (41) has the receiving unit (16). Method for providing a medical image of a patient (P) by means of a computer tomograph (30) comprising the following steps: - detecting projection data by means of a detection unit (14) on a rotating carrier ring (11) of a rotary transducer (10) of the computer tomograph (30) , - Reconstructing the medical image of the patient (P) by means of a reconstruction unit (15) using the projection data on the rotating carrier ring (11) of the rotary transmitter (10) of the computer tomograph (30) and transmitting the medical image of the patient (P) from a transmitter (13.1) a transmitting unit (13) of the rotary transmitter (10) from the rotating carrier ring (11) to a receiver (16.1) of a receiving unit (16) outside the rotating carrier ring (11), thereby providing the medical image of the patient (P) , Method according to Claim 13 wherein, prior to reconstructing the medical image of the patient (P), program code means written in openCL and describing reconstructing the medical image are provided to a programmable logic device (15.1) of the reconstruction unit (15).

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