JP2004267345A - Data processor and x-ray ct apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data processor providing a tomogram image generating means with projection data via a network in a short time, when the tomogram images of respective sliced surfaces are reconfigured based on the projection data obtained through scanning of a subject. <P>SOLUTION: A CPU 45 preprocesses the projection data RAW read from a second memory 46, generates projection data APRE, and write them in a first memory 43 via NIC (Network Integrated Circuit) 42. The NIC 42 reads the projection data APRE from the first memory 43 in response to a request from the CPU 45 and transmits them to a reconfiguration part via a network switch 15. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a data processing apparatus in which a CPU and a NIC are connected by a bus, a data processing apparatus that reconstructs a tomographic image of each slice plane based on projection data obtained by scanning a subject, and an X-ray CT apparatus.
[0002]
[Prior art]
As a radiation tomographic imaging apparatus, for example, an X-ray CT (Computed Tomography) apparatus using X-rays as radiation is known.
An X-ray CT apparatus rotates around a subject while irradiating the subject with X-rays in a state in which the radiation irradiation / detection system, that is, the X-ray irradiation / detection system is opposed to each other across the subject (scan (scan ( Scan)), the X-rays transmitted through the subject in a plurality of directions around the subject are detected by a detection system, and the projection data of the subject by the X-rays is measured, and the projection data is calculated. It is configured to generate (reconstruct) a tomographic image based on it.
[0003]
FIG. 6 is a diagram showing a configuration of a data processing device 75 including a data acquisition unit (DA) and an image reconstruction unit incorporated in a conventional X-ray CT apparatus.
As shown in FIG. 6, the preprocessing units 71_1, 71_2, and 71_3, the shared memory 72, and the reconfiguration units (tomographic image generation units) 73_1 and 73_2 are connected via the internal bus 70.
The preprocessing units 71_1, 71_2, and 71_3 perform preprocessing on the projection data obtained by scanning the subject in the scanning gantry, and write the preprocessed projection data to the shared memory 72 via the internal bus 70. .
The reconstructing units 73_1 and 73_2 read projection data from the shared memory 72 via the internal bus 70, and read the projection data based on the projection data in the axial direction (the direction of loading / unloading the subject into / from the X-ray irradiation space in the scanning gantry 2). ) Performs a helical view weighting process for reconstructing an image by performing linear interpolation.
The reconstruction units 73_1 and 73_2 use some of the same projection data in the helical view weighting process.
Therefore, the same projection data is repeatedly transferred from the shared memory 72 to the reconstruction units 73_1 and 73_2.
In the configuration shown in FIG. 6, one of the preprocessing units 71_1, 71_2, 71_3 and the reconfiguration units 73_1, 73_2, which has acquired the bus use right by bus arbitration (Bus Arbitration), performs data transmission via the internal bus 70. It can be carried out.
[0004]
[Problems to be solved by the invention]
However, in the data processing device 75 shown in FIG. 6 described above, the reconstructing unit 73_2 reads the projection data from the shared memory 72 while the reconstructing unit 73_1 is reading the projection data from the shared memory 72 via the internal bus 70. However, there is a problem that this becomes a bottleneck to advance the end timing of the helical view weighting process.
[0005]
Some data processing devices that transmit stored data via a network include an NIC (Network Integrated Circuit), a CPU (Central Processing Unit), and a memory connected via an internal bus.
In such a data processing device, when data read from a memory is frequently transmitted to a network via an NIC, data transfer between the memory and the NIC via an internal bus frequently occurs, and a data bus of the data bus is generated. There is a problem that the load increases and the time from receiving a request to sending data to the network cannot be reduced.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the related art, and in a data processing device having a configuration in which a CPU and an NIC are connected via an internal bus, the transfer load on the internal bus can be reduced, and furthermore, it is possible to receive a request from a request. It is an object of the present invention to provide a data processing device capable of transmitting data to a network in a short time from the network.
Further, according to the present invention, when reconstructing a tomographic image of each slice plane based on projection data obtained by scanning a subject, it is possible to provide projection data in a short time to a tomographic image generating means via a network. It is an object to provide a data processing device and an X-ray CT device.
Also, the present invention provides a data processing method capable of providing projection data to a plurality of tomographic image generating means in a short time when reconstructing a tomographic image of each slice plane based on projection data obtained by scanning a subject. It is an object to provide an apparatus and an X-ray CT apparatus.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a data processing device according to a first aspect of the present invention is a data processing device that transmits data via a network, wherein the first processing unit generates data, and the data processing device transmits the data via an internal bus. A second processing unit connected to the first processing unit for performing a data transmission process via the network; and the first processing unit directly connected to the second processing unit without passing through the internal bus. And a storage unit for storing the data generated by the storage unit. The second processing unit transmits the data read from the storage unit via the network.
[0008]
The operation of the data processing device of the first invention is as follows.
First processing means generates data.
Then, the first processing means writes the generated data into the storage means.
Upon receiving the instruction, the second processing means transmits the data read from the storage means via the network.
[0009]
A data processing device according to a second aspect of the present invention is a data processing device that reconstructs a tomographic image of each slice plane based on projection data obtained by scanning a subject, and is obtained by scanning the subject. Preprocessing means for performing preprocessing on the generated first projection data to generate second projection data, connected to the preprocessing means via a network, and receiving from the preprocessing means via the network Tomographic image generating means for generating the tomographic image data based on the second projection data, wherein the pre-processing means performs the pre-processing on the first projection data and A first processing unit for generating the second projection data, and a process for transmitting the second projection data to the tomographic image generation means via the network, the processing being connected to the first processing unit via an internal bus. Second processing for performing And a storage unit that is directly connected to the second processing unit without passing through the internal bus and stores the second projection data generated by the first processing unit. Performs a process of transmitting the second projection data read from the storage unit to the tomographic image generation unit via the network.
[0010]
The operation of the data processing device of the second invention is as follows.
In the preprocessing means, a first processing unit performs the preprocessing on the first projection data to generate the second projection data.
Then, the first processing unit stores the second projection data in the storage unit.
Next, the second processing unit performs a process of transmitting the second projection data read from the storage unit to a tomographic image generation unit via a network in response to a request.
Next, tomographic image generating means generates the tomographic image data based on the second projection data received from the preprocessing means via the network.
[0011]
The data processing apparatus of the second invention preferably has a plurality of the pre-processing means and a plurality of the tomographic image generating means, and the first processing section obtains the object by performing a helical scan. The pre-processing is performed on the obtained first projection data to generate the second projection data, and the second processing unit transmits the second projection data read from the storage unit to the network. The tomographic image generating means transmits the tomographic image to the tomographic image generating means a plurality of times, and the tomographic image generating means performs linear interpolation on the basis of the second projection data received from the second processing unit via the network. Helical view weighting processing for reconstructing is performed.
[0012]
A data processing device according to a third aspect of the present invention is a data processing device that transmits the projection data to a plurality of tomographic image generation devices that reconstruct a tomographic image of each slice plane based on projection data obtained by scanning a subject. A first processing unit configured to perform preprocessing on the first projection data obtained by scanning the subject to generate the second projection data, and the device via an internal bus. A second processing unit that is connected to a first processing unit and performs a process of transmitting the second projection data to the tomographic image generation unit via a network; and a second processing unit that does not pass through the internal bus. A storage unit that is directly connected to the unit and stores the second projection data generated by the first processing unit, wherein the second processing unit reads the second projection data read from the storage unit. Sending the data to the tomographic image generating means through the network It performs a process of transmitting over.
[0013]
An X-ray CT apparatus according to a fourth aspect of the present invention is an X-ray CT apparatus that reconstructs a tomographic image of each slice plane based on projection data obtained by scanning an object. Scanning means for generating one projection data, preprocessing means for performing preprocessing on the first projection data generated by the scanning means to generate second projection data, the preprocessing means, and a network And tomographic image generating means for generating the tomographic image data based on the second projection data received from the preprocessing means via the network, wherein the preprocessing means comprises: A first processing unit that performs the preprocessing on the first projection data to generate the second projection data, and is connected to the first processing unit via an internal bus, and Data to the tomographic image generating means A second processing unit that performs processing for transmitting the data via the network, and the second projection data that is directly connected to the second processing unit without passing through the internal bus and generated by the first processing unit. And a second processing unit that performs a process of transmitting the second projection data read from the storage unit to the tomographic image generation unit via the network.
[0014]
An X-ray CT apparatus according to a fifth aspect of the present invention is an X-ray CT apparatus that reconstructs a tomographic image of each slice plane based on projection data obtained by scanning an object. Data receiving means for receiving the received data, preprocessing means for performing preprocessing on the first projection data received by the data collecting means to generate second projection data, and receiving from the preprocessing means Tomographic image generating means for generating the tomographic image data based on the second projection data, wherein the data collecting means, the preprocessing means and the tomographic image generating means are connected via a network, The preprocessing unit is connected to the first processing unit that performs the preprocessing on the first projection data to generate the second projection data, and is connected to the first processing unit via an internal bus. , The second projection data A second processing unit that performs a process of transmitting the tomographic image to the tomographic image generation unit via the network, and is directly connected to the second processing unit without passing through the internal bus, and generated by the first processing unit. A storage unit for storing the second projection data, wherein the second processing unit transmits the second projection data read from the storage unit to the tomographic image generation unit via the network Perform processing.
[0015]
An X-ray CT apparatus according to a sixth aspect of the present invention is an X-ray CT apparatus that reconstructs a tomographic image of each slice plane based on projection data obtained by scanning a subject. Data receiving means for receiving the received data, preprocessing means for performing preprocessing on the first projection data received by the data collecting means to generate second projection data, and receiving from the preprocessing means Tomographic image generating means for generating the tomographic image data based on the second projection data, wherein the data collecting means and the preprocessing means are connected in the same data processing device via an internal bus. The data processing apparatus and the tomographic image generation unit are connected via a network, and the preprocessing unit performs the preprocessing on the first projection data to generate the second projection data. First to generate A processing unit, a second processing unit connected to the first processing unit via an internal bus, and performing a process of transmitting the second projection data to the tomographic image generation unit via the network; A storage unit that is directly connected to the second processing unit without passing through an internal bus, and stores the second projection data generated by the first processing unit, wherein the second processing unit A process of transmitting the second projection data read from the storage unit to the tomographic image generation unit via the network is performed.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an X-ray CT apparatus according to an embodiment of the present invention will be described.
FIG. 1 is an overall configuration diagram of an X-ray CT apparatus 1 according to an embodiment of the present invention.
As shown in FIG. 1, the X-ray CT apparatus 1 includes, for example, a scanning gantry 2 and a data processing device 3.
Here, the X-ray CT apparatus 1 corresponds to the X-ray CT apparatus of the fourth invention, and the data processing apparatus 3 corresponds to the data processing apparatus of the second invention.
The data processing device 3 includes an operation unit 10, a display unit 11, a host computer 12, a DA (data collection device) 14, a network switch 15, and a reconfiguration device 16.
The DA 14 includes a data collection buffer 21 and N (plural) preprocessing units 22_1 to 22_N.
Here, the pre-processing units 22_1 to 22_N correspond to the data processing devices of the first and third inventions and the pre-processing means of the second invention.
In addition, the reconfiguration device 16 includes M (a plurality of) reconfiguration units 16_1 to 16_M.
The reconfiguration units 16_1 to 16_M and the preprocessing units 22_1 to 22_N are connected to the network switch 15.
Here, the reconstruction units 16_1 to 16_M correspond to the tomographic image generation means of the second and fourth inventions and the tomographic image generation device of the third invention.
[0017]
The scanning gantry 2 performs a helical scan around the subject while irradiating the subject with X-rays in a state in which the radiation irradiation / detection system, that is, the X-ray irradiation / detection system is opposed to each other across the subject, The detection system detects X-rays transmitted through the subject in a plurality of directions around the subject, generates projection data RAW of the subject by the X-rays, and outputs the generated projection data to the data processing device 3. .
[0018]
The data processing device 3 performs a reconstruction process based on the projection data RAW input from the scanning gantry 2 to generate tomographic image data.
Hereinafter, each component of the data processing device 3 will be described.
The operation unit 10 is a keyboard or the like for inputting an operation instruction from the user to the host computer 12.
The display unit 11 displays an image corresponding to an image signal input from the host computer 12.
The host computer 12 generates an image signal based on the tomographic image data IM of each slice input from the reconstruction units 16_1 to 16_M, and outputs this to the display unit 11. Thereby, the tomographic image of each slice is displayed on the display unit 11.
[0019]
The data acquisition buffer 21 inputs the projection data RAW of the helical scan for a plurality of views from the scanning gantry 2 and stores it.
The preprocessing units 22_1 to 22_N perform, as preprocessing for tomographic image data generation, the projection data RAW read from the data acquisition buffer 21, reference correction for correcting the influence of fluctuation in X-ray beam intensity, and The projection data APRE is generated by performing at least one process of inter-channel sensitivity correction for correcting sensitivity variations between channels of the X-ray detector array.
The preprocessing units 22_1 to 22_N transmit the projection data APRE to the reconfiguration units 16_1 to 16_M via the network switch 15.
[0020]
FIG. 2 is a configuration diagram of the preprocessing unit 22_1 shown in FIG.
Note that the preprocessing units 22_2 to 22_N have the same configuration as the preprocessing unit 22_1.
2, the preprocessing unit 22_1 includes, for example, an NIC (network integrated circuit) 42, a first memory 43, a chipset 44, a CPU 45, and a second memory 46.
[0021]
Here, the CPU 45 corresponds to the first processing unit and the first processing unit of the present invention, the NIC 42 corresponds to the second processing unit and the second processing unit of the present invention, and the first memory 43 corresponds to the main processing unit. The internal bus 41 corresponds to the internal bus of the present invention, corresponding to the storage means and the storage section of the present invention.
[0022]
The NIC 42 and the chipset 44 are connected via the internal bus 41.
The first memory 43 is, for example, a semiconductor memory, and is directly connected to the NIC 42 without passing through the internal bus 41.
The CPU 45 and the second memory 46 are directly connected to the chipset 44 without passing through the internal bus 41.
[0023]
The second memory 46 is, for example, a semiconductor memory. When the scanning gantry 2 is connected to the network switch 15, the second memory 46 is transmitted from the scanning gantry 2 via the network switch 15, the NIC 42, the internal bus 41, and the chipset 44. The input projection data RAW is stored.
When the scanning gantry 2 is connected to the internal bus 41, the second memory 46 stores the projection data RAW input from the scanning gantry 2 via the internal bus 41 and the chipset 44.
[0024]
The CPU 45 performs, for the projection data RAW read out from the second memory 46 via the chipset 44, a reference correction for correcting the influence of the fluctuation of the X-ray beam intensity, and a correction between the channels of the X-ray detector array. Preprocessing such as inter-channel sensitivity correction for correcting sensitivity variations is performed to generate projection data APRE.
The CPU 45 writes the projection data APRE into the first memory 43 via the internal bus 41 and the NIC 42.
[0025]
The NIC 42 performs data transmission processing with the reconfiguration units 16_1 to 16_M via the network switch 15.
The NIC 42 transmits the projection data APRE read from the first memory 43 to the designated reconstructing unit among the reconstructing units 16_1 to 16_M via the network switch 15 in response to an instruction from the CPU 45.
[0026]
The network switch 15 is a LAN switch, a bridge, or the like that constructs a network between the reconfiguration units 16_1 to 16_M and the preprocessing units 22_1 to 22_N, and operates between the reconfiguration units 16_1 to 16_M and the preprocessing units 22_1 to 22_N. Realizes data exchange (communication) of a plurality of systems at the same time.
[0027]
The reconstructing units 16_1 to 16_M receive the projection data APRE from the designated preprocessing unit among the preprocessing units 22_1 to 22_N via the network switch 15, and perform, for example, linear interpolation in the axial direction based on the received projection data APRE. Is performed to perform a helical view weighting process for reconstructing an image, and tomographic image data of each slice is generated.
The reconstruction units 16_1 to 16_M output the generated tomographic image data to the host computer 12.
[0028]
FIG. 3 is a diagram schematically illustrating a process of generating tomographic image data in the reconstruction units 16_1 to 16_3.
For example, in the preprocessing units 22_1 to 22_N, the projection data APRE is generated based on the projection data RAW input from the scanning gantry 2.
Here, of the projection data APRE, the preprocessing unit 22_1 generates the projection data A, B, and C, the preprocessing unit 22_2 generates the projection data D, E, and F, and the preprocessing unit 22_3 generates the projection data G and Consider the case where H is generated.
The reconstruction unit 16_1 receives the projection data A, B, and C from the pre-processing unit 22_1 via the network switch 15, and generates tomographic image data X1 using the data.
The reconstruction unit 16_2 receives the projection data B, C, and D from the preprocessing units 22_1 and 22_2 via the network switch 15, and generates tomographic image data X2 by using the projection data B, C, and D.
The reconstruction unit 16_3 receives the projection data B, C, and D from the pre-processing units 22_1 and 22_2 via the network switch 15, and generates tomographic image data X3 using the data.
As described above, in the present embodiment, tomographic image data is generated based on the same projection data among the reconstruction units 16_1 to 16_M. Therefore, the preprocessing units 22_1 to 22_N repeatedly transmit the same projection data to the plurality of reconstruction units 16_1 to 16_M.
[0029]
Hereinafter, an operation example of the X-ray CT apparatus 1 will be described with reference to FIG.
The scanning gantry 2 performs a helical scan around the subject while irradiating the subject with X-rays in a state in which the radiation irradiating / detecting system, that is, the X-ray irradiating / detecting system is opposed to the subject, The detection system detects X-rays transmitted through the subject in a plurality of view directions around the subject, generates projection data RAW of the subject by the X-rays, and outputs the data to the data processing device 3.
The projection data RAW is stored in the data collection buffer 21 of the data processing device 3.
Next, the preprocessing units 22_1 to 22_N store the projection data RAW read from the data collection buffer 21, for example, in the second memory 46 illustrated in FIG.
Next, in each of the pre-processing units 22_1 to 22_N, the CPU 45 reads the projection data RAW from the second memory 46 via the chipset 44 and performs pre-processing on the projection data RAW to generate projection data APRE. I do.
Next, the CPU 45 outputs the projection data APRE to the NIC 42 via the internal bus 41, and the NIC 42 writes the projection data APRE to the first memory 43.
Thereafter, the reconfiguration units 16_1 to 16_M output read requests to predetermined preprocessing units 22_1 to 22_N via the network switch 15.
[0030]
Next, the CPU 45 of the pre-processing units 22_1 to 22_N requests the NIC 42 to transmit the specified projection data APRE to the reconstruction units 16_1 to 16_M, which are the transmission sources of the read request, based on the read request.
The NIC 42 reads the specified projection data APRE from the first memory 43 in response to a request from the CPU 45 and transmits the read projection data APRE to the reconfiguration units 16_1 to 16_M of the transmission source via the network switch 15.
As described above, since the NIC 42 reads the projection data APRE from the first memory 43 directly connected to the NIC 42 without passing through the internal bus 41 and transmits the projection data APRE to the network switch 15, the NIC 42 receives requests from the reconfiguration units 16_1 to 16_M. After that, the projection data APRE can be provided to the reconstruction units 16_1 to 16_M in a shorter time than before.
[0031]
At this time, transmission of the projection data APRE from the preprocessing units 22_1 to 22_N to the reconfiguration units 16_1 to 16_M via the network switch 15 can be performed simultaneously by a plurality of systems.
For example, transmission of the projection data APRE from the reconstruction unit 16_1 to the preprocessing unit 22_1 and transmission of the projection data APRE from the reconstruction unit 16_2 to the preprocessing unit 22_2 can be performed in parallel. For this reason, the projection data APRE can be provided from the preprocessing units 22_1 to 22_N to the reconstructing units 16_1 to 16_M in a shorter time than before.
[0032]
Next, based on the projection data APRE received from the preprocessing units 22_1 to 22_N via the network switch 15, the reconstructing units 16_1 to 16_M perform helical view weighting processing for reconstructing an image by performing linear interpolation in the axial direction. To generate the tomographic image data IM of each slice.
Next, the reconstruction units 16_1 to 16_M output the generated tomographic image data IM to the host computer 12.
The host computer 12 generates an image signal based on the tomographic image data IM of each slice input from the reconstruction units 16_1 to 16_M, and outputs this to the display unit 11.
Thereby, the tomographic image of each slice is displayed on the display unit 11.
[0033]
As described above, according to the X-ray CT apparatus 1, the NIC 42 of the preprocessing units 22_1 to 22_N reads the projection data APRE from the first memory 43 directly connected to the NIC 42 without passing through the internal bus 41, and Since the data is transmitted to the switch 15, the projection data APRE can be provided to the reconstruction units 16_1 to 16_M in a shorter time than in the related art after receiving a request from the reconstruction units 16_1 to 16_M.
Further, according to the X-ray CT apparatus 1, the transmission of the projection data APRE from the preprocessing units 22_1 to 22_N to the reconstruction units 16_1 to 16_M via the network switch 15 can be performed simultaneously by a plurality of systems. The projection data APRE can be provided from the pre-processing units 22_1 to 22_N to the reconstructing units 16_1 to 16_M in a shorter time than before.
[0034]
The present invention is not limited to the embodiments described above.
In the above-described embodiment, the case where the present invention is applied to the X-ray CT apparatus 1 has been described as an example. The present invention can also be applied to other data processing devices that transmit data to other devices.
[0035]
Further, in the embodiment of the present invention, for example, as illustrated in FIG. 4, the preprocessing blocks 22_1 to 22_N, the data collection buffer 21, and the reconfiguration blocks 16_1 to 16_M may be connected to the network switch 15.
In this case, the projection data RAW from the scanning gantry 2 is input via the interface 51 of the data acquisition buffer 21 and written into the memory 53 via the chipset 52.
Then, the projection data RAW is read from the memory 53, stored in the database 55 via the chipset 52, and via the SCSI (Small Computer System Interface) controller 54.
Subsequently, the projection data RAW is output to the preprocessing blocks 22_1 to 22_N via the SCSI controller 54, the NIC 56, and the network switch 15.
Then, the projection data RAW is stored in the memory 46 via the NIC 44 and the chipset 44 in the preprocessing blocks 22_1 to 22_N.
Subsequently, the CPU 45 performs pre-processing on the projection data RAW read from the memory 46 to generate projection data APRE, and writes this into the memory 43.
Then, the NIC 44 outputs the projection data APRE read from the memory 43 to the reconfiguration units 16_1 to 16_M via the network switch 15.
[0036]
Further, as shown in FIG. 5, the pre-processing block 22_1 and the data collection buffer 21 may be arranged in the same data processing device 90.
In this case, an interface 61 and a SCSI controller 62 are connected to the internal bus 43 in addition to the NIC 42 and the chipset 44.
In this case, the projection data RAW from the scanning gantry 2 is input to the data processing device 90 via the interface 61, and is stored in the database 63 via the SCSI controller 62.
Subsequently, the projection data RAW is stored in the memory 46 via the SCSI controller 62, the internal bus 43, and the chipset 44.
The CPU 45 performs pre-processing on the projection data RAW read from the memory 46 to generate projection data APRE, and stores this in the memory 43 via the NIC 42.
Then, the projection data APRE read from the memory 43 is output by the NIC 44 to the reconfiguration unit 16_1 via the network switch 15.
[0037]
【The invention's effect】
As described above, according to the data processing device of the first invention, in the data processing device having the configuration in which the first processing means and the second processing means are connected via the internal bus, The transfer load can be reduced, and data can be sent to the network in a short time after receiving a request.
According to the data processing apparatuses of the second and third inventions and the X-ray CT apparatus of the fourth invention, a tomographic image of each slice plane is reproduced based on projection data obtained by scanning a subject. When configured, projection data can be provided to the tomographic image generating means (apparatus) in a short time via a network.
According to the data processing apparatuses of the second and third inventions and the X-ray CT apparatuses of the fourth, fifth and sixth inventions, each slice is obtained based on the projection data obtained by scanning the subject. When reconstructing a tomographic image of a plane, projection data can be provided to a plurality of tomographic image generating means (devices) in a short time.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of an X-ray CT apparatus according to an embodiment of the present invention.
FIG. 2 is a configuration diagram of a preprocessing unit shown in FIG. 1;
FIG. 3 is a diagram schematically illustrating a process of generating tomographic image data in the reconstruction unit illustrated in FIG. 1;
FIG. 4 is a configuration diagram of an X-ray CT apparatus according to a modification of the embodiment of the present invention.
FIG. 5 is a configuration diagram of an X-ray CT apparatus according to another modification of the embodiment of the present invention.
FIG. 6 is a diagram showing a configuration of a data processing device including a data acquisition unit (DA) and an image reconstruction unit incorporated in a conventional X-ray CT apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... X-ray CT apparatus, 2 ... scanning gantry, 3 ... data processing apparatus, 10 ... operation part, 11 ... display part, 12 ... host computer, 14 ... DA, 15 ... network switch, 16 ... reconstruction apparatus, 16_1- 16_M: Reconstruction unit, 22_1 to 22_N: Preprocessing unit, 41: Internal bus, 42: NIC, 43: First memory, 44: Chipset, 45: CPU, 46: Second memory

Claims (12)

A data processing device for transmitting data via a network,
First processing means for generating data;
A second processing unit connected to the first processing unit via an internal bus and performing a data transmission process via the network;
A storage unit that is directly connected to the second processing unit without passing through the internal bus and stores the data generated by the first processing unit;
The data processing device, wherein the second processing unit transmits the data read from the storage unit via the network. 2. The data processing device according to claim 1, wherein the storage unit stores the data that the second processing unit transmits a plurality of times via the network. A data processing apparatus for reconstructing a tomographic image of each slice plane based on projection data obtained by scanning the subject,
Preprocessing means for performing preprocessing on first projection data obtained by scanning the subject to generate second projection data;
A tomographic image generating unit connected to the preprocessing unit via a network, and generating the tomographic image data based on the second projection data received from the preprocessing unit via the network,
The pre-processing means,
A first processing unit that performs the pre-processing on the first projection data to generate the second projection data;
A second processing unit that is connected to the first processing unit via an internal bus and performs a process of transmitting the second projection data to the tomographic image generation unit via the network;
A storage unit that is directly connected to the second processing unit without passing through the internal bus and stores the second projection data generated by the first processing unit;
The data processing device, wherein the second processing unit performs a process of transmitting the second projection data read from the storage unit to the tomographic image generation unit via the network. A plurality of said preprocessing means;
A plurality of tomographic image generating means,
The first processing unit generates the second projection data by performing the pre-processing on the first projection data obtained by performing a helical scan on the subject,
The second processing unit transmits the second projection data read from the storage unit to the tomographic image generation unit via the network a plurality of times,
4. The helical view weighting process for reconstructing a tomographic image by performing linear interpolation based on the second projection data received from the second processing unit via the network, wherein the tomographic image generating unit performs a helical view weighting process. A data processing device according to claim 1. A process of transmitting the second projection data from the first preprocessing unit to the first tomographic image generating unit, and a process of transmitting the second projection data from the second processing unit to the second tomographic image generating unit. The data processing apparatus according to claim 4, wherein the transmission processing of the projection data is performed in parallel. The second processing unit of the plurality of preprocessing units and the plurality of tomographic image generation units are connected via a network switch,
The data processing device according to claim 4, wherein the second processing unit transmits the second projection data to the tomographic image generation unit via the network switch. The data processing device according to claim 3, wherein the second processing unit is a network integrated circuit that performs a protocol process of data communication via the network switch. The first processing unit includes at least one of a reference correction for correcting an influence due to a change in X-ray beam intensity and an inter-channel sensitivity correction for correcting a sensitivity variation between channels of the X-ray detector array. The data processing apparatus according to claim 3, wherein processing is performed on the first projection data as the preprocessing. A data processing device that transmits the projection data to a plurality of tomographic image generation devices that reconstruct a tomographic image of each slice plane based on projection data obtained by scanning the subject,
A first processing unit that performs preprocessing on first projection data obtained by scanning the subject to generate the second projection data;
A second processing unit that is connected to the first processing unit via an internal bus and performs a process of transmitting the second projection data to the tomographic image generation unit via a network;
A storage unit that is directly connected to the second processing unit without passing through the internal bus and stores the second projection data generated by the first processing unit;
The data processing device, wherein the second processing unit performs a process of transmitting the second projection data read from the storage unit to the tomographic image generation unit via the network. An X-ray CT apparatus for reconstructing a tomographic image of each slice plane based on projection data obtained by scanning a subject,
Scanning means for scanning the subject to generate first projection data;
Preprocessing means for performing preprocessing on the first projection data generated by the scanning means to generate second projection data;
A tomographic image generating unit connected to the preprocessing unit via a network, and generating the tomographic image data based on the second projection data received from the preprocessing unit via the network,
The pre-processing means,
A first processing unit that performs the pre-processing on the first projection data to generate the second projection data;
A second processing unit that is connected to the first processing unit via an internal bus and performs a process of transmitting the second projection data to the tomographic image generation unit via the network;
A storage unit that is directly connected to the second processing unit without passing through the internal bus and stores the second projection data generated by the first processing unit;
The X-ray CT apparatus, wherein the second processing unit performs a process of transmitting the second projection data read from the storage unit to the tomographic image generation unit via the network. An X-ray CT apparatus for reconstructing a tomographic image of each slice plane based on projection data obtained by scanning a subject,
Data collection means for receiving data obtained by scanning the subject;
Preprocessing means for performing preprocessing on the first projection data received by the data collection means to generate second projection data;
Tomographic image generating means for generating the tomographic image data based on the second projection data received from the preprocessing means,
The data collection unit, the pre-processing unit and the tomographic image generation unit are connected via a network,
The pre-processing means,
A first processing unit that performs the pre-processing on the first projection data to generate the second projection data;
A second processing unit that is connected to the first processing unit via an internal bus and performs a process of transmitting the second projection data to the tomographic image generation unit via the network;
A storage unit that is directly connected to the second processing unit without passing through the internal bus and stores the second projection data generated by the first processing unit;
The X-ray CT apparatus, wherein the second processing unit performs a process of transmitting the second projection data read from the storage unit to the tomographic image generation unit via the network. An X-ray CT apparatus for reconstructing a tomographic image of each slice plane based on projection data obtained by scanning a subject,
Data collection means for receiving data obtained by scanning the subject;
Preprocessing means for performing preprocessing on the first projection data received by the data collection means to generate second projection data;
Tomographic image generating means for generating the tomographic image data based on the second projection data received from the preprocessing means,
The data collection means and the preprocessing means are connected in the same data processing device via an internal bus,
The data processing device and the tomographic image generation unit are connected via a network,
The pre-processing means,
A first processing unit that performs the pre-processing on the first projection data to generate the second projection data;
A second processing unit that is connected to the first processing unit via an internal bus and performs a process of transmitting the second projection data to the tomographic image generation unit via the network;
A storage unit that is directly connected to the second processing unit without passing through the internal bus and stores the second projection data generated by the first processing unit;
The X-ray CT apparatus, wherein the second processing unit performs a process of transmitting the second projection data read from the storage unit to the tomographic image generation unit via the network.

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