JP2013154015A - Magnetic resonance device and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make extension of imaging time as short as possible.SOLUTION: In prescanning A, combinations a-aof sequences including a navigator sequence NAV and an imaging sequence IS are performed. Then, on the basis of respiration data obtained by the navigator sequence NAV, the range AW of the exhalation end of the respiration of a subject is set. Also, from data segments Seg1-SegM obtained by the prescanning A, the data segment collected when the respiration data is included in the range AW of the exhalation end is specified. In main scanning B, among data segments Seg1-SegN needed for image reconstruction, only the remaining data segments that cannot be obtained in the prescanning A are acquired.

Description

  The present invention relates to a magnetic resonance apparatus and program for executing a main scan including a navigator sequence and an imaging sequence.

  A navigator gating technique is known as a technique for imaging a subject using a respiratory synchronization method (see Patent Document 1).

JP 2009-254392 A

  In the navigator gating technique, in order to obtain respiratory information of the subject, a prescan for the navigator is performed before the main scan. Therefore, compared with the gating technique using a respiration sensor such as a bellows, there is a problem that the imaging time is extended by the prescan time. Therefore, when imaging a subject using navigator gating technology, it is desired to extend the imaging time as much as possible.

According to a first aspect of the present invention, there is provided a first navigator sequence for acquiring respiration data of a subject and a first navigator for acquiring k-space data from an imaging region that moves by respiration of the subject. A second navigator sequence for acquiring respiration data of the subject after executing a pre-scan having a plurality of combinations of sequences including an imaging sequence, and a first navigator for acquiring k-space data from the imaging region A magnetic resonance apparatus for performing a main scan having a plurality of combinations of sequences including two imaging sequences,
Setting means for setting a respiration range when the subject is in a predetermined respiration state based on the respiration data acquired by the first navigator sequence of the pre-scan;
When the respiration data acquired by the second navigator sequence included in the sequence combination of the main scan is included in the respiration range, the second data included in the same sequence combination as the second navigator sequence. Reconstructing means using the k-space data acquired by the imaging sequence of 2 as k-space data for performing image reconstruction,
The reconstruction means includes
When the respiration data acquired by the first navigator sequence included in the combination of the pre-scan sequences is included in the respiration range, the first data included in the same sequence combination as the first navigator sequence The magnetic resonance apparatus uses k-space data acquired by one imaging sequence as k-space data for image reconstruction.

According to a second aspect of the present invention, a first navigator sequence for acquiring respiratory data of a subject and a first navigator for acquiring k-space data from an imaging region that moves by the breathing of the subject. A second navigator sequence for acquiring respiration data of the subject after executing a pre-scan having a plurality of combinations of sequences including an imaging sequence, and a first navigator for acquiring k-space data from the imaging region A program of a magnetic resonance apparatus for executing a main scan having a plurality of combinations of sequences including two imaging sequences,
A setting process for setting a respiration range when the subject is in a predetermined respiration state based on respiration data acquired by the first navigator sequence of the pre-scan;
When the respiration data acquired by the second navigator sequence included in the sequence combination of the main scan is included in the respiration range, the second data included in the same sequence combination as the second navigator sequence. A reconstruction process using the k-space data acquired by the imaging sequence of 2 as k-space data for image reconstruction;
Is a program to be executed on the computer,
The reconstruction process includes:
When the respiration data acquired by the first navigator sequence included in the combination of the pre-scan sequences is included in the respiration range, the first data included in the same sequence combination as the first navigator sequence The program uses k-space data acquired by one imaging sequence as k-space data for image reconstruction.

  When the respiration data acquired by the first navigator sequence included in the combination of the pre-scan sequences is included in the respiration range, the respiration data is acquired by the first imaging sequence included in the same sequence combination. The k-space data is used as k-space data for image reconstruction. Therefore, a part of k-space data necessary for image reconstruction can be obtained by pre-scanning, so that the time for the main scan can be shortened.

It is the schematic of the magnetic resonance apparatus of one form of this invention. It is explanatory drawing of the sequence performed with this form. It is a figure which shows the imaging | photography site | part R roughly. FIG. 10 is a diagram illustrating an example of a flow when executing pre-scan A and main scan B and acquiring image data of an imaging region R. It is a figure which shows schematically the N data segments Seg1-SegN embedded in k space. It is explanatory drawing of the prescan A. FIG. It is a figure which shows an example of the range AW at the end of breathing of a subject. 6 is an explanatory diagram of a main scan B. FIG. It is a figure which shows roughly the prescan A or the main scan B in the case of performing a navigator sequence after an imaging sequence. It is a figure which shows roughly the prescan or main scan in the case of performing a navigator sequence before and after an imaging sequence. FIG. 6 is a diagram schematically illustrating another pre-scan or main scan.

  Hereinafter, although the form for inventing is demonstrated, this invention is not limited to the following forms.

FIG. 1 is a schematic view of a magnetic resonance apparatus according to one embodiment of the present invention.
A magnetic resonance apparatus (hereinafter referred to as “MR apparatus”, MR: Magnetic Resonance) 100 includes a magnet 2, a table 3, a receiving coil 4, and the like.

  The magnet 2 has a bore 21 in which the subject 12 is accommodated, a superconducting coil 22, a gradient coil 23, a transmission coil 24, and the like. The superconducting coil 22 applies a static magnetic field, the gradient coil 23 applies a gradient magnetic field, and the transmission coil 24 transmits an RF pulse. In place of the superconducting coil 22, a permanent magnet may be used.

The table 3 has a cradle 3 a for supporting the subject 12. As the cradle 3a moves to the bore 21, the subject 12 is carried into the bore.
The receiving coil 4 is attached to the subject 12 and receives a magnetic resonance signal.

  The MR apparatus 100 further includes a sequencer 5, a transmitter 6, a gradient magnetic field power supply 7, a receiver 8, a control unit 9, an operation unit 10, and a display unit 11.

  Under the control of the control unit 9, the sequencer 5 sends information for executing the pulse sequence to the transmitter 6 and the gradient magnetic field power supply 7.

The transmitter 6 supplies a signal to the RF coil 24.
The gradient magnetic field power supply 7 supplies a signal to the gradient coil 23.
The receiver 8 processes the magnetic resonance signal received by the receiving coil 4 and outputs it to the control unit 9.

  The control unit 9 transmits necessary information to the sequencer 5 and the display unit 11 and reconstructs an image based on data received from the receiver 8 so as to realize various operations of the MR apparatus 100. The operation of each part of the MR apparatus 100 is controlled. The control unit 9 is configured by, for example, a computer. The control unit 9 includes setting means 91 to reconstruction means 94.

The setting means 91 sets a range AW (see FIG. 2) for the end of breathing of the subject.
The data segment specifying unit 92 specifies a data segment from among the plurality of data segments Seg1 to SegM (see FIG. 7).
The determination means 93 determines whether or not the respiration data of the navigator sequence is included in the range AW at the end of exhalation.
The reconstruction unit 94 performs image reconstruction.
The control part 9 is an example which comprises the setting means 91-the reconfiguration | reconstruction means 94, and functions as these means by running a predetermined program.

The operation unit 10 is operated by an operator and inputs various information to the control unit 9. The display unit 11 displays various information.
The MR apparatus 100 is configured as described above.

FIG. 2 is an explanatory diagram of a sequence executed in this embodiment, and FIG. 3 is a diagram schematically showing the imaging region R.
In this embodiment, pre-scan A and main scan B are executed.

In the main scan B, the sequence combinations b _{1 to} b _z are executed. Each sequence combination b _{1 to} b _z includes a navigator sequence NAV and an imaging sequence IS.

  The navigator sequence NAV is a sequence for detecting the position of the diaphragm of the subject and acquiring respiratory data of the subject. The imaging sequence IS is a sequence for acquiring k-space data from the imaging region R including the liver.

In addition, below the sequence combinations b _{1 to} b _z , a graph showing temporal changes in the respiratory data of the subject is shown. In this embodiment, when the respiration data acquired by the navigator sequence NAV of each combination b _{1 to} b _z of the sequence is included in the range AW of the end of breathing, it is acquired by the imaging sequence IS of the same sequence combination The k-space data is employed as image reconstruction data. For example, since the respiration data acquired by the navigator sequence NAV of the sequence combination b ₄ is included in the range AW of the end of breathing, the k-space of the k-space acquired by the imaging sequence IS of the same sequence combination b ₄ The data is adopted as data for image reconstruction. Similarly, respiration data obtained by the navigator sequence NAV combination b ₅ of the sequence, because it is included in the scope AW of end spitting breathing, k-space acquired by the imaging sequence IS combinations b ₅ of the same sequence This data is used as image reconstruction data.

On the other hand, when the respiration data acquired in the navigator sequence of each combination of sequences is out of the end-of-breathing end range AW, the k-space data acquired in the imaging sequence of the same sequence combination is image reconstructed. It is not adopted as data. For example, since the respiration data acquired by the navigator sequence NAV of the sequence combination b ₁ is out of the end range AW of the breath exhalation, k-space data acquired by the imaging sequence IS of the same sequence combination b ₁ Is not adopted as image reconstruction data. For the same reason, k-space data acquired by the imaging sequence IS of the sequence combination b ₂ and b ₃ is not adopted as image reconstruction data.

  Note that before the main scan B, the pre-scan A is executed. The pre-scan A is a scan that is executed to set the end-of-exhaust end range AW of the subject shown in FIG. In this embodiment, based on the data obtained by the pre-scan A, a range AW of the breathing end of the subject is set in advance, and the main scan B is executed. Then, the k-space data acquired when the breathing data is included in the breathing exhalation end range AW is used as image reconstruction data.

  Next, a specific method for executing pre-scan A and main scan B and acquiring image data of the imaging region R will be described.

  FIG. 4 is a diagram illustrating an example of a flow when the pre-scan A and the main scan B are executed and the image data of the imaging region R is acquired. In the following description, k-space data obtained by one imaging sequence IS is defined as one data segment, and as shown in FIG. 5, N data segments Seg1 to SegN are embedded in the k-space. A case where image data of the part R is created will be described. In FIG. 5, for convenience of explanation, only the data segments Seg1, Seg2, and Seg3 are shown with reference numerals, and the reference numerals of the other data segments are omitted.

  In step ST1, prescan A is executed. FIG. 6 is an explanatory diagram of the pre-scan A.

In prescan A, a navigator sequence NAV for acquiring respiratory data of the subject is executed. However, the pre-scan A includes the navigator sequence NAV and the imaging sequence IS in the same manner as the main scan B (see FIG. 2) in order to obtain the respiratory data of the subject under the same conditions as the main scan B. Sequence combinations a _{1 to} a _M are executed.

Since the navigator sequence NAV is repeatedly executed in the prescan A, the respiration data of the subject can be obtained in time series by executing the prescan A. Below the combination of sequences a _{1 to} a _M , a graph showing temporal changes in the respiratory data of the subject is shown.

  In the pre-scan A, the imaging sequence IS is also executed alternately with the navigator sequence NAV. Therefore, by executing the pre-scan A, a data segment representing k-space data of the imaging region R can be acquired. In prescan A, M data segments Seg1 to SegM are obtained. After performing the pre-scan A, the process proceeds to step ST2.

  In step ST2, the setting means 91 (see FIG. 1) sets the breathing end range AW of the subject based on the temporal change (see FIG. 6) in the respiratory data detected by the prescan A. FIG. 7 shows an example of a range AW of the breathing end of the subject. The exhalation end range AW can be set based on, for example, the average value of the respiration data when the subject has exhaled, and the calculated average value. After setting the discharge end range AW, the process proceeds to step ST3.

In step ST3, the data segment specifying unit 92 (see FIG. 1) is collected when the respiratory data is included in the end-of-spiking range AW from the data segments Seg1 to SegM obtained by the prescan A. Identify the data segment. In the present embodiment, it is assumed that the respiratory data of the sequence combinations a ₁ , a ₂ , a ₆ , and a ₇ are included in the end-of-spiking range AW. Therefore, the data segment specifying unit 92 collects the data segments Seg1, Seg2, Seg6, and Seg7 from the data segments Seg1 to SegM when the respiratory data is included in the range AW at the end of exhalation. As specified. After specifying the data segment, the process proceeds to step ST4.

In step ST4, the main scan B is executed.
FIG. 8 is an explanatory diagram of the main scan B.

  Among the data segments Seg1 to SegN necessary for image reconstruction, data segments Seg1, Seg2, Seg6, and Seg7 are acquired by the prescan A when the respiratory data is included in the range AW at the end of exhalation. Yes. Therefore, in the main scan B, it is not necessary to acquire from the data segment Seg1, and acquisition of the data segment is started from the data segment Seg3.

In combination b ₁ of the first sequence of the scan, the navigator sequence NAV is executed, then the imaging sequence IS for collecting data segments Seg3 is executed. The judging means 93 (see FIG. 1) judges whether or not the respiration data obtained by the navigator sequence NAV is included in the end-of-voking range AW. In the first sequence combination b ₁ , the respiration data is out of the end-of-spiking range AW. Therefore, the data segment Seg3 of the _first sequence combination b1 is discarded (that is, not adopted as a data segment for image reconstruction). After the first sequence combination b ₁ is executed, the second sequence combination b ₂ is executed.

In the second sequence combination b ₂ , the navigator sequence NAV is executed, and then the imaging sequence IS for collecting the data segment Seg 3 determined to be discarded in the _first sequence combination b ₁ is executed. . However, even in the _second sequence combination b2, the breathing data is out of the range AW at the end of exhalation. Therefore, the data segment Seg3 of the _second sequence combination b2 is also discarded (that is, not adopted as a data segment for image reconstruction). After combination b ₂ of the second sequence is executed, the combination b ₃ of the third sequence is executed.

Similarly, the sequence combination for re-acquisition of the data segment Seg3 is executed until the respiration data is included in the range AW at the end of exhalation. In FIG. 8, the respiration data acquired in the _third sequence combination b3 is also outside the end-of-voking range AW. Therefore, the data segment Seg3 of the _third sequence combination b3 is also discarded (that is, not adopted as a data segment for image reconstruction).

However, the respiration data acquired in the _fourth sequence combination b4 is included in the end-of-voking range AW. Accordingly, the data segment Seg3 of the _fourth sequence combination b4 is adopted as a data segment for image reconstruction. In this way, the data segment Seg3 is obtained. After the fourth sequence combinations b ₄ is performed, the combination b ₅ of the fifth sequence is executed. The combination b ₄ of the fourth sequence, since the data segment Seg3 range of end spitting AW obtained, in combination b ₅ of the fifth sequence, collecting the next data segment Seg4.

In the fifth combination b ₅ of the sequence, the navigator sequence NAV is executed, then the imaging sequence IS for collecting data segments Seg4 is executed. In the fifth of the combination b ₅ of the sequence, the respiratory data are included in the scope of the end spitting AW. Therefore, the data segment Seg4 of the _fifth sequence combination b5 is adopted as a data segment for image reconstruction. After the combination b ₅ of the fifth sequence is executed, the combination b ₆ of 6 th sequence is executed. In combination b ₆ of the sixth sequence, collecting the next data segment SEG5.

In combination b ₆ of the sixth sequence, navigator sequence NAV is executed, then the imaging sequence IS for collecting data segments Seg5 is executed. However, the combination b ₆ of 6 th sequence, respiration data is out of the range of end spitting AW. Therefore, the data segment Seg5 of the _sixth sequence combination b6 is discarded (that is, not adopted as a data segment for image reconstruction).

Similarly, an imaging sequence for re-acquisition of the data segment Seg5 is executed until the respiratory data is included in the end-of-spiking range AW. In FIG. 8, the respiratory data acquired in the combination of the _seventh and _eighth sequences b ₇ and b ₈ is also outside the end-of-voking range AW. Therefore, the data segment Seg5 of the _seventh and _eighth sequence combinations b7 and b8 is also discarded (that is, not adopted as a data segment for image reconstruction).

However, the respiration data acquired in the _9th sequence combination b9 is included in the end-of-vomit range AW. Therefore, the data segment Seg5 of the _ninth sequence combination b9 is adopted as a data segment for image reconstruction. In this way, the data segment Seg5 is obtained. After the combination b ₉ of 9 th sequence is executed, the combination b ₁₀ of 10 th sequence is executed. The data segments Seg6 and Seg7 are acquired by the pre-scan A when the respiratory data is included in the range AW at the end of exhalation (see FIG. 7). Therefore, the 10 th combination b ₁₀ of the sequence, without collecting data segments Seg6 and Seg7, the collection of the next data segment Seg8 performed.

  Similarly, the same data segment is repeatedly collected until the respiratory data is included in the end-of-spiking range AW. In this way, the data segment is collected, and when the data segment SegN is collected when the respiratory data is included in the end-of-spiking range AW, the scan is terminated. Then, the reconstruction unit 94 (see FIG. 1) performs image reconstruction using the data segment collected when the respiratory data is included in the range AW at the end of exhalation. In this way, the flow ends.

  In this embodiment, since image reconstruction is performed using the data segment collected when the respiratory data is included in the end-of-spiking range AW, it is possible to obtain image data with reduced body movement artifacts.

  In this embodiment, not only the navigator sequence NAV but also the imaging sequence IS is executed during the pre-scan A that is executed to set the breathing exhalation end range AW of the subject. When the respiration data detected by the prescan A is included in the range AW at the end of exhalation, the data segment collected by the imaging sequence IS of the same sequence combination is adopted as data for image reconstruction. Yes. That is, some of the N data segments Seg1 to SegN necessary for image reconstruction can be obtained by the prescan A. Therefore, in the main scan B, it is only necessary to acquire the remaining data segments that could not be obtained in the pre-scan A, so that the scan time can be shortened.

  In this embodiment, when a combination of sequences is executed, the navigator sequence is executed before the imaging sequence. However, the navigator sequence may be executed after the imaging sequence. FIG. 9 schematically shows the pre-scan A or the main scan B when the navigator sequence is executed after the imaging sequence. Even in the case of FIG. 9, since image reconstruction is performed using the data segment collected when the respiratory data is included in the end-of-suction range AW, image data with reduced body motion artifacts can be obtained. . In addition, some of the N data segments necessary for image reconstruction can be obtained by the pre-scan A, so that the scan time can be shortened.

Further, the navigator sequence may be executed before and after the imaging sequence.
FIG. 10 schematically shows the pre-scan or the main scan when the navigator sequence is executed before and after the imaging sequence.

In FIG. 10, each sequence combination has navigator sequences NAV ₁ and NAV ₂ . The navigator sequence NAV ₁ is executed before the imaging sequence IS, and the navigator sequence NAV ₂ is executed after the imaging sequence IS. Thus, each execution of each combination of sequences, and respiratory data _{d 1} by navigator sequence NAV _1, respiration data _{d 2} by navigator sequence NAV ₂ is obtained. In FIG. 10, when both the respiration data d ₁ and d ₂ are included in the end-spiking range AW, the data segment collected by the imaging sequence IS can be used as data for image reconstruction. In this case, image data with further reduced body motion artifacts can be obtained.

On the other hand, when either one of the respiration data d ₁ and d ₂ is included in the end-of-suction range AW, the data segment collected by the imaging sequence IS may be used as data for image reconstruction. In this case, if included in the scope AW of end spitting is either the respiratory data d ₁ and d _2, the data segments are used as data for image reconstruction, it is possible to further shorten the scan time .

Moreover, you may make it show in FIG. FIG. 11 shows an example in which the combination of sequences includes the navigator sequence NAV ₁ and the imaging sequence IS, and does not include the navigator sequence NAV ₂ . The combination _{b i} respiration data _{d i} by navigator sequence NAV _i of obtained sequence, respiratory data _{d i + 1} obtained by the navigator sequence _{NAV i + 1} of the combination _{b i + 1} of the next sequence. In this case, if both respiration data d _i and d _{i + 1} are included in the end-of-suction range AW, the data segment collected by the imaging sequence IS of the sequence combination b _i is used as data for image reconstruction. be able to. In addition, when either _one of the respiration data d _i and d _{i + 1} is included in the range AW at the end of exhalation, a data segment collected by the imaging sequence IS may be used as data for image reconstruction.

  In the present embodiment, when the breathing data is included in the end-of-spiping range AW, the data segment is employed as image reconstruction data. However, when the respiration data is included in a range different from the end of exhalation, the data segment may be adopted as image reconstruction data. For example, the range of the beginning of breathing is obtained based on the breathing data acquired by the prescan A, and when the breathing data is included in the range of the beginning of breathing, the data segment may be employed as data for image reconstruction. .

2 Magnet 3 Table 3a Cradle 4 Receiving coil 5 Sequencer 6 Transmitter 7 Gradient magnetic field power supply 8 Receiver 9 Control unit 10 Operation unit 11 Display unit 12 Subject 21 Bore 22 Superconducting coil 23 Gradient coil 24 Transmitting coil 91 Setting means 92 Data Segment specifying means 93 Judging means 94 Reconstructing means 100 MR apparatus

Claims (11)

A combination of sequences including a first navigator sequence for acquiring respiration data of a subject and a first imaging sequence for acquiring k-space data from an imaging region that moves by respiration of the subject. A sequence including a second navigator sequence for acquiring respiratory data of the subject and a second imaging sequence for acquiring k-space data from the imaging region after performing a plurality of pre-scans A magnetic resonance apparatus for performing a main scan having a plurality of combinations,
Setting means for setting a respiration range when the subject is in a predetermined respiration state based on the respiration data acquired by the first navigator sequence of the pre-scan;
When the respiration data acquired by the second navigator sequence included in the sequence combination of the main scan is included in the respiration range, the second data included in the same sequence combination as the second navigator sequence. Reconstructing means using the k-space data acquired by the imaging sequence of 2 as k-space data for performing image reconstruction,
The reconstruction means includes
When the respiration data acquired by the first navigator sequence included in the combination of the pre-scan sequences is included in the respiration range, the first data included in the same sequence combination as the first navigator sequence A magnetic resonance apparatus using k-space data acquired by one imaging sequence as k-space data for image reconstruction. The reconstruction means performs image reconstruction using N data segments representing k-space data,
Some of the N data segments are data segments acquired by the first imaging sequence of the pre-scan, and the remaining data segments are the second imaging of the main scan. The magnetic resonance apparatus according to claim 1, wherein the magnetic resonance apparatus is a data segment acquired by a sequence.   3. The magnetic resonance apparatus according to claim 2, further comprising a determination unit configured to determine whether or not the respiration data acquired by the second navigator sequence of the main scan is included in the respiration range. The pre-scan sequence combination has two first navigator sequences;
One first navigator sequence of the two first navigator sequences is provided before the first imaging sequence, and the other first navigator sequence is the first navigator sequence of the first navigator sequence. The magnetic resonance apparatus according to claim 2 or 3, which is provided later.   When the respiration data acquired by the one first navigator sequence or the respiration data acquired by the other first navigator sequence is included in the respiration range, the respiration data is acquired by the first imaging sequence. The magnetic resonance apparatus according to claim 4, wherein the obtained data segment is used as data for image reconstruction.   When both the respiratory data acquired by the one first navigator sequence and the respiratory data acquired by the other first navigator sequence are included in the respiratory range, the first The magnetic resonance apparatus according to claim 4, wherein a data segment obtained by one imaging sequence is used as data for image reconstruction. The sequence combination of the main scan has two second navigator sequences,
One second navigator sequence of the two second navigator sequences is provided in front of the second imaging sequence, and the other second navigator sequence is the second navigator sequence. The magnetic resonance apparatus according to any one of claims 2 to 6, which is provided later.   When the respiration data acquired by the one second navigator sequence or the respiration data acquired by the other second navigator sequence is included in the respiration range, the respiration data is acquired by the second imaging sequence. The magnetic resonance apparatus according to claim 7, wherein the obtained data segment is used as data for image reconstruction.   When both the respiratory data acquired by the one second navigator sequence and the respiratory data acquired by the other second navigator sequence are included in the respiratory range, the first The magnetic resonance apparatus according to claim 7, wherein the data segment obtained by the imaging sequence of 2 is used as data for image reconstruction.   The magnetic resonance apparatus according to any one of claims 1 to 9, wherein the respiration range is a range of a breathing end of the subject. A combination of sequences including a first navigator sequence for acquiring respiration data of a subject and a first imaging sequence for acquiring k-space data from an imaging region that moves by respiration of the subject. A sequence including a second navigator sequence for acquiring respiratory data of the subject and a second imaging sequence for acquiring k-space data from the imaging region after performing a plurality of pre-scans A magnetic resonance apparatus program for executing a main scan having a plurality of combinations,
A setting process for setting a respiration range when the subject is in a predetermined respiration state based on respiration data acquired by the first navigator sequence of the pre-scan;
When the respiration data acquired by the second navigator sequence included in the sequence combination of the main scan is included in the respiration range, the second data included in the same sequence combination as the second navigator sequence. A reconstruction process using the k-space data acquired by the imaging sequence of 2 as k-space data for image reconstruction;
Is a program to be executed on the computer,
The reconstruction process includes:
When the respiration data acquired by the first navigator sequence included in the combination of the pre-scan sequences is included in the respiration range, the first data included in the same sequence combination as the first navigator sequence A program that uses k-space data acquired by one imaging sequence as k-space data for image reconstruction.