1-10. (canceled)
11. A method of transmitting and receiving a signal for a relay station in a wireless communication system, the method comprising:
configuring a subframe, including a plurality of OFDM (orthogonal frequency division multiplexing) symbols in a time domain, as an MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframe; and
receiving a backhaul signal from a base station in the subframe,
wherein OFDM symbols used for the reception of the backhaul signal start from a second OFDM symbol, a third OFDM symbol, or a fourth OFDM symbol of the subframe.
12. The method of claim 11, wherein the subframe comprises a first slot and a second slot in the time domain.
13. The method of claim 12, wherein both the first slot and the second slot comprise 7 OFDM symbols in a normal cyclic prefix (CP).
14. The method of claim 13, wherein the backhaul signal comprises an R-PDCCH (relay-physical downlink control channel) which is a control channel to the relay station from the base station, and the R-PDCCH is transmitted through the first slot or the second slot by the base station.
15. The method of claim 14, when the R-PDCCH is transmitted through the first slot, the transmission of the R-PDCCH starting from a fourth OFDM symbol of the first slot.
16. The method of claim 13, wherein the backhaul signal comprises an R-PDSCH (relay-physical downlink shared channel) which is a data channel to the relay station from the base station, and the R-PDSCH is transmitted from a second OFDM symbol, a third OFDM symbol, or a fourth OFDM symbol of the first slot.
17. The method of claim 16, wherein the R-PDSCH is transmitted until a sixth OFDM symbol or a seventh OFDM symbol of the second slot.
18. The method of claim 17, wherein if the subframe and a subframe at which the base station transmits the backhaul signal are transmitted with time aligned subframe boundaries, the R-PDSCH is transmitted until the sixth OFDM symbol of the second slot, otherwise the R-PDSCH is transmitted until the seventh OFDM symbol of the second slot.
19. The method of claim 13, wherein the backhaul signal comprises an R-PDSCH, and the R-PDSCH is transmitted only in the second slot.
20. The method of claim 11, further comprising:
transmitting an access signal to a relay user equipment in the subframe,
wherein OFDM symbols used for transmission of the access signal and OFDM symbols used for the reception of the backhaul signal are time multiplexed.
21. A relay station for transmitting and receiving a signal in a wireless communication system, the relay station comprising:
a radio frequency unit configured to transmit and receive a radio signal; and
a processor coupled to the radio frequency unit,
wherein the processor configures a subframe, including a plurality of OFDM (orthogonal frequency division multiplexing) symbols in a time domain, as an MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframe, and receives a backhaul signal from a base station in the subframe,
wherein OFDM symbols used for the reception of the backhaul signal start from a second OFDM symbol, a third OFDM symbol, or a fourth OFDM symbol of the subframe.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A magnetic resonance fluoroscopic imaging apparatus, comprising:
a static magnetic field generator which generates a static magnetic field;
a radio frequency magnetic field generator which generates a radio frequency magnetic field to excite nuclei in a plurality of slices of a subject placed within the static magnetic field;
a gradient magnetic field generator which generates a slice direction gradient magnetic field, a phase encoding gradient magnetic field and a frequency encoding gradient magnetic field;
a signal detector which detects nuclear magnetic resonance signals emitted from the nuclei;
a signal processor which reconstructs images of the plurality of slices from the nuclear magnetic resonance signals;
a display which displays the images; and
a controller which controls the radio frequency magnetic field generator, the gradient magnetic field generator and the signal processor, the controller performing an imaging process to sequentially image the plurality of slices by exciting the nuclei, by detecting the nuclear magnetic resonance signals and by reconstructing images of the plurality of slices, the controller successively repeating the imaging process to acquire a plurality of successive images of each of the plurality of slices, the controller successively displaying, on the display, sets of the images of the plurality of slices substantially simultaneously acquired.
2. The magnetic resonance fluoroscopic imaging apparatus as defined in claim 1, wherein the display comprises an image display device, the image display device displaying an image, a quality of the image showing no noticeable degradation when the image display device is arranged near the static magnetic field generator.
3. The magnetic resonance fluoroscopic imaging apparatus as defined in claim 2, wherein the image display device comprises a liquid crystal display.
4. The magnetic resonance fluoroscopic imaging apparatus as defined in claim 1, wherein at least one of the plurality of slices includes a position of an insertion to be inserted into the subject and is parallel with an intended advancing direction of the insertion.
5. The magnetic resonance fluoroscopic imaging apparatus as defined in claim 1, wherein at least one of the plurality of slices includes a position of an insertion inserted in the subject; and
the plurality of slices are parallel with an intended advancing direction of the insertion.
6. The magnetic resonance fluoroscopic imaging apparatus as defined in claim 1, wherein at least one of the plurality of slices includes a position of an insertion inserted in the subject and is parallel with an intended advancing direction of the insertion; and
another of the plurality of slices intersects the at least one of the plurality of slices.
7. The magnetic resonance fluoroscopic imaging apparatus as defined in claim 1, wherein two of the plurality of slices form a stereoscopic pair.
8. A magnetic resonance fluoroscopic imaging method, comprising sequential steps of:
(a) placing a subject in a static magnetic field;
(b) applying a slice direction gradient magnetic field and a radio frequency magnetic field to the subject to excite nuclei in one of a plurality of slices of the subject;
(c) applying a phase encoding gradient magnetic field to phase-encode the nuclei excited in the step (b);
(d) applying a frequency encoding gradient magnetic field and detecting nuclear magnetic resonance signals emitted from the nuclei;
(e) repeating the steps (b)-(d) until the nuclear magnetic resonance signals required for imaging the plurality of slices are acquired;
(f) reconstructing images of the plurality of slices from the nuclear magnetic resonance signals acquired in the step (e);
(g) simultaneously displaying, on a display, the images of the plurality of slices reconstructed in the step (f); and
(h) repeating the steps (e)-(g) a plurality of times successively.
9. The magnetic resonance fluoroscopic imaging method as defined in claim 8, wherein the step (e) is performed within a predetermined repetition time.
10. The magnetic resonance fluoroscopic imaging method as defined in claim 8, wherein at least one of the plurality of slices includes a position of an insertion inserted in the subject.
11. The magnetic resonance fluoroscopic imaging method as defined in claim 8, wherein at least one of the plurality of slices includes a position of an insertion inserted in the subject; and
the plurality of slices are parallel with an intended advancing direction of the insertion.
12. The magnetic resonance fluoroscopic imaging method as defined in claim 8, wherein at least one of the plurality of slices includes a position of an insertion inserted in the subject and is parallel with an intended advancing direction of the insertion; and
another of the plurality of slices intersects the at least one of the plurality of slices.
13. The magnetic resonance fluoroscopic imaging method as defined in claim 8, wherein two of the plurality of slices form a stereoscopic pair.
14. A magnetic resonance fluoroscopic imaging method, comprising sequential steps of:
(a) placing a subject in a static magnetic field;
(b) applying a slice direction gradient magnetic field and a radio frequency magnetic field to the subject to excite nuclei in one of a plurality of slices of the subject parallel with an intended advancing direction of an insertion inserted in the subject;
(c) applying a phase encoding gradient magnetic field to phase-encode the nuclei excited in the step (b);
(d) applying a frequency encoding gradient magnetic field and detecting nuclear magnetic resonance signals emitted from the nuclei;
(e) repeating the steps (b)-(d) until the nuclear magnetic resonance signals required for imaging the plurality of slices are acquired;
(f) reconstructing images of the plurality of slices from the nuclear magnetic resonance signals acquired in the step (e);
(g) simultaneously display, on a display, the images of the plurality of slices reconstructed in the step (f); and
(h) repeating the steps (e)-(g) a plurality of times successively.
15. The magnetic resonance fluoroscopic imaging method as defined in claim 14, wherein the step (e) is performed within a predetermined repetition time.