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MRI apparatus provided with RF coils for forming images while utilizing sub-sampling

A technology of sub-sampling and equipment, applied in the field of MRI equipment

Inactive Publication Date: 2007-01-10
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The RF receive coils in the MRI apparatus described in the cited publication in "Proceeding SMRM 1991" lie substantially in the same plane, so the above requirement regarding a small degree of interdependence is not fulfilled

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  • MRI apparatus provided with RF coils for forming images while utilizing sub-sampling
  • MRI apparatus provided with RF coils for forming images while utilizing sub-sampling
  • MRI apparatus provided with RF coils for forming images while utilizing sub-sampling

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Embodiment Construction

[0032] as in figure 1 The magnetic resonance imaging apparatus schematically shown in includes means for generating a uniform magnetic field within the imaging volume of the MRI apparatus; such means consist of means for generating a stable magnetic field B 0 The first magnet system 1 and the power supply 4 for the first magnet system 1 are formed. It also includes a second magnet system 2 (gradient coil system) for generating the magnetic gradient field and a power amplifier 3 for the gradient coil system 2 . A radio frequency (RF) coil 5 is used to generate an RF magnetic alternating field; for this it is connected to an RF transmitter device with an RF source 6 . The RF coil 5 can also be used to detect spin resonance signals generated by the RF transmit field in the object to be examined (not shown); in this case, the RF coil is connected to an RF receiving device comprising a signal amplifier 7, and Separation circuitry 8 is also provided for separating forward and retu...

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PUM

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Abstract

The acquisition of MR images while utilizing sub-sampling of the RF signals generated in the patient (21) to be examined is known. Such sub-sampling methods require at least two RF receiving coils which should not have a substantial component of their sensitivity vectors in common. According to the invention at least two coils (22a, 22b) are used, a first one (22a) having its sensitivity vector extending substantially transversely of its physical coil plane whereas a second one (22b) has its sensitivity vector extending substantially parallel to its physical coil plane. The coils can thus be placed close to the surface of the patient without interfering with each other. They can be arranged in such a manner that their planes are oriented parallel to the main magnetic field Bo. Moreover, the coils can be arranged so as to overlap substantially, so that they provide the same field of view.

Description

technical field [0001] The present invention relates to an MRI device for forming an MR image of a patient to be examined in an imaging volume (volume) of the MRI device, the device being provided with: [0002] means for generating a homogeneous magnetic field in an imaging volume of an MRI apparatus, [0003] a patient support having a longitudinal axis extending in the direction of said uniform magnetic field, [0004] At least two RF receive coils for receiving RF signals originating from the subject, a first of the RF receive coils having a sensitivity vector directed transverse to the physical plane of the first coil. Background technique [0005] A device of the kind proposed is known from the publication entitled "Fast Imaging Method Using Multiple Receiver Coils with Subencoding Data Set", "Proceedings SMRM 1991", p.1240. The cited publication describes an imaging method using magnetic resonance and in which two RF receive coils are used as receive antennas. This...

Claims

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Application Information

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IPC IPC(8): G01R33/341G01R33/34A61B5/055G01R33/3415G01R33/561
CPCG01R33/5611G01R33/3415G01R33/3678G01R33/561
Inventor H·M·M·克里梅斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV