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Black blood mri using a stimulated echo pulse sequence with flow sensitization gradients

A technique of sensitizing gradients and sequences, used in the measurement of magnetic variables, instruments, measuring devices, etc.

Active Publication Date: 2014-01-08
KONINKLJIJKE PHILIPS NV +1
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  • Description
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Problems solved by technology

The situation is even more challenging when using DIR pulses (typically >500ms long) and / or multi-slice fast spin echo (TSE) acquisitions (time gaps much longer than 300ms here)

Method used

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  • Black blood mri using a stimulated echo pulse sequence with flow sensitization gradients
  • Black blood mri using a stimulated echo pulse sequence with flow sensitization gradients
  • Black blood mri using a stimulated echo pulse sequence with flow sensitization gradients

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Embodiment Construction

[0018] Disclosed herein are techniques for black blood magnetic resonance angiography (BB-MRA), collectively referred to as local excited black blood imaging (LOBBI) techniques. The LOBBI technique does not require global radio frequency (RF) excitation and allows efficient black blood imaging when locally excited T / R coils are used, providing black blood targeting of blood originating both inside and outside the imaging plane / slice contrast. Thus, LOBBI sequences can be performed using local excitation coils of relatively small area (eg, having a footprint of less than 20 centimeters in some embodiments, and less than 10 centimeters in some embodiments).

[0019] refer to figure 1 , the illustrative magnetic resonance angiography (MRA) system includes an MR scanner 10 operated by a magnetic resonance (MR) control module 12 to retrieve a LOBBI sequence from a sequence memory 14 and execute the retrieved LOBBI sequence to perform a Black blood imaging of subjects (eg, human s...

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Abstract

A black blood magnetic resonance imaging sequence is performed using a magnetic resonance scanner. The sequence includes: applying a first flow sensitization gradient; applying a spoiler gradient after applying the first flow sensitization gradient; applying a second flow sensitization gradient after applying the spoiler gradient wherein the second flow sensitization gradient has area equal to the first flow sensitization gradient but of opposite polarity; applying a slice-selective radio frequency excitation pulse after applying the spoiler gradient; and performing a magnetic resonance readout after applying the second flow sensitization gradient and after applying the slice selective radio frequency excitation. The readout acquires magnetic resonance imaging data having blood signal suppression in the region excited by the slice-selective radio frequency excitation pulse. The magnetic resonance imaging data is suitably reconstructed to generate a black blood image that may be displayed.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 60 / 477833, filed April 21, 2011, entitled "Local excitation Black Blood Imaging (LOBBI)." technical field [0003] The following relates to the field of magnetic resonance, the field of magnetic resonance imaging, the field of magnetic resonance angiography, and to applications of these, eg medical imaging, veterinary imaging, etc. Background technique [0004] Black blood (BB) magnetic resonance angiography (MRA) is a type of magnetic resonance imaging (MRI) that enables the visualization and quantification of atherosclerotic plaque size / composition. The two BB technologies are Double Inversion Recovery (DIR) and Sports Sensitized Drive Balance (MSDE). Both DIR and MSDE employ non-selective spin excitation (or manipulation) to achieve hemoinhibition. In the case of local excitation, the black blood effect will be greatly reduced or eliminated beca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/563
CPCG01R33/56316G01R33/5635G01R33/30
Inventor J·王P·博尔纳特C·袁
Owner KONINKLJIJKE PHILIPS NV
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