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Magnetic resonance imaging apparatus and image processing apparatus

Foreign code F200010127
File No. 4299
Posted date May 18, 2020
Country United States of America
Application number 201816209531
Gazette No. 20190107594
Date of filing Dec 4, 2018
Gazette Date Apr 11, 2019
Priority data
  • P2013-170529 (Aug 20, 2013) JP
  • 201414463023 (Aug 19, 2014) US
Title Magnetic resonance imaging apparatus and image processing apparatus
Abstract A magnetic resonance imaging apparatus according to an embodiment includes a sequence controller and a storage unit. The sequence controller acquires magnetic resonance signals of a target imaging part including cerebrospinal fluid flowing therein of a subject in a condition where a supply of oxygen is receivable, at a plurality of time phases in an oxygen inhalation process of the subject. The storage unit stores therein the magnetic resonance signals acquired at the time phases.
Outline of related art and contending technology BACKGROUND
Magnetic resonance imaging (MRI) is an imaging method by which a nuclear spin in a subject placed in a magnetostatic field is magnetically excited with a radio frequency (RF) pulse at a Larmor frequency so that an image is generated from magnetic resonance signals generated due to the excitation.
In the field of magnetic resonance imaging, contrast enhancement by oxygen has been known. For example, an imaging method called the fluid attenuated inversion recovery (FLAIR) method has been known in which the time period between when an inversion pulse is applied and when the longitudinal magnetic component of cerebrospinal fluid (CSF) becomes zero is set as an inversion time (TI). It has been reported that the contrast of CSF changes when imaging is performed by the FLAIR method while oxygen is supplied.
Scope of claims [claim1]
1. An image processing apparatus comprising:
an analyzing unit that extracts a cerebrospinal fluid (CSF) region from a magnetic resonance (MR) image; and
an input unit that receives an input to specify a cerebral ventricle portion region on the MR image from which the CSF region is extracted,
wherein the analyzing unit further extracts a cerebral sulcus portion region based on the specified cerebral ventricle portion region.

[claim2]
2. The image processing apparatus according to claim 1, wherein the input unit receives an input to specify a region of interest (ROI) that encompasses the cerebral ventricle portion region.

[claim3]
3. The image processing apparatus according to claim 1, wherein the analyzing unit generates a mask of the cerebral sulcus portion region by using the CSF region and the specified cerebral ventricle portion region.

[claim4]
4. The image processing apparatus according to claim 3, wherein the analyzing unit generates the mask of the cerebral sulcus portion region by subtracting a mask of the cerebral ventricle portion region from the CSF region.

[claim5]
5. The image processing apparatus according to claim 4, wherein the analyzing unit applies the mask of the cerebral sulcus portion region and the mask of the cerebral ventricle portion region to the MR image, and extracts signal values of the cerebral sulcus portion region and the cerebral ventricle portion region.

[claim6]
6. An image processing apparatus comprising:
an analyzing unit that extracts a cerebrospinal fluid (CSF) region from a magnetic resonance (MR) image; and
an identifying unit that identifies a cerebral ventricle portion region on the MR image from which the CSF region is extracted,
wherein the analyzing unit further extracts a cerebral sulcus portion region based on the identified cerebral ventricle portion region.

[claim7]
7. An image processing method comprising:
extracting a cerebrospinal fluid (CSF) region from a magnetic resonance (MR) image;
receiving an input to specify a cerebral ventricle portion region on the MR image from which the CSF region is extracted; and
extracting a cerebral sulcus portion region based on the specified cerebral ventricle portion region.

[claim8]
8. An image processing method comprising:
extracting a cerebrospinal fluid (CSF) region from a magnetic resonance (MR) image;
identifying a cerebral ventricle portion region on the MR image from which the CSF region is extracted; and
extracting a cerebral sulcus portion region based on the identified cerebral ventricle portion region.
  • Inventor, and Inventor/Applicant
  • FUSHIMI Yasutaka
  • SAKASHITA Naotaka
  • KYOTO UNIVERSITY
  • CANON MEDICAL SYSTEMS CORPORATION
IPC(International Patent Classification)
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