Joint estimation of attenuation and activity information using emission data
US-2015065854-A1 · Mar 5, 2015 · US
Method for generating image for PET attenuation correction from MR image and computer program
US9342903B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9342903-B2 |
| Application number | US-201314385683-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 28, 2013 |
| Priority date | Mar 28, 2012 |
| Publication date | May 17, 2016 |
| Grant date | May 17, 2016 |
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Abstract
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When an image for PET attenuation correction is generated from an MR image, the MR image captured by MRI is segmented into regions according to pixel values. In a region in which a radiation attenuation coefficient is considered to be uniform, a radiation attenuation correction value is determined by referring to an existing radiation attenuation correction value table. In a region including multiple tissues having different radiation attenuation coefficients, a radiation attenuation correction value is determined by referring to a standard image. In such a manner, an image for PET attenuation correction in which tissues having similar pixel values in the MR image but different attenuation coefficients for radiation can be distinguished and that can accommodate individual differences and an affected area such as a space occupying lesion (for example, a cancer, abscess, or the like) and an organic defect is generated.
First claim
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The invention claimed is: 1. A method for generating an image for PET attenuation correction from an MR image, comprising: segmenting an MR image captured by MRI into regions according to pixel values, determining a radiation attenuation correction value in a region in which a radiation attenuation coefficient is considered to be uniform by referring to an existing radiation attenuation correction value table, and determining a radiation attenuation correction value in a region including multiple tissues having different radiation attenuation coefficients by referring to a standard image. 2. The method for generating an image for PET attenuation correction from an MR image according to claim 1 , wherein the standard image is deformed to an MR image of a subject when the standard image is referred to. 3. The method for generating an image for PET attenuation correction from an MR image according to claim 2 , wherein the standard image is referred to by using an image of whole body tissue or an image of some tissues of the body tissue. 4. The method for generating an image for PET attenuation correction from an MR image according to claim 1 , wherein the standard image is an image for PET attenuation correction, a CT image, or a UTE image. 5. The method for generating an image for PET attenuation correction from an MR image according to claim 1 , wherein the MR image and the standard image are adjusted to each other in resolution. 6. The method for generating an image for PET attenuation correction from an MR image according to claim 1 , wherein at least either one of the radiation attenuation correction value table and the standard image is modified according to personal information about the subject. 7. The method for generating an image for PET attenuation correction from an MR image according to claim 1 , wherein subject's own radiation attenuation correction values or the image for PET attenuation correction, or the CT image or the UTE image is repeatedly used as at least either one of the radiation attenuation correction value table and the standard image. 8. A non-transitory computer readable medium storing a program for causing a computer to execute the method as set forth in claim 1 .
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Classifications
involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging · CPC title
Positron emission tomography [PET] · CPC title
Magnetic resonance imaging [MRI] · CPC title
with a combination of at least two different types of detectors · CPC title
adapted for acquisition of images from more than one imaging mode, e.g. combining MRI and optical tomography · CPC title
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- What does patent US9342903B2 cover?
- When an image for PET attenuation correction is generated from an MR image, the MR image captured by MRI is segmented into regions according to pixel values. In a region in which a radiation attenuation coefficient is considered to be uniform, a radiation attenuation correction value is determined by referring to an existing radiation attenuation correction value table. In a region including mu…
- Who is the assignee on this patent?
- Nat Inst Radiolog, Shimadzu Corp, Nat Inst Of Radiological Services
- What technology area does this patent fall under?
- Primary CPC classification G06T12/10. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 17 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).