Abstract:
:Attenuation correction (AC) is an essential step in the positron emission tomography (PET) data reconstruction process to provide accurate and quantitative PET images. The introduction of PET/magnetic resonance (MR) hybrid systems has raised new challenges but also possibilities regarding PET AC. While in PET/computed tomography (CT) imaging, CT images can be converted to attenuation maps, MR images in PET/MR do not provide a direct relation to attenuation. For the AC of patient tissues, new methods have been suggested, for example, based on image segmentation, atlas registration, or ultrashort echo time MR sequences. Another challenge in PET/MR hybrid imaging is AC of hardware components that are placed in the PET/MR field of view, such as the patient table or various radiofrequency (RF) coils covering the body of the patient for MR signal detection. Hardware components can be categorized into 4 different groups: (1) patient table, (2) RF receiver coils, (3) radiation therapy equipment, and (4) PET and MR imaging phantoms. For rigid and stationary objects, such as the patient table and some RF coils like the head/neck coil, predefined CT-based attenuation maps stored on the system can be used for automatic AC. Flexible RF coils are not included into the AC process till now because they can vary in position as well as in shape and are not accurately detectable with the PET/MR system.This work summarizes challenges, established methods, new concepts, and the state of art in hardware component AC in the context of PET/MR hybrid imaging. The work also gives an overview of PET/MR hardware devices, their attenuation properties, and their effect on PET quantification.
journal_name
Invest Radioljournal_title
Investigative radiologyauthors
Paulus DH,Quick HHdoi
10.1097/RLI.0000000000000289subject
Has Abstractpub_date
2016-10-01 00:00:00pages
624-34issue
10eissn
0020-9996issn
1536-0210journal_volume
51pub_type
杂志文章,评审abstract::Thoracic metastases from squamous carcinoma and adenocarcinoma of the cervix were studied by reviewing 245 consecutive cases to describe comparative incidence, natural history, and radiographic patterns. The incidence of chest metastases was higher for adenocarcinoma (20%) than for squamous carcinoma (4%). Few patient...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198003000-00004
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journal_title:Investigative radiology
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journal_title:Investigative radiology
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199509000-00004
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pub_type: 杂志文章
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journal_title:Investigative radiology
pub_type: 杂志文章
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198903000-00012
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journal_title:Investigative radiology
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journal_title:Investigative radiology
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doi:10.1097/RLI.0b013e318032a9fe
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198005000-00013
更新日期:1980-05-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197703000-00009
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-200207000-00005
更新日期:2002-07-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198808000-00013
更新日期:1988-08-01 00:00:00
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journal_title:Investigative radiology
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1994-06-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199801000-00008
更新日期:1998-01-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000651
更新日期:2020-06-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199907000-00008
更新日期:1999-07-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199106000-00004
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pub_type: 杂志文章
doi:10.1097/01.rli.0000194070.88432.24
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doi:10.1097/00004424-198101000-00003
更新日期:1981-01-01 00:00:00
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journal_title:Investigative radiology
pub_type: 临床试验,杂志文章
doi:10.1097/00004424-199606000-00009
更新日期:1996-06-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
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更新日期:1991-03-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
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更新日期:1996-09-01 00:00:00
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journal_title:Investigative radiology
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更新日期:2020-09-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:
更新日期:2003-06-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To evaluate the attenuation, size, and volume of the pericardial sinuses and recesses by using electrocardiographically triggered, noncontrast-enhanced electron beam tomography (EBT) and to consider its relation with sex, age, and heart volume. METHODS:Findings in 213 consecutive patients with...
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更新日期:2000-06-01 00:00:00
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更新日期:1983-11-01 00:00:00
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更新日期:2007-04-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-200109000-00004
更新日期:2001-09-01 00:00:00