Expansion of Sensitivity Area for Magnetic Resonance Imaging of the Hand Using Parallel-array Coil
It is difficult for Rheumatoid Arthritis (RA) patients to remain in a strenuous position for a long time during examinations. The field of view (FOV): 250 mm is needed for hand examinations from the wrist to the finger. Two channel phased array coils are effective to use when examinations of the �...
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| Veröffentlicht in: | Japanese Journal of Radiological Technology 2012/10/20, Vol.68(10), pp.1346-1353 |
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| container_title | Japanese Journal of Radiological Technology |
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| creator | Takatsu, Yasuo Yamamura, Kenichirou Miyati, Tosiaki Kimura, Tetsuya Ueyama, Tsuyoshi Ishikuro, Akihiro |
| description | It is difficult for Rheumatoid Arthritis (RA) patients to remain in a strenuous position for a long time during examinations. The field of view (FOV): 250 mm is needed for hand examinations from the wrist to the finger. Two channel phased array coils are effective to use when examinations of the 'off center' are taken for the upper and lower extremities. The area of the array coils' sensitivity can be expanded by shifting both coil elements 40-60% in the opposite direction of the element's diameter. This method is given credibility due to the increased signal-to-noise ratio (SNR) in the peripheral regions (shifted directions), but loses value in the central area, as indicated by the decrease in SNR. This was confirmed in the image of the hand using visual assessment including the fat suppression technique. It was verified that the sensitivity area was expanded using Scheffe's method of paired comparison (Ura's modified method). An application at the other regions of the body can be expected to be used in the case of using parallel positioned coils during clinical situation. |
| doi_str_mv | 10.6009/jjrt.2012_JSRT_68.10.1346 |
| format | Article |
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The field of view (FOV): 250 mm is needed for hand examinations from the wrist to the finger. Two channel phased array coils are effective to use when examinations of the 'off center' are taken for the upper and lower extremities. The area of the array coils' sensitivity can be expanded by shifting both coil elements 40-60% in the opposite direction of the element's diameter. This method is given credibility due to the increased signal-to-noise ratio (SNR) in the peripheral regions (shifted directions), but loses value in the central area, as indicated by the decrease in SNR. This was confirmed in the image of the hand using visual assessment including the fat suppression technique. It was verified that the sensitivity area was expanded using Scheffe's method of paired comparison (Ura's modified method). An application at the other regions of the body can be expected to be used in the case of using parallel positioned coils during clinical situation.</description><identifier>ISSN: 0369-4305</identifier><identifier>EISSN: 1881-4883</identifier><identifier>DOI: 10.6009/jjrt.2012_JSRT_68.10.1346</identifier><identifier>PMID: 23089837</identifier><language>eng ; jpn</language><publisher>Japan: Japanese Society of Radiological Technology</publisher><subject>Adult ; Arrays ; Assessments ; Channels ; Coiling ; fat suppression ; Fingers ; Hand ; Humans ; magnetic resonance imaging (MRI) ; Magnetic Resonance Imaging - methods ; Male ; parallel-array coil ; Phantoms, Imaging ; positional dependence ; sensitivity distribution ; Signal to noise ratio ; Visual</subject><ispartof>Japanese Journal of Radiological Technology, 2012/10/20, Vol.68(10), pp.1346-1353</ispartof><rights>2012 Japanese Society of Radiological Technology</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c3666-9ab5bbba05bdc0da0297eb837a2df8054031621a529e5aff757413e662ea3f433</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,4010,27900,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23089837$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Takatsu, Yasuo</creatorcontrib><creatorcontrib>Yamamura, Kenichirou</creatorcontrib><creatorcontrib>Miyati, Tosiaki</creatorcontrib><creatorcontrib>Kimura, Tetsuya</creatorcontrib><creatorcontrib>Ueyama, Tsuyoshi</creatorcontrib><creatorcontrib>Ishikuro, Akihiro</creatorcontrib><title>Expansion of Sensitivity Area for Magnetic Resonance Imaging of the Hand Using Parallel-array Coil</title><title>Japanese Journal of Radiological Technology</title><addtitle>Jpn. J. Radiol. Technol.</addtitle><description>It is difficult for Rheumatoid Arthritis (RA) patients to remain in a strenuous position for a long time during examinations. The field of view (FOV): 250 mm is needed for hand examinations from the wrist to the finger. Two channel phased array coils are effective to use when examinations of the 'off center' are taken for the upper and lower extremities. The area of the array coils' sensitivity can be expanded by shifting both coil elements 40-60% in the opposite direction of the element's diameter. This method is given credibility due to the increased signal-to-noise ratio (SNR) in the peripheral regions (shifted directions), but loses value in the central area, as indicated by the decrease in SNR. This was confirmed in the image of the hand using visual assessment including the fat suppression technique. It was verified that the sensitivity area was expanded using Scheffe's method of paired comparison (Ura's modified method). An application at the other regions of the body can be expected to be used in the case of using parallel positioned coils during clinical situation.</description><subject>Adult</subject><subject>Arrays</subject><subject>Assessments</subject><subject>Channels</subject><subject>Coiling</subject><subject>fat suppression</subject><subject>Fingers</subject><subject>Hand</subject><subject>Humans</subject><subject>magnetic resonance imaging (MRI)</subject><subject>Magnetic Resonance Imaging - methods</subject><subject>Male</subject><subject>parallel-array coil</subject><subject>Phantoms, Imaging</subject><subject>positional dependence</subject><subject>sensitivity distribution</subject><subject>Signal to noise ratio</subject><subject>Visual</subject><issn>0369-4305</issn><issn>1881-4883</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkU1r3DAQhkVpaZY0f6Got1680YclS8ewpE1KSkM-zmJkjzdavPZW8obuv6-Mk6WHQi6SmHneGcFDyBfOlpoxe77ZxHEpGBfux_3dg9NmmTtclvodWXBjeFEaI9-TBZPaFqVk6oScpRQ8y-FcYuVHciIkM9bIakH85Z8d9CkMPR1aeo_5OYbnMB7oRUSg7RDpT1j3OIaa3mEaeuhrpNdbWId-PUXGJ6RX0Df0MU2VW4jQddgVECMc6GoI3SfyoYUu4dnLfUoev10-rK6Km1_fr1cXN0UttdaFBa-898CUb2rWABO2Qp8_CaJpDVMlk1wLDkpYVNC2lapKLlFrgSDbUspT8nWeu4vD7z2m0W1DqrHroMdhnxzXFVdCcKXfRoVRzJrK2LdRzkurWGlYRu2M1nFIKWLrdjFsIR4cZ25y5yZ37l93U2dyl7OfX9bs_RabY_LVVAZuZ2CTRljjEYCY1XQ4j54H5vN_O45o_QTRYS__ArqOshw</recordid><startdate>2012</startdate><enddate>2012</enddate><creator>Takatsu, Yasuo</creator><creator>Yamamura, Kenichirou</creator><creator>Miyati, Tosiaki</creator><creator>Kimura, Tetsuya</creator><creator>Ueyama, Tsuyoshi</creator><creator>Ishikuro, Akihiro</creator><general>Japanese Society of Radiological Technology</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7QO</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope><scope>7SC</scope><scope>7U5</scope><scope>JQ2</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope></search><sort><creationdate>2012</creationdate><title>Expansion of Sensitivity Area for Magnetic Resonance Imaging of the Hand Using Parallel-array Coil</title><author>Takatsu, Yasuo ; Yamamura, Kenichirou ; Miyati, Tosiaki ; Kimura, Tetsuya ; Ueyama, Tsuyoshi ; Ishikuro, Akihiro</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3666-9ab5bbba05bdc0da0297eb837a2df8054031621a529e5aff757413e662ea3f433</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng ; jpn</language><creationdate>2012</creationdate><topic>Adult</topic><topic>Arrays</topic><topic>Assessments</topic><topic>Channels</topic><topic>Coiling</topic><topic>fat suppression</topic><topic>Fingers</topic><topic>Hand</topic><topic>Humans</topic><topic>magnetic resonance imaging (MRI)</topic><topic>Magnetic Resonance Imaging - methods</topic><topic>Male</topic><topic>parallel-array coil</topic><topic>Phantoms, Imaging</topic><topic>positional dependence</topic><topic>sensitivity distribution</topic><topic>Signal to noise ratio</topic><topic>Visual</topic><toplevel>online_resources</toplevel><creatorcontrib>Takatsu, Yasuo</creatorcontrib><creatorcontrib>Yamamura, Kenichirou</creatorcontrib><creatorcontrib>Miyati, Tosiaki</creatorcontrib><creatorcontrib>Kimura, Tetsuya</creatorcontrib><creatorcontrib>Ueyama, Tsuyoshi</creatorcontrib><creatorcontrib>Ishikuro, Akihiro</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Biotechnology Research Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Computer and Information Systems Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>ProQuest Computer Science Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><jtitle>Japanese Journal of Radiological Technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Takatsu, Yasuo</au><au>Yamamura, Kenichirou</au><au>Miyati, Tosiaki</au><au>Kimura, Tetsuya</au><au>Ueyama, Tsuyoshi</au><au>Ishikuro, Akihiro</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Expansion of Sensitivity Area for Magnetic Resonance Imaging of the Hand Using Parallel-array Coil</atitle><jtitle>Japanese Journal of Radiological Technology</jtitle><addtitle>Jpn. J. Radiol. Technol.</addtitle><date>2012</date><risdate>2012</risdate><volume>68</volume><issue>10</issue><spage>1346</spage><epage>1353</epage><pages>1346-1353</pages><issn>0369-4305</issn><eissn>1881-4883</eissn><abstract>It is difficult for Rheumatoid Arthritis (RA) patients to remain in a strenuous position for a long time during examinations. The field of view (FOV): 250 mm is needed for hand examinations from the wrist to the finger. Two channel phased array coils are effective to use when examinations of the 'off center' are taken for the upper and lower extremities. The area of the array coils' sensitivity can be expanded by shifting both coil elements 40-60% in the opposite direction of the element's diameter. This method is given credibility due to the increased signal-to-noise ratio (SNR) in the peripheral regions (shifted directions), but loses value in the central area, as indicated by the decrease in SNR. 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| subjects | Adult Arrays Assessments Channels Coiling fat suppression Fingers Hand Humans magnetic resonance imaging (MRI) Magnetic Resonance Imaging - methods Male parallel-array coil Phantoms, Imaging positional dependence sensitivity distribution Signal to noise ratio Visual |
| title | Expansion of Sensitivity Area for Magnetic Resonance Imaging of the Hand Using Parallel-array Coil |
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