A New Method for Attenuation Coefficient Measurement in the Liver: Comparison With the Spectral Shift Central Frequency Method
To assess the feasibility of a new method of measuring the attenuation coefficient in the liver, which offers less variability of results than the conventional method. The attenuation coefficient was evaluated on the basis of the following equation with sound field correction: [log(M0 (z)) - tau(z)]...
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| Veröffentlicht in: | Journal of ultrasound in medicine 2002-07, Vol.21 (7), p.783-788 |
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| container_title | Journal of ultrasound in medicine |
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| creator | Fujii, Yasutomo Taniguchi, Nobuyuki Itoh, Kouichi Shigeta, Kouichiro Wang, Yi Tsao, Jing-Wen Kumasaki, Kenji Itoh, Takashi |
| description | To assess the feasibility of a new method of measuring the attenuation coefficient in the liver, which offers less variability of results than the conventional method.
The attenuation coefficient was evaluated on the basis of the following equation with sound field correction: [log(M0 (z)) - tau(z)]. In our system, the attenuation coefficient was also evaluated by the spectral shift central frequency method at the same time. We used 44 cases of normal liver, 40 cases of fatty liver, and 20 cases of cirrhotic liver in the system.
With this new method, attenuation coefficient values were 0.59+/-0.10 dB x cm(-1) x MHz(-1) in normal livers, 0.80+/-0.12 dB x cm(-1) x MHz(-1) in fatty livers, and 0.62+/-0.09 dB x cm(-1) x MHz(-1) in cirrhotic livers. In both methods we recorded a statistically significant difference between normal and fatty livers and between fatty and cirrhotic livers (P < .0001). Only in the fatty liver was any significant difference (P < .0001) found between attenuation coefficients in the new method and those in the spectral shift central frequency method (0.70+/-0.05 dB x cm(-1) x MHz(-1)).
This new method, which was more sensitive in detecting fatty infiltration than the spectral shift central frequency method, was considered usable for evaluating the attenuation coefficient of the liver in vivo. |
| doi_str_mv | 10.7863/jum.2002.21.7.783 |
| format | Article |
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The attenuation coefficient was evaluated on the basis of the following equation with sound field correction: [log(M0 (z)) - tau(z)]. In our system, the attenuation coefficient was also evaluated by the spectral shift central frequency method at the same time. We used 44 cases of normal liver, 40 cases of fatty liver, and 20 cases of cirrhotic liver in the system.
With this new method, attenuation coefficient values were 0.59+/-0.10 dB x cm(-1) x MHz(-1) in normal livers, 0.80+/-0.12 dB x cm(-1) x MHz(-1) in fatty livers, and 0.62+/-0.09 dB x cm(-1) x MHz(-1) in cirrhotic livers. In both methods we recorded a statistically significant difference between normal and fatty livers and between fatty and cirrhotic livers (P < .0001). Only in the fatty liver was any significant difference (P < .0001) found between attenuation coefficients in the new method and those in the spectral shift central frequency method (0.70+/-0.05 dB x cm(-1) x MHz(-1)).
This new method, which was more sensitive in detecting fatty infiltration than the spectral shift central frequency method, was considered usable for evaluating the attenuation coefficient of the liver in vivo.</description><identifier>ISSN: 0278-4297</identifier><identifier>EISSN: 1550-9613</identifier><identifier>DOI: 10.7863/jum.2002.21.7.783</identifier><identifier>PMID: 12099567</identifier><identifier>CODEN: JUMEDA</identifier><language>eng</language><publisher>Laurel, MD: Am inst Ulrrasound Med</publisher><subject>Adolescent ; Adult ; Aged ; Biological and medical sciences ; Digestive system. Abdomen ; Fatty Liver - diagnostic imaging ; Female ; Humans ; Investigative techniques, diagnostic techniques (general aspects) ; Liver - diagnostic imaging ; Liver Cirrhosis - diagnostic imaging ; Male ; Medical sciences ; Middle Aged ; Phantoms, Imaging ; Ultrasonic investigative techniques ; Ultrasonography</subject><ispartof>Journal of ultrasound in medicine, 2002-07, Vol.21 (7), p.783-788</ispartof><rights>2002 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c309t-8f07ef5f810af0ed41a47ce810555345de35a91a93e9a3688e025c5ea5ae1aef3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=13754958$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/12099567$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Fujii, Yasutomo</creatorcontrib><creatorcontrib>Taniguchi, Nobuyuki</creatorcontrib><creatorcontrib>Itoh, Kouichi</creatorcontrib><creatorcontrib>Shigeta, Kouichiro</creatorcontrib><creatorcontrib>Wang, Yi</creatorcontrib><creatorcontrib>Tsao, Jing-Wen</creatorcontrib><creatorcontrib>Kumasaki, Kenji</creatorcontrib><creatorcontrib>Itoh, Takashi</creatorcontrib><title>A New Method for Attenuation Coefficient Measurement in the Liver: Comparison With the Spectral Shift Central Frequency Method</title><title>Journal of ultrasound in medicine</title><addtitle>J Ultrasound Med</addtitle><description>To assess the feasibility of a new method of measuring the attenuation coefficient in the liver, which offers less variability of results than the conventional method.
The attenuation coefficient was evaluated on the basis of the following equation with sound field correction: [log(M0 (z)) - tau(z)]. In our system, the attenuation coefficient was also evaluated by the spectral shift central frequency method at the same time. We used 44 cases of normal liver, 40 cases of fatty liver, and 20 cases of cirrhotic liver in the system.
With this new method, attenuation coefficient values were 0.59+/-0.10 dB x cm(-1) x MHz(-1) in normal livers, 0.80+/-0.12 dB x cm(-1) x MHz(-1) in fatty livers, and 0.62+/-0.09 dB x cm(-1) x MHz(-1) in cirrhotic livers. In both methods we recorded a statistically significant difference between normal and fatty livers and between fatty and cirrhotic livers (P < .0001). Only in the fatty liver was any significant difference (P < .0001) found between attenuation coefficients in the new method and those in the spectral shift central frequency method (0.70+/-0.05 dB x cm(-1) x MHz(-1)).
This new method, which was more sensitive in detecting fatty infiltration than the spectral shift central frequency method, was considered usable for evaluating the attenuation coefficient of the liver in vivo.</description><subject>Adolescent</subject><subject>Adult</subject><subject>Aged</subject><subject>Biological and medical sciences</subject><subject>Digestive system. Abdomen</subject><subject>Fatty Liver - diagnostic imaging</subject><subject>Female</subject><subject>Humans</subject><subject>Investigative techniques, diagnostic techniques (general aspects)</subject><subject>Liver - diagnostic imaging</subject><subject>Liver Cirrhosis - diagnostic imaging</subject><subject>Male</subject><subject>Medical sciences</subject><subject>Middle Aged</subject><subject>Phantoms, Imaging</subject><subject>Ultrasonic investigative techniques</subject><subject>Ultrasonography</subject><issn>0278-4297</issn><issn>1550-9613</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkEtv1DAUhS1ERYfCD2CDsoFdpnYcxza70ailSANdtIildfFcE1d5DLZD1A2_HU8bMav78HfOtQ4h7xhdS9Xwy4epX1eUVuuKrWVe8RdkxYSgpW4Yf0lWtJKqrCstz8nrGB8ySZmsX5FzVlGtRSNX5O-m-IZz8RVTO-4LN4ZikxIOEyQ_DsV2ROe89TikjECcAvbH3g9FarHY-T8YPmWqP0DwMQt--NQ-Pd0d0KYAXXHXepeKbVYdp-uAvycc7ONy8Q05c9BFfLvUC_L9-up-e1Pubj9_2W52peVUp1I5KtEJpxgFR3FfM6ilxTwKIXgt9sgFaAaaowbeKIW0ElYgCEAG6PgF-fjsewhj_kBMpvfRYtfBgOMUjWRKNlyxDLJn0IYxxoDOHILvITwaRs0xdJNDN8fQTcWMzCueNe8X8-lnj_uTYkk5Ax8WAKKFzgUYrI8njktRa6FOXOt_tbMPaGIPXZdtmZnn-f_BfzBvmV4</recordid><startdate>20020701</startdate><enddate>20020701</enddate><creator>Fujii, Yasutomo</creator><creator>Taniguchi, Nobuyuki</creator><creator>Itoh, Kouichi</creator><creator>Shigeta, Kouichiro</creator><creator>Wang, Yi</creator><creator>Tsao, Jing-Wen</creator><creator>Kumasaki, Kenji</creator><creator>Itoh, Takashi</creator><general>Am inst Ulrrasound Med</general><general>American Institute of Ultrasound in Medicine</general><scope>IQODW</scope><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></search><sort><creationdate>20020701</creationdate><title>A New Method for Attenuation Coefficient Measurement in the Liver: Comparison With the Spectral Shift Central Frequency Method</title><author>Fujii, Yasutomo ; Taniguchi, Nobuyuki ; Itoh, Kouichi ; Shigeta, Kouichiro ; Wang, Yi ; Tsao, Jing-Wen ; Kumasaki, Kenji ; Itoh, Takashi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c309t-8f07ef5f810af0ed41a47ce810555345de35a91a93e9a3688e025c5ea5ae1aef3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Adolescent</topic><topic>Adult</topic><topic>Aged</topic><topic>Biological and medical sciences</topic><topic>Digestive system. Abdomen</topic><topic>Fatty Liver - diagnostic imaging</topic><topic>Female</topic><topic>Humans</topic><topic>Investigative techniques, diagnostic techniques (general aspects)</topic><topic>Liver - diagnostic imaging</topic><topic>Liver Cirrhosis - diagnostic imaging</topic><topic>Male</topic><topic>Medical sciences</topic><topic>Middle Aged</topic><topic>Phantoms, Imaging</topic><topic>Ultrasonic investigative techniques</topic><topic>Ultrasonography</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Fujii, Yasutomo</creatorcontrib><creatorcontrib>Taniguchi, Nobuyuki</creatorcontrib><creatorcontrib>Itoh, Kouichi</creatorcontrib><creatorcontrib>Shigeta, Kouichiro</creatorcontrib><creatorcontrib>Wang, Yi</creatorcontrib><creatorcontrib>Tsao, Jing-Wen</creatorcontrib><creatorcontrib>Kumasaki, Kenji</creatorcontrib><creatorcontrib>Itoh, Takashi</creatorcontrib><collection>Pascal-Francis</collection><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><jtitle>Journal of ultrasound in medicine</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Fujii, Yasutomo</au><au>Taniguchi, Nobuyuki</au><au>Itoh, Kouichi</au><au>Shigeta, Kouichiro</au><au>Wang, Yi</au><au>Tsao, Jing-Wen</au><au>Kumasaki, Kenji</au><au>Itoh, Takashi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A New Method for Attenuation Coefficient Measurement in the Liver: Comparison With the Spectral Shift Central Frequency Method</atitle><jtitle>Journal of ultrasound in medicine</jtitle><addtitle>J Ultrasound Med</addtitle><date>2002-07-01</date><risdate>2002</risdate><volume>21</volume><issue>7</issue><spage>783</spage><epage>788</epage><pages>783-788</pages><issn>0278-4297</issn><eissn>1550-9613</eissn><coden>JUMEDA</coden><abstract>To assess the feasibility of a new method of measuring the attenuation coefficient in the liver, which offers less variability of results than the conventional method.
The attenuation coefficient was evaluated on the basis of the following equation with sound field correction: [log(M0 (z)) - tau(z)]. In our system, the attenuation coefficient was also evaluated by the spectral shift central frequency method at the same time. We used 44 cases of normal liver, 40 cases of fatty liver, and 20 cases of cirrhotic liver in the system.
With this new method, attenuation coefficient values were 0.59+/-0.10 dB x cm(-1) x MHz(-1) in normal livers, 0.80+/-0.12 dB x cm(-1) x MHz(-1) in fatty livers, and 0.62+/-0.09 dB x cm(-1) x MHz(-1) in cirrhotic livers. In both methods we recorded a statistically significant difference between normal and fatty livers and between fatty and cirrhotic livers (P < .0001). Only in the fatty liver was any significant difference (P < .0001) found between attenuation coefficients in the new method and those in the spectral shift central frequency method (0.70+/-0.05 dB x cm(-1) x MHz(-1)).
This new method, which was more sensitive in detecting fatty infiltration than the spectral shift central frequency method, was considered usable for evaluating the attenuation coefficient of the liver in vivo.</abstract><cop>Laurel, MD</cop><pub>Am inst Ulrrasound Med</pub><pmid>12099567</pmid><doi>10.7863/jum.2002.21.7.783</doi><tpages>6</tpages></addata></record> |
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| subjects | Adolescent Adult Aged Biological and medical sciences Digestive system. Abdomen Fatty Liver - diagnostic imaging Female Humans Investigative techniques, diagnostic techniques (general aspects) Liver - diagnostic imaging Liver Cirrhosis - diagnostic imaging Male Medical sciences Middle Aged Phantoms, Imaging Ultrasonic investigative techniques Ultrasonography |
| title | A New Method for Attenuation Coefficient Measurement in the Liver: Comparison With the Spectral Shift Central Frequency Method |
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