Manual adjustment of tube voltage from 120 to 100 kVp during abdominal CT in patients with body weights ≤75 kg: assessment of image quality and radiation dose in a prospective, randomised trial

Aim To assess image quality and radiation dose in patients with body weights ≤75 kg undergoing abdominal computed tomography (CT) with a tube voltage of either 120 or 100 kVp. Materials and methods Eighty patients weighing ≤75 kg were prospectively assigned to receive either 120 or 100 kVp abdominal...

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Veröffentlicht in:Clinical radiology 2016-06, Vol.71 (6), p.615.e1-615.e6
Hauptverfasser: Zaehringer, C, Euler, A, Karwacki, G.M, Hohmann, J, Pansini, M, Szucs-Farkas, Z, Schindera, S.T
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container_end_page 615.e6
container_issue 6
container_start_page 615.e1
container_title Clinical radiology
container_volume 71
creator Zaehringer, C
Euler, A
Karwacki, G.M
Hohmann, J
Pansini, M
Szucs-Farkas, Z
Schindera, S.T
description Aim To assess image quality and radiation dose in patients with body weights ≤75 kg undergoing abdominal computed tomography (CT) with a tube voltage of either 120 or 100 kVp. Materials and methods Eighty patients weighing ≤75 kg were prospectively assigned to receive either 120 or 100 kVp abdominal CT in the portal-venous phase. Attenuation values of abdominal organs and image noise were measured, and the contrast-to-noise ratios (CNRs) were calculated. Subjective image quality was assessed by three independent radiologists. Radiation exposure was assessed by size-specific dose estimate (SSDE). Results The mean attenuation of the kidney increased by 20% at 100 kVp ( p< 0.0001), and the mean image noise was 27% higher in the 100 kVp ( p =0.003). The CNR did not significantly differ between the groups (120 kVp, 6.6±2.8; 100 kVp, 7.4±3.6; p =0.26). Except for subjective image noise ( p< 0.001), no other subjective quality parameters (e.g., contrast, artefacts) were significantly different between the two groups ( p between 0.094 and 0.761). The mean SSDE in the 100-kVp group (9.8±1.8 mGy) was reduced by 19% compared to the 120-kVp group (12.1±1.8 mGy; p< 0.0001). Conclusion Manual reduction of tube voltage from the standard 120 to 100 kVp for portal-venous phase CT in patients with body weights ≤75 kg resulted in a 19% dose reduction while maintaining objective and subjective image quality.
doi_str_mv 10.1016/j.crad.2016.02.014
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Materials and methods Eighty patients weighing ≤75 kg were prospectively assigned to receive either 120 or 100 kVp abdominal CT in the portal-venous phase. Attenuation values of abdominal organs and image noise were measured, and the contrast-to-noise ratios (CNRs) were calculated. Subjective image quality was assessed by three independent radiologists. Radiation exposure was assessed by size-specific dose estimate (SSDE). Results The mean attenuation of the kidney increased by 20% at 100 kVp ( p&lt; 0.0001), and the mean image noise was 27% higher in the 100 kVp ( p =0.003). The CNR did not significantly differ between the groups (120 kVp, 6.6±2.8; 100 kVp, 7.4±3.6; p =0.26). Except for subjective image noise ( p&lt; 0.001), no other subjective quality parameters (e.g., contrast, artefacts) were significantly different between the two groups ( p between 0.094 and 0.761). The mean SSDE in the 100-kVp group (9.8±1.8 mGy) was reduced by 19% compared to the 120-kVp group (12.1±1.8 mGy; p&lt; 0.0001). Conclusion Manual reduction of tube voltage from the standard 120 to 100 kVp for portal-venous phase CT in patients with body weights ≤75 kg resulted in a 19% dose reduction while maintaining objective and subjective image quality.</description><identifier>ISSN: 0009-9260</identifier><identifier>EISSN: 1365-229X</identifier><identifier>DOI: 10.1016/j.crad.2016.02.014</identifier><identifier>PMID: 27005016</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Body Weight ; Female ; Humans ; Male ; Middle Aged ; Multidetector Computed Tomography - methods ; Prospective Studies ; Radiation Dosage ; Radiation Protection - methods ; Radiographic Image Interpretation, Computer-Assisted - methods ; Radiography, Abdominal - methods ; Radiology ; Radiometry - methods ; Reproducibility of Results ; Sensitivity and Specificity</subject><ispartof>Clinical radiology, 2016-06, Vol.71 (6), p.615.e1-615.e6</ispartof><rights>The Royal College of Radiologists</rights><rights>2016 The Royal College of Radiologists</rights><rights>Copyright © 2016 The Royal College of Radiologists. Published by Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c326t-b92e7a85adde0f06d378ec95eed3df94947d0408fe6851daa520b24d78f670e03</citedby><cites>FETCH-LOGICAL-c326t-b92e7a85adde0f06d378ec95eed3df94947d0408fe6851daa520b24d78f670e03</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.crad.2016.02.014$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/27005016$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Zaehringer, C</creatorcontrib><creatorcontrib>Euler, A</creatorcontrib><creatorcontrib>Karwacki, G.M</creatorcontrib><creatorcontrib>Hohmann, J</creatorcontrib><creatorcontrib>Pansini, M</creatorcontrib><creatorcontrib>Szucs-Farkas, Z</creatorcontrib><creatorcontrib>Schindera, S.T</creatorcontrib><title>Manual adjustment of tube voltage from 120 to 100 kVp during abdominal CT in patients with body weights ≤75 kg: assessment of image quality and radiation dose in a prospective, randomised trial</title><title>Clinical radiology</title><addtitle>Clin Radiol</addtitle><description>Aim To assess image quality and radiation dose in patients with body weights ≤75 kg undergoing abdominal computed tomography (CT) with a tube voltage of either 120 or 100 kVp. Materials and methods Eighty patients weighing ≤75 kg were prospectively assigned to receive either 120 or 100 kVp abdominal CT in the portal-venous phase. Attenuation values of abdominal organs and image noise were measured, and the contrast-to-noise ratios (CNRs) were calculated. Subjective image quality was assessed by three independent radiologists. Radiation exposure was assessed by size-specific dose estimate (SSDE). Results The mean attenuation of the kidney increased by 20% at 100 kVp ( p&lt; 0.0001), and the mean image noise was 27% higher in the 100 kVp ( p =0.003). The CNR did not significantly differ between the groups (120 kVp, 6.6±2.8; 100 kVp, 7.4±3.6; p =0.26). Except for subjective image noise ( p&lt; 0.001), no other subjective quality parameters (e.g., contrast, artefacts) were significantly different between the two groups ( p between 0.094 and 0.761). The mean SSDE in the 100-kVp group (9.8±1.8 mGy) was reduced by 19% compared to the 120-kVp group (12.1±1.8 mGy; p&lt; 0.0001). Conclusion Manual reduction of tube voltage from the standard 120 to 100 kVp for portal-venous phase CT in patients with body weights ≤75 kg resulted in a 19% dose reduction while maintaining objective and subjective image quality.</description><subject>Body Weight</subject><subject>Female</subject><subject>Humans</subject><subject>Male</subject><subject>Middle Aged</subject><subject>Multidetector Computed Tomography - methods</subject><subject>Prospective Studies</subject><subject>Radiation Dosage</subject><subject>Radiation Protection - methods</subject><subject>Radiographic Image Interpretation, Computer-Assisted - methods</subject><subject>Radiography, Abdominal - methods</subject><subject>Radiology</subject><subject>Radiometry - methods</subject><subject>Reproducibility of Results</subject><subject>Sensitivity and Specificity</subject><issn>0009-9260</issn><issn>1365-229X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9UkuOEzEQbSEQEwYuwALVkgUJZfcfoZFQxADSIBYMiJ3lbldnnHTaGdudUY4w9-Am3ISTUK3MsGDBymXrvVev6jlJngtcCBTF6_Wi9dosJNcLlAsU2YNkJtIin0tZ_3iYzBCxnteywJPkSQjr6ZrJ7HFyIkvEnGmz5NdnPYy6B23WY4hbGiK4DuLYEOxdH_WKoPNuC0IiRAcCETbfd2BGb4cV6Ma4rR2Yv7wEO8BOR8sSAW5svILGmQPckF1d8cvv259lDpvVG9AhUAj3rex26nHNHmw8gB4M8EyWddwAxgWaZDXsvAs7aqPd0ysGDFPbQAait7p_mjzqdB_o2d15mnw7f3-5_Di_-PLh0_LdxbxNZRHnTS2p1FWujSHssDBpWVFb50QmNV2d1VlpMMOqo6LKhdE6l9jIzJRVV5RImJ4mL4-67OZ6pBAVm2ip7_VAbgxKlFVeZiKtS4bKI7Rl48FTp3aeJ_UHJVBN4am1msJTU3gKpeLwmPTiTn9stmT-Uu7TYsDbI4B4yr0lr0LL-27JWM_LUcbZ_-uf_UNvezvYVvcbOlBYu9FzlDyHCkxQX6f_Mv0eUUwVVukf41_C_w</recordid><startdate>20160601</startdate><enddate>20160601</enddate><creator>Zaehringer, C</creator><creator>Euler, A</creator><creator>Karwacki, G.M</creator><creator>Hohmann, J</creator><creator>Pansini, M</creator><creator>Szucs-Farkas, Z</creator><creator>Schindera, S.T</creator><general>Elsevier Ltd</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></search><sort><creationdate>20160601</creationdate><title>Manual adjustment of tube voltage from 120 to 100 kVp during abdominal CT in patients with body weights ≤75 kg: assessment of image quality and radiation dose in a prospective, randomised trial</title><author>Zaehringer, C ; Euler, A ; Karwacki, G.M ; Hohmann, J ; Pansini, M ; Szucs-Farkas, Z ; Schindera, S.T</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c326t-b92e7a85adde0f06d378ec95eed3df94947d0408fe6851daa520b24d78f670e03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Body Weight</topic><topic>Female</topic><topic>Humans</topic><topic>Male</topic><topic>Middle Aged</topic><topic>Multidetector Computed Tomography - methods</topic><topic>Prospective Studies</topic><topic>Radiation Dosage</topic><topic>Radiation Protection - methods</topic><topic>Radiographic Image Interpretation, Computer-Assisted - methods</topic><topic>Radiography, Abdominal - methods</topic><topic>Radiology</topic><topic>Radiometry - methods</topic><topic>Reproducibility of Results</topic><topic>Sensitivity and Specificity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zaehringer, C</creatorcontrib><creatorcontrib>Euler, A</creatorcontrib><creatorcontrib>Karwacki, G.M</creatorcontrib><creatorcontrib>Hohmann, J</creatorcontrib><creatorcontrib>Pansini, M</creatorcontrib><creatorcontrib>Szucs-Farkas, Z</creatorcontrib><creatorcontrib>Schindera, S.T</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><jtitle>Clinical radiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zaehringer, C</au><au>Euler, A</au><au>Karwacki, G.M</au><au>Hohmann, J</au><au>Pansini, M</au><au>Szucs-Farkas, Z</au><au>Schindera, S.T</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Manual adjustment of tube voltage from 120 to 100 kVp during abdominal CT in patients with body weights ≤75 kg: assessment of image quality and radiation dose in a prospective, randomised trial</atitle><jtitle>Clinical radiology</jtitle><addtitle>Clin Radiol</addtitle><date>2016-06-01</date><risdate>2016</risdate><volume>71</volume><issue>6</issue><spage>615.e1</spage><epage>615.e6</epage><pages>615.e1-615.e6</pages><issn>0009-9260</issn><eissn>1365-229X</eissn><abstract>Aim To assess image quality and radiation dose in patients with body weights ≤75 kg undergoing abdominal computed tomography (CT) with a tube voltage of either 120 or 100 kVp. Materials and methods Eighty patients weighing ≤75 kg were prospectively assigned to receive either 120 or 100 kVp abdominal CT in the portal-venous phase. Attenuation values of abdominal organs and image noise were measured, and the contrast-to-noise ratios (CNRs) were calculated. Subjective image quality was assessed by three independent radiologists. Radiation exposure was assessed by size-specific dose estimate (SSDE). Results The mean attenuation of the kidney increased by 20% at 100 kVp ( p&lt; 0.0001), and the mean image noise was 27% higher in the 100 kVp ( p =0.003). The CNR did not significantly differ between the groups (120 kVp, 6.6±2.8; 100 kVp, 7.4±3.6; p =0.26). Except for subjective image noise ( p&lt; 0.001), no other subjective quality parameters (e.g., contrast, artefacts) were significantly different between the two groups ( p between 0.094 and 0.761). The mean SSDE in the 100-kVp group (9.8±1.8 mGy) was reduced by 19% compared to the 120-kVp group (12.1±1.8 mGy; p&lt; 0.0001). Conclusion Manual reduction of tube voltage from the standard 120 to 100 kVp for portal-venous phase CT in patients with body weights ≤75 kg resulted in a 19% dose reduction while maintaining objective and subjective image quality.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>27005016</pmid><doi>10.1016/j.crad.2016.02.014</doi></addata></record>
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subjects Body Weight
Female
Humans
Male
Middle Aged
Multidetector Computed Tomography - methods
Prospective Studies
Radiation Dosage
Radiation Protection - methods
Radiographic Image Interpretation, Computer-Assisted - methods
Radiography, Abdominal - methods
Radiology
Radiometry - methods
Reproducibility of Results
Sensitivity and Specificity
title Manual adjustment of tube voltage from 120 to 100 kVp during abdominal CT in patients with body weights ≤75 kg: assessment of image quality and radiation dose in a prospective, randomised trial
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