Automated attenuation-based tube voltage selection for body CTA: Performance evaluation of 192-slice dual-source CT.
Objective: To assess radiation dose and image quality in body CT-angiography (CTA) with automated attenuation-based tube voltage selection (ATVS) on a 192-slice dual-source CT (DSCT).Methods: Forty patients (69.5 ± 9.6 years) who had undergone body CTA with ATVS (ref.kVp 100, ref.mAs 90) using a 2x1...
| Published in: | European Radiology Vol. 25; no. 8; pp. 2346 - 2354 |
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| Main Authors: | , , , , , , |
| Format: | Journal Article |
| Published: |
Springer Nature
Aug2015
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=109594942&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 109594942 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Aug2015 vid: 25 iid: 8 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 109594942 103687109 NLM25693663 2013091310 10.1007/s00330-015-3632-4 NLM25693663 109594942 ppf: 2346 ppct: 8 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Automated attenuation-based tube voltage selection for body CTA: Performance evaluation of 192-slice dual-source CT. aug: au: Winklehner, Anna Gordic, Sonja Lauk, Eliane Frauenfelder, Thomas Leschka, Sebastian Alkadhi, Hatem Husarik, Daniela B sug: subj: Tomography, X-Ray Computed Methods Radiographic Image Interpretation, Computer-Assisted Methods Radiation Dosage Angiography Methods Diagnostic Imaging Methods Image Processing, Computer Assisted Methods Retrospective Design Contrast Media Middle Age Male Aged Reproducibility of Results Female Aged, 80 and Over Phantoms, Imaging Ferrans and Powers Quality of Life Index Scales Middle Aged: 45-64 years Aged: 65+ years Aged, 80 & over Male Female ab: Objective: To assess radiation dose and image quality in body CT-angiography (CTA) with automated attenuation-based tube voltage selection (ATVS) on a 192-slice dual-source CT (DSCT).Methods: Forty patients (69.5 ± 9.6 years) who had undergone body CTA with ATVS (ref.kVp 100, ref.mAs 90) using a 2x192-slice CT in single-source mode were retrospectively included. All patients had undergone prior CTA with a 2x128-slice CT and ATVS with identical imaging and contrast media protocols, serving for comparison. Images were reconstructed with iterative reconstruction at similar strength levels. Radiation dose was determined. Image quality was assessed semi-quantitatively (1:excellent, 5:non-diagnostic), aortic attenuation, noise and CNR were determined.Results: As compared to 128-slice DSCT, 192-slice DSCT selected tube voltages were lower in 30 patients (75 %), higher in 3 (7.5 %), and similar in 7 patients (17.5 %). CTDIvol was lower with 192-slice DSCT (4.7 ± 1.9 mGy vs. 5.8 ± 2.1 mGy; p < 0.001). Subjective image quality, mean aortic attenuation (342 ± 67HU vs. 268 ± 67HU) and CNR (9.8 ± 2.5 vs. 8.2 ± 2.9) were higher with 192-slice DSCT (all p < 0.01), all datasets being diagnostic.Conclusion: Our study suggests that ATVS of 192-slice DSCT for body CTA is associated with an improved image quality and further radiation dose reduction of 19 % compared to 128-slice DSCT.Key Points: • 192-slice DSCT allows imaging from 70 kVp to 150 kVp at 10 kVp increments. • 192-slice DSCT allows for radiation-dose reduction in body-CTA with ATVS. • Subjective and objective image quality increase compared to 128-slice DSCT. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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