Combining automated attenuation-based tube voltage selection and iterative reconstruction: a liver phantom study.
Objectives: To determine the value of combined automated attenuation-based tube-potential selection and iterative reconstructions (IRs) for optimising computed tomography (CT) imaging of hypodense liver lesions.Methods: A liver phantom containing hypodense lesions was imaged by CT with and without a...
| Publicado en: | European Radiology Vol. 24; no. 3; pp. 657 - 668 |
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| Autores principales: | , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
Mar2014
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104022339&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104022339 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Mar2014 vid: 24 iid: 3 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 104022339 NLM24154792 2012474360 10.1007/s00330-013-3049-x NLM24154792 104022339 ppf: 657 ppct: 11 formats: fmt: @attributes: type: P tig: atl: Combining automated attenuation-based tube voltage selection and iterative reconstruction: a liver phantom study. aug: au: Husarik, Daniela B Schindera, Sebastian T Morsbach, Fabian Chuck, Natalie Seifert, Burkhardt Szucs-Farkas, Zsolt Alkadhi, Hatem affil: Institute for Diagnostic and Interventional Radiology, University Hospital Zurich, Raemistrasse 100, 8091, Zurich, Switzerland, danielahusarik@yahoo.com. sug: subj: Liver Radiography Liver Diseases Radiography Phantoms, Imaging Radiographic Image Interpretation, Computer-Assisted Methods Tomography, X-Ray Computed Methods Algorithms Artifacts Liver Function Tests Radiation Dosage Radiographic Image Interpretation, Computer-Assisted Equipment and Supplies Radiographic Image Interpretation, Computer-Assisted Standards Sensitivity and Specificity Tomography, X-Ray Computed Equipment and Supplies Tomography, X-Ray Computed Standards ab: Objectives: To determine the value of combined automated attenuation-based tube-potential selection and iterative reconstructions (IRs) for optimising computed tomography (CT) imaging of hypodense liver lesions.Methods: A liver phantom containing hypodense lesions was imaged by CT with and without automated attenuation-based tube-potential selection (80, 100 and 120 kVp). Acquisitions were reconstructed with filtered back projection (FBP) and sinogram-affirmed IR. Image noise and contrast-to-noise ratio (CNR) were measured. Two readers marked lesion localisation and rated confidence, sharpness, noise and image quality on a five-point scale (1 = worst, 5 = best).Results: Image noise was lower (31-52%) and CNR higher (43-102%) on IR than on FBP images at all tube voltages. On 100-kVp and 80-kVp IR images, confidence and sharpness were higher than on 120-kVp FBP images. Scores for image quality score and noise as well as sensitivity for 100-kVp IR were similar or higher than for 120-kVp FBP and lower for 80-kVp IR. Radiation dose was reduced by 26% at 100 kVp and 56% at 80 kVp.Conclusions: Compared with 120-kVp FBP images, the combination of automated attenuation-based tube-potential selection at 100 kVp and IR provides higher image quality and improved sensitivity for detecting hypodense liver lesions in vitro at a dose reduced by 26%.Key Points: • Combining automated tube voltage selection/iterative CT reconstruction improves image quality. • Attenuation values remain stable on IR compared with FBP images. • Lesion detection was highest on 100-kVp IR images. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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