Prototype metal artefact reduction algorithm in flat panel computed tomography - evaluation in patients undergoing transarterial hepatic radioembolisation.
Objective: To investigate the effect of an on-site prototype metal artefact reduction (MAR) algorithm in cone-beam CT-catheter-arteriography (CBCT-CA) in patients undergoing transarterial radioembolisation (RE) of hepatic masses.Methods and Materials: Ethical board approved retrospective study of 29...
| Publicado en: | European Radiology Vol. 28; no. 1; pp. 265 - 274 |
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| Autores principales: | , , , , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Jan2018
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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=126562797&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 126562797 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Jan2018 vid: 28 iid: 1 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 126562797 126562797 144153016 NLM28710583 10.1007/s00330-017-4946-1 NLM28710583 126562797 ppf: 265 ppct: 9 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Prototype metal artefact reduction algorithm in flat panel computed tomography - evaluation in patients undergoing transarterial hepatic radioembolisation. aug: au: Hamie, Qeumars Mustafa Kobe, Adrian Raoul Mietzsch, Leif Manhart, Michael Puippe, Gilbert Dominique Pfammatter, Thomas Guggenberger, Roman affil: Department of Radiology, University Hospital Zurich, Raemistrasse 100, 8091, Zurich, Switzerland sug: subj: Tomography, X-Ray Computed Methods Image Processing, Computer Assisted Methods Liver Neoplasms Artifacts Algorithms Retrospective Design Liver Neoplasms Radiotherapy Aged, 80 and Over Aged Middle Age Angiography Methods Male Female Metals Liver Adult Ferrans and Powers Quality of Life Index Aged, 80 & over Aged: 65+ years Middle Aged: 45-64 years Adult: 19-44 years Male Female ab: Objective: To investigate the effect of an on-site prototype metal artefact reduction (MAR) algorithm in cone-beam CT-catheter-arteriography (CBCT-CA) in patients undergoing transarterial radioembolisation (RE) of hepatic masses.Methods and Materials: Ethical board approved retrospective study of 29 patients (mean 63.7±13.7 years, 11 female), including 16 patients with arterial metallic coils, undergoing CBCT-CA (8s scan, 200 degrees rotation, 397 projections). Image reconstructions with and without prototype MAR algorithm were evaluated quantitatively (streak-artefact attenuation changes) and qualitatively (visibility of hepatic parenchyma and vessels) in near- (<1cm) and far-field (>3cm) of artefact sources (metallic coils and catheters). Quantitative and qualitative measurements of uncorrected and MAR corrected images and different artefact sources were compared RESULTS: Quantitative evaluation showed significant reduction of near- and far-field streak-artefacts with MAR for both artefact sources (p<0.001), while remaining stable for unaffected organs (all p>0.05). Inhomogeneities of attenuation values were significantly higher for metallic coils compared to catheters (p<0.001) and decreased significantly for both after MAR (p<0.001). Qualitative image scores were significantly improved after MAR (all p<0.003) with by trend higher artefact degrees for metallic coils compared to catheters.Conclusion: In patients undergoing CBCT-CA for transarterial RE, prototype MAR algorithm improves image quality in proximity of metallic coil and catheter artefacts.Key Points: • Metal objects cause artefacts in cone-beam computed tomography (CBCT) imaging. • These artefacts can be corrected by metal artefact reduction (MAR) algorithms. • Corrected images show significantly better visibility of nearby hepatic vessels and tissue. • Better visibility may facilitate image interpretation, save time and radiation exposure. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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