Impact of model-based iterative reconstruction on low-contrast lesion detection and image quality in abdominal CT: a 12-reader-based comparative phantom study with filtered back projection at different tube voltages.
Objectives: To evaluate the impact of model-based iterative reconstruction (MBIR) on image quality and low-contrast lesion detection compared with filtered back projection (FBP) in abdominal computed tomography (CT) of simulated medium and large patients at different tube voltages.Methods: A phantom...
| Publicado en: | European Radiology Vol. 27; no. 12; pp. 5252 - 5260 |
|---|---|
| Autores principales: | , , , , , , , , , , , , , , , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Springer Nature
Dec2017
|
| 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=126091229&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 126091229 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Dec2017 vid: 27 iid: 12 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 126091229 126091229 144065580 NLM28374080 126091229 10.1007/s00330-017-4825-9 NLM28374080 126091229 ppf: 5252 ppct: 8 formats: fmt: @attributes: type: P tig: atl: Impact of model-based iterative reconstruction on low-contrast lesion detection and image quality in abdominal CT: a 12-reader-based comparative phantom study with filtered back projection at different tube voltages. aug: au: Euler, André Stieltjes, Bram Szucs-Farkas, Zsolt Eichenberger, Reto Reisinger, Clemens Hirschmann, Anna Zaehringer, Caroline Kircher, Achim Streif, Matthias Bucher, Sabine Buergler, David D'Errico, Luigia Kopp, Sebastién Wilhelm, Markus Schindera, Sebastian Euler, André Kopp, Sebastién Schindera, Sebastian T affil: Clinic of Radiology and Nuclear Medicine , University Hospital Basel , Basel Switzerland sug: subj: Algorithms Phantoms, Imaging Radiographic Image Interpretation, Computer-Assisted Methods Tomography, X-Ray Computed Standards Human Radiation Dosage Validation Studies Comparative Studies Evaluation Research Multicenter Studies ab: Objectives: To evaluate the impact of model-based iterative reconstruction (MBIR) on image quality and low-contrast lesion detection compared with filtered back projection (FBP) in abdominal computed tomography (CT) of simulated medium and large patients at different tube voltages.Methods: A phantom with 45 hypoattenuating lesions was placed in two water containers and scanned at 70, 80, 100, and 120 kVp. The 120-kVp protocol served as reference, and the volume CT dose index (CTDIvol) was kept constant for all protocols. The datasets were reconstructed with MBIR and FBP. Image noise and contrast-to-noise-ratio (CNR) were assessed. Low-contrast lesion detectability was evaluated by 12 radiologists.Results: MBIR decreased the image noise by 24% and 27%, and increased the CNR by 30% and 29% for the medium and large phantoms, respectively. Lower tube voltages increased the CNR by 58%, 46%, and 16% at 70, 80, and 100 kVp, respectively, compared with 120 kVp in the medium phantom and by 9%, 18% and 12% in the large phantom. No significant difference in lesion detection rate was observed (medium: 79-82%; large: 57-65%; P > 0.37).Conclusions: Although MBIR improved quantitative image quality compared with FBP, it did not result in increased low-contrast lesion detection in abdominal CT at different tube voltages in simulated medium and large patients.Key Points: • MBIR improved quantitative image quality but not lesion detection compared with FBP. • Increased CNR by low tube voltages did not improve lesion detection. • Changes in image noise and CNR do not directly influence diagnostic accuracy. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|