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Iterative reconstruction improves image quality and reduces radiation dose in trauma protocols; A human cadaver study.
Godt, Johannes Clemens; Johansen, Cathrine K; Martinsen, Anne Catrine T; Schulz, Anselm; Brøgger, Helga M; Jensen, Kristin; Stray-Pedersen, Arne; Dormagen, Johann Baptist.
Afiliação
  • Godt JC; Department of Radiology and Nuclear Medicine, Oslo University Hospital Ullevål, Oslo, Norway.
  • Johansen CK; Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
  • Martinsen ACT; Department of Radiology and Nuclear Medicine, Oslo University Hospital Ullevål, Oslo, Norway.
  • Schulz A; The Research Department, Sunnaas Rehabilitation Hospital, Norway.
  • Brøgger HM; Faculty of Health Sciences, Oslo Metropolitan University, Oslo, Norway.
  • Jensen K; Department of Diagnostic Physics, Oslo University Hospital, Oslo, Norway.
  • Stray-Pedersen A; Department of Radiology and Nuclear Medicine, Oslo University Hospital Ullevål, Oslo, Norway.
  • Dormagen JB; Department of Diagnostic Physics, Oslo University Hospital, Oslo, Norway.
Acta Radiol Open ; 10(10): 20584601211055389, 2021 Oct.
Article em En | MEDLINE | ID: mdl-34840815
BACKGROUND: Radiation-related cancer risk is an object of concern in CT of trauma patients, as these represent a young population. Different radiation reducing methods, including iterative reconstruction (IR), and spilt bolus techniques have been introduced in the recent years in different large scale trauma centers. PURPOSE: To compare image quality in human cadaver exposed to thoracoabdominal computed tomography using IR and standard filtered back-projection (FBP) at different dose levels. MATERIAL AND METHODS: Ten cadavers were scanned at full dose and a dose reduction in CTDIvol of 5 mGy (low dose 1) and 7.5 mGy (low dose 2) on a Siemens Definition Flash 128-slice computed tomography scanner. Low dose images were reconstructed with FBP and Sinogram affirmed iterative reconstruction (SAFIRE) level 2 and 4. Quantitative image quality was analyzed by comparison of contrast-to-noise ratio (CNR) and signal-to-noise ratio (SNR). Qualitative image quality was evaluated by use of visual grading regression (VGR) by four radiologists. RESULTS: Readers preferred SAFIRE reconstructed images over FBP at a dose reduction of 40% (low dose 1) and 56% (low dose 2), with significant difference in overall impression of image quality. CNR and SNR showed significant improvement for images reconstructed with SAFIRE 2 and 4 compared to FBP at both low dose levels. CONCLUSIONS: Iterative image reconstruction, SAFIRE 2 and 4, resulted in equal or improved image quality at a dose reduction of up to 56% compared to full dose FBP and may be used a strong radiation reduction tool in the young trauma population.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Qualitative_research Idioma: En Revista: Acta Radiol Open Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Noruega País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Qualitative_research Idioma: En Revista: Acta Radiol Open Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Noruega País de publicação: Reino Unido