Optimization of reduced-dose MDCT of thoracic aorta using iterative reconstruction

Hüseyin Gürkan Töre, Pegah Entezari, Hamid Chalian, Fernanda Dias Gonzalez-Guindalini, Marcos Paulo Ferreira Botelho, Vahid Yaghmai*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

OBJECTIVE: To evaluate the contribution of iterative reconstruction on image quality of reduced-dose multidetector computed tomography of the thoracic aorta. METHODS: A torso phantom was scanned using two tube potentials (80 and 120 kVp) and five different tube currents (110, 75, 40, 20, and 10 mAs). All images were reconstructed with both filtered back projection (FBP) and iterative reconstruction. Aortic attenuation, image noise within the thoracic aorta, signal-to-noise ratio, and sharpness of the aortic wall were quantified in the phantom for the two reconstruction algorithms. Data were analyzed using paired t test. A value of P < 0.05 was considered significant. RESULTS: The aortic attenuation was similar for FBP and iterative reconstruction (P > 0.05). Image noise level was lower (P < 0.0001), and image sharpness was higher (P = 0.046) with iterative reconstruction. Signal-to-noise ratios were higher with iterative reconstruction compared with those with FBP (P < 0.0001). Signal-to-noise ratio at 80 kVp with iterative reconstruction (9.8 ± 4.4) was similar to the signal-to-noise ratio at 120 kVp with FBP (8.4 ± 3.3) (P = 0.196). CONCLUSIONS: Less image noise and higher image sharpness may be achieved with iterative reconstruction in reduced-dose multidetector computed tomography of the thoracic aorta.

Original languageEnglish (US)
Pages (from-to)72-76
Number of pages5
JournalJournal of Computer Assisted Tomography
Volume38
Issue number1
DOIs
StatePublished - Jan 2014

Keywords

  • Aorta
  • Filtered back projection
  • Image quality
  • Iterative reconstruction
  • MDCTangiography
  • Radiation dose reduction

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Fingerprint Dive into the research topics of 'Optimization of reduced-dose MDCT of thoracic aorta using iterative reconstruction'. Together they form a unique fingerprint.

Cite this