Impact of organ-specific dose reduction on the image quality of head and neck CT angiography

Schimmöller, Lars; Lanzman, Rotem S.; Heusch, Philipp; Dietrich, Sandra; Miese, Falk; Aissa, Joel; Heusner, Till A.; Antoch, Gerald; Kröpil, Patric

doi:10.1007/s00330-012-2750-5

Cited by 9 publications

(1 citation statement)

References 22 publications

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“…Inter-observer agreement was determined using a Fleiss kappa with chance correction according to Brennan and Prediger [ 23 ]. Inter-observer agreement was defined as excellent (κ > 0.81), good (κ = 0.61–0.80), moderate (κ = 0.41–0.60), fair (κ = 0.21–0.40), and poor (κ ≤ 0.20) [ 24 ].…”

Section: Methodsmentioning

confidence: 99%

Impact of increasing levels of adaptive statistical iterative reconstruction on image quality in oil-based postmortem CT angiography in coronary arteries

et al. 2021

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Introduction Postmortem multi-detector computed tomography (PMCT) has become an important part in forensic imaging. Modern reconstruction techniques such as iterative reconstruction (IR) are frequently used in postmortem CT angiography (PMCTA). The image quality of PMCTA depends on the strength of IR. For this purpose, we aimed to investigate the impact of different advanced IR levels on the objective and subjective PMCTA image quality. Material and methods We retrospectively analyzed the coronary arteries of 27 human cadavers undergoing whole-body postmortem CT angiography between July 2017 and March 2018 in a single center. Iterative reconstructions of the coronary arteries were processed in five different level settings (0%; 30%; 50%; 70%; 100%) by using an adaptive statistical IR method. We evaluated the objective (contrast-to-noise ratio (CNR)) and subjective image quality in several anatomical locations. Results Our results demonstrate that the increasing levels of an IR technique have relevant impact on the image quality in PMCTA scans in forensic postmortem examinations. Higher levels of IR have led to a significant reduction of image noise and therefore to a significant improvement of objective image quality (+ 70%). However, subjective image quality is inferior at higher levels of IR due to plasticized image appearance. Conclusion Objective image quality in PMCTA progressively improves with increasing level of IR with the best CNR at the highest IR level. However, subjective image quality is best at low to medium levels of IR. To obtain a “classic” image appearance with optimal image quality, PMCTAs should be reconstructed at medium levels of IR.

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Section: Methodsmentioning

confidence: 99%