학술논문
Image quality in CT thorax: effect of altering reconstruction algorithm and tube load: Image quality in CT thorax
Document Type
Author
Kataria, Bharti, 1955; Woisetschläger, Mischa, 1974; Nilsson Althén, Jonas, 1969; Sandborg, Michael, 1961; Smedby, Örjan, Professor, 1956
Source
Radiation Protection Dosimetry. 200(5):504-514
Subject
Language
English
Abstract
Non-linear properties of iterative reconstruction (IR) algorithms can alter image texture. We evaluated the effect of a model-basedIR algorithm (advanced modelled iterative reconstruction; ADMIRE) and dose on computed tomography thorax image quality.Dual-source scanner data were acquired at 20, 45 and 65 reference mAs in 20 patients. Images reconstructed with filteredback projection (FBP) and ADMIRE Strengths 3–5 were assessed independently by six radiologists and analysed using an ordinallogistic regression model. For all image criteria studied, the effects of tube load 20 mAs and all ADMIRE strengths were significant(p < 0.001) when compared to reference categories 65 mAs and FBP. Increase in tube load from 45 to 65 mAs showed imagequality improvement in three of six criteria. Replacing FBP with ADMIRE significantly improves perceived image quality for allcriteria studied, potentially permitting a dose reduction of almost 70% without loss in image quality