Aims and objectives
The dramatic rise in the number of Computed Tomography (CT) examinations has led to an increase in cumulative population dose  and concern has been raised as to the adverse effects of ionizing radiation,
especially in children and young adults who are more sensitive to radiation [2,3,4].
Hence efforts are being made to reduce the number of unnecessary CT examinations and patient dose associated with each examination by optimizing examination protocols. The aim of this study was to evaluate...
Methods and materials
This study was approved by the regional ethical board.
Written consent was obtained from all patients included in the study.
With a third-generation 192-section dual-source CT scanner,
we prospectively obtained two data sets each for 25 patients at 30% and 70% tube loads byproportionately splitting the tube load for a standard full-dose abdominal protocol between the two sources.
The scan parameters are shown in Table 1 . The patient population consisted of 13 females and 12 males,
Preliminary Results Qualitative assessment Effect of tube load For all the image criteria assessed,
when comparing 30% and 70% tube loads,
improved image quality was observed as a significant strong effect for the higher tube load regardless of MBIR strength ( p <0.001) (Fig.1–5, Table 2 ). Similar results are observed with significant strong effect of higher tube load when comparing the two strengths of the algorithm and same slice thickness individually ( Table 4 ). Effect of iterative...
Our intention with this observer evaluation and objective phantom measurement study was to obtain valuable information about the clinical utility of the MBIR algorithm and to estimate the potential dose reduction in order to assess the desired clinical image quality in abdominal CT for optimization purposes. A visual demonstration of image quality comparison between30% and 70% dose levels reconstructed with MBIR strenghts 3 and 5 at slice thickness 1mm ( Fig. 10 ),
2 mm ( Fig. 11 ) and 3 mm (...
Presenting author: Bharti Kataria BSc,
MSc Department of Radiology,Department of Medical & Health Sciences,
Center for Medical Image Science & Visualization (CMIV),
Sweden E-mail: Bharti.Kataria@liu.se Address: County Council of Östergötland,
DC Department of Radiology, S-581 85 Linköping, Sweden Jonas Nilsson Althén,
MSc Department of Medical Physics,
Department of Medical & Health Sciences,
Sweden Address: County Council of...
Rising use of diagnostic medical imaging in a large integrated health system.
Health Aff(Milwood) (Project Hope).
Radiation dose associated with common computed tomography examinations and the associated lifetime attributable risk of cancer.
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2009;169(22):2078-86. 3.Journy NM,