A Liver Phantom Study: CT Radiation Dose Reduction and Different Image Reconstruction Algorithms Affect Diagnostic Quality

@article{Brnne2016ALP,
  title={A Liver Phantom Study: CT Radiation Dose Reduction and Different Image Reconstruction Algorithms Affect Diagnostic Quality},
  author={Kristina Ragnhild Br{\ae}nne and L. I. Flinder and Marit Almenning Martiniussen and Kristin Jensen and C. Reisse and L. Julsrud and A. C. Martinsen},
  journal={Journal of Computer Assisted Tomography},
  year={2016},
  volume={40},
  pages={735–739}
}
Objective The aim of this study was to evaluate whether iterative reconstruction techniques for different dose levels and/or reduction of tube potential can increase liver lesion detectability. Methods An anthropomorphic liver phantom was scanned at different dose levels (CTDIvol 15 mGy, 7.5 mGy, 5 mGy, and 2.6 mGy) and tube potential levels (120 kV, 100 kV, and 80 kV). Images were reconstructed with the following algorithms: filtered back projection (FBP), adaptive statistical iterative… Expand
Low-dose CT imaging of a total hip arthroplasty phantom using model-based iterative reconstruction and orthopedic metal artifact reduction
TLDR
It is concluded that the combined use of IMR and O-MAR enables a reduction in radiation dose of 83% compared with FBP and iDose4 in the CT imaging of a THA phantom. Expand
Reducing metal artefacts and radiation dose in musculoskeletal CT imaging
Purpose: To quantify the impact of prosthesis material and design on the reduction of metal artefacts in total hip arthroplasties using virtual monochromatic dual-layer detector Spectral CT imaging.Expand
Optimal tube voltage for abdominal enhanced CT in children: a self-controlled study
TLDR
The 80-kV tube voltage provided the highest overall enhancement and CNR for the entire patient population and the best objective image quality for the 6.1–28.0 kg subgroup, suggesting the optimal tube voltage for children with weight <28 kg is 80 kV; higher voltages should be selected for children weighing 28.1 kg. Expand
Reducing metal artefacts and radiation dose in musculoskeletal CT imaging
TLDR
Results showed that the effectiveness of metal artefact reduction (MAR) depends on the used MAR approach and hardware type, and using model-based iterative reconstruction combined with aggressive radiation dose reduction in patients with THA is discouraged. Expand
Liver metastases: Detection and staging.
TLDR
This review gives a brief overview about the spectrum of imaging findings and an update about the performance, advantages and potential limitations of each modality as well as current developments and innovations. Expand

References

SHOWING 1-10 OF 19 REFERENCES
Combining automated attenuation-based tube voltage selection and iterative reconstruction: a liver phantom study
TLDR
The combination of automated attenuation-based tube-potential selection at 100 kVp and IR provides higher image quality and improved sensitivity for detecting hypodense liver lesions in vitro at a dose reduced by 26 %. Expand
Comparing five different iterative reconstruction algorithms for computed tomography in an ROC study
TLDR
Only two algorithms improved lesion detection, even though noise reduction was shown with all algorithms, while three algorithms did not significantly improve lesion detectability. Expand
Filtered back projection, adaptive statistical iterative reconstruction, and a model-based iterative reconstruction in abdominal CT: an experimental clinical study.
TLDR
The MBIR algorithm considerably improved objective and subjective image quality parameters of routine abdominal multidetector CT images compared with those of ASIR and FBP. Expand
Abdominal CT with model-based iterative reconstruction (MBIR): initial results of a prospective trial comparing ultralow-dose with standard-dose imaging.
TLDR
MBIR shows great potential for substantially reducing radiation doses at routine abdominal CT and both FBP and ASIR are limited in this regard owing to reduced image quality and diagnostic capability. Expand
Model-based iterative reconstruction and adaptive statistical iterative reconstruction techniques in abdominal CT: comparison of image quality in the detection of colorectal liver metastases.
TLDR
MBIR performed better than ASIR 50% at providing diagnostically acceptable CT scans without compromising image quality and in the detection of colorectal liver metastases. Expand
Abdominal CT: comparison of adaptive statistical iterative and filtered back projection reconstruction techniques.
TLDR
Comparison of image quality and lesion conspicuity on abdominal computed tomographic images acquired with different x-ray tube current-time products and reconstructed with adaptive statistical iterative reconstruction (ASIR) and filtered back projection (FBP) techniques shows ASIR lowers noise and improves diagnostic confidence in and conspicuity of subtle abdominal lesions at 8.4 mGy. Expand
Reducing Abdominal CT Radiation Dose With Adaptive Statistical Iterative Reconstruction Technique
TLDR
ASIR technique allows radiation dose reduction for abdominal CT examinations whereas improving image noise compared with the FBP technique, which however, was mild and did not affect the diagnostic acceptability of images. Expand
Iterative reconstruction methods in two different MDCT scanners: physical metrics and 4-alternative forced-choice detectability experiments--a phantom approach.
TLDR
VEO clearly confirms the tremendous potential of iterative reconstructions for dose reduction in CT and appears to be an important tool for patient follow-up, especially for pediatric patients where cumulative lifetime dose still remains high. Expand
Upgrade to iterative image reconstruction (IR) in abdominal MDCT imaging: a clinical study for detailed parameter optimization beyond vendor recommendations using the adaptive statistical iterative reconstruction environment (ASIR).
  • F. Mueck, M. Körner, +5 authors S. Wirth
  • Medicine
  • RoFo : Fortschritte auf dem Gebiete der Rontgenstrahlen und der Nuklearmedizin
  • 2012
TLDR
After the system upgrade, the vendor recommendation of ASIR 50’% in slice mode allowed for a dose reduction of 38 % in abdominal CT with comparable image quality and time expenditure, however, there is still further dose reduction potential for more complex reconstruction settings. Expand
Standard and reduced radiation dose liver CT images: adaptive statistical iterative reconstruction versus model-based iterative reconstruction-comparison of findings and image quality.
TLDR
Liver CT images reconstructed with MBIR model-based iterative reconstruction may allow up to 59% radiation dose reduction compared with the dose with ASIR adaptive statistical iterative reconstructions, without compromising depiction of findings or image quality. Expand
...
1
2
...