Characterization of attenuation and respiratory motion artifacts and their influence on SPECT MP image evaluation using a dynamic phantom assembly with variable cardiac defects

@article{ChrysanthouBaustert2016CharacterizationOA,
  title={Characterization of attenuation and respiratory motion artifacts and their influence on SPECT MP image evaluation using a dynamic phantom assembly with variable cardiac defects},
  author={Isabelle Chrysanthou-Baustert and I. Polycarpou and O. Demetriadou and L. Livieratos and A. Lontos and A. Antoniou and S. Christofides and C. Yiannakkaras and D. Kaolis and Christoforos Panagidis and P. Marsden and Y. Parpottas},
  journal={Journal of Nuclear Cardiology},
  year={2016},
  volume={24},
  pages={698-707}
}
BackgroundA phantom assembly that simulates the respiratory motion of the heart was used to investigate artifacts and their impact on defect detection.MethodsSPECT/CT images were acquired for phantoms with and without small and large cardiac defects during normal and deep breathing, and also at four static respiratory phases. Acquisitions were reconstructed with and without AC, and with misalignment of transmission and emission scans. A quantitative analysis was performed to assess artifacts… Expand
Anthropomorphic thorax phantom for cardio-respiratory motion simulation in tomographic imaging.
TLDR
A sophisticated anthropomorphic thorax phantom is presented that combines several aspects of a simulator for cardio-respiratory motion and is constructed to be MR-compatible, which means it can not only perform studies in PET, SPECT and CT, but also inside an MRI system. Expand
Have SPECT artifacts breathed their last?
  • C. Hansen
  • Medicine
  • Journal of Nuclear Cardiology
  • 2016
The ability to reconstruct a 3-dimensional distribution from its projections ranks among the greatest breakthroughs in medical imaging. The consequent revolution has transformed x-ray, nuclearExpand
Construction of Inflatable Lungs to Simulate Respiratory Motion in Myocardial Perfusion Imaging
TLDR
The aim of this work was to construct human-sized inflatable lungs with lung-equivalent density by injection molding and to validate the tidal volume and the breathing cycle of theinflatable lungs were mechanically validated. Expand
A new cardiac phantom for dynamic SPECT
TLDR
A novel dynamic cardiac phantom for emission tomography is developed that is capable of producing a wide range of TACs that can mimic physiological-like time-activity curves, similar to those observed in dynamic SPECT systems. Expand
Controlled Thoracic Motions of an Anthropomorphic Phantom for Myocardial Perfusion Imaging
TLDR
The aim of this study was to develop controlled thoracic motions on a cardiac phantom and a breathing phantom, which both are inserted within an anthropomorphic thorax phantom, to optimize myocardial perfusion imaging. Expand
Quantitative imaging: systematic review of perfusion/flow phantoms
TLDR
Insight is provided into contemporary phantom approaches to PI, which can be used for ground truth evaluation of quantitative PI applications and whether assumptions underlying PI phantom modelling are justified for their intended phantom application. Expand
Recent advances in cardiac SPECT instrumentation and imaging methods.
TLDR
This review mainly focuses on the most recent developments published since 2012 and points to the future of cardiac SPECT from an imaging physics perspective. Expand
Inter-reader variability of SPECT MPI readings in low- and middle-income countries: Results from the IAEA-MPI Audit Project (I-MAP)
TLDR
Inter-observer agreement was moderate-to-good for core group readers and good- to-excellent for expert readers, which confirm the important role of the IAEA training activities in improving imaging in low- and middle-income countries. Expand
Quantitative analysis of multiple biokinetic models using a dynamic water phantom: A feasibility study
TLDR
This study analyzed multiple biokinetic models using a dynamic water phantom custom-made with acrylic materials to model metabolic mechanisms in the human body and found that this work presented an acceptable feasibility study. Expand

References

SHOWING 1-10 OF 17 REFERENCES
Effect of respiratory motion in CT-based attenuation correction in SPECT using different CT scanners and protocols
  • W. Segars, B. Tsui
  • Physics, Medicine
  • IEEE Nuclear Science Symposium Conference Record, 2005
  • 2005
TLDR
It is concluded that respiratory motion is an important consideration in SPECT-CT imaging when using CT-based AC, and careful work must be done to design protocols to reduce CT artifacts while minimizing the mismatch between the CT and SPECT data. Expand
Effect of mechanically simulated diaphragmatic respiratory motion on myocardial SPECT processed with and without attenuation correction.
TLDR
The results support a clinical need for respiratory gating of myocardial SPECT images and support the ability of attenuation correction (AC) to correct for this artifact in the presence of diaphragmatic motion. Expand
Evaluation of Respiratory Motion Effect on Defect Detection in Myocardial Perfusion SPECT: A Simulation Study
TLDR
It is demonstrated that RM affects defect detectability of MPS imaging, and the results indicate that developments of optimal data acquisition methods and RM correction methods are needed to improve the defects detectability in MPS. Expand
Comparison of methods of acquiring attenuation maps for cardiac SPECT in the presence of respiratory motion
TLDR
The CBCT approach resulted in the best uniformity of the AC emission images, and phantom respiratory motion reduced the AI/LS ratio compared to when the phantoms were stationary. Expand
Effects of misalignment between transmission and emission scans on attenuation-corrected cardiac SPECT.
TLDR
The results indicate that a small misalignment between the transmission and emission data can produce serious errors in measured activity, and, thus, geometrical precision is essential for accurate diagnosis of AC SPECT images. Expand
Clinical validation of SPECT attenuation correction using x-ray computed tomography—derived attenuation maps: Multicenter clinical trial with angiographic correlation
TLDR
CT-based AC of SPECT images consistently improved overall diagnostic performance of readers with different interpretive attitudes and experience, and is well suited for routine use in clinical practice. Expand
Attenuation correction of myocardial SPECT studies using low resolution computed tomography images
TLDR
Attenuation correction using Hawkeye is likely to improve diagnostic accuracy in men, but is less likely to be useful in women. Expand
A study of apparent apical defects in attenuation corrected cardiac SPECT
There are a number of factors that affect the intensity of the apical region in cardiac SPECT images, which sometime lead to apparent defects in this region. In some patient studies, imagesExpand
Diagnostic sensitivity of SPECT myocardial perfusion imaging using a pumping cardiac phantom with inserted variable defects
TLDR
The diagnostic sensitivity of SPECT MPI procedures was improved when applying AC or GSPECT techniques to identify subendocardial defects in the inferior, anterior and apical segments of the myocardial wall of the left ventricle for all three body types. Expand
Attenuation Correction in Myocardial Perfusion SPECT/CT: Effects of Misregistration and Value of Reregistration
TLDR
Reregistration of misalignment significantly affected regional radiotracer distribution in the segments shown to be influenced by misregistration, which influences regional tracer distribution on attenuation-corrected myocardial images. Expand
...
1
2
...