Respiratory lung motion analysis using a nonlinear motion correction technique for respiratory-gated lung perfusion SPECT images

2007 ◽  
Vol 21 (3) ◽  
pp. 175-183 ◽  
Author(s):  
Hidenori Ue ◽  
Hideaki Haneishi ◽  
Hideyuki Iwanaga ◽  
Kazuyoshi Suga
Keyword(s):  
Motion Analysis ◽  
Motion Correction ◽  
Lung Perfusion ◽  
Lung Motion ◽  
Nonlinear Motion ◽  
Correction Technique ◽  
Perfusion Spect ◽  
Spect Images

Nonlinear motion correction of respiratory-gated lung SPECT images

2006 ◽  
Vol 25 (4) ◽  
pp. 486-495 ◽  
Author(s):  
H. Ue ◽  
H. Haneishi ◽  
H. Iwanaga ◽  
K. Suga
Keyword(s):  
Motion Correction ◽  
Nonlinear Motion ◽  
Spect Images

scholarly journals Evaluation of DISORDER: retrospective image motion correction for volumetric brain MRI in a pediatric setting

2020 ◽  
Author(s):  
Katy Vecchiato ◽  
Alexia Egloff ◽  
Olivia Carney ◽  
Ata Siddiqui ◽  
Emer Hughes ◽  
...  
Keyword(s):  
Image Quality ◽  
Motion Correction ◽  
Spin Echo ◽  
Brain Mri ◽  
Quality Metrics ◽  
Image Motion ◽  
Reference Image ◽  
Outlier Rejection ◽  
Image Quality Metrics ◽  
Correction Technique

Background and Purpose: Head motion causes image degradation in brain MRI examinations, negatively impacting image quality, especially in pediatric populations. Here, we used a retrospective motion correction technique in children and assessed image quality improvement for 3D MRI acquisitions. Material and Methods: We prospectively acquired brain MRI at 3T using 3D sequences, T1-weighted MPRAGE, T2-weighted Turbo Spin Echo and FLAIR, in 32 unsedated children, including 7 with epilepsy (age range 2-18 years). We implemented a novel motion correction technique: Distributed and Incoherent Sample Orders for Reconstruction Deblurring using Encoding Redundancy (DISORDER). For each subject and modality, we obtained 3 reconstructions: as acquired (Aq), after DISORDER motion correction (Di), and Di with additional outlier rejection (DiOut). We analyzed 288 images quantitatively, measuring 2 objective no-reference image quality metrics: Gradient Entropy (GE) and MPRAGE White Matter Homogeneity (WM-H). As a qualitative metric, we presented blinded and randomized images to 2 expert neuroradiologists who scored them for clinical readability. Results: Both image quality metrics improved after motion correction for all modalities and improvement correlated with the amount of intrascan motion. Neuroradiologists also considered the motion corrected images as of higher quality (Wilcoxon z=-3.164 MPRAGE, z=-2.066 TSE, z=-2.645 FLAIR, for all p<0.05). Conclusions: Retrospective image motion correction with DISORDER increased image quality both from an objective and qualitative perspective. In 75% of sessions, at least one sequence was improved by this approach, indicating the benefit of this technique in un-sedated children for both clinical and research environments.

Distribution of Ventilation in Lung Transplant Recipients: Evaluation by Dynamic 3He-MRI With Lung Motion Correction

2003 ◽  
Vol 38 (6) ◽  
pp. 341-348 ◽  
Author(s):  
Klaus Kurt Gast ◽  
Michael Ulrich Puderbach ◽  
Ignacio Rodriguez ◽  
Balthasar Eberle ◽  
Klaus Markstaller ◽  
...  
Keyword(s):  
Motion Correction ◽  
Lung Transplant ◽  
Transplant Recipients ◽  
Lung Motion ◽  
Lung Transplant Recipients

Degradation of myocardial perfusion SPECT images caused by contaminants in thallous (201Tl) chloride

2008 ◽  
Vol 35 (5) ◽  
pp. 922-932 ◽  
Author(s):  
Steven G. Staelens ◽  
Tim C. de Wit ◽  
Ignace A. Lemahieu ◽  
Freek J. Beekman
Keyword(s):  
Myocardial Perfusion ◽  
Myocardial Perfusion Spect ◽  
Perfusion Spect ◽  
Spect Images

Soft tissue attenuation patterns in stress myocardial perfusion SPECT images: A comparison between supine and upright acquisition systems

2011 ◽  
Vol 18 (2) ◽  
pp. 281-290 ◽  
Author(s):  
David Chawla ◽  
Mouyyad Rahaby ◽  
Amit P. Amin ◽  
Raj Vashistha ◽  
Tareq Alyousef ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Myocardial Perfusion ◽  
Myocardial Perfusion Spect ◽  
Stress Myocardial Perfusion ◽  
Perfusion Spect ◽  
Soft Tissue Attenuation ◽  
Spect Images

Enhanced perfusion defect clarity and inhomogeneity in smokers?? lungs with deep-inspiratory breath-hold perfusion SPECT images

2005 ◽  
Vol 26 (9) ◽  
pp. 801-807 ◽  
Author(s):  
Kazuyoshi Suga ◽  
Kawakami Yasuhiko ◽  
Hideyuki Iwanaga ◽  
Norio Hayashi ◽  
Tomio Yamashita ◽  
...  
Keyword(s):  
Perfusion Defect ◽  
Breath Hold ◽  
Perfusion Spect ◽  
Spect Images
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