Journal: EJNMMI Physics

Article Title: Validation of the physiological background correction method for the suppression of the spill-in effect near highly radioactive regions in positron emission tomography

doi: 10.1186/s40658-018-0233-8

Figure Lengend Snippet: The spill-in and spill-out effects as a function of lesion size for lesions L1–L3 and background lesion B at bladder SUV 55.5. The SUVs were obtained from OSEM reconstructed images using the mean SUVs of all noise realisations at 30 full iterations with a 4-mm Gaussian post-filter. The error bars are the standard error of the mean (SEM) while the dashed horizontal line denotes the true simulated lesion SUV. Background lesion B is the reference which shows the expected lesion SUV without spill-in effect

Article Snippet: This PSF was specified as a 3D Gaussian filter with 4.2 mm and 5.7 mm FWHM in transverse and axial planes, respectively, according to experimental values obtained for the GE PET/MR scanner [ ].

Techniques:

Journal: EJNMMI Physics

Article Title: Validation of the physiological background correction method for the suppression of the spill-in effect near highly radioactive regions in positron emission tomography

doi: 10.1186/s40658-018-0233-8

Figure Lengend Snippet: The % relative change in lesion SUV (as bladder SUV increases from SUV 8.5 to SUV 55.5) as a function of increasing iteration. This is obtained from a single noise realisation and for lesion L3 of diameter 10 mm with a 4-mm Gaussian post-filter

Article Snippet: This PSF was specified as a 3D Gaussian filter with 4.2 mm and 5.7 mm FWHM in transverse and axial planes, respectively, according to experimental values obtained for the GE PET/MR scanner [ ].

Techniques:

Journal: EJNMMI Physics

Article Title: Validation of the physiological background correction method for the suppression of the spill-in effect near highly radioactive regions in positron emission tomography

doi: 10.1186/s40658-018-0233-8

Figure Lengend Snippet: The NEMA bottle phantom used for the validation. The first row shows the MRAC image of the phantom and the middle row is the segmented bottle from the MRAC image, while the last row is showing the coronal view of the reconstructed images at three full iterations with a 4-mm Gaussian filter for OSEM, OSEM+PSF and OSEM+PSF+BC reconstructions, respectively. The blue arrows in the reconstructed images are pointing to the spheres in which there is visual improvement

Article Snippet: This PSF was specified as a 3D Gaussian filter with 4.2 mm and 5.7 mm FWHM in transverse and axial planes, respectively, according to experimental values obtained for the GE PET/MR scanner [ ].

Techniques:

Journal: EJNMMI Physics

Article Title: Validation of the physiological background correction method for the suppression of the spill-in effect near highly radioactive regions in positron emission tomography

doi: 10.1186/s40658-018-0233-8

Figure Lengend Snippet: The normalised mean activities within the dilated shells surrounding the NEMA bottle obtained at three full iterations with a no post-filter and b 4-mm Gaussian post-filter. This demonstrates how spill-in activity from the hot bottle to the surrounding shells reduces as we move farther away from the bottle. The voxel activities were normalised with the actual activity in the spheres

Article Snippet: This PSF was specified as a 3D Gaussian filter with 4.2 mm and 5.7 mm FWHM in transverse and axial planes, respectively, according to experimental values obtained for the GE PET/MR scanner [ ].

Techniques: Activity Assay

Journal: EJNMMI Physics

Article Title: Validation of the physiological background correction method for the suppression of the spill-in effect near highly radioactive regions in positron emission tomography

doi: 10.1186/s40658-018-0233-8

Figure Lengend Snippet: Validating the effect and correction of spill-in effect using patient data. This figure shows the normalised mean values within the dilated shells surrounding the spleen at a 3 full iterations with no post-filter, b 20 full iterations with no post-filter, c 3 full iterations with a 4-mm Gaussian post-filter and d 20 full iterations with a 4-mm Gaussian post-filter. The mean activity values in the dilated shells were normalised with the mean activity in the liver

Article Snippet: This PSF was specified as a 3D Gaussian filter with 4.2 mm and 5.7 mm FWHM in transverse and axial planes, respectively, according to experimental values obtained for the GE PET/MR scanner [ ].

Techniques: Activity Assay

Journal: bioRxiv

Article Title: Large-scale quantification of human osteocyte lacunar morphological biomarkers as assessed by ultra-high-resolution desktop micro-computed tomography

doi: 10.1101/2021.01.05.425223

Figure Lengend Snippet: Individualized threshold selection. A) Iterative application of many single thresholds and each compared with the manual identification 3D coordinates of a given image subregion. Optimum threshold was defined as the single threshold that maximized the true positive rate and minimized the false detection rate. B) Typical TMD histogram of the bone biopsy’s micro-CT image. Optimum threshold (green) determined from (A) and the distribution characteristics including the critical point (g’) and curve width (2sigma) were calculated from the Gaussian fit of the data. C) Correlation between the optimum threshold for each of the five manually segmented subregions and the corresponding critical point (g’) from each respective TMD histogram. D) Correlation between the optimum threshold for each of the five manually segmented subregions and the corresponding distribution width (2sigma) from each respective TMD histogram.

Article Snippet: Preprocessing of each image consisted of a constrained 3D Gaussian low pass filter (σ=0.8, support =1) to reduce noise and was applied using IPL (Scanco Medical AG, Brüttisellen, Switzerland).

Techniques: Selection, Micro-CT

Journal: Additive manufacturing

Article Title: Invited Review Article: Metal-additive manufacturing — Modeling strategies for application-optimized designs

doi: 10.1016/j.addma.2018.06.024

Figure Lengend Snippet: Selected thermomechanical modeling literature, the authors’ overall strategy, and major outcomes.

Article Snippet: [ 73 ] Stainless Steel 316 Gaussian Inactive 3D-Indirectly Coupled-FE ANSYS Residual stress calculation is reduced at high temperature when temperature-dependent thermophysical properties are accounted for.

Techniques: Convection

Journal: NeuroImage : Clinical

Article Title: Translating state-of-the-art spinal cord MRI techniques to clinical use: A systematic review of clinical studies utilizing DTI, MT, MWF, MRS, and fMRI

doi: 10.1016/j.nicl.2015.11.019

Figure Lengend Snippet: Summary of MT studies.

Article Snippet: ; prospective, longitudinal , ALS (29), no HCs , 3 T; Siemens; neck/spine coil; NR , • C2–T2 52 axial slices, gap NR , • 3D GE ± MT pre-pulse (Gaussian, 1.2 kHz offset, 10 ms) , 230 mm 2 ; 256 × 256; 0.9 × 0.9 × 2 mm 3 ; 28/3.2; no; 5 min , MTR , Manual, 4 ROIs: ACs, DCs, L/R LCSTs , • ALSFRS-R • Muscle power • FU at 1 year , • MTR at 1 year decreased from baseline: 30 vs. 33, P = 0.003 • No correlation between change in MTR and change in clinical scores • Baseline MTR not predictive of 1 year outcome , Moderately high; no correlation/prediction found, manual ROIs.

Techniques: Diagnostic Assay, Activation Assay, Isolation

Journal: Additive manufacturing

Article Title: Invited Review Article: Metal-additive manufacturing — Modeling strategies for application-optimized designs

doi: 10.1016/j.addma.2018.06.024

Figure Lengend Snippet: Selected thermomechanical modeling literature, the authors’ overall strategy, and major outcomes.

Article Snippet: [ 71 ] Inconel 718 Gaussian Quiet 3-D Coupled, ABAQUS Rotating 45° scan patterns produce the lowest planar stresses and deformation when compared with other scanning strategies Open in a separate window Selected thermomechanical modeling literature, the authors’ overall strategy, and major outcomes.

Techniques: Convection