Journal: Physics in medicine and biology

Article Title: Practical implementation of tetrahedral mesh reconstruction in emission tomography

doi: 10.1088/0031-9155/58/9/3001

Figure Lengend Snippet: (a) Jaszczak phantom reconstruction, three slices through the 88 × 88 × 48 volume, 8 ML-EM iterations, 4.42 mm pixels, top: mesh-based, bottom: voxel-based. (b) Same as previous, 32 iterations. (c) Same as previous, 128 iterations. (d) Variances for the 32-iteration reconstruction. (e) SNR as the function of NML-EM for three ROIs. Note 1: The maximum displayed intensity for the variance images (d) is 1/10th of that of Imax in the images (a–c). Note 2: The green arrows in images (a–c) point at the feature where the intensities are not reconstructed correctly after fewer iterations.

Article Snippet: Physical phantom study SPECT projection datasets of the Jaszczak torso phantom were simulated using the database described in detail in (Sitek et al 2006b).

Techniques:

Journal: EJNMMI Physics

Article Title: Performance evaluation of a novel brain-dedicated SPECT system

doi: 10.1186/s40658-018-0203-1

Figure Lengend Snippet: Reconstructed images of Jaszczak phantom, with the top plane showing the hot spheres, with a sphere-to-background ratio of 4.4 to 1, and the bottom plane showing the cold rods insert. Left column shows the clinical, and the right column shows the research reconstruction results

Article Snippet: A Jaszczak phantom with a diameter of 140 mm was custom made by Neurologica to fit the size of the InSPira HD.

Techniques:

Journal: EJNMMI Physics

Article Title: Performance evaluation of a novel brain-dedicated SPECT system

doi: 10.1186/s40658-018-0203-1

Figure Lengend Snippet: Recovery coefficients for the six spheres in the small Jaszczak phantom with a sphere-to-background ratio of 4.4:1

Article Snippet: A Jaszczak phantom with a diameter of 140 mm was custom made by Neurologica to fit the size of the InSPira HD.

Techniques:

Journal: EJNMMI Physics

Article Title: Performance evaluation of a novel brain-dedicated SPECT system

doi: 10.1186/s40658-018-0203-1

Figure Lengend Snippet: Top: reconstructed images (sum of four slices) of the uniform compartment of the Jaszczak phantom, for the clinical reconstruction ( a ) and the research reconstruction ( b ) algorithm. Bottom: activity concentrations profile across the summed slices as indicated in the displayed images (in blue)

Article Snippet: A Jaszczak phantom with a diameter of 140 mm was custom made by Neurologica to fit the size of the InSPira HD.

Techniques: Activity Assay

Journal: EJNMMI Physics

Article Title: Comparison of image quality and spatial resolution between 18 F, 68 Ga, and 64 Cu phantom measurements using a digital Biograph Vision PET/CT

doi: 10.1186/s40658-022-00487-7

Figure Lengend Snippet: Jaszczak phantom (left) and NEMA PET body phantom (right). The Jaszczak phantom was used for qualitative evaluation of spatial resolution and image quality. It features cold rods (4.8 mm, 6.4 mm, 7.9 mm, 9.5 mm, 11.1 mm, and 12.7 mm in diameter) and spheres (9.5 mm, 12.7 mm, 15.9 mm, 19.1 mm, 25.4 mm, and 31.8 mm in diameter) surrounded by an activity-filled background compartment. The NEMA PET body phantom (right) was used for semiquantitative assessment of image quality. It features spheres of different sizes (10 mm, 13 mm, 17 mm, 22 mm, 28 mm, and 37 mm in diameter), which can be filled with radioactivity allowing hot spot imaging. The spheres are surrounded by a background compartment, which can also be filled with radioactivity. The cylindrical lung insert is positioned in the center of the phantom. It simulates patient lung tissue and features a density similar to lung tissue

Article Snippet: A Jaszczak phantom (Model ECT/DLX/P, Data Spectrum Corporation, Durham, USA) was used to qualitatively evaluate spatial resolution and image quality.

Techniques: Activity Assay, Radioactivity, Imaging

Journal: EJNMMI Physics

Article Title: Comparison of image quality and spatial resolution between 18 F, 68 Ga, and 64 Cu phantom measurements using a digital Biograph Vision PET/CT

doi: 10.1186/s40658-022-00487-7

Figure Lengend Snippet: PET images of the Jaszczak phantom filled with 18 F-FDG (left), 68 Ga-HCl (middle), or 64 Cu-HCl (right). Transversal planes at the height of the rods (top) and spheres (bottom). Images were acquired and reconstructed using the same scanner and reconstruction methods and used for qualitative evaluation of spatial resolution

Article Snippet: A Jaszczak phantom (Model ECT/DLX/P, Data Spectrum Corporation, Durham, USA) was used to qualitatively evaluate spatial resolution and image quality.

Techniques:

Journal: EJNMMI Physics

Article Title: Head-to-head comparison of a Si-photomultiplier-based and a conventional photomultiplier-based PET-CT system

doi: 10.1186/s40658-021-00366-7

Figure Lengend Snippet: The ratio between the Discovery MI and the Discovery 690 of the sphere peak /background peak ratio for acquisition times 600–15 s/bed in the cylindrical Jaszczak phantom. The spheres had diameters between 3.95 and 9.89 mm and the phantom was filled with 18 F-FDG. The sphere-to-background ratios (SBRs) were 15:1, 7.5:1, and 3.75:1, respectively

Article Snippet: The cylindrical Jaszczak phantom (Data Spectrum Corporation, Durham, NC, USA) (diameter of 21.6 cm and a volume of 6.9 L) with microspheres (4.0, 5.0, 6.2, 9.9, 11.9, and 14.4 mm diameter) was used.

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Journal: EJNMMI Physics

Article Title: Head-to-head comparison of a Si-photomultiplier-based and a conventional photomultiplier-based PET-CT system

doi: 10.1186/s40658-021-00366-7

Figure Lengend Snippet: Detectability of the small spheres in the Jaszczak phantom at different sphere-to-background ratios (SBRs) and different acquisition time for the Discovery MI and Discovery 690 scanners

Article Snippet: The cylindrical Jaszczak phantom (Data Spectrum Corporation, Durham, NC, USA) (diameter of 21.6 cm and a volume of 6.9 L) with microspheres (4.0, 5.0, 6.2, 9.9, 11.9, and 14.4 mm diameter) was used.

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