Relationship between physical parameters and visual analysis for assessment of image quality: a multi-center and multi-vendor phantom study in brain SPECT
| Autor: | Akie Sugiura, Takayuki Shibutani, Masahisa Onoguchi, Akio Nagaki, Kotatsu Tsuboi, Toshimune Ito, Hajime Ichikawa |
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| Jazyk: | angličtina |
| Rok vydání: | 2025 |
| Předmět: | |
| Zdroj: | Asia Oceania Journal of Nuclear Medicine and Biology, Vol 13, Iss 1, Pp 42-52 (2025) |
| Druh dokumentu: | article |
| ISSN: | 2322-5718 2322-5726 |
| DOI: | 10.22038/aojnmb.2024.75204.1524 |
| Popis: | Objective(s): Brain perfusion single-photon emission computed tomography (SPECT) image quality varies depending on SPECT systems. This study aimed to evaluate the relationship between physical parameters and visual analysis for assessment of the brain SPECT image quality. We conducted our phantom study under various conditions in a multi-center and multi-vendor study.Methods: SPECT images of the brain phantom were acquired from eight devices in five institutions. The phantom was filled with 28 kBq/ml of 99mTc solution at the start of scanning. We obtained various data with different acquisition times under clinical reconstruction and acquisition conditions at each institution. Four physical parameters (percent contrast, contrast noise ratio (CNR), asymmetry index (AI), and sharpness index (SI)) were measured with the phantom. Seven observers blindly evaluated all image series and scored them on a scale of 1–3 using four checkpoints: contrast, image noise, symmetry, and sharpness. The average score for all observers was calculated.Results: CNR increased with increasing visual analysis scores for contrast and image noise, both of which were significantly different between the group with scores “ |
| Databáze: | Directory of Open Access Journals |
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