{"id":5585,"date":"2023-09-04T03:10:26","date_gmt":"2023-09-04T03:10:26","guid":{"rendered":"https:\/\/cm.vastapps.dev\/tcia-collection\/cc-radiomics-phantom-3\/"},"modified":"2023-09-13T11:58:31","modified_gmt":"2023-09-13T11:58:31","slug":"cc-radiomics-phantom-3","status":"publish","type":"tcia_collection","link":"https:\/\/cm.vastapps.dev\/tcia-collection\/cc-radiomics-phantom-3\/","title":{"rendered":"CC-RADIOMICS-PHANTOM-3"},"featured_media":0,"template":"","citation-tax":[],"cancer_types":["Phantom"],"citations":[4449,2925],"collection_doi":"10.7937\/tcia.2019.j71i4fah","collection_download_info":"Click the Versions tab for more info about data releases.","collection_downloads":[4998,4999],"full_export":"
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Summary<\/h2>

There currently is a dearth of phantom scans on large samples.<\/span>\u00a0This data collection contains one physical phantom, imaged across three protocols, on 100 scanners. This provides population data that can be used to quantify inter-scanner variability. This data can be used to determine how robust specific radiomics or other quantitative imaging signatures are.<\/p>

Protocol<\/h3>

Computed tomography scans were acquired on 100 scanners at 35 clinics: 51 GE scanners, 20 Philips scanners, 11 Toshiba scanners, and 1 Philips and Neusoft Medical System scanner. The commonly used chest and head protocols of the local clinic were acquired without changing the protocol parameters. Additionally, a controlled protocol was acquired that was designed to minimize radiomics feature differences between manufacturers. The settings for the controlled protocol were: tube voltage, 120 kV(p); tube current, 200 mA\u2219s; helical scan type; spiral pitch factor, 1.0; 50-cm display field of view; and image thickness, 3 mm (except for GE scanners, which used an image thickness of 2.5 mm). The convolution kernel was standard for GE; C for Philips; B31f, B31s for Siemens; and FC08 for Toshiba. However, the kernel used for the Toshiba scans switched from FC18 (six scanners) to FC08 (five scanners) halfway through owing to a study by Mackin et al. (Medical Physics, 2018) that found the FC08 kernel to match the GE standard kernel best. K-means clustering showed that the scanners did not cluster by kernel type, thus all Toshiba scanners were included.<\/p>

There were 94 scanners that had a controlled protocol scan that could be used: 48 GE, 18 Philips, 17 Siemens, and 11 Toshiba scanners; 93 scanners that had a local chest protocol scan that could be used: 47 GE, 19 Philips, 17 Siemens, and 10 Toshiba scanners; and 88 scanners that had a local head protocol scan that could be used: 46 GE, 18 Philips, 14 Siemens, and 10 Toshiba scanners. The various reasons that scans could not be used were as follows: the field of view did not encompass all the cartridges, the scan extent did not cover the length of the phantom, and the scan was acquired with variable image thickness.<\/p>

Acknowledgements<\/h3>

This data set was provided to TCIA by Rachel Ger, Shouhao Zhou, Pai-Chun Chi, Hannah Lee, Rick Layman, Kyle Jones, David Goff, Carlos Cardenas, Clifton Fuller, Rebecca Howell, Heng Li, Jason Stafford, Laurence Court, Dennis Mackin.<\/span><\/p>

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