An open library of CT patient projection data

Baiyu Chen; Shuai Leng; Lifeng Yu; David Holmes III; Joel Fletcher; Cynthia McCollough

doi:10.1117/12.2216823

25 March 2016 An open library of CT patient projection data

Baiyu Chen, Shuai Leng, Lifeng Yu, David Holmes III, Joel Fletcher, Cynthia McCollough

Proceedings Volume 9783, Medical Imaging 2016: Physics of Medical Imaging; 97831B (2016) https://doi.org/10.1117/12.2216823
Event: SPIE Medical Imaging, 2016, San Diego, California, United States

Abstract

Lack of access to projection data from patient CT scans is a major limitation for development and validation of new reconstruction algorithms. To meet this critical need, we are building a library of CT patient projection data in an open and vendor-neutral format, DICOM-CT-PD, which is an extended DICOM format that contains sinogram data, acquisition geometry, patient information, and pathology identification. The library consists of scans of various types, including head scans, chest scans, abdomen scans, electrocardiogram (ECG)-gated scans, and dual-energy scans. For each scan, three types of data are provided, including DICOM-CT-PD projection data at various dose levels, reconstructed CT images, and a free-form text file. Several instructional documents are provided to help the users extract information from DICOM-CT-PD files, including a dictionary file for the DICOM-CT-PD format, a DICOM-CT-PD reader, and a user manual. Radiologist detection performance based on the reconstructed CT images is also provided. So far 328 head cases, 228 chest cases, and 228 abdomen cases have been collected for potential inclusion. The final library will include a selection of 50 head, chest, and abdomen scans each from at least two different manufacturers, and a few ECG-gated scans and dual-source, dual-energy scans. It will be freely available to academic researchers, and is expected to greatly facilitate the development and validation of CT reconstruction algorithms.

Citation Download Citation

Baiyu Chen, Shuai Leng, Lifeng Yu, David Holmes III, Joel Fletcher, and Cynthia McCollough "An open library of CT patient projection data", Proc. SPIE 9783, Medical Imaging 2016: Physics of Medical Imaging, 97831B (25 March 2016); https://doi.org/10.1117/12.2216823

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