{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:30:46Z","timestamp":1760243446869,"version":"build-2065373602"},"reference-count":7,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2013,4,18]],"date-time":"2013-04-18T00:00:00Z","timestamp":1366243200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A research prototype CT scanner is currently under development in our lab. One of the key components in this project is the CT detector. This paper describes the design and performance evaluation of the modular CT detector unit for our proposed scanner. It consists of a Photodiode Array Assembly which captures irradiating X-ray photons and converts the energy into electrical current, and a mini Data Acquisition System which performs current integration and converts the analog signal into digital samples. The detector unit can be easily tiled together to form a CT detector. Experiments were conducted to characterize the detector performance both at the single unit level and system level. The noise level, linearity and uniformity of the proposed detector unit were reported and initial imaging studies were also presented which demonstrated the potential application of the proposed detector unit in actual CT scanners.<\/jats:p>","DOI":"10.3390\/s130405167","type":"journal-article","created":{"date-parts":[[2013,4,18]],"date-time":"2013-04-18T11:45:04Z","timestamp":1366285504000},"page":"5167-5180","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Performance Evaluation of a Modular Detector Unit for X-Ray Computed Tomography"],"prefix":"10.3390","volume":"13","author":[{"given":"Zhe","family":"Guo","sequence":"first","affiliation":[{"name":"Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhiwei","family":"Tang","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xinzeng","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mingliang","family":"Deng","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guangshu","family":"Hu","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hui","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2013,4,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"R29","DOI":"10.1088\/0031-9155\/51\/13\/R03","article-title":"X-Ray Computed Tomography","volume":"51","author":"Willi","year":"2006","journal-title":"Phys. Med. Biol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2277","DOI":"10.1056\/NEJMra072149","article-title":"Computed Tomography\u2014An Increasing Source of Radiation Exposure","volume":"357","author":"Brenner","year":"2007","journal-title":"New Engl. J. Med."},{"key":"ref_3","unstructured":"AnalogDevice Available online:http:\/\/www.analog.com\/en\/analog-to-digital-converters\/ad-converters\/adas1128\/products\/product.html."},{"key":"ref_4","unstructured":"Marple, S.L. (1989, January 23\u201326). A Tutorial Overview of Modern Spectral Estimation. Glasgow, UK."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1023","DOI":"10.1109\/TCOM.1976.1093409","article-title":"A Fast Karhunen-Loeve Transform for a Class of Random Processes","volume":"24","author":"Jain","year":"1976","journal-title":"IEEE Trans. Commun."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Najim, M. (2008). Modeling, Estimation and Optimal Filtering in Signal Processing, John Wiley & Sons, Inc.","DOI":"10.1002\/9780470611104"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Lawson, C.L., and Hanson, R.J. (1995). Solving Least Squares Problems, Society for Industrial and Applied Mathematics.","DOI":"10.1137\/1.9781611971217"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/13\/4\/5167\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T21:46:13Z","timestamp":1760219173000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/13\/4\/5167"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2013,4,18]]},"references-count":7,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2013,4]]}},"alternative-id":["s130405167"],"URL":"https:\/\/doi.org\/10.3390\/s130405167","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2013,4,18]]}}}