Editing CT scan (section)

===Aviation security===
CT scanning has also found an application in transport security (predominantly [[airport security]]) where it is currently used in a materials analysis context for explosives detection [[CTX (explosive-detection device)]]<ref>{{Cite book |last1=P. Babaheidarian |title=Anomaly Detection and Imaging with X-Rays (ADIX) III |last2=D. Castanon |editor-first1=Joel A. |editor-first2=Michael E. |editor-first3=Mark A. |editor-first4=Amit |editor-last1=Greenberg |editor-last2=Gehm |editor-last3=Neifeld |editor-last4=Ashok |date=2018 |isbn=978-1-5106-1775-9 |pages=12 |chapter=Joint reconstruction and material classification in spectral CT |doi=10.1117/12.2309663 |s2cid=65469251}}</ref><ref name="jin12securityct">{{Cite book |last1=P. Jin |title=Second International Conference on Image Formation in X-Ray Computed Tomography |last2=E. Haneda |last3=K. D. Sauer |last4=C. A. Bouman |date=June 2012 |chapter=A model-based 3D multi-slice helical CT reconstruction algorithm for transportation security application |access-date=2015-04-05 |chapter-url=https://engineering.purdue.edu/~bouman/publications/orig-pdf/CT-2012a.pdf |archive-url=https://web.archive.org/web/20150411000659/https://engineering.purdue.edu/~bouman/publications/orig-pdf/CT-2012a.pdf |archive-date=2015-04-11 |url-status=dead}}</ref><ref name="jin12securityctprior">{{Cite book |last1=P. Jin |title=Signals, Systems and Computers (ASILOMAR), 2012 Conference Record of the Forty Sixth Asilomar Conference on |last2=E. Haneda |last3=C. A. Bouman |date=November 2012 |publisher=IEEE |pages=613–636 |chapter=Implicit Gibbs prior models for tomographic reconstruction |access-date=2015-04-05 |chapter-url=https://engineering.purdue.edu/~bouman/publications/pdf/Asilomar-2012-Pengchong.pdf |archive-url=https://web.archive.org/web/20150411025559/https://engineering.purdue.edu/~bouman/publications/pdf/Asilomar-2012-Pengchong.pdf |archive-date=2015-04-11 |url-status=dead}}</ref><ref name="kisner13securityct">{{Cite book |last1=S. J. Kisner |title=Security Technology (ICCST), 2013 47th International Carnahan Conference on |last2=P. Jin |last3=C. A. Bouman |last4=K. D. Sauer |last5=W. Garms |last6=T. Gable |last7=S. Oh |last8=M. Merzbacher |last9=S. Skatter |date=October 2013 |publisher=IEEE |chapter=Innovative data weighting for iterative reconstruction in a helical CT security baggage scanner |access-date=2015-04-05 |chapter-url=https://engineering.purdue.edu/~bouman/publications/pdf/iccst2013.pdf |archive-url=https://web.archive.org/web/20150410234541/https://engineering.purdue.edu/~bouman/publications/pdf/iccst2013.pdf |archive-date=2015-04-10 |url-status=dead}}</ref> and is also under consideration for automated baggage/parcel security scanning using [[computer vision]] based object recognition algorithms that target the detection of specific threat items based on 3D appearance (e.g. guns, knives, liquid containers).<ref name="megherbi10baggage">{{Cite book |last1=Megherbi, N. |title=Proc. International Conference on Image Processing |last2=Flitton, G.T. |last3=Breckon, T.P. |date=September 2010 |publisher=IEEE |isbn=978-1-4244-7992-4 |pages=1833–1836 |chapter=A Classifier based Approach for the Detection of Potential Threats in CT based Baggage Screening |citeseerx=10.1.1.188.5206 |doi=10.1109/ICIP.2010.5653676 |access-date=5 November 2013 |chapter-url=http://www.durham.ac.uk/toby.breckon/publications/papers/megherbi10baggage.pdf |s2cid=3679917 }}{{Dead link|date=November 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref name="megherbi12baggage">{{Cite book |last1=Megherbi, N. |title=Proc. International Conference on Image Processing |last2=Han, J. |last3=Flitton, G.T. |last4=Breckon, T.P. |date=September 2012 |publisher=IEEE |isbn=978-1-4673-2533-2 |pages=3109–3112 |chapter=A Comparison of Classification Approaches for Threat Detection in CT based Baggage Screening |citeseerx=10.1.1.391.2695 |doi=10.1109/ICIP.2012.6467558 |access-date=5 November 2013 |chapter-url=http://www.durham.ac.uk/toby.breckon/publications/papers/megherbi12baggage.pdf |s2cid=6924816 }}{{Dead link|date=November 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref name="flitton13interestpoint">{{Cite journal |last1=Flitton, G.T. |last2=Breckon, T.P. |last3=Megherbi, N. |date=September 2013 |title=A Comparison of 3D Interest Point Descriptors with Application to Airport Baggage Object Detection in Complex CT Imagery |url=http://www.durham.ac.uk/toby.breckon/publications/papers/flitton13interestpoint.pdf |journal=Pattern Recognition |volume=46 |pages=2420–2436 |bibcode=2013PatRe..46.2420F |doi=10.1016/j.patcog.2013.02.008 |access-date=5 November 2013 |number=9 |hdl=1826/15213 |s2cid=3687379 }}{{Dead link|date=November 2023 |bot=InternetArchiveBot |fix-attempted=yes}}</ref> Its usage in airport security pioneered at [[Shannon Airport]] in March 2022 has ended the ban on liquids over 100&nbsp;ml there, a move that [[Heathrow Airport]] plans for a full roll-out on 1 December 2022 and the TSA spent $781.2 million on an order for over 1,000 scanners, ready to go live in the summer.