{"id":2868,"date":"2020-11-25T11:36:26","date_gmt":"2020-11-25T11:36:26","guid":{"rendered":"http:\/\/www.finden.co.uk\/?p=2868"},"modified":"2020-11-25T13:05:00","modified_gmt":"2020-11-25T13:05:00","slug":"new-solution-to-the-parallax-problem-in-x-ray-scattering-diffraction-experiments","status":"publish","type":"post","link":"https:\/\/www.finden.co.uk\/zh\/news\/new-solution-to-the-parallax-problem-in-x-ray-scattering-diffraction-experiments\/","title":{"rendered":"New solution to the parallax problem in X-ray scattering\/diffraction experiments"},"content":{"rendered":"<p><a href=\"http:\/\/www.finden.co.uk\/wp-content\/uploads\/2020\/11\/parraleximage.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-medium wp-image-2869\" src=\"http:\/\/www.finden.co.uk\/wp-content\/uploads\/2020\/11\/parraleximage-300x137.jpg\" alt=\"parallax solution with x-ray paper abstract graphic\" width=\"300\" height=\"137\" srcset=\"https:\/\/www.finden.co.uk\/wp-content\/uploads\/2020\/11\/parraleximage-300x137.jpg 300w, https:\/\/www.finden.co.uk\/wp-content\/uploads\/2020\/11\/parraleximage-1030x469.jpg 1030w, https:\/\/www.finden.co.uk\/wp-content\/uploads\/2020\/11\/parraleximage-768x350.jpg 768w, https:\/\/www.finden.co.uk\/wp-content\/uploads\/2020\/11\/parraleximage-1536x700.jpg 1536w, https:\/\/www.finden.co.uk\/wp-content\/uploads\/2020\/11\/parraleximage-1500x683.jpg 1500w, https:\/\/www.finden.co.uk\/wp-content\/uploads\/2020\/11\/parraleximage-705x321.jpg 705w, https:\/\/www.finden.co.uk\/wp-content\/uploads\/2020\/11\/parraleximage.jpg 1800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>Our scientists\u2019 new work on finding a solution to the parallax problem in X-ray scattering\/diffraction experiments has been published in a new paper, &#8220;<a href=\"https:\/\/doi.org\/10.1107\/S1600576720013576\" target=\"_blank\" rel=\"noopener noreferrer\"><em>DLSR: a solution to the parallax artefact in X\u2010ray diffraction computed tomography data<\/em><\/a>,&#8221; published in the <span class=\"jicon_logotitle\">Journal of Applied\u00a0Crystallography.<\/span><\/p>\n<p>The work was performed in collaboration with the creator of the TOPAS software Alan Coelho, DESY, UCL Chemistry, ESRF and SciML.<\/p>\n<p>A new tomographic reconstruction algorithm is presented, termed direct least\u2010squares reconstruction (DLSR), which solves the well known parallax problem in X\u2010ray\u2010scattering\u2010based experiments. The parallax artefact arises from relatively large samples where X\u2010rays, scattered from a scattering angle 2g\u03b8, arrive at multiple detector elements. This phenomenon leads to loss of physico\u2010chemical information associated with diffraction peak shape and position (<i>i.e.<\/i> altering the calculated crystallite size and lattice parameter values, respectively) and is currently the major barrier to investigating samples and devices at the centimetre level (scale\u2010up problem). The accuracy of the DLSR algorithm has been tested against simulated and experimental X\u2010ray diffraction computed tomography data using the <i>TOPAS<\/i> software.<\/p>\n<p>This will allow upscaling chemical tomography techniques to study large samples.<\/p>\n<p>Read the full article at <a href=\"https:\/\/doi.org\/10.1107\/S1600576720013576\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/doi.org\/10.1107\/S1600576720013576<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Our scientists\u2019 new work on finding a solution to the parallax problem in X-ray scattering\/diffraction experiments has been published in a new paper, &#8220;DLSR: a solution to the parallax artefact in X\u2010ray diffraction computed tomography data,&#8221; published in the Journal of Applied\u00a0Crystallography. The work was performed in collaboration with the creator of the TOPAS software [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[15],"tags":[23,65,64,48],"class_list":["post-2868","post","type-post","status-publish","format-standard","hentry","category-news","tag-diffraction-imaging","tag-parallex-problem","tag-x-ray-scattering","tag-x-rays"],"_links":{"self":[{"href":"https:\/\/www.finden.co.uk\/zh\/wp-json\/wp\/v2\/posts\/2868","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.finden.co.uk\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.finden.co.uk\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.finden.co.uk\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.finden.co.uk\/zh\/wp-json\/wp\/v2\/comments?post=2868"}],"version-history":[{"count":10,"href":"https:\/\/www.finden.co.uk\/zh\/wp-json\/wp\/v2\/posts\/2868\/revisions"}],"predecessor-version":[{"id":2886,"href":"https:\/\/www.finden.co.uk\/zh\/wp-json\/wp\/v2\/posts\/2868\/revisions\/2886"}],"wp:attachment":[{"href":"https:\/\/www.finden.co.uk\/zh\/wp-json\/wp\/v2\/media?parent=2868"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.finden.co.uk\/zh\/wp-json\/wp\/v2\/categories?post=2868"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.finden.co.uk\/zh\/wp-json\/wp\/v2\/tags?post=2868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}