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Novel Micro-Computed Tomography (Micro-CT) Imaging Method Could Significantly Reduce Scan Times

By MedImaging International staff writers
Posted on 17 Mar 2022

Micro-computed tomography (micro-CT) is an imaging method based on X-ray images which are reconstructed to form a three-dimensional image of the internal structure of samples with small dimensions. Researchers in biomedical physics and biology have significantly improved micro-CT, more specifically imaging with phase contrast and high brilliance X-ray radiation.

Researchers at the Technical University of Munich (TUM, Bavaria, Germany) have developed a new microstructured optical grating and combined it with new analytical algorithms. The new approach makes it possible to depict and analyze the microstructures of samples in greater detail, and to investigate a particularly broad spectrum of samples. Researchers in biology, medicine or material sciences can use this method to obtain information on the structure and characteristics of tissue and material samples which are important in diagnoses and other analyses.

X-ray imaging with phase contrast is particularly well-suited for investigating soft tissue. The method employs the refraction of the X-rays caused by the sample's structures in order to obtain contrast for these structures and thus to depict soft tissue in greater detail than it is possible with conventional X-ray methods. In many phase-contrast methods, optical components modulate the X-rays on their way to the detector, resulting in what is referred to as a diffraction pattern at the detector. Until now inefficient structures such as sandpaper and absorption masks have been used for this type of modulation, but in the meantime a variety of optical gratings are available.

TUM researchers have now introduced a new method for micro-CT with phase contrast using high-brilliance X-ray radiation. The technology is based on a newly developed optical grating referred to as a Talbot Array Illuminator. This new optical element is comparatively easy to produce, is resilient to X-ray radiation and can be used with different energies. This establishes the technically necessary prerequisites for high contrast. The new method enables more efficient use of the radiation dose than with ordinary modulators such as sandpaper and significantly reduces scan times.

The new technology can be used to investigate a particularly broad spectrum of samples. Researchers can even simultaneously depict materials of greatly differing compositions, for example water and oil embedded in stone, which was not possible in the past using conventional methods. This provides crucial advantages over conventional methods not only in medicine and biology, but also opens up new application possibilities in material sciences, for example in geology.

“By combining our newly developed Talbot Array Illuminator with new analysis software optimized for the purpose, we've been able to significantly improve imaging and analysis with micro-CT,” said Julia Herzen, professor of Biomedical Imaging Physics at TUM. “The new technology is more sensitive than comparable methods in this field. At very high resolutions, it allows to depict soft tissue with higher contrast than previously. High sensitivity is particularly important for example in order to detect fine differences within soft tissue.”

"In contrast to previous approaches, our new method also makes quantitative analysis possible. We can make and compare absolute measurements of the electron density of samples, without the need for any assumptions about the samples," added Prof. Herzen.

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Technical University of Munich 

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87 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
88 (25.98762512207): SELECT show_live FROM jos_com_show_setting LIMIT 1
89 (25.98762512207): SELECT show_live FROM jos_com_show_setting LIMIT 1
90 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (24.795532226562): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (25.98762512207): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (70.095062255859): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294792044 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
94 (30.040740966797): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294792044 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
95 (31.948089599609): SELECT id,name,title FROM jos_deeppockets WHERE cat=10 AND TYPE='file_folder' AND published=1 AND id != 294743300 AND id != 294743301 AND id != 294743302 AND id != 294743303 AND id != 294743304 AND id != 294743305 AND id != 294743306 AND id != 294743307 AND id != 294743308 AND id != 294743309 AND id != 294743310 AND metakey != 'aacc' ORDER BY `ordering`
96 (72.002410888672): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (42.200088500977): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (39.100646972656): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (38.862228393555): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (54.836273193359): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (41.007995605469): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (41.961669921875): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (38.14697265625): SELECT show_live FROM jos_com_show_setting LIMIT 1
105 (37.193298339844): SELECT show_live FROM jos_com_show_setting LIMIT 1
106 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
107 (34.093856811523): SELECT show_live FROM jos_com_show_setting LIMIT 1
108 (74.863433837891): SELECT show_live FROM jos_com_show_setting LIMIT 1
109 (38.862228393555): SELECT show_live FROM jos_com_show_setting LIMIT 1
110 (92.029571533203): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
111 (69.141387939453): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
112 (80.82389831543): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294792044 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
113 (66.995620727539): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294792044 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
114 (92.983245849609): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
115 (57.93571472168): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
116 (407.21893310547): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=294792044 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
117 (385.99967956543): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=294792044 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
118 (68.902969360352): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=294792029 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
119 (358.10470581055): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=294792029 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
120 (665.18783569336): SELECT dp.name, dp.id, dp2.name as channel, ex.name as author_name, ex.specialization, ex.images FROM jos_deeppockets as dp LEFT JOIN jos_experts as ex ON ex.id = dp.author LEFT JOIN jos_deeppockets as dp2 ON dp2.id = dp.fid WHERE dp.author != 0 AND dp.cat = 10 AND dp.published = 1 AND ( (dp.fid = 294743300) OR (dp.fid = 294743301) OR (dp.fid = 294743302) OR (dp.fid = 294743303) OR (dp.fid = 294743304) OR (dp.fid = 294743305) OR (dp.fid = 294743306) OR (dp.fid = 294743307) OR (dp.fid = 294743308) OR (dp.fid = 294743309) OR (dp.fid = 294743310) ) ORDER BY RAND() LIMIT 1
121 (426.05400085449): SELECT dp.name, dp.id, dp2.name as channel, ex.name as author_name, ex.specialization, ex.images FROM jos_deeppockets as dp LEFT JOIN jos_experts as ex ON ex.id = dp.author LEFT JOIN jos_deeppockets as dp2 ON dp2.id = dp.fid WHERE dp.author != 0 AND dp.cat = 10 AND dp.published = 1 AND ( (dp.fid = 294743300) OR (dp.fid = 294743301) OR (dp.fid = 294743302) OR (dp.fid = 294743303) OR (dp.fid = 294743304) OR (dp.fid = 294743305) OR (dp.fid = 294743306) OR (dp.fid = 294743307) OR (dp.fid = 294743308) OR (dp.fid = 294743309) OR (dp.fid = 294743310) ) ORDER BY RAND() LIMIT 1
122 (90.837478637695): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
123 (50.067901611328): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
124 (105.14259338379): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
125 (37.908554077148): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
126 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
127 (37.908554077148): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
128 (297.06954956055): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
129 (!!!!! 20886.182785034): SELECT * FROM jos_deeppockets WHERE jos_deeppockets.cat = 10 AND jos_deeppockets.type = 'deeppockets_item' AND jos_deeppockets.published = 1 AND jos_deeppockets.created + INTERVAL 14 DAY >= NOW() ORDER BY jos_deeppockets.hits DESC LIMIT 7
130 (119.92454528809): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
131 (48.87580871582): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
132 (535.96496582031): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294792044 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294792044 AND type='deeppockets_item' AND published='1' LIMIT 1
133 (!!!!! 466198.92120361): ( SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.video != '' AND dp.video_source != '' AND dp.cat = 10 AND dp.published = 1 AND dp.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) UNION ( SELECT dpa.id, dpa.name, dpa.title, dpa.video, dpa.video_source, dpa.created FROM jos_deeppockets_archive AS dpa WHERE dpa.video != '' AND dpa.video_source != '' AND dpa.cat = 10 AND dpa.published = 1 AND dpa.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) ORDER BY created DESC LIMIT 3
134 (73.909759521484): ( SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.video != '' AND dp.video_source != '' AND dp.cat = 10 AND dp.published = 1 AND dp.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) UNION ( SELECT dpa.id, dpa.name, dpa.title, dpa.video, dpa.video_source, dpa.created FROM jos_deeppockets_archive AS dpa WHERE dpa.video != '' AND dpa.video_source != '' AND dpa.cat = 10 AND dpa.published = 1 AND dpa.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) ORDER BY created DESC LIMIT 3
135 (322.10350036621): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800513 LIMIT 1
136 (37.908554077148): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800513 LIMIT 1
137 (257.01522827148): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800359 LIMIT 1
138 (36.001205444336): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800359 LIMIT 1
139 (195.98007202148): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800361 LIMIT 1
140 (32.901763916016): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800361 LIMIT 1
141 (463.96255493164): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
142 (349.99847412109): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
143 (191.92695617676): SELECT name FROM jos_deeppockets WHERE id=211
144 (33.855438232422): SELECT name FROM jos_deeppockets WHERE id=211
145 (459.90943908691): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))211((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
146 (426.05400085449): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))211((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
147 (55.074691772461): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
148 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
149 (!!!!! 8448.1239318848): TRUNCATE TABLE jos_trademed_module
150 (138.0443572998): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294792044 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
151 (70.095062255859): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294792044 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
152 (738.14392089844): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
153 (66.995620727539): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
154 (57.93571472168): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
155 (44.107437133789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
156 (!!!!! 2607.1071624756): SELECT jos_item.* FROM jos_item INNER JOIN jos_number ON jos_item.numberID=jos_number.id WHERE 1=1 AND (jos_item.imgMini<>'') AND jos_item.type='L' AND jos_item.numberID= ( SELECT jos_number.id FROM jos_number WHERE jos_number.journalID IN (10) and jos_number.id in (select distinct jos_number.id from jos_number join jos_item on jos_item.numberid=jos_number.id where jos_item.type='P') ORDER BY (CONVERT(SUBSTRING(issue,1,2),SIGNED) + (CONVERT(SUBSTRING(issue,3,2),SIGNED)*100)) DESC LIMIT 0,1 ) ORDER BY RAND() DESC LIMIT 6
157 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
158 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
159 (46.968460083008): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294792044 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294792044 AND type='deeppockets_item' AND published='1' LIMIT 1
160 (588.89389038086): select distinct links.* from jos_textlinks links join jos_textlinks_placement placement on links.id=placement.link_id where journal_id=(10) and (channel_id=0 or channel_id is null)
161 (42.915344238281): select distinct links.* from jos_textlinks links join jos_textlinks_placement placement on links.id=placement.link_id where journal_id=(10) and (channel_id=0 or channel_id is null)
162 (47.922134399414): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
163 (130.89179992676): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
164 (48.87580871582): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294792044 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294792044 AND published='1' LIMIT 1
165 (147.81951904297): select jos_twitters.link from jos_twitters where cat=10
166 (42.200088500977): select jos_facebook.link from jos_facebook where cat=10
167 (38.14697265625): select jos_google_plus.link from jos_google_plus where cat=10
168 (32.901763916016): select jos_linkedin.link from jos_linkedin where cat=10
169 (322.10350036621): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
170 (!!!!! 1717.0906066895): insert into jos_banners_delta values (14615,'2025-05-01 09:36:06','18.191.5.237','view'),(14202,'2025-05-01 09:36:06','18.191.5.237','view'),(14203,'2025-05-01 09:36:06','18.191.5.237','view')