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Improved Insights into Brain Disorders with New CT Method

By MedImaging International staff writers
Posted on 07 Jun 2011
European researchers have developed a new method for making detailed X-ray images of brain cells. More...
The method, called small-angle X-ray-scattering computed tomography (SAXS-CT), can map the myelin sheaths of nerve cells, which are important indicators for disorders such as multiple sclerosis and Alzheimer's disease (AD).

The study's findings have been published in May 2011 in the journal NeuroImage. The myelin sheaths of nerve cells are lamellar membranes surrounding the neuronal axons. Myelin layers are important to the central nervous system as they ensure the rapid and uninterrupted communication of signals along the neuronal axons. Alterations in the myelin layers are linked with a number of neurodegenerative disorders such as cerebral malaria, multiple sclerosis, and AD.

The development of these diseases are still not fully understood, but are thought to be related to the damage of the myelin layers, so that messages from the brain reach the various areas of the body poorly or not at all. It is similar to an electric cord where the insulating components have been damaged and the current short circuits. To find ways to prevent or treat the diseases it is important to understand the connection between the diseases and the changes in the myelin.

"We have combined two well-known medical examination methods: SAXS and CT scanning. Combined with a specially developed program for data processing, we have been able to examine the variations of the myelin sheaths in a rat brain all the way down to the molecular level without surgery," explained Torben Haugaard Jensen, PhD, from the Niels Bohr Institute at the University of Copenhagen (Denmark). The method is known as molecular X-ray CT, because CT is used to examine myelin at the molecular level.

The research has been carried out in collaboration with researchers in Switzerland, France, and Germany. The experiments took place at the Paul Scherrer Institute (Villigen PSI, Switzerland), where they have a powerful X-ray source that can measure SAXS at a high resolution. Typically, such experiments would give two-dimensional X-ray images that are sharp and precise, but without information on depth. But by integrating the method from CT scanning, where you image from different angles, the researchers have managed to capture three-dimensional (3D) X-ray images.

This has not only required the development of new X-ray methods and research, but has also required the development of new methods for processing data. The extremely detailed measurements of cross sections from different angles meant that there were 800,000 images to be analyzed. Therefore, the researchers have also developed an image-processing program for the SAXS-CT technique. The result is that they can see all of the detailed information from SAXS in spatially resolved.

"We can see the myelin sheaths of the neuronal axons and we can distinguish the layers which have a thickness of 17.6 nm," explained Dr. Torben Haugaard Jensen. "Up until now, you had to cut out a little sample in order to examine the layers in one area and get a single measuring point. With the new method, we can examine 250,000 points at once without cutting into the sample. We can get a complete overview over the concentration and thickness of the myelin and this gives of the ability to determine whether the destruction of the myelin is occurring in spots or across the entire sample," he explained.

The research provides new opportunities for collaboration with investigators at Copenhagen University Hospital and the Panum Institute, with whom they already have close contact. The method cannot be used to diagnose living persons. However, the researchers can obtain a new understanding about the diseases, what kind of damage is taking place and where. They will be able to follow the development of the diseases and find out how the brain is being attacked. This knowledge could possibly be used to develop a treatment, according to the researchers.

Related Links:

Niels Bohr Institute at the University of Copenhagen
Paul Scherrer Institute







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80 (34.093856811523): SELECT show_live FROM jos_com_show_setting LIMIT 1
81 (62.942504882812): SELECT show_live FROM jos_com_show_setting LIMIT 1
82 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
83 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
84 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
85 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
86 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
87 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
88 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
89 (76.055526733398): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294735451 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
90 (40.054321289062): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294735451 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
91 (42.915344238281): 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`
92 (76.055526733398): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (44.822692871094): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (42.200088500977): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (41.007995605469): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (45.061111450195): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (38.862228393555): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (41.007995605469): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (39.100646972656): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (39.815902709961): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (39.100646972656): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (39.100646972656): SELECT show_live FROM jos_com_show_setting LIMIT 1
105 (40.054321289062): SELECT show_live FROM jos_com_show_setting LIMIT 1
106 (105.14259338379): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
107 (83.208084106445): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
108 (82.015991210938): 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=294735451 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
109 (72.002410888672): 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=294735451 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
110 (100.13580322266): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
111 (68.187713623047): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
112 (66.041946411133): 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=294735451 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
113 (631.09397888184): 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=294735451 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
114 (647.06802368164): 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
115 (350.9521484375): 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
116 (80.82389831543): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
117 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
118 (46.968460083008): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
119 (77.962875366211): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
120 (50.067901611328): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
121 (36.001205444336): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
122 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
123 (35.04753112793): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
124 (191.92695617676): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
125 (!!!!! 19269.943237305): 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
126 (457.0484161377): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294735451 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294735451 AND type='deeppockets_item' AND published='1' LIMIT 1
127 (!!!!! 7130.8612823486): ( 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
128 (84.877014160156): ( 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
129 (39.100646972656): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803337 LIMIT 1
130 (29.087066650391): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803337 LIMIT 1
131 (60.081481933594): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803276 LIMIT 1
132 (32.901763916016): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803276 LIMIT 1
133 (233.88862609863): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets_archive AS dp WHERE dp.id = 294803276 LIMIT 1
134 (82.969665527344): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets_archive AS dp WHERE dp.id = 294803276 LIMIT 1
135 (39.100646972656): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294802958 LIMIT 1
136 (36.954879760742): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294802958 LIMIT 1
137 (408.88786315918): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
138 (315.90461730957): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
139 (56.982040405273): SELECT name FROM jos_deeppockets WHERE id=211
140 (56.982040405273): SELECT name FROM jos_deeppockets WHERE id=211
141 (825.88195800781): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
142 (681.87713623047): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))211((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
143 (83.92333984375): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
144 (68.187713623047): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
145 (!!!!! 11801.958084106): TRUNCATE TABLE jos_trademed_module
146 (167.1314239502): 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=294735451 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
147 (97.990036010742): 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=294735451 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
148 (548.8395690918): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
149 (64.13459777832): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
150 (64.13459777832): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
151 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
152 (!!!!! 1514.9116516113): 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
153 (97.036361694336): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
154 (68.902969360352): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
155 (68.902969360352): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294735451 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294735451 AND type='deeppockets_item' AND published='1' LIMIT 1
156 (59.843063354492): 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=211 or channel_id is null)
157 (46.014785766602): 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=211 or channel_id is null)
158 (37.908554077148): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
159 (77.009201049805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
160 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294735451 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294735451 AND published='1' LIMIT 1
161 (38.862228393555): select jos_twitters.link from jos_twitters where cat=10
162 (29.802322387695): select jos_facebook.link from jos_facebook where cat=10
163 (31.948089599609): select jos_google_plus.link from jos_google_plus where cat=10
164 (35.04753112793): select jos_linkedin.link from jos_linkedin where cat=10
165 (432.01446533203): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
166 (!!!!! 1574.9931335449): insert into jos_banners_delta values (14615,'2025-08-20 03:16:44','216.73.216.0','view'),(14202,'2025-08-20 03:16:44','216.73.216.0','view'),(14203,'2025-08-20 03:16:44','216.73.216.0','view')