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Combining PET and MRI to Visualize Development of Alzheimer’s Disease

By MedImaging International staff writers
Posted on 25 Nov 2014
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Image: MRI and PET scans of a patient with dementia (Photo courtesy of Dr. Paul Edison, neurology imaging unit, Imperial College London’s Imanova  International Translational Imaging Center).
Image: MRI and PET scans of a patient with dementia (Photo courtesy of Dr. Paul Edison, neurology imaging unit, Imperial College London’s Imanova International Translational Imaging Center).
Neuroscientists are seeking new strategies for developing better treatments for Alzheimer’s disease (AD). However, it is just as important to find useful procedures to evaluate the probability of new treatments succeeding. German researchers have combined two noninvasive imaging techniques, positron emission tomography (PET) and magnetic resonance imaging (MRI), to help them to examine the proteinaceous deposits typical of AD in transgenic mice.

The project was headed by Prof. Bernd Pichler of the Werner Siemens Imaging Center at Tübingen University’s (Germany) department of preclinical imaging and radiopharmacy. The study’s findings were published online November 10, 2014, in the journal Nature Medicine. The genetically-modified mice developed a disease that corresponds to AD in humans. The researchers were able to track the formation of amyloid plaques over the entire lifetime of the animals and to observe the disease’s development. They were also able to validate a direct connection between the formation of amyloid plaques in cerebral blood vessels with a reduced blood flow in specific regions of the brain.

The researchers examined two different lines of genetically-modified mice. In one mouse strain, amyloid plaques formed almost totally in the brain tissue, while in the other, they formed both in the brain tissue and in the cerebral vessels. “Only in the latter mice did we see the typical Alzheimer symptom of reduced blood flow in certain areas of the brain,” said Dr. Florian Maier of the Werner Siemens Imaging Center, the study’s lead author. “Our data show that the amyloid plaque buildup in the cerebral vessels is the main factor behind the disruption of blood flow,” he commented.

Scientists, for the first time, were able to obtain a high enough quality of images of live animals’ brains to allow the scientists to monitor the dynamics of the disease’s development spatially and temporally, and also to measure it quantitatively. The researchers were able to make greater use of the potential of PET and MRI by calibrating their parallel measurements. The researchers reported that this noninvasive technique could be used on human patients as well.

“We have laid the groundwork for better diagnostics, especially when it comes to distinguishing Alzheimer's-related dementia from other diseases,” said Prof. Pichler. Moreover, the study once more reveals that the formation of beta-amyloid plaques is a key factor in AD. “It would make sense to develop new treatment strategies which reduce or prevent plaque formation,” he concluded.

On another front of AD research using PET and MRI technology, a scanner will be installed within the Imanova facility on the Hammersmith campus of Imperial College London (UK). It will be one of five new MRI-PET scanners that have been funded as part of the MRC’s Dementias Platform UK (DPUK) award for clinical research infrastructure. The Imperial College London bid for the award that was developed as a collaboration with Imanova, in an alliance between the MRC and three of London’s leading Higher Education Institutes: Imperial College London, King’s College London and University College London. The award will provide GBP 5.6 million to install a state-of-the-art MRI-PET scanner together with specialized radiochemical equipment which will allow distribution of novel PET tracers to other centers in the network.

Kevin Cox, CEO of Imanova, said, “We are delighted to be collaborating with Imperial on this novel initiative. The combination of Imperial’s clinical expertise and our knowledge of imaging will ensure the DPUK get full value out of this investment, providing a real opportunity to advance treatments for dementia.”

Related Links:

Werner Siemens Imaging Center at Tübingen University
Imperial College London’s Imanova International Translational Imaging Center

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89 (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`
90 (49.114227294922): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (29.087066650391): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (24.795532226562): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (25.98762512207): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (71.048736572266): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (29.087066650391): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (24.080276489258): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (84.877014160156): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
105 (43.869018554688): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
106 (96.08268737793): 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=294755870 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (44.107437133789): 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=294755870 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (!!!!! 3875.9708404541): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
109 (88.930130004883): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
110 (51.975250244141): 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=294755870 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (391.00646972656): 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=294755870 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (638.96179199219): 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
113 (394.10591125488): 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
114 (123.02398681641): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
115 (72.956085205078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
116 (118.01719665527): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
117 (38.862228393555): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
118 (144.95849609375): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
119 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
120 (277.04238891602): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
121 (!!!!! 70770.025253296): 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
122 (88.214874267578): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
123 (72.956085205078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
124 (!!!!! 2022.0279693604): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294755870 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294755870 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 569245.10002136): ( 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
126 (!!!!! 486237.04910278): ( 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
127 (!!!!! 5290.9851074219): 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
128 (46.014785766602): 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
129 (46.014785766602): 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
130 (33.140182495117): 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
131 (33.855438232422): 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
132 (56.982040405273): 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
133 (388.86070251465): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
134 (379.08554077148): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
135 (170.94612121582): SELECT name FROM jos_deeppockets WHERE id=213
136 (66.041946411133): SELECT name FROM jos_deeppockets WHERE id=213
137 (413.17939758301): 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 '((;)|(^))213((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
138 (398.15902709961): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))213((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
139 (61.988830566406): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
140 (44.822692871094): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
141 (!!!!! 9695.0531005859): TRUNCATE TABLE jos_trademed_module
142 (219.10667419434): 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=294755870 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
143 (232.93495178223): 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=294755870 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
144 (905.03692626953): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
145 (144.95849609375): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
146 (442.9817199707): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
147 (!!!!! 1809.1201782227): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
148 (!!!!! 2429.0084838867): 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
149 (464.20097351074): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
150 (77.962875366211): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
151 (437.02125549316): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294755870 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294755870 AND type='deeppockets_item' AND published='1' LIMIT 1
152 (765.08522033691): 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=213 or channel_id is null)
153 (225.06713867188): 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=213 or channel_id is null)
154 (336.88545227051): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
155 (!!!!! 1873.9700317383): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
156 (82.969665527344): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755870 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755870 AND published='1' LIMIT 1
157 (409.84153747559): select jos_twitters.link from jos_twitters where cat=10
158 (42.915344238281): select jos_facebook.link from jos_facebook where cat=10
159 (664.94941711426): select jos_google_plus.link from jos_google_plus where cat=10
160 (50.067901611328): select jos_linkedin.link from jos_linkedin where cat=10
161 (663.99574279785): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
162 (!!!!! 6340.0268554688): insert into jos_banners_delta values (14615,'2025-05-02 09:47:29','3.149.10.88','view'),(14202,'2025-05-02 09:47:29','3.149.10.88','view'),(14203,'2025-05-02 09:47:29','3.149.10.88','view')