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Positron Emission Tomography Reveals Vascular Microcalcifications

By MedImaging International staff writers
Posted on 26 Oct 2015
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Image: Electron microscope images of plaque calcification stages (Image courtesy of University of Cambridge).
Image: Electron microscope images of plaque calcification stages (Image courtesy of University of Cambridge).
A new study reveals how a combination of positron emission tomography and computed tomography (PET/CT) can identify calcified deposits in the vasculature.

Researchers at the University of Cambridge (United Kingdom) and the University of Edinburgh (United Kingdom) used a radiotracer version of sodium fluoride (18F-NaF) to try and to identify the process by which microcalcifications are formed in the blood vessels and build up into atherosclerotic plaque. To do so, they used electron microscopy, histology, autoradiography, and preclinical and clinical PET/CT to analyze how sodium fluoride builds up and binds to active, unstable calcium deposits.

The researchers succeeded in showing that sodium fluoride adsorbs to calcified deposits within atherosclerotic plaque with high affinity, and is selective and specific. Using the radioactive (18)F-NaF tracer, PET/CT imaging can even distinguish between areas of macro- and micro-calcification in active unstable atherosclerosis, and could thus potentially help foster new approaches to developing treatments for vascular calcification. The study was published on July 7, 2015, in Nature Communications.

“Sodium fluoride is commonly found in toothpaste as it binds to calcium compounds in our teeth's enamel. In a similar way, it also binds to unstable areas of calcification in arteries and so we're able to see, by measuring the levels of radioactivity, exactly where the deposits are building up,” said senior author Anthony Davenport, MD, of the department of medicine at Cambridge. “This new emerging technique is the only imaging platform that can noninvasively detect the early stages of calcification in unstable atherosclerosis.”

“18F-NaF is a simple and inexpensive tracer that should revolutionize the ability of doctors to detect dangerous calcium deposits in the arteries of the heart and brain,” added coauthor cardiologist James Rudd, MD. “This will allow us to use current treatments more effectively, by giving them to those patients at highest risk. In addition, after further work, it may be possible to use this technique to test how well new medicines perform at preventing the development of atherosclerosis.”

Calcification in atherosclerotic plaque is a complex process that exhibits similarities to new bone formation, representing a confluence of bone biology and chronic plaque inflammation. Since the rate of calcification is a surrogate measure for atherosclerosis progression, noninvasive detection of calcium could serve as a useful risk stratification tool.

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99 (25.98762512207): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (25.98762512207): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (25.98762512207): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (45.061111450195): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (99.897384643555): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
105 (48.160552978516): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
106 (65.088272094727): 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=294761024 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (64.13459777832): 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=294761024 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (!!!!! 5973.8159179688): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
109 (156.16416931152): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
110 (72.956085205078): 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=294761024 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (560.99891662598): 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=294761024 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (688.07601928711): 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 (437.02125549316): 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 (102.99682617188): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
115 (124.93133544922): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
116 (66.995620727539): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
117 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
118 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
119 (67.949295043945): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
120 (426.05400085449): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
121 (!!!!! 84351.062774658): 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 (83.92333984375): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
123 (142.09747314453): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
124 (!!!!! 2907.9914093018): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294761024 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294761024 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 1301985.0254059): ( 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 (101.80473327637): ( 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 (45.7763671875): 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 (33.140182495117): 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 (40.769577026367): 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 (31.948089599609): 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 (31.948089599609): 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 (74.863433837891): 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 (699.99694824219): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
134 (669.00253295898): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
135 (69.141387939453): SELECT name FROM jos_deeppockets WHERE id=213
136 (50.067901611328): SELECT name FROM jos_deeppockets WHERE id=213
137 (705.95741271973): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
138 (602.00691223145): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))213((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
139 (130.89179992676): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
140 (87.02278137207): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
141 (!!!!! 10961.055755615): TRUNCATE TABLE jos_trademed_module
142 (103.95050048828): 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=294761024 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
143 (53.882598876953): 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=294761024 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
144 (664.94941711426): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
145 (78.916549682617): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
146 (83.92333984375): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
147 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
148 (!!!!! 1733.0646514893): 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 (72.956085205078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
150 (62.227249145508): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
151 (90.837478637695): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294761024 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294761024 AND type='deeppockets_item' AND published='1' LIMIT 1
152 (58.889389038086): 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 (72.002410888672): 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 (72.956085205078): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
155 (113.96408081055): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
156 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294761024 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294761024 AND published='1' LIMIT 1
157 (53.167343139648): select jos_twitters.link from jos_twitters where cat=10
158 (34.093856811523): select jos_facebook.link from jos_facebook where cat=10
159 (31.948089599609): select jos_google_plus.link from jos_google_plus where cat=10
160 (33.855438232422): select jos_linkedin.link from jos_linkedin where cat=10
161 (272.03559875488): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
162 (!!!!! 1569.0326690674): insert into jos_banners_delta values (14615,'2025-05-01 19:09:05','52.15.244.228','view'),(14202,'2025-05-01 19:09:05','52.15.244.228','view'),(14203,'2025-05-01 19:09:05','52.15.244.228','view')