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High Magnetic Field MRI Technology Provides Comprehensive Analysis of Strokes

By MedImaging International staff writers
Posted on 21 Oct 2014
Image: MagLab’s 900 MHz magnet (Photo courtesy of FSU – Florida State University).
Image: MagLab’s 900 MHz magnet (Photo courtesy of FSU – Florida State University).
A new, novel way to categorize the severity of a stroke, help in diagnosis, and assesse potential treatments has been demonstrated by US researchers.

“Stroke affects millions of adults and children worldwide,” said Dr. Sam Grant, researcher and associate professor of chemical and biomedical engineering at the Florida State University-based National High Magnetic Field Laboratory (FAMU-FSU; MagLab; Tallahassee, FL, USA) and the FSU College of Engineering. “This research offers a new technique for the chemical analysis of metabolites during stroke and a means of evaluating dynamic changes in cell processes and size in living tissue.”

The research was described in two articles, one published October 9, 2014, in the journal Nature Communications, and the other published September 10, 2014, in the Journal of Cerebral Blood Flow and Metabolism.

The new technique is a way of narrowly applying energy to the metabolites of a specimen exposed to a very high magnetic field. By selectively “exciting” these metabolites and studying their distribution and confinement in brain tissue, the research team can investigate the metabolic microenvironment and tell whether cells were shrinking or expanding, a vital application for determining the severity of stroke, according to Dr. Grant.

These data could help clinicians to better treat patients. “Strokes cause an interruption of blood and oxygen to flow to the brain,” explained Jens Rosenberg, another MagLab researcher and one of Grant’s coauthors. “Through this research, we can see how neurons and other neural cells respond to the disruption of blood flow after stroke and use that information to better understand the full impacts of stroke.”

The MagLab’s flagship 900 MHz ultra-wide bore nuclear magnetic resonance (NMR) magnet system was a vital element to the research. Utilizing this powerful magnet, the researchers, which included scientists from the Champaulimaud Center (Lisbon, Portugal) and the Weizmann Institute of Science (Rehovot, Israel), were able to capture localized chemical signatures of metabolites from 125-microliter volumes within the brain with high sensitivity and fidelity in six seconds.

Typical magnetic resonance imaging (MRI) scans performed at hospitals or physician offices measure around 1.5–3 Tesla (the unit of magnetic field strength), while the 900 MHz measures an enormous 21.1 Tesla, providing at least seven times the sensitivity. “This very high field, coupled with the RF [radiofrequency] pulse sequence design by our collaborators and homebuilt RF probes offer a unique noninvasive way of evaluating stroke evolution and potential treatments,” Dr. Rosenberg said.

Moreover, the investigators envision exciting possibilities to use this technique to additionally study devastating disorders. “By evaluating spectral regions previously undetectable, we hope to fingerprint certain diseases, like ischemic stroke, so that we can identify new characteristics that are specific to pathological conditions at the metabolic level in vivo,” Dr. Grant said. “There is a lot of work to be done to identify these dynamic changes and decide when and how our treatments can be most effective.”

Additional studies on metabolites using this technique could also be used for analysis of neurological disorders such as dementia, schizophrenia, Lou Gehrig’s, Parkinson’s, Alzheimer’s and Huntington’s diseases.

Related Links:

Florida State University-based National High Magnetic Field Laboratory
Champaulimaud Center 
Weizmann Institute of Science


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93 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (27.179718017578): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (32.186508178711): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
105 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
106 (46.014785766602): 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=294755256 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (46.968460083008): 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=294755256 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
109 (40.054321289062): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
110 (48.160552978516): 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=294755256 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (493.04962158203): 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=294755256 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (518.798828125): 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 (319.9577331543): 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 (80.108642578125): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
115 (55.789947509766): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
116 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
117 (37.908554077148): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
118 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
119 (35.04753112793): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
120 (41.007995605469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
121 (36.001205444336): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
122 (159.97886657715): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 19922.971725464): 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
124 (599.14588928223): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294755256 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294755256 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 8054.0180206299): ( 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 (70.810317993164): ( 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 (36.954879760742): 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
128 (30.994415283203): 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
129 (41.007995605469): 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
130 (28.133392333984): 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
131 (269.88983154297): 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
132 (35.04753112793): 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
133 (30.994415283203): 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
134 (26.941299438477): 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
135 (514.98413085938): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (395.05958557129): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (46.014785766602): SELECT name FROM jos_deeppockets WHERE id=212
138 (29.087066650391): SELECT name FROM jos_deeppockets WHERE id=212
139 (533.8191986084): 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 '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (503.0632019043): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
142 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
143 (!!!!! 8119.1062927246): TRUNCATE TABLE jos_trademed_module
144 (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=294755256 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (56.982040405273): 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=294755256 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (833.98818969727): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (70.095062255859): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (56.028366088867): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
149 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
150 (!!!!! 1211.8816375732): 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
151 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
152 (42.200088500977): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
153 (39.100646972656): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294755256 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294755256 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (34.809112548828): 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=212 or channel_id is null)
155 (31.948089599609): 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=212 or channel_id is null)
156 (33.855438232422): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (119.92454528809): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
158 (96.08268737793): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755256 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755256 AND published='1' LIMIT 1
159 (39.100646972656): select jos_twitters.link from jos_twitters where cat=10
160 (30.994415283203): select jos_facebook.link from jos_facebook where cat=10
161 (32.901763916016): select jos_google_plus.link from jos_google_plus where cat=10
162 (42.200088500977): select jos_linkedin.link from jos_linkedin where cat=10
163 (376.93977355957): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 3163.0992889404): insert into jos_banners_delta values (14615,'2025-06-23 16:06:52','216.73.216.120','view'),(14202,'2025-06-23 16:06:52','216.73.216.120','view'),(14203,'2025-06-23 16:06:52','216.73.216.120','view')