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Magnetoencephalography/MRI Combo Offers Real-time Clues into Brain Functioning

By MedImaging International staff writers
Posted on 19 Mar 2014
Combining magnetic resonance imagining (MRI) for visualizing body structures and magnetoencephalography (MEG) for seeing activity mechanisms may better determine of how the human brain functions.

New advances related to new uses of imaging technologies could help scientists uncover new clues into the brain’s processes. Now, European scientists have effectively combined MRI scanning with the emerging imaging technology known as MEG. Researchers have bundled the two ways of imaging the brain in one helmet-like device. Because MEG records the magnetic fields generated by the brain, as brain cells fire off messages to one another, it provides scientists with a real-time insight into the brain as it processes its environment surrounding it. MRI, meanwhile, gives structural images of the brain by looking at blood flow and oxygenation levels. Combining these techniques is precisely what the MEG-MRI project, funded by the European Union (EU), did.

Ultimately, these new imaging developments could help physicians better determine what is occurring in the brains of patients, such as those with epilepsy. Another potential application would be in helping guide brain surgeons away from critical areas of a patient’s brain. It could help visualizing areas of the brain that light up when a patient talks, for example.

“You can look at streams of information as someone is reading or looking at visual images,” explained Risto Ilmoniemi, a professor of biomedical engineering at Aalto University (Finland), and the lead scientist in the project. “MRI gives the location, but not the sequence of when things happen.” For MEG to capture electrical currents, at least 1,000 neurons need to fire. “They are sending signals to each other and there are electrical currents involved, produced by neurons, and these currents can be measured. MEG measures what comes out of the brain, the electromagnetic field generated,” Prof. Ilmoniemi clarified. The MEG machine is formed like a bicycle helmet, but contains hundreds of sensors inside.

Other scientists have previously been using MEG, and separately followed up using functional MRI (fMRI) scanning. This modality gauges brain activity related to a specific function by identifying associated changes in blood flow. “We use a variety of imaging techniques for the brain, but I prefer to use MEG for a number of reasons,” said Thomas Elbert, professor of neuropsychology at the University of Konstanz (Germany). “First of all, the brain operates much faster than blood oxygen levels would indicate [which is what fMRI detects],” he told the European media company, youris.com (Brussels, Belgium), adding. “Also, fMRI is too slow and too gross when you are looking at activity, it just finds peaks of activities rather than the complex range of mountains.”

Therefore, the full range of peaks and valleys can be better seen through the use of MEG. Clinicians envision real advantages by combining the two imagine techniques. “Doing simultaneous recordings is often very valuable scientifically and clinically: measuring different types of signals at different times means you’re not sure if they’re measures of the same events,” stated Dr. Gregory Miller, a clinical psychologist at University of California, Los Angeles (USA). “When the machines are separate, the patient or research participant has to be removed from the equipment and the procedure repeated, which means the recordings are done under different circumstances. For example, there can be changes due to practice, boredom, or fatigue. Combining MEG and MRI in a single instrument would likely provide cost savings, which means not only saving money but making the technology more widely available. This is particularly important because MEG is severely underutilized, in clinical practice and in research. Second, the combination would greatly reduce the footprint in space-constrained labs and clinics, again making the capabilities available to more scientists, clinicians, and patients. Third, the combination would potentially allow near-simultaneous recordings of very different types of biological signals.”

Dr. Miller noted that MEG is safer than fMRI, provides vastly better temporal resolution than fMRI scanning, and sometimes can image more deeply in the brain than another method, called scalp electroencephalography (EEG). “So, having more access to MEG would let me study fast neural activity in deeper brain structures than I can with fMRI or EEG. This would help us address key issues about brain networks—brain circuitry—in depression, anxiety, and schizophrenia,” Dr. Miller said.

Controversy regarding whether electroencephalography (EEG), MEG, MRI, positron emission tomography (PET) imaging, or optical techniques are typically the best imaging modality is “silly,” according to Dr. Miller. “It’s been common to assume that a scientist has to choose which type of imaging method is best, but that’s like trying to decide whether a hammer or a chisel is better. For some jobs, one is clearly better. For other jobs, you need both.”

The European project has now produced a prototype that combines MEG and MRI. They hope to make improvements and have it suitable for the clinic in four to five years. The new technology should be helpful for patients, physicians, and brain researchers.

Youris dot com is a European Media Center that designs and implements media communication strategies for large research organizations and EU-funded projects.

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83 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
84 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
85 (30.994415283203): SELECT show_live FROM jos_com_show_setting LIMIT 1
86 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
87 (46.014785766602): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294751299 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
88 (31.948089599609): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294751299 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
89 (36.001205444336): 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 (59.127807617188): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (30.994415283203): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (34.093856811523): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (27.179718017578): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (27.179718017578): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (67.949295043945): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
105 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
106 (77.009201049805): 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=294751299 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (51.021575927734): 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=294751299 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (80.108642578125): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
109 (46.968460083008): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 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=294751299 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (462.05520629883): 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=294751299 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (543.83277893066): 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 (331.16340637207): 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 (121.8318939209): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
115 (70.095062255859): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
116 (71.048736572266): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
117 (44.107437133789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
118 (66.995620727539): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
119 (39.815902709961): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
120 (59.127807617188): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
121 (157.11784362793): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
122 (365.01884460449): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 21687.030792236): 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 (730.99136352539): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294751299 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294751299 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 8482.9330444336): ( 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 (79.154968261719): ( 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 (326.87187194824): 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 (54.836273193359): 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 (250.10108947754): 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 (47.206878662109): 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 (244.8558807373): 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 (42.915344238281): 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 (247.00164794922): 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 (59.843063354492): 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 (483.03604125977): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (310.89782714844): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (233.17337036133): SELECT name FROM jos_deeppockets WHERE id=212
138 (82.969665527344): SELECT name FROM jos_deeppockets WHERE id=212
139 (549.0779876709): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (508.06999206543): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (67.949295043945): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
142 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
143 (!!!!! 16778.945922852): TRUNCATE TABLE jos_trademed_module
144 (944.85282897949): 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=294751299 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (95.844268798828): 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=294751299 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (990.86761474609): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (339.98489379883): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (!!!!! 2550.8403778076): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
149 (93.936920166016): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
150 (!!!!! 1740.9324645996): 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 (102.99682617188): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
152 (72.956085205078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
153 (53.167343139648): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294751299 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294751299 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (40.054321289062): 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 (38.14697265625): 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 (47.922134399414): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (!!!!! 1455.0685882568): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
158 (164.03198242188): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294751299 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294751299 AND published='1' LIMIT 1
159 (793.9338684082): select jos_twitters.link from jos_twitters where cat=10
160 (50.067901611328): select jos_facebook.link from jos_facebook where cat=10
161 (31.948089599609): select jos_google_plus.link from jos_google_plus where cat=10
162 (30.994415283203): select jos_linkedin.link from jos_linkedin where cat=10
163 (252.00843811035): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 1626.9683837891): insert into jos_banners_delta values (14615,'2025-06-24 04:23:37','216.73.216.120','view'),(14202,'2025-06-24 04:23:37','216.73.216.120','view'),(14203,'2025-06-24 04:23:37','216.73.216.120','view')