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Quantitative Susceptibility Mapping MRI Useful for Measuring Multiple Sclerosis Progression

By MedImaging International staff writers
Posted on 15 Jan 2014
New imaging research out of Canada has demonstrated that a magnetic resonance imaging (MRI) approach called quantitative susceptibility mapping (QSM) can be an important application for diagnosing and monitoring the progression of multiple sclerosis (MS) and other neurologic disorders. More...


QSM provides a quantitative way to measure myelin content and iron deposition in the brain—important factors in the physiology of MS.

The research led by Ravi Menon, PhD, a scientist at Western University’s Robarts Research Institute (London, ON, Canada), was published in December 31, 2013, Proceedings of the National Academy of Sciences of the United States of America (PNAS). Dr. Menon and his colleagues including first author David Rudko, tried to determine whether QSM was indeed quantitative. Interpretation of QSM data requires the use of a model of the underlying tissue structure. The scientists found that the most common approach to creating QSM images was in fact ineffective to generate quantitative images—that is, images in which myelin content and iron can be measured.

The researchers demonstrated this by studying the orientation dependence of the MRI signal. This particular signal has typically thought to be a constant, but the team showed that it depends on tissue orientation in both cortical gray and white matter, but not in the deep brain structures such as the basal ganglia. All these areas are implicated in MS.

The investigators demonstrated the discordance between the models for QSM using a device that rotated a rat’s brain so that it could be scanned from 18 different angles, using a 9.4 T MRI scanner. The brains were then sent to histology for comparison. They discovered the values depended on the microstructure of the brain such as myelin concentration and integrity, and iron deposition. The study also revealed, for the first time, the correlation between MRI measurement and histology measurement when the correct model was used.

“With this methodology, we now have a quantitative way to interpret myelin and iron concentrations, and in particular, any changes to them over time,” said Dr. Menon, who holds a Canada research chair in functional MRI. “We’ve been doing these scans on MS patients for a while, but nobody knew if it was a valid approach or not. We now know how to interpret the data. It allows us to separate changes in white matter degeneration, from other changes such as iron deposition, which in conventional imaging all looks the same.”

Dr. Menon reported that the next phase of the research is to use this new imaging approach to study the changes that occur in MS and to find out if it is predictive of disease progression.

Related Links:

Western’s Robarts Research Institute



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92 (32.901763916016): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (41.007995605469): 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 (32.901763916016): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (29.802322387695): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (30.994415283203): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (29.802322387695): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (41.961669921875): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (42.915344238281): SELECT show_live FROM jos_com_show_setting LIMIT 1
105 (118.01719665527): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
106 (56.028366088867): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
107 (56.028366088867): 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=294750158 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (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=294750158 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
109 (86.069107055664): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
110 (49.114227294922): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
111 (55.074691772461): 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=294750158 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (566.00570678711): 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=294750158 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
113 (818.01414489746): 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 (671.8635559082): 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 (195.02639770508): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
116 (88.930130004883): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
117 (95.844268798828): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
118 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
119 (87.976455688477): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
120 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
121 (81.062316894531): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
122 (54.121017456055): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
123 (437.97492980957): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
124 (!!!!! 30251.026153564): 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
125 (824.92828369141): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294750158 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294750158 AND type='deeppockets_item' AND published='1' LIMIT 1
126 (!!!!! 9088.0393981934): ( 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 (100.13580322266): ( 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 (77.009201049805): 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 (56.028366088867): 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 (58.889389038086): 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 (36.001205444336): 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 (434.16023254395): 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 (59.127807617188): 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 (48.87580871582): 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 (40.054321289062): 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 (450.84953308105): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (434.87548828125): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
138 (56.028366088867): SELECT name FROM jos_deeppockets WHERE id=212
139 (30.994415283203): SELECT name FROM jos_deeppockets WHERE id=212
140 (622.03407287598): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (661.13471984863): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
142 (97.990036010742): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
143 (70.095062255859): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
144 (!!!!! 10332.107543945): TRUNCATE TABLE jos_trademed_module
145 (159.02519226074): 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=294750158 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (127.07710266113): 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=294750158 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
147 (721.21620178223): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (86.069107055664): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
149 (99.18212890625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
150 (64.13459777832): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
151 (!!!!! 2080.9173583984): 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
152 (128.03077697754): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
153 (97.990036010742): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
154 (76.055526733398): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294750158 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294750158 AND type='deeppockets_item' AND published='1' LIMIT 1
155 (75.817108154297): 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 (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=212 or channel_id is null)
157 (112.05673217773): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
158 (103.95050048828): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
159 (94.175338745117): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750158 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750158 AND published='1' LIMIT 1
160 (77.962875366211): select jos_twitters.link from jos_twitters where cat=10
161 (50.067901611328): select jos_facebook.link from jos_facebook where cat=10
162 (44.822692871094): select jos_google_plus.link from jos_google_plus where cat=10
163 (47.922134399414): select jos_linkedin.link from jos_linkedin where cat=10