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Advanced MRI Visualizes Pulsatile Brain Motion

By MedImaging International staff writers
Posted on 18 May 2021
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Image: Brain displacement patterns enabled by extra processing of 3D aMRI (Photo courtesy of Mātai)
Image: Brain displacement patterns enabled by extra processing of 3D aMRI (Photo courtesy of Mātai)
An advanced magnetic resonance imaging (aMRI) technique can capture three dimensional (3D) brain movements in real time, according to a new study.

Developed at Mātai Medical Research Institute (Mātai; Gisborne, New Zealand), Stanford University (CA, USA), and other institutions, 3D aMRI builds on previous 2D aMRI, and can show minute movements of the brain at a spatial resolution of just 1.2mm3, about the width of a human hair. The actual movements are amplified by up to a factor of 25 to allow detailed inspection of the movements. The detailed, animated, and magnified movements can help clinicians identify abnormalities, such as those caused by blockages of spinal fluids.

The researchers also qualitatively compared 3D aMRI to 2D aMRI on multi‐slice and volumetric balanced steady‐state free precession cine data and phase contrast MRI (PC‐MRI), using 3T scans acquired from healthy volunteers. The volumetric 3D aMRI data was also used to generate optical flow maps and 4D animations that reveal complete brain tissue and cerebrospinal fluid (CSF) motion, serving to highlight the piston‐like motion of the four brain ventricles. The study was published on May 5, 2021, in Magnetic Resonance in Medicine.

“The new method magnifies microscopic rhythmic pulsations of the brain as the heart beats to allow the visualization of minute piston-like movements, that are less than the width of a human hair,” said lead author Itamar Terem, MSc, a graduate student at Stanford. “The new 3D version provides a larger magnification factor, which gives us better visibility of brain motion, and better accuracy.”

“This fascinating new visualization method could help us understand what drives the flow of fluid in and around the brain. It will allow us to develop new models of how the brain functions that will guide us in how to maintain brain health and restore it in disease or disorder,” said study co-author Miriam Sadeng, MD, PhD, of the University of Auckland department of anatomy and medical imaging. “The optical flow maps and 4D animations of 3D aMRI may open up exciting applications for neurological diseases that affect the biomechanics of the brain and brain fluids.”

aMRI is based on the use of a phase‐based motion magnification algorithm applied to 2D multi‐slice cardiac gated (cine MRI) data, which results in an amplified “movie” of brain motion. aMRI has also shown promise for visualizing cerebrovascular motion using amplified flow imaging (aFlow), which can capture the characteristics of transient events present in brain tissue, such as blood flow interaction with arterial walls, when applied to 3D PC‐MRA.

Related Links:
Mātai Medical Research Institute
Stanford University


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92 (30.040740966797): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294788300 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
93 (84.161758422852): 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`
94 (361.91940307617): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (79.870223999023): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (97.990036010742): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (68.902969360352): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (96.08268737793): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (69.141387939453): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (126.12342834473): SELECT show_live FROM jos_com_show_setting LIMIT 1
105 (68.902969360352): SELECT show_live FROM jos_com_show_setting LIMIT 1
106 (91.075897216797): SELECT show_live FROM jos_com_show_setting LIMIT 1
107 (67.949295043945): SELECT show_live FROM jos_com_show_setting LIMIT 1
108 (447.98851013184): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
109 (102.99682617188): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
110 (693.79806518555): 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=294788300 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (859.02214050293): 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=294788300 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (!!!!! 2489.0899658203): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
113 (347.85270690918): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
114 (!!!!! 1502.9907226562): 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=294788300 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
115 (428.91502380371): 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=294788300 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
116 (!!!!! 3144.0258026123): 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
117 (!!!!! 8988.1420135498): 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
118 (!!!!! 4081.9644927979): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
119 (220.06034851074): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
120 (!!!!! 1305.103302002): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
121 (55.074691772461): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
122 (710.96420288086): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
123 (133.99124145508): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
124 (293.97010803223): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
125 (!!!!! 58516.979217529): 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
126 (!!!!! 7727.1461486816): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
127 (!!!!! 7639.8849487305): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
128 (!!!!! 1074.0756988525): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294788300 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294788300 AND type='deeppockets_item' AND published='1' LIMIT 1
129 (!!!!! 1732871.055603): ( 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
130 (!!!!! 1419498.9204407): ( 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
131 (806.80847167969): 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
132 (59.843063354492): 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
133 (52.928924560547): 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
134 (39.100646972656): 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
135 (48.87580871582): 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
136 (40.054321289062): 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
137 (529.05082702637): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
138 (530.00450134277): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
139 (574.11193847656): SELECT name FROM jos_deeppockets WHERE id=212
140 (346.89903259277): SELECT name FROM jos_deeppockets WHERE id=212
141 (766.99256896973): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
142 (665.90309143066): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
143 (!!!!! 4652.0233154297): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
144 (!!!!! 1317.024230957): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
145 (!!!!! 27417.898178101): TRUNCATE TABLE jos_trademed_module
146 (!!!!! 1353.9791107178): 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=294788300 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
147 (!!!!! 1535.8924865723): 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=294788300 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
148 (!!!!! 4290.1039123535): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
149 (!!!!! 6697.1778869629): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
150 (751.01852416992): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
151 (90.122222900391): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
152 (!!!!! 2320.0511932373): 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
153 (109.91096496582): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
154 (82.015991210938): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
155 (!!!!! 2755.1651000977): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294788300 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294788300 AND type='deeppockets_item' AND published='1' LIMIT 1
156 (522.13668823242): 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 (!!!!! 1341.1045074463): 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)
158 (50.067901611328): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
159 (135.18333435059): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
160 (53.882598876953): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788300 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788300 AND published='1' LIMIT 1
161 (!!!!! 5263.8053894043): select jos_twitters.link from jos_twitters where cat=10
162 (!!!!! 3082.9906463623): select jos_facebook.link from jos_facebook where cat=10
163 (287.05596923828): select jos_google_plus.link from jos_google_plus where cat=10
164 (262.97569274902): select jos_linkedin.link from jos_linkedin where cat=10
165 (375.98609924316): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
166 (!!!!! 5131.0062408447): insert into jos_banners_delta values (14615,'2025-04-29 21:03:03','18.226.82.161','view'),(14202,'2025-04-29 21:03:03','18.226.82.161','view'),(14203,'2025-04-29 21:03:03','18.226.82.161','view')