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Visualizing the Moving Wrist with New MRI Technology

By MedImaging International staff writers
Posted on 13 Jan 2014
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Image:  The forearm of a healthy volunteer in the wrist harness (Photo courtesy of Plos One).
Image: The forearm of a healthy volunteer in the wrist harness (Photo courtesy of Plos One).
Image: Extensor carpi ulnaris (ECU) tendon translation during wrist rotation (Photo courtesy of Plos One).
Image: Extensor carpi ulnaris (ECU) tendon translation during wrist rotation (Photo courtesy of Plos One).
Scientists have created moving pictures of the wrist in motion using a series of short magnetic resonance imaging (MRI) scans. Called “Active MRI,” the technique could be useful in diagnosing subtle changes in physiology that indicate the onset of conditions such as wrist instability.

The findings of the University of California (UC) Davis Medical Center(Sacramento, CA, USA) radiologists, medical physicists, and orthopedic surgeons first assessment of the new technique was published online December 31, 2013, in the journal PLOS ONE. “These fast images are like a live-action movie,” said Robert Boutin, professor of radiology at UC Davis and lead author of the study. “The movie can be slowed, stopped, or even reversed as needed. Now patients can reproduce the motion that’s bothering them while they’re inside the scanner, and physicians can assess how the wrist is actually working. After all, some patients only have pain or other symptoms with movement.”

Senior author Dr. Abhijit Chaudhari noted that wrist instability occurs when carpal bones become misaligned and affect joint function, frequently as a consequence of trauma that injures the ligaments between wrist bones. It causes abnormal mobility and chronic pain that can lead to osteoarthritis, a key socioeconomic liability to patients and healthcare systems. Good results in managing the condition are more probably with early diagnosis, when less-invasive treatments are possible.

Imaging technology such as dynamic computed tomography (CT) and fluoroscopy can visualize the moving wrist, but these approaches involve radiation and do not show soft tissue such as ligaments--a major part of the wrist’s intricate anatomy as well as MRI scans.

“MRI scans provide detailed anatomical information of wrist structures without using ionizing radiation, but they cannot help diagnose problems with bone or tendon position that are best seen when the wrist is moving,” said Dr. Chaudhari, assistant professor of radiology at UC Davis. “Active-MRI provides a detailed and ‘real time’ view of the kinesiology of the wrist in action using a widely available and safe technology.”

The researchers solved a number of hurdles in modifying MRI capabilities to providing moving images. A complete MRI scan typically takes 30 to 45 minutes, with each image set requiring at least three minutes—not nearly fast enough to make a video. The researchers developed a new MRI protocol that takes one image every 0.5 seconds, providing a set of images in a half minute.

Another hurdle to overcome was the presence of imaging errors called banding artifacts. Movement of the bones in the wrist area can impede the scanner’s magnetic field, creating signal drop-offs. The resulting dark bands can hide the moving wrist. The team overcame this difficulty with dielectric pads, which stabilize the magnetic field and move artifacts away from the area of interest and to the side, allowing clinicians to clearly see the wrist bones.

Active-MRI was evaluated for the study on 15 wrists of 10 study participants with no symptoms of wrist problems. The participants’ wrists were imaged as they performed motions such as clenching the fist, rotating the wrist, and waving the hand side-to-side. Each scan lasted 10 minutes. “It’s quite phenomenal that we can look inside the body while it’s in action using MRI,” said Prof. Boutin. “Routine MRI provides exquisite details, but only if the body is completely motionless in one particular position. But bodies are made to move. We think Active MRI will be a valuable tool in augmenting traditional, static MRI tests.”

“Our next step is to validate the technology by using it on patients with symptoms of wrist instability,” added Dr. Chaudhari. “We also want to use Active-MRI to study sex distinctions in musculoskeletal conditions, including why women tend to be more susceptible to hand osteoarthritis and carpal tunnel syndrome.”

Related Links:

University of California, Davis Medical Center


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85 (813.96102905273): SELECT show_live FROM jos_com_show_setting LIMIT 1
86 (513.07678222656): SELECT show_live FROM jos_com_show_setting LIMIT 1
87 (554.08477783203): SELECT show_live FROM jos_com_show_setting LIMIT 1
88 (621.08039855957): SELECT show_live FROM jos_com_show_setting LIMIT 1
89 (!!!!! 4917.8600311279): SELECT show_live FROM jos_com_show_setting LIMIT 1
90 (!!!!! 12175.0831604): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (944.13757324219): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294750103 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
92 (617.98095703125): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294750103 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
93 (591.03965759277): 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 (304.9373626709): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (741.00494384766): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (782.96661376953): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (792.9801940918): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (834.94186401367): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (457.0484161377): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (820.87516784668): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (!!!!! 1065.0157928467): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (562.90626525879): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (315.90461730957): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (!!!!! 1322.9846954346): SELECT show_live FROM jos_com_show_setting LIMIT 1
105 (205.99365234375): SELECT show_live FROM jos_com_show_setting LIMIT 1
106 (481.12869262695): SELECT show_live FROM jos_com_show_setting LIMIT 1
107 (133.99124145508): SELECT show_live FROM jos_com_show_setting LIMIT 1
108 (445.12748718262): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
109 (744.10438537598): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
110 (200.98686218262): 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=294750103 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (591.99333190918): 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=294750103 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (205.03997802734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
113 (!!!!! 1035.9287261963): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
114 (319.00405883789): 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=294750103 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
115 (!!!!! 1228.8093566895): 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=294750103 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
116 (524.04403686523): 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 (314.95094299316): 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 (86.069107055664): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
119 (59.127807617188): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
120 (53.882598876953): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
121 (37.193298339844): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
122 (50.067901611328): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
123 (39.100646972656): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
124 (251.05476379395): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
125 (!!!!! 110691.78581238): 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 (254.86946105957): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
127 (244.140625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
128 (!!!!! 7771.9688415527): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294750103 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294750103 AND type='deeppockets_item' AND published='1' LIMIT 1
129 (!!!!! 2019721.9848633): ( 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 (!!!!! 1001124.1436005): ( 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 (164.03198242188): 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 (136.8522644043): 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 (138.0443572998): 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 (134.94491577148): 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 (125.16975402832): 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 (128.03077697754): 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 (!!!!! 1880.8841705322): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
138 (844.00177001953): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
139 (139.95170593262): SELECT name FROM jos_deeppockets WHERE id=212
140 (31.948089599609): SELECT name FROM jos_deeppockets WHERE id=212
141 (473.0224609375): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
142 (396.9669342041): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
143 (844.00177001953): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
144 (60.081481933594): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
145 (!!!!! 8267.879486084): TRUNCATE TABLE jos_trademed_module
146 (!!!!! 1475.0957489014): 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=294750103 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
147 (836.84921264648): 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=294750103 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
148 (768.18466186523): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
149 (84.877014160156): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
150 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
151 (39.815902709961): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
152 (!!!!! 1024.9614715576): 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 (462.05520629883): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
154 (71.048736572266): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
155 (604.86793518066): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294750103 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294750103 AND type='deeppockets_item' AND published='1' LIMIT 1
156 (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)
157 (27.179718017578): 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 (124.93133544922): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
159 (118.97087097168): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
160 (43.869018554688): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750103 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750103 AND published='1' LIMIT 1
161 (50.067901611328): select jos_twitters.link from jos_twitters where cat=10
162 (28.133392333984): select jos_facebook.link from jos_facebook where cat=10
163 (27.894973754883): select jos_google_plus.link from jos_google_plus where cat=10
164 (28.133392333984): select jos_linkedin.link from jos_linkedin where cat=10
165 (272.98927307129): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
166 (!!!!! 1199.9607086182): insert into jos_banners_delta values (14615,'2025-04-30 10:40:49','3.19.64.3','view'),(14202,'2025-04-30 10:40:49','3.19.64.3','view'),(14203,'2025-04-30 10:40:49','3.19.64.3','view')