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MR-Controlled Capsule Endoscope Devised to Image the Digestive System

By MedImaging International staff writers
Posted on 02 Jan 2012
Endoscopes--small cameras or optic fibers that are typically attached to flexible tubing designed to investigate the interior of the body--can be dangerously invasive. Medical procedures frequently require sedative medications and some recovery time.

Researchers are now developing a capsule endoscope that can travel through the digestive tract to identify problems independent of any attachments.

According to Dr. Gabor Kosa of Tel Aviv University’s (TAU) School of Mechanical Engineering, the study was inspired by an endoscopic capsule designed for use in the small intestine. But unlike the existing capsule, which travels at random and snaps pictures every half second to give clinicians an overall view of the intestines, the new “wireless” capsules will use the magnetic field of a magnetic resonance imaging (MRI) scanner and electronic signals manipulated by those operating the capsule to forge a more precise and deliberate path.

It is a less invasive and more accurate way for clinicians to get an crucial look at the digestive tract, where difficult-to-diagnose tumors or wounds may be hidden, or allow for treatments such as biopsies or local drug delivery. The technology, which was reported online October 28, 2011, in the journal Biomedical Microdevices, was developed in collaboration with Dr. Peter Jakab, an engineer from the surgical planning laboratory at Brigham and Women’s Hospital (Boston, MA, USA) affiliated with Harvard Medical School (Boston, MA, USA).

What makes this endoscope unique is its ability to investigate actively the digestive tract under the direction of a physician. To achieve this, the device relies on the magnetic field of the MRI machine as a “driving force,” said Dr. Kosa. “An MRI has a very large constant magnetic field,” he explained. “The capsule needs to navigate according to this field, like a sailboat sailing with the wind.”

To help the capsules “swim” with the magnetic current, the researchers have given them “tails,” a combination of copper coils and flexible polymer. The magnetic field generates a vibration in the tail, which allows for movement, and electronics and microsensors embedded in the capsule allow the capsule’s operator to manipulate the magnetic field that guides the movement of the device. The use of copper, a nonferromagnetic material, circumvents other diagnostic difficulties posed by MRI, Dr. Kosa added. Whereas most magnets interfere with MRI by obscuring the image, copper appears as only a minor spot on otherwise clear film.

The ability to drive the capsule, according to Dr. Kosa, will not only lead to better diagnosis capabilities, but patients will experience a less invasive procedure in a fraction of the time.

In the lab at the Brigham and Women’s Hospital, Dr. Kosa and his fellow researchers have assessed the driving mechanism of the capsule in an aquarium inside the MRI. The results have shown that the capsule can effectively be operated using a magnetic field. In the next step, the researchers are hoping to additional develop the capsule’s endoscopic and signaling functions.

According to Dr. Kosa, a new faculty recruit to TAU, this project is part of a bright future for the field of microrobotics. At the university, his new research lab, called RBM2S, focuses on microsystems and robotics for biomedical applications and an educational engineering robotics lab (ERL) will teach future robotics experts studying at TAU’s School of Mechanical Engineering.

Related Links:

Tel Aviv University
Brigham and Women’s Hospital


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90 (76.055526733398): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (80.108642578125): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (32.186508178711): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (41.961669921875): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (40.769577026367): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (38.14697265625): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (30.994415283203): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (77.962875366211): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
105 (152.8263092041): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
106 (79.870223999023): 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=294738692 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (69.141387939453): 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=294738692 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (81.062316894531): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
109 (44.107437133789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
110 (61.988830566406): 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=294738692 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (628.94821166992): 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=294738692 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (571.96617126465): 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 (385.99967956543): 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 (91.075897216797): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
115 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
116 (64.13459777832): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
117 (40.054321289062): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
118 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
119 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
120 (97.990036010742): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
121 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
122 (285.86387634277): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 21268.844604492): 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 (538.82598876953): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294738692 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294738692 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 7831.0966491699): ( 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 (160.93254089355): ( 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 (66.041946411133): 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 (45.061111450195): 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 (69.856643676758): 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 (49.114227294922): 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 (404.11949157715): 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 (71.048736572266): 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 (31.948089599609): 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 (28.848648071289): 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 (454.90264892578): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (358.10470581055): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (37.908554077148): SELECT name FROM jos_deeppockets WHERE id=212
138 (29.087066650391): SELECT name FROM jos_deeppockets WHERE id=212
139 (775.09880065918): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (627.04086303711): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (72.956085205078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
142 (66.995620727539): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
143 (!!!!! 12175.0831604): TRUNCATE TABLE jos_trademed_module
144 (129.93812561035): 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=294738692 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (79.870223999023): 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=294738692 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (923.15673828125): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (112.05673217773): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
149 (66.995620727539): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
150 (!!!!! 1196.8612670898): 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 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
152 (54.121017456055): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
153 (55.074691772461): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294738692 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294738692 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (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)
155 (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)
156 (36.954879760742): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (66.995620727539): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
158 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738692 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738692 AND published='1' LIMIT 1
159 (40.054321289062): select jos_twitters.link from jos_twitters where cat=10
160 (28.848648071289): select jos_facebook.link from jos_facebook where cat=10
161 (30.994415283203): select jos_google_plus.link from jos_google_plus where cat=10
162 (29.087066650391): select jos_linkedin.link from jos_linkedin where cat=10
163 (259.8762512207): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 1282.9303741455): insert into jos_banners_delta values (14615,'2025-06-26 16:02:49','216.73.216.249','view'),(14202,'2025-06-26 16:02:49','216.73.216.249','view'),(14203,'2025-06-26 16:02:49','216.73.216.249','view')