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Animal “Return Signals” Employed for Ultrasound Applications

By MedImaging International staff writers
Posted on 08 Dec 2011
Scientists have been studying the “biosonar” capabilities of animals in the quest to devise better ultrasound applications for medical imaging and the military.

Sonar and ultrasound, which use sound as a navigational device and to paint accurate pictures of an environment, are the foundation of many technologies, including medical ultrasound units and military navigation systems. More...
However, when it comes to more effective sonar and ultrasound, animals’ biosonar capabilities still are far more superior.

In a new study that examined bats, dolphins, and mole rats, Prof. Nathan Intrator of Tel Aviv University’s Blavatnik School of Computer Science (Israel), in collaboration with Brown University’s (Providence, RI, USA) Prof. Jim Simmons, is working to identify the reasons biosonar has the advantage over man-made technologies. Using a unique method for measuring how the animals interpret the returning signals, Prof. Intrator has determined that the key to these animals’ success is better, real-time data processing. “Animal ‘echolocations’ are done in fractions of milliseconds, at a resolution so high that a dolphin can see a tennis ball from approximately 80 meters away,” he said, noting that the animals are able to process several pieces of information simultaneously.

Their research, which was reported in the Journal of the Acoustical Society of America and presented at the 2010 and 2011 Machine Learning for Signal Processing (MLSP) conferences, could lead to cutting-edge navigation systems and more accurate medical imaging.

Biosonar animals send ultrasonic sounds called “pings” into the environment. The shape of the returning signals, or echoes, determines how these animals “see” their surroundings, helping them to navigate or hunt for prey. In a matter of tens of milliseconds, the neurons in the animal’s brain are capable of a full-scale analysis of their surroundings represented in three dimensions, with little energy consumption. Even with the help of a supercomputer, which consumes thousands of times more energy, humans cannot generate such an accurate picture, Prof. Intrator reported. Using echolocation, a bat can tell the difference between a fly in motion or at rest, or determine which of two fruits is heavier by observing their movements in the wind.

Fascinated by the quality of the natural biosonar over its man-made counterparts, Profs. Intrator and Simmons set out to examine how biosonar animals perform echolocation so rapidly and accurately. Using an electronic system, they modified the frequency and noise levels of the echo returned to the animal. By manipulating the echo, the researchers could determine what factors of the returning signal reduced an animal’s ability to accurately analyze the returns. This then led to a better determination of how the returning echoes are represented and analyzed in the animal’s brain.

Prof. Intrator and his fellow researchers have created mathematical models, involving machine signal and learning processing, which improve man’s ability to interpret the echoes. This will lead to more accurate echo localization and better resilience to background noise. Once researchers collect more data about animal interpretation of biosonar, they will be able to mimic this technology for better ultrasound and sonar systems, according to Prof. Intrator. “Animals explore pings with multiple filters or receptive fields, and we have demonstrated that exploring each ping in multiple ways can lead to higher accuracy,” he explained. “By understanding sonar animals, we can create a new family of ultrasound systems that will be able to explore our bodies with more accurate medical imaging.”

This new development could provide a variety of benefits to the medical imaging field, such as earlier detection of defects in embryos or noninvasive detection of cancer tumors. Dissimilar to a magnetic resonance imaging (MRI) or computed tomography (CT) scanner, which are large, costly to operate, and frequently use hazardous radiation, the new generation of ultrasound machines could be used in a physician’s office at a portion of the cost.

Related Links:
Blavatnik School of Computer Science
Brown University


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81 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
82 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
83 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
84 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
85 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
86 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
87 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
88 (34.809112548828): SELECT show_live FROM jos_com_show_setting LIMIT 1
89 (53.882598876953): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294738388 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
90 (31.232833862305): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294738388 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
91 (76.055526733398): 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`
92 (62.942504882812): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (40.054321289062): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (39.100646972656): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (33.855438232422): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (29.802322387695): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (29.087066650391): SELECT show_live FROM jos_com_show_setting LIMIT 1
105 (38.14697265625): SELECT show_live FROM jos_com_show_setting LIMIT 1
106 (101.08947753906): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
107 (57.93571472168): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
108 (67.949295043945): 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=294738388 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
109 (86.069107055664): 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=294738388 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
110 (133.99124145508): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
111 (62.942504882812): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
112 (59.127807617188): 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=294738388 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
113 (562.90626525879): 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=294738388 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
114 (615.83518981934): 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 (410.07995605469): 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
116 (108.95729064941): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
117 (71.048736572266): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
118 (64.849853515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
119 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
120 (53.882598876953): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
121 (36.954879760742): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
122 (48.87580871582): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
123 (41.007995605469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
124 (307.79838562012): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
125 (!!!!! 24060.010910034): 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 (602.00691223145): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294738388 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294738388 AND type='deeppockets_item' AND published='1' LIMIT 1
127 (!!!!! 8342.0276641846): ( 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 (116.82510375977): ( 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
129 (70.095062255859): 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 (57.93571472168): 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
131 (54.121017456055): 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 (38.862228393555): 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
133 (397.2053527832): 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 (50.067901611328): 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
135 (54.836273193359): 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 (36.001205444336): 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
137 (522.85194396973): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
138 (449.89585876465): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
139 (43.153762817383): SELECT name FROM jos_deeppockets WHERE id=214
140 (38.14697265625): SELECT name FROM jos_deeppockets WHERE id=214
141 (617.02728271484): 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 '((;)|(^))214((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
142 (607.01370239258): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))214((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
143 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
144 (71.048736572266): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
145 (!!!!! 9735.107421875): TRUNCATE TABLE jos_trademed_module
146 (138.0443572998): 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=294738388 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
147 (61.03515625): 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=294738388 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
148 (611.0668182373): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
149 (85.115432739258): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
150 (79.870223999023): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
151 (68.902969360352): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
152 (!!!!! 1534.9388122559): 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 (80.108642578125): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
154 (49.829483032227): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
155 (59.127807617188): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294738388 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294738388 AND type='deeppockets_item' AND published='1' LIMIT 1
156 (51.021575927734): 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=214 or channel_id is null)
157 (43.869018554688): 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=214 or channel_id is null)
158 (77.962875366211): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
159 (108.00361633301): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
160 (75.101852416992): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294738388 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294738388 AND published='1' LIMIT 1
161 (56.028366088867): select jos_twitters.link from jos_twitters where cat=10
162 (34.093856811523): select jos_facebook.link from jos_facebook where cat=10
163 (41.007995605469): select jos_google_plus.link from jos_google_plus where cat=10
164 (39.100646972656): select jos_linkedin.link from jos_linkedin where cat=10
165 (322.10350036621): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14202,14203)
166 (!!!!! 1917.839050293): insert into jos_banners_delta values (14202,'2025-08-12 15:40:26','216.73.216.186','view'),(14203,'2025-08-12 15:40:26','216.73.216.186','view')