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New Hand-Held OCT Device to Simplify Early Detection of Retinal Disease

By MedImaging International staff writers
Posted on 31 Dec 2013
A novel hand-held optical device quickly scans a patient’s entire retina and so could aid in detecting early signs of a host of retinal diseases, including diabetic retinopathy, glaucoma, and macular degeneration.

A team at the Massachusetts Institute of Technology (MIT; Cambridge, MA, USA) describes their new ophthalmic-screening instrument in a report by Lu, C.D. et al., published by The Optical Society (Washington DC, USA), December 20, 2013, in the journal Biomedical Optics Express. Although others have created hand-held devices using similar technology, the new design is the first to combine cutting-edge technologies such as ultrahigh-speed 3D imaging, a tiny micro-electromechanical systems (MEMS) mirror for scanning, and a technique to correct for unintentional movement by the patient. These innovations should allow clinicians to collect comprehensive data with just one measurement.

Many eye diseases should be detected and treated long before any visual symptoms arise, but few people visit eye specialists regularly. The MIT group, in collaboration with the University of Erlangen and Praevium/Thorlabs, has developed this portable instrument to improve public access to eye care. "Hand-held instruments can enable screening a wider population outside the traditional points of care," said Prof. James Fujimoto, MIT. They can be used at a primary-care physician's office or even in the developing world.

The instrument uses optical coherence tomography (OCT), which sends beams of infrared light into the eye and onto the retina. Echoes of this light return to the instrument, which uses interferometry to measure changes in the time delay and magnitude of the returning light echoes, revealing the cross-sectional tissue structure of the retina, similar to radar or ultrasound imaging. Tabletop OCT imagers have become a standard of care in ophthalmology, and current generation hand-held scanners are used for imaging infants and monitoring retinal surgery. The MIT group turned a typically large instrument into a portable size by using a MEMS mirror to scan the OCT imaging beam. The new device can acquire images comparable in quality to the conventional tabletop OCT instruments used by ophthalmologists.

To deal with the motion instability of a hand-held device, the instrument takes multiple 3D images at high speeds, scanning one particular volume of the eye many times but with different scanning directions. This makes it possible to correct for distortions due to motion of the operator’s hand or the subject’s eye.

The next step, said Prof. Fujimoto, is to evaluate the technology in clinical settings; however, the device is still expensive. "The hand-held platform allows the diagnosis or screening to be performed in a much wider range of settings,” said Prof. Fujimoto. He envisions that in the future hand-held OCT technology can be used in many other medical specialties beyond ophthalmology, such as in applications ranging from surgical guidance to military medicine.

Related Links:

Massachusetts Institute of Technology
The Optical Society



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87 (24.795532226562): SELECT show_live FROM jos_com_show_setting LIMIT 1
88 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
89 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
90 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (24.080276489258): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (24.795532226562): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (37.908554077148): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294749934 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
96 (26.941299438477): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294749934 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
97 (30.994415283203): 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`
98 (50.067901611328): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (25.98762512207): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (24.080276489258): SELECT show_live FROM jos_com_show_setting LIMIT 1
105 (24.795532226562): SELECT show_live FROM jos_com_show_setting LIMIT 1
106 (24.080276489258): SELECT show_live FROM jos_com_show_setting LIMIT 1
107 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
108 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
109 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
110 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
111 (25.033950805664): SELECT show_live FROM jos_com_show_setting LIMIT 1
112 (!!!!! 1769.0658569336): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
113 (70.095062255859): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
114 (52.928924560547): 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=294749934 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
115 (46.014785766602): 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=294749934 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
116 (61.03515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
117 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
118 (43.869018554688): 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=294749934 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
119 (502.8247833252): 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=294749934 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
120 (648.02169799805): 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
121 (411.9873046875): 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
122 (76.055526733398): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
123 (75.817108154297): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
124 (43.869018554688): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
125 (39.100646972656): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
126 (43.153762817383): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
127 (44.107437133789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
128 (281.09550476074): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
129 (!!!!! 120958.08982849): 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
130 (785.11238098145): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
131 (514.98413085938): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
132 (!!!!! 3396.0342407227): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294749934 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294749934 AND type='deeppockets_item' AND published='1' LIMIT 1
133 (!!!!! 647655.01022339): ( 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
134 (!!!!! 1849547.1477509): ( 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
135 (!!!!! 6598.949432373): 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
136 (!!!!! 13077.974319458): 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
137 (!!!!! 11284.112930298): 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
138 (!!!!! 6185.0547790527): 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
139 (305.8910369873): 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
140 (617.98095703125): 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
141 (321.1498260498): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
142 (292.06275939941): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
143 (46.014785766602): SELECT name FROM jos_deeppockets WHERE id=215
144 (!!!!! 1669.8837280273): SELECT name FROM jos_deeppockets WHERE id=215
145 (504.0168762207): 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 '((;)|(^))215((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
146 (365.9725189209): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))215((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
147 (!!!!! 1346.1112976074): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
148 (76.770782470703): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
149 (!!!!! 9855.9856414795): TRUNCATE TABLE jos_trademed_module
150 (!!!!! 1224.0409851074): 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=294749934 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
151 (575.06561279297): 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=294749934 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
152 (411.03363037109): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
153 (56.028366088867): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
154 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
155 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
156 (!!!!! 1016.1399841309): 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
157 (227.21290588379): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
158 (118.01719665527): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
159 (!!!!! 2336.9789123535): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294749934 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294749934 AND type='deeppockets_item' AND published='1' LIMIT 1
160 (64.13459777832): 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=215 or channel_id is null)
161 (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=215 or channel_id is null)
162 (37.908554077148): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
163 (157.11784362793): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
164 (612.97416687012): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749934 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749934 AND published='1' LIMIT 1
165 (50.067901611328): select jos_twitters.link from jos_twitters where cat=10
166 (34.809112548828): select jos_facebook.link from jos_facebook where cat=10
167 (36.001205444336): select jos_google_plus.link from jos_google_plus where cat=10
168 (33.855438232422): select jos_linkedin.link from jos_linkedin where cat=10
169 (360.01205444336): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
170 (!!!!! 11304.140090942): insert into jos_banners_delta values (14615,'2025-04-29 21:11:23','18.119.99.38','view'),(14202,'2025-04-29 21:11:23','18.119.99.38','view'),(14203,'2025-04-29 21:11:23','18.119.99.38','view')