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Micro-Optical Coherence Tomography May Greatly Improve Diagnosis and Treatment of Coronary Artery Disease

By MedImaging International staff writers
Posted on 25 Jul 2011
Researchers have developed a one-micrometer-resolution version of the intravascular imaging technology optical coherence tomography (OCT) that can reveal cellular and subcellular features of coronary artery disease.

In a Nature Medicine article published online in July 2011, investigators from the Wellman Center for Photomedicine at Massachusetts General Hospital (MGH; Boston, MA, USA; www.mgh.harvard.edu) described how microOCT--which provides 10 times greater resolution than standard OCT--was able to reveal individual arterial and inflammatory cells, including structures that may identify vulnerable plaques, within coronary artery samples.

“MicroOCT has the contrast and resolution required to investigate the cellular and subcellular components underlying coronary atherosclerosis, the disease that precipitates heart attack,” said Gary Tearney, MD, PhD, of the Wellman Center and the MGH pathology department, who led the study. “This high level of performance opens up the future possibility of observing these microscopic features in human patients, which has implications for improving the understanding, diagnosis, and therapeutic monitoring of coronary artery disease.”

A catheter-based technology, OCT uses reflected near-infrared light to create detailed images of the internal surfaces of blood vessels. Even though the technology is already being utilized to identify arterial plaques that are likely to rupture, conventional OCT can clearly image only structures larger than 10 micrometers. Using new types of lenses and advanced imaging components, microOCT is able to image structures as small as one micrometer, revealing in intact tissue the precise data provided by the prepared tissue slides of conventional pathology much faster and in three dimensions.

The researchers described how using microOCT to examine human and animal coronary artery tissue revealed detailed images of endothelial cells that line coronary arteries; inflammatory cells that contribute to the formation of coronary plaques; smooth muscle cells that produce collagen in response to inflammation; and fibrin proteins and platelets that are involved in the formation of clots.

MicroOCT also produced detailed images of stents placed within coronary arteries, clearly distinguishing bare-metal stents from those covered with a drug-releasing polymer, and revealing defects in the polymer coating.

“When we are able to implement microOCT in humans--probably in three to five years--the 10 times greater resolution will allow us to observe cells in the coronary arteries of living patients,” stated Dr. Tearney, a professor of pathology at Harvard Medical School (Boston, MA, USA). “The ability to track and follow cells in three dimensions could help us prove or disprove many theories about coronary artery disease and better understand how clots form on a microscopic level. Improved definitions of high-risk plaques will lead to greater accuracy in identifying those that may go on to rupture and block the coronary artery, and the ability to monitor healing around implanted devices like stents could reduce the number of patients who must be on anticlotting medications, which are expensive and have side effects.”

Related Links:
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89 (223.87504577637): 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`
90 (!!!!! 2941.1315917969): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (!!!!! 1345.8728790283): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (202.89421081543): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (49.114227294922): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (344.03800964355): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (46.014785766602): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (159.97886657715): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (530.95817565918): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (257.96890258789): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (46.968460083008): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (270.12825012207): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (219.10667419434): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (365.01884460449): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (206.94732666016): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (!!!!! 1867.0558929443): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
105 (97.990036010742): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
106 (488.9965057373): 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=294736246 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (!!!!! 1076.9367218018): 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=294736246 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (!!!!! 4052.8774261475): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
109 (!!!!! 4369.9741363525): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
110 (829.93507385254): 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=294736246 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (!!!!! 1203.0601501465): 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=294736246 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (!!!!! 5150.0797271729): 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 (!!!!! 6509.0656280518): 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 (391.00646972656): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
115 (817.06047058105): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
116 (424.14665222168): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
117 (!!!!! 1740.9324645996): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
118 (295.87745666504): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
119 (828.02772521973): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
120 (!!!!! 1142.9786682129): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
121 (!!!!! 1464.1284942627): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
122 (194.07272338867): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 212634.08660889): 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 (!!!!! 11334.896087646): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294736246 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294736246 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 3558.874130249): ( 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 (!!!!! 1898.0503082275): ( 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 (286.81755065918): 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 (303.98368835449): 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 (260.1146697998): 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 (311.13624572754): 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 (36.954879760742): 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 (!!!!! 2755.880355835): 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 (438.92860412598): 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 (517.84515380859): 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 (668.04885864258): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (449.89585876465): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (253.20053100586): SELECT name FROM jos_deeppockets WHERE id=215
138 (59.843063354492): SELECT name FROM jos_deeppockets WHERE id=215
139 (895.02334594727): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (!!!!! 1665.1153564453): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))215((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (137.0906829834): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
142 (72.956085205078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
143 (!!!!! 15513.181686401): TRUNCATE TABLE jos_trademed_module
144 (144.00482177734): 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=294736246 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (82.969665527344): 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=294736246 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (552.89268493652): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (195.02639770508): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (110.86463928223): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
149 (64.13459777832): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
150 (!!!!! 1311.0637664795): 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 (449.89585876465): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
152 (!!!!! 1987.9341125488): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
153 (335.9317779541): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294736246 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294736246 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (107.0499420166): 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)
155 (35.04753112793): 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)
156 (!!!!! 13278.007507324): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (!!!!! 7602.9300689697): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
158 (!!!!! 7951.021194458): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294736246 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294736246 AND published='1' LIMIT 1
159 (124.93133544922): select jos_twitters.link from jos_twitters where cat=10
160 (58.174133300781): select jos_facebook.link from jos_facebook where cat=10
161 (42.915344238281): select jos_google_plus.link from jos_google_plus where cat=10
162 (846.14753723145): select jos_linkedin.link from jos_linkedin where cat=10