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First 3D Optical Imaging View of Human Coronary Arteries

By MedImaging International staff writers
Posted on 15 Dec 2008
For the first time, researchers are getting a detailed look at the interior of human coronary arteries using a newly developed optical imaging technique. The investigators reported how optical frequency-domain imaging (OFDI) provides three-dimensional (3D), microscopic views of significant segments of patients' coronary arteries, visualizing areas of inflammation and plaque deposits.

"This is the first human demonstration of a technique that has the potential to change how cardiologists look at coronary arteries,” said Gary Tearney, M.D., Ph.D., of the Wellman Center for Photomedicine at Massachusetts General Hospital (MGH; Boston, MA, USA), the study's lead author. "The wealth of information that we can now obtain will undoubtedly improve our ability to understand coronary artery disease and may allow cardiologists to diagnose and treat plaque before it leads to serious problems.”

OFDI is an improvement over optical coherence tomography (OCT), another imaging technology developed by the MGH investigators. While OCT examines tissues one point at a time, OFDI can look at over 1,000 points simultaneously using a device developed at MGH-Wellman. Inside a fiberoptic probe a constantly rotating laser tip emits a light beam with an ever-changing wavelength. As the probe moves through the structure to be imaged, measuring how each wavelength is reflected back allows fast acquisition of the data required to create the detailed microscopic images. Besides providing three-dimensional images of an artery's microstructure in seconds, the increased speed also reduces signal interference from blood, which had plagued the first-generation technology. In 2006, members of the MGH-Wellman team reported the successful use of OFDI to image the esophagus and coronary arteries of pigs.

The current study enrolled three patients scheduled to have stents placed in their coronary arteries at the Lahey Clinic (Burlington, MA, USA). After the completion of stent placement, OFDI was used to image 3- to 7-cm-long segments of the patients' coronary arteries including the stented areas. OFDI provided detailed images along the length of the arteries--visualizing lipid or calcium deposits, immune cells that could indicate inflammation, and the stents--in dramatic "fly-through” views looking down the artery's interior. More detailed, cross-sectional images of narrowed vascular segments revealed features associated with the type of atherosclerotic plaques that are likely to rupture and cause a heart attack.

Dr. Tearney and his colleagues noted that these findings need to be duplicated in a larger group of patients, and the time required to process the fly-through images--currently several hours--needs to be reduced to provide the real-time information most useful for clinical applications. Combining OFDI with intravascular ultrasound might help with another of the technique's limitations, the inability to penetrate deep into tissues.

"While more work remains, the technology is advancing at a rapid pace. We expect to see commercial devices available in a one- to two-year time frame,” commented Brett Bouma, Ph.D., an MGH associate professor of dermatology, and senior author of the report. "Our goal now is to help put the pieces in place to ensure that this technique will be widely available to interventional cardiologists.”

MGH conducts the largest hospital-based research program in the United States, with major research centers in AIDS, cardiovascular research, cancer, computational and integrative biology, cutaneous biology, human genetics, medical imaging, neurodegenerative disorders, regenerative medicine, systems biology, transplantation biology, and photomedicine.

The researchers published their findings in the November 2008 issue of the journal JACC: Cardiovascular Imaging.

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89 (68.902969360352): 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 (617.98095703125): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (282.04917907715): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (239.13383483887): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (80.108642578125): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (!!!!! 3575.0865936279): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (618.93463134766): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (82.969665527344): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (316.85829162598): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (31.948089599609): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (118.01719665527): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (247.95532226562): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (!!!!! 2366.0659790039): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (!!!!! 3177.1659851074): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
105 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
106 (58.174133300781): 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=294721396 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (718.11676025391): 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=294721396 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (!!!!! 3952.9800415039): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
109 (92.029571533203): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
110 (226.02081298828): 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=294721396 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (730.03768920898): 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=294721396 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (540.97175598145): 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 (763.89312744141): 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 (336.88545227051): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
115 (334.9781036377): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
116 (649.92904663086): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
117 (158.07151794434): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
118 (408.17260742188): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
119 (266.07513427734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
120 (401.02005004883): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
121 (334.02442932129): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
122 (297.06954956055): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 78930.854797363): 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 (762.939453125): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294721396 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294721396 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (49.114227294922): ( 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 (623.94142150879): ( 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 (205.99365234375): 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 (269.88983154297): 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 (725.03089904785): 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 (215.05355834961): 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 (!!!!! 1229.0477752686): 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 (43.869018554688): 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 (195.02639770508): 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 (308.03680419922): 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 (!!!!! 1930.9520721436): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (!!!!! 2785.9210968018): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (!!!!! 1042.1276092529): SELECT name FROM jos_deeppockets WHERE id=215
138 (!!!!! 2576.8280029297): SELECT name FROM jos_deeppockets WHERE id=215
139 (!!!!! 1351.1180877686): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (!!!!! 1710.1764678955): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))215((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (!!!!! 2815.0081634521): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
142 (!!!!! 1775.0263214111): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
143 (!!!!! 6419.1818237305): TRUNCATE TABLE jos_trademed_module
144 (148.05793762207): 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=294721396 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (95.129013061523): 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=294721396 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (512.12310791016): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (56.028366088867): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
149 (40.054321289062): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
150 (!!!!! 1255.0354003906): 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 (196.93374633789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
152 (!!!!! 3723.8597869873): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
153 (41.961669921875): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294721396 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294721396 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (39.100646972656): 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 (206.94732666016): 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 (40.054321289062): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (447.98851013184): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
158 (118.01719665527): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294721396 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294721396 AND published='1' LIMIT 1
159 (82.969665527344): select jos_twitters.link from jos_twitters where cat=10
160 (221.01402282715): select jos_facebook.link from jos_facebook where cat=10
161 (!!!!! 3093.0042266846): select jos_google_plus.link from jos_google_plus where cat=10
162 (47.206878662109): select jos_linkedin.link from jos_linkedin where cat=10