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World's Fastest Camera Represents a New Type of Imaging

By MedImaging International staff writers
Posted on 27 May 2009
Researchers have developed a novel, continuously running camera that captures images about 1,000 times faster than any existing conventional camera. More...


Ultrafast, light-sensitive video cameras are needed for observing high-speed events such as shockwaves, communication between living cells, neural activity, laser surgery, and elements of blood analysis. To capture such elusive moments, a camera must be able to capture millions or billions of images continuously with a very high frame rate. Conventional cameras are simply not up to the task.

In an article in the April 30, 2009, issue of the journal Nature, University of California, Los Angeles (UCLA) Henry Samueli School of Engineering and Applied Science (USA) researchers Drs. Keisuke Goda, Kevin Tsia, and team leader Bahram Jalali describe an entirely new approach to imaging that does not require a traditional CCD (charge-coupled device) or CMOS (complementary metal-oxide semiconductor) video camera. Building on more than 10 years of research on photonic time stretch, a technique for capturing elusive events, the team has demonstrated a camera that captures images at some 6 million frames per second.

"The most demanding application for high-speed imaging involves fast events that are very rare, rogue events or the proverbial needle in the haystack--in other words, unusual events that carry important information,” said Dr. Jalali, a professor of electrical engineering and principal investigator of the project.

One of the applications he envisions for the camera is flow cytometry, a technique used for blood analysis. Traditional blood analyzers can count cells and extract information about their size, but they cannot take pictures of every cell because no camera is fast and sensitive enough for the task. At the same time, images of cells are needed to distinguish diseased cells from healthy ones. Currently, images are taken manually under a microscope from a very small sample of blood.

But what if you needed to detect the presence of very rare cells that although few in number signify the early stages of a disease? Circulating tumor cells are a perfect example. Typically, there are only a handful of them among a billion healthy cells; yet these cells are precursors to metastasis, the spread of cancer that causes about 90% of cancer mortalities.

"The chance that one of these cells will happen to be on the small sample of blood viewed under a microscope is negligible,” Dr. Jalali said. "To find these rogue cells--needles in the haystack--you need to analyze billions of cells, the entire haystack. Ultra-high-speed imaging of cells in flow is a potential solution for detection of rare abnormal cells.”

The new imager operates by capturing each picture with an ultrashort laser pulse--a flash of light only a billionth of a second long. It then converts each pulse to a serial data stream that resembles the data in a fiberoptic network rather than the signal coming out of a camera. Using a technique known as amplified dispersive Fourier transform, these laser pulses, each containing an entire picture, are amplified and simultaneously stretched in time to the point that they are slow enough to be captured with an electronic digitizer.

The essential problem in performing high-speed imaging, according to Dr. Jalali, is that the camera becomes less and less sensitive at higher and higher speeds. It is simple to understand why: At high frame rates, there is less time to collect photons in each frame before the signal becomes weaker and more prone to noise. The new imager overcomes this because it is the first to feature optical image amplification.

"Our serial time-encoded amplified microscopy [STEAM] technology enables continuous real-time imaging at a frame rate of more than 6 MHz, a shutter speed of less than 450 ps, and an optical image gain of more than 300--the world's fastest continuously running camera, useful for studying rapid phenomena in physics, chemistry, and biology,” said research coauthor Dr. Goda, a postdoctoral researcher in the group.

One such phenomenon the group has studied with the new camera is laser ablation, an important technology that is the basis of laser medicine. The camera can capture laser ablation happening in real time, providing important clues for understanding the process and optimizing its effectiveness. "Unlike other high-speed imaging methods, our approach does not require cooling of the camera or high-intensity illumination--problems that plague conventional CCD and CMOS cameras,” said Kevin Tsia, a graduate student in the group and a coauthor of the research.

Related Links:
UCLA Henry Samueli School of Engineering and Applied Science


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81 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
82 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
83 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
84 (27.179718017578): SELECT show_live FROM jos_com_show_setting LIMIT 1
85 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
86 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
87 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
88 (66.995620727539): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294723354 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
89 (39.815902709961): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294723354 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
90 (41.961669921875): 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`
91 (50.067901611328): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (46.014785766602): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (29.087066650391): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (30.994415283203): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
105 (82.969665527344): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
106 (46.968460083008): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
107 (54.121017456055): 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=294723354 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (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_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=294723354 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
109 (162.83988952637): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
110 (61.988830566406): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
111 (60.081481933594): 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=294723354 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (604.15267944336): 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=294723354 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
113 (591.99333190918): 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 (353.09791564941): 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 (101.80473327637): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
116 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
117 (58.174133300781): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
118 (38.862228393555): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
119 (54.836273193359): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
120 (54.836273193359): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
121 (!!!!! 4345.8938598633): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
122 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
123 (329.01763916016): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
124 (!!!!! 23708.10508728): 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
125 (527.85873413086): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294723354 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294723354 AND type='deeppockets_item' AND published='1' LIMIT 1
126 (!!!!! 7324.9340057373): ( 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 (132.08389282227): ( 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 (38.14697265625): 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 (30.040740966797): 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 (92.983245849609): 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 (35.04753112793): 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 (376.93977355957): 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 (38.862228393555): 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 (30.994415283203): 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 (27.894973754883): 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 (548.12431335449): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (353.09791564941): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
138 (57.93571472168): SELECT name FROM jos_deeppockets WHERE id=215
139 (44.107437133789): SELECT name FROM jos_deeppockets WHERE id=215
140 (818.96781921387): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (703.09638977051): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))215((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
142 (82.969665527344): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
143 (81.062316894531): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
144 (!!!!! 14008.045196533): TRUNCATE TABLE jos_trademed_module
145 (174.99923706055): 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=294723354 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (92.029571533203): 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=294723354 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
147 (677.10876464844): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (85.830688476562): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
149 (121.11663818359): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
150 (70.095062255859): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
151 (!!!!! 1950.0255584717): 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
152 (118.97087097168): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
153 (75.817108154297): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
154 (56.982040405273): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294723354 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294723354 AND type='deeppockets_item' AND published='1' LIMIT 1
155 (44.107437133789): 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 (41.007995605469): 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)
157 (56.028366088867): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
158 (104.90417480469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
159 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294723354 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294723354 AND published='1' LIMIT 1
160 (55.074691772461): select jos_twitters.link from jos_twitters where cat=10
161 (37.908554077148): select jos_facebook.link from jos_facebook where cat=10
162 (44.822692871094): select jos_google_plus.link from jos_google_plus where cat=10
163 (37.908554077148): select jos_linkedin.link from jos_linkedin where cat=10