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Breast CT Imaging System Easier on Women

By MedImaging International staff writers
Posted on 29 Dec 2010
While not a frontline screening tool, cone beam computed tomography (CBCT) might help diagnose difficult breast cancer cases.

Radiologist Avice O'Connell, MD, from the University of Rochester Medical Center (URMC; Rochester, NY, USA), summarized the studies conducted thus far on the cone beam computed tomography (CBCT) scanner, at the Radiological Society of North America annual scientific assembly in Chicago, IL, USA November 28 to December 3, 2010. More...
Dr. O'Connell is optimistic about the progress: The CBCT provides high-quality images, and significantly, is easier on women because it allows accurate breast scans without having to pull, flatten, and compress the tissue.

Moreover, early research showed that breast coverage and radiation dose is comparable to mammography. However, at this time researchers do not believe the CBCT is likely to replace mammography as a frontline screening tool. More studies are needed to verify its best usage in the clinic. "The CBCT imaging system has some significant advantages over current imaging modalities however its greatest potential may be as an additional tool for diagnosing difficult cases. It could be extremely useful in locating tumors that are obscured by dense breast tissue, or distinguishing between benign and malignant lesions,” said Dr. O'Connell, associate professor in imaging sciences and director of women's imaging for the Comprehensive Breast Care Center at the James P. Wilmot Cancer at URMC.

A team of URMC researchers introduced the CBCT system at the 2006 RSNA meeting. The CBCT scanner produces three-dimensional images while the breasts are in a more natural state. (Tomosynthesis is another new technology being developed for breast screening. It constructs a 3D image of the breast using multiple X-rays, whereas the CBCT is an actual 3D image, according to Dr. O'Connell) The patient undergoing a CBCT scan lies on her stomach on a cushioned exam table--the design of which is still being improved--as one breast at a time is suspended through an opening in the table. The radiation source is positioned so that exposure to the chest or other areas of the torso can be avoided.

The scanner takes 300 high-resolution images while circling the breasts for approximately 10 seconds, emitting a radiation dose that is similar to a diagnostic mammogram and within the limits set by the US Food and Drug Administration. Radiologists will also be able to use the CBCT images and related software to perform biopsies directly on the table, according to Dr. O'Connell.

Dr. O'Connell presented her findings at RSNA, which included an initial trial of 23 women who were known to be cancer-free and to have had routine, normal, screening mammograms, also volunteered to undergo scans on the CBCT system. The study's only objectives were to evaluate image quality, coverage, and radiation dose. Some of the volunteers had dense breasts, which are more difficult to screen and often require a higher dose of radiation to obtain additional views if a problem is suspected. Dense breast tissue is rather common: at least 25% of all women undergoing screening mammography, and particularly younger women and those who take hormone therapy, have dense tissue, which can greatly reduce the sensitivity of mammography.

Researchers discovered that the CBCT provided quality images of the entire breast, from the chest wall to the nipple, with a contrast resolution that was adequate to detect masses and calcifications 1 mm or larger. The study was published in August 2010 in the American Journal of Radiology.

A follow-up study of 42 women included volunteers who were known to have abnormal mammograms and in need of a biopsy. Researchers compared the mammography images to those from the CBCT scanner. The CBCT detected all abnormalities and cancerous lesions, O'Connell said. Data from this study is being presented for the first time at RSNA 2010, and has not yet been published in a peer-reviewed journal.

Dr. O'Connell has begun a new clinical trial in collaboration with the University of Massachusetts (Worchester, USA). The objective is to compare CBCT and mammography images of 75 lesions and 75 calcifications to the pathology reports from the biopsies. This will allow researchers to evaluate the accuracy of the scans further.

Additional studies are planned to investigate the use of CBCT for those who cannot receive an magnetic resonance imaging (MRI), for women with silicone breast implant ruptures, and to assess the response to breast cancer treatment in cases where the disease is more advanced at diagnosis. "As our studies continue, we are very excited about the potential of this technology and look forward to exploring many uses for the CBCT scanner in the clinic,” Dr. O'Connell added.

Related Links:
University of Rochester Medical Center


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77 (38.14697265625): SELECT show_live FROM jos_com_show_setting LIMIT 1
78 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
79 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
80 (39.100646972656): SELECT show_live FROM jos_com_show_setting LIMIT 1
81 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
82 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
83 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
84 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
85 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
86 (38.14697265625): SELECT show_live FROM jos_com_show_setting LIMIT 1
87 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
88 (77.962875366211): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294732720 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
89 (42.915344238281): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294732720 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
90 (46.968460083008): 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 (77.962875366211): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (43.869018554688): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (41.007995605469): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (34.809112548828): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (34.093856811523): SELECT show_live FROM jos_com_show_setting LIMIT 1
105 (112.05673217773): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
106 (64.849853515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
107 (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 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=294732720 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (70.095062255859): 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=294732720 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
109 (107.0499420166): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
110 (63.896179199219): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
111 (65.803527832031): 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=294732720 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (694.03648376465): 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=294732720 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
113 (770.80726623535): 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 (580.0724029541): 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 (185.96649169922): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
116 (72.956085205078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
117 (70.810317993164): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
118 (51.975250244141): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
119 (78.916549682617): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
120 (58.889389038086): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
121 (72.956085205078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
122 (55.074691772461): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
123 (418.90144348145): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
124 (!!!!! 29417.991638184): 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 (769.85359191895): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294732720 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294732720 AND type='deeppockets_item' AND published='1' LIMIT 1
126 (!!!!! 11368.989944458): ( 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 (137.0906829834): ( 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 (83.92333984375): 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 (45.061111450195): 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 (96.08268737793): 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 (41.007995605469): 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 (473.97613525391): 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 (56.028366088867): 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 (53.882598876953): 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 (40.054321289062): 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 (587.94021606445): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (663.99574279785): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
138 (71.048736572266): SELECT name FROM jos_deeppockets WHERE id=211
139 (45.7763671875): SELECT name FROM jos_deeppockets WHERE id=211
140 (846.14753723145): 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 '((;)|(^))211((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (751.97219848633): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))211((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
142 (123.02398681641): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
143 (86.069107055664): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
144 (!!!!! 13665.914535522): TRUNCATE TABLE jos_trademed_module
145 (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=294732720 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (82.015991210938): 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=294732720 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
147 (665.90309143066): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (80.82389831543): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
149 (84.877014160156): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
150 (62.942504882812): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
151 (!!!!! 1763.1053924561): 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 (165.93933105469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
153 (86.069107055664): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
154 (58.889389038086): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294732720 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294732720 AND type='deeppockets_item' AND published='1' LIMIT 1
155 (102.04315185547): 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=211 or channel_id is null)
156 (53.882598876953): 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=211 or channel_id is null)
157 (59.843063354492): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
158 (100.85105895996): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
159 (68.902969360352): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294732720 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294732720 AND published='1' LIMIT 1
160 (61.03515625): select jos_twitters.link from jos_twitters where cat=10
161 (38.14697265625): select jos_facebook.link from jos_facebook where cat=10
162 (39.100646972656): select jos_google_plus.link from jos_google_plus where cat=10
163 (45.061111450195): select jos_linkedin.link from jos_linkedin where cat=10
164 (388.86070251465): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
165 (!!!!! 1385.9272003174): insert into jos_banners_delta values (14615,'2025-08-20 14:49:18','216.73.216.0','view'),(14202,'2025-08-20 14:49:18','216.73.216.0','view'),(14203,'2025-08-20 14:49:18','216.73.216.0','view')