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Collaboration to Make Diagnostic Medical Imaging Less Hazardous Using Hyperpolarization Agents

By MedImaging International staff writers
Posted on 23 Oct 2014
Image: A collaborative effort between EPFL, CNRS, ENS Lyon, CPE Lyon, and ETH Zürich has led to the development of a novel approach that can considerably improve the capabilities of medical imaging with safer procedures for the patient (Photo courtesy of EPFL - Ecole Polytechnique Fédérale de Lausanne).
Image: A collaborative effort between EPFL, CNRS, ENS Lyon, CPE Lyon, and ETH Zürich has led to the development of a novel approach that can considerably improve the capabilities of medical imaging with safer procedures for the patient (Photo courtesy of EPFL - Ecole Polytechnique Fédérale de Lausanne).
A collaborative effort by scientists has led to the development of an innovative strategy that can considerably improve the capabilities of medical imaging with safer procedures for the patient.

Medical imaging is a significant part of healthcare today, with imaging techniques such as magnetic resonance imaging (MRI), computed tomography (CT) scanning, and nuclear magnetic resonance (NMR) increasing greatly over the last 20 years. However, continuing problems of image resolution and quality still hinder these techniques because of the nature of living tissue. A solution is hyperpolarization, which involves injecting the patient with substances that can enhance imaging quality by following the distribution and fate of specific molecules in the body but that can be harmful or potentially toxic to the patient.

A team of scientists from Ecole Polytechnique Fédérale de Lausanne (EPFL; Switzerland), Le Centre National de la Recherche Scientifique (CNRS; Paris, France), ENS Lyon ( École Normale Supérieure de Lyon; France), and CPE Lyon (France), and Swiss Federal Institute of Technology in Zurich (ETH Zürich; Switzerland) has developed a new generation of hyperpolarization agents that can be used to dramatically enhance the signal intensity of imaged body tissues without presenting any danger to the patient. Their research was published September 29, 2014, in the journal Proceedings of the National Academy of Sciences of the United States of America (PNAS).

The team of scientists coordinated by Dr. Lyndon Emsley, a professor at EPFL and ENS Lyon, has developed a new generation of hyperpolarizing agents that are both effective and safe for the patient. The substances, called HYPSOs, were developed by the teams of Christophe Copéret at ETH Zurich and Chloé Thieuleux at CPE-Lyon. The HYPSOs come in the form of a fine, white, porous powder that contains the “tracking” molecules to be hyperpolarized. The HYPSO powder is comprised of mesoporous silica (silicon dioxide), which is the major component of sand and is commonly used in nanotechnology.

The silica powder used for the HYPSOs consists of particles, containing pore channels. It has been designed in such a way that the surface of each pore channel can be evenly covered with molecules known as “organic radicals.” The radicals are homogeneously distributed, and are able to induce polarization around them. The pore channels are then filled with a solution of the “tracking” molecules to be hyperpolarized, which act as markers for the imaging—e.g., pyruvate, which is important in the production of energy in cells.

Using novel instruments and methods developed by Dr. Sami Jannin at EPFL, the HYPSO sample is hyperpolarized with microwaves in a magnetic field at a very low temperature. The magnetic moments of the atoms are forced to align through a process called “dynamic nuclear polarization,” which transfers the spin energy of the free radicals’ electrons to the markers’ nuclei. The electronic spin magnetism of the hyperpolarizing agent acts on the marker molecule, aligning, or “polarizing,” the nuclei of its atoms.

Hot water is then used to melt and flush the substrate out of the powder. Because of the equipment and conditions needed, the process generally takes place in a room adjacent to the imaging facility. The substrate is then injected through a long tube into the patient inside the medical imaging device. The entire process only lasts about 10 seconds.
Two scans are performed, one with and one without the hyperpolarized agent. When the two images are compared, it is possible to observe the distribution of the hyperpolarized marker in the patient’s body, which, depending on the medical setting, can be indicative of disease. For example, accumulation of pyruvate in the prostate could be an early indication of prostate cancer.

The researchers have evaluated the effectiveness of the HYPSOs technology on several imaging markers, including pyruvate, acetate, fumarate, pure water, and a simple peptide. Because the HYPSOs is physically retained during dissolution, the technique generates pure solutions of hyperpolarized markers, free of any contaminant. The protocol is therefore simpler and potentially safer for the patient, while its dramatic efficiency on signal quality forecasts the use of this new generation of hyperpolarized agents with a broad range of molecules. As Dr. Jannin pointed out, “We have now received queries of scientists from abroad who are eager to boost their research with this new technology. Amongst other plans, we are very excited about testing these materials in vivo.”

Related Links:

Ecole Polytechnique Fédérale de Lausanne
Le Centre National de la Recherche Scientifique
ENS Lyon


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82 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
83 (69.856643676758): SELECT show_live FROM jos_com_show_setting LIMIT 1
84 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
85 (41.007995605469): SELECT show_live FROM jos_com_show_setting LIMIT 1
86 (32.901763916016): SELECT show_live FROM jos_com_show_setting LIMIT 1
87 (43.869018554688): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294755297 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
88 (30.040740966797): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294755297 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
89 (31.948089599609): 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 (48.160552978516): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (29.802322387695): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (33.140182495117): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (67.949295043945): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
105 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
106 (47.922134399414): 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=294755297 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (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=294755297 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (!!!!! 3027.9159545898): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
109 (103.95050048828): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
110 (68.902969360352): 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=294755297 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (699.04327392578): 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=294755297 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (733.1371307373): 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 (!!!!! 1590.9671783447): 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 (137.0906829834): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
115 (78.916549682617): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
116 (77.009201049805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
117 (59.843063354492): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
118 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
119 (52.213668823242): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
120 (69.141387939453): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
121 (55.074691772461): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
122 (379.08554077148): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 41720.867156982): 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 (604.86793518066): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294755297 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294755297 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 10115.8618927): ( 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 (87.976455688477): ( 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 (74.148178100586): 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 (43.869018554688): 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 (58.889389038086): 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 (36.954879760742): 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 (354.05158996582): 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 (86.069107055664): 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 (41.961669921875): 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 (36.001205444336): 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 (591.99333190918): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (461.10153198242): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (269.17457580566): SELECT name FROM jos_deeppockets WHERE id=215
138 (43.869018554688): SELECT name FROM jos_deeppockets WHERE id=215
139 (731.22978210449): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (700.95062255859): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))215((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (88.930130004883): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
142 (66.995620727539): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
143 (!!!!! 9781.1222076416): TRUNCATE TABLE jos_trademed_module
144 (122.0703125): 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=294755297 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (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_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=294755297 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (849.96223449707): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (62.942504882812): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (61.988830566406): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
149 (47.206878662109): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
150 (!!!!! 1163.0058288574): 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 (71.048736572266): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
152 (43.153762817383): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
153 (61.988830566406): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294755297 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294755297 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (48.87580871582): 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 (33.140182495117): 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 (33.855438232422): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (181.91337585449): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
158 (77.962875366211): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755297 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755297 AND published='1' LIMIT 1
159 (65.803527832031): select jos_twitters.link from jos_twitters where cat=10
160 (41.007995605469): select jos_facebook.link from jos_facebook where cat=10
161 (40.054321289062): select jos_google_plus.link from jos_google_plus where cat=10
162 (39.815902709961): select jos_linkedin.link from jos_linkedin where cat=10
163 (288.96331787109): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14202,14203)
164 (!!!!! 1267.1947479248): insert into jos_banners_delta values (14202,'2025-06-23 11:45:43','216.73.216.120','view'),(14203,'2025-06-23 11:45:43','216.73.216.120','view')