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Magnetic Field Correlation MRI Reveals Low Brain Iron in ADHD Patients

By MedImaging International staff writers
Posted on 17 Dec 2013
Image: Medication-naïve ADHD patients (ADHD-nonmedicated) have reduced striatal (putamen (PUT), caudate nucleus (CN)) and thalamic (THL) magnetic field correlation (MFC) measures of brain iron compared to controls and psychostimulant medicated ADHD patients (ADHD-medicated); Brain iron measures in PUT, CN, THL or globus pallidus (GP) did not differ between controls and psychostimulant medicated ADHD patients. These statistical significant differences are visible in the MFC group maps (top row) but not in conventional relaxation rate maps: R2 (second row), R2*(third row), and R2\' (bottom row) (Photo courtesy of RSNA).
Image: Medication-naïve ADHD patients (ADHD-nonmedicated) have reduced striatal (putamen (PUT), caudate nucleus (CN)) and thalamic (THL) magnetic field correlation (MFC) measures of brain iron compared to controls and psychostimulant medicated ADHD patients (ADHD-medicated); Brain iron measures in PUT, CN, THL or globus pallidus (GP) did not differ between controls and psychostimulant medicated ADHD patients. These statistical significant differences are visible in the MFC group maps (top row) but not in conventional relaxation rate maps: R2 (second row), R2*(third row), and R2\' (bottom row) (Photo courtesy of RSNA).
Image: Photograph of a Siemens Healthcare (Erlangen, Germany) Magnetom Trio MRI scanner (Photo courtesy of RSNA).
Image: Photograph of a Siemens Healthcare (Erlangen, Germany) Magnetom Trio MRI scanner (Photo courtesy of RSNA).
A new magnetic resonance imaging (MRI) technique offers a noninvasive way to measure iron levels in the brains of individuals with attention deficit hyperactivity disorder (ADHD).

The new findings were presented December 2013 at the annual meeting of the Radiological Society of North America (RSNA), held in Chicago (IL, USA). Researchers reported that the imaging technology could help physicians and parents make better informed decisions about medication.

ADHD is a common disorder in children and adolescents that can continue into adulthood. Symptoms include hyperactivity and difficulty staying focused, paying attention, and controlling behavior. The American Psychiatric Association reports that ADHD affects 3%–7% of school-age children.

Psychostimulant drugs such as Ritalin are among the drugs typical used to decrease ADHD symptoms. Psychostimulants affect levels of dopamine, a neurotransmitter in the brain associated with addiction. “Studies show that psychostimulant drugs increase dopamine levels and help the kids that we suspect have lower dopamine levels,” said Vitria Adisetiyo, PhD, postdoctoral research fellow at the Medical University of South Carolina (Charleston, SC, USA). “As brain iron is required for dopamine synthesis, assessment of iron levels with MRI may provide a noninvasive, indirect measure of dopamine.”

Dr. Adisetiyo and colleagues explored this possibility by measuring brain iron in 22 children and adolescents with ADHD and 27 healthy control children and adolescents employing an MRI technique called magnetic field correlation (MFC) imaging. The technique is comparatively new, having been introduced in 2006 by study coauthors and faculty members Joseph A. Helpern, PhD, and Jens H. Jensen, PhD. “MRI relaxation rates are the more conventional way to measure brain iron, but they are not very specific,” Dr. Adisetiyo said. “We added MFC because it offers more refined specificity.”

The findings demonstrated that the 12 ADHD patients who had never been on medication had substantially lower MFC than the 10 ADHD patients who had been on psychostimulant drugs or the 27 typically developing children and adolescents in the control group. In contrast, no significant group differences were detected using relaxation rates or serum measures. The lower brain iron levels in the nonmedicated group appeared to normalize with psychostimulant medication.

MFC imaging’s ability to identify noninvasively the low iron levels may help improve ADHD diagnosis and guide optimal treatment. Noninvasive techniques are especially important in a pediatric population, Dr. Adisetiyo noted. “This method enables us to exploit inherent biomarkers in the body and indirectly measure dopamine levels without needing any contrast agent,” she said.

If the findings can be repeated in larger studies, then MFC might have a future role in determining which patients would benefit from psychostimulants—an important consideration because the drugs can become addictive in some patients and lead to abuse of other psychostimulant drugs such as cocaine. “It would be beneficial when the psychiatrist is less confident of a diagnosis if you could put a patient in a scanner for 15 minutes and confirm that brain iron is low,” she concluded. “And we could possibly identify kids with normal iron levels who could potentially become addicts.”

Combined with replicating the findings in a larger population of patients, the researchers plan to expand their studies to look at the relationship between cocaine addiction and brain iron.

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Medical University of South Carolina


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83 (29.087066650391): SELECT show_live FROM jos_com_show_setting LIMIT 1
84 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
85 (29.087066650391): SELECT show_live FROM jos_com_show_setting LIMIT 1
86 (37.193298339844): SELECT show_live FROM jos_com_show_setting LIMIT 1
87 (90.122222900391): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294749735 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
88 (31.948089599609): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294749735 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
89 (34.093856811523): 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 (83.92333984375): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (42.200088500977): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (41.961669921875): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (42.915344238281): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (38.862228393555): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (41.961669921875): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (39.100646972656): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (111.10305786133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
105 (62.942504882812): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
106 (85.115432739258): 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=294749735 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (74.863433837891): 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=294749735 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (113.01040649414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
109 (68.187713623047): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
110 (77.962875366211): 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=294749735 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (618.93463134766): 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=294749735 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (722.16987609863): 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 (517.12989807129): 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 (104.18891906738): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
115 (86.069107055664): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
116 (89.168548583984): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
117 (55.074691772461): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
118 (61.988830566406): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
119 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
120 (92.029571533203): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
121 (43.153762817383): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
122 (313.04359436035): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 22343.873977661): 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 (397.92060852051): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294749735 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294749735 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 7509.9468231201): ( 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 (87.02278137207): ( 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 (52.928924560547): 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 (33.140182495117): 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 (84.877014160156): 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 (44.107437133789): 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 (318.05038452148): 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 (46.014785766602): 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 (31.948089599609): 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 (28.133392333984): 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 (441.07437133789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (252.00843811035): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (36.954879760742): SELECT name FROM jos_deeppockets WHERE id=212
138 (30.040740966797): SELECT name FROM jos_deeppockets WHERE id=212
139 (553.13110351562): 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 '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (488.9965057373): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (77.009201049805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
142 (43.153762817383): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
143 (!!!!! 8430.004119873): TRUNCATE TABLE jos_trademed_module
144 (98.943710327148): 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=294749735 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (56.982040405273): 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=294749735 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (866.17469787598): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (64.849853515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (67.949295043945): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
149 (46.968460083008): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
150 (!!!!! 1079.0824890137): 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 (53.882598876953): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
152 (40.054321289062): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
153 (36.954879760742): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294749735 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294749735 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (29.802322387695): 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=212 or channel_id is null)
155 (31.948089599609): 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=212 or channel_id is null)
156 (36.001205444336): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (136.13700866699): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
158 (50.067901611328): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294749735 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294749735 AND published='1' LIMIT 1
159 (39.100646972656): select jos_twitters.link from jos_twitters where cat=10
160 (30.040740966797): select jos_facebook.link from jos_facebook where cat=10
161 (30.994415283203): select jos_google_plus.link from jos_google_plus where cat=10
162 (30.994415283203): select jos_linkedin.link from jos_linkedin where cat=10
163 (339.03121948242): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 1168.966293335): insert into jos_banners_delta values (14615,'2025-06-24 10:21:40','216.73.216.120','view'),(14202,'2025-06-24 10:21:40','216.73.216.120','view'),(14203,'2025-06-24 10:21:40','216.73.216.120','view')