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Artificial Intelligence Could Help Reduce Gadolinium Dose in MRI

By MedImaging International staff writers
Posted on 18 Dec 2018
Image: Example of full-dose, 10 percent low-dose and algorithm-enhanced low-dose (Photo courtesy of RSNA).
Image: Example of full-dose, 10 percent low-dose and algorithm-enhanced low-dose (Photo courtesy of RSNA).
Researchers from Stanford University (Stanford, CA, USA) are using artificial intelligence (AI) to reduce the dose of a contrast agent that may be left behind in the body after MRI exams.

Gadolinium is a heavy metal used in contrast material that enhances MRI images. Recent studies have found that trace amounts of the metal remain in the bodies of people who have undergone exams with certain types of gadolinium. The effects of this deposition are not yet known, although radiologists are working to optimize patient safety while simultaneously preserving the important information provided by gadolinium-enhanced MRI scans. The Stanford researchers have been doing this by studying deep learning, a sophisticated AI technique that teaches computers by examples. By using models called convolutional neural networks, computers can recognize images as well as find subtle distinctions among the imaging data that a human observer might be incapable of discerning.

In order to train the deep learning algorithm, the researchers used MR images from 200 patients who had received contrast-enhanced MRI exams for various indications. They collected three sets of images for each patient: pre-contrast scans, done prior to contrast administration and referred to as the zero-dose scans; low-dose scans, acquired after 10% of the standard gadolinium dose administration; and full-dose scans, acquired after 100% dose administration. The algorithm learned to approximate the full-dose scans from the zero-dose and low-dose images. Neuroradiologists then evaluated the images for contrast enhancement and overall quality.

The results showed that the image quality was not significantly different between the low-dose, algorithm-enhanced MR images and the full-dose, contrast-enhanced MR images. The initial results also demonstrated the potential for creating the equivalent of full-dose, contrast-enhanced MR images without any contrast agent use. These findings suggest the method’s potential for dramatically reducing gadolinium dose without sacrificing diagnostic quality. Future research in the clinical setting will focus on evaluation of the algorithm across a broader range of MRI scanners and with different types of contrast agents.

“Low-dose gadolinium images yield significant untapped clinically useful information that is accessible now by using deep learning and AI,” said study lead author Enhao Gong, Ph.D., researcher at Stanford University. “We’re not trying to replace existing imaging technology. We’re trying to improve it and generate more value from the existing information while looking out for the safety of our patients.”

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96 (34.093856811523): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (27.894973754883): 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 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (55.074691772461): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (79.870223999023): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
105 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
106 (49.829483032227): 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=294776131 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (521.89826965332): 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=294776131 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (114.91775512695): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
109 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
110 (51.975250244141): 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=294776131 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (581.97975158691): 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=294776131 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (658.98895263672): 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 (410.07995605469): 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 (77.962875366211): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
115 (60.081481933594): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
116 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
117 (41.007995605469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
118 (64.13459777832): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
119 (43.869018554688): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
120 (347.13745117188): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
121 (!!!!! 48177.95753479): 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
122 (84.161758422852): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
123 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
124 (503.0632019043): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294776131 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294776131 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 1036932.9452515): ( 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 (!!!!! 4140.1386260986): ( 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 (643.96858215332): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800513 LIMIT 1
128 (874.04251098633): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800513 LIMIT 1
129 (824.92828369141): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800359 LIMIT 1
130 (!!!!! 2223.9685058594): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800359 LIMIT 1
131 (149.96528625488): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800361 LIMIT 1
132 (109.91096496582): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800361 LIMIT 1
133 (472.06878662109): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
134 (396.9669342041): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
135 (62.942504882812): SELECT name FROM jos_deeppockets WHERE id=217
136 (39.815902709961): SELECT name FROM jos_deeppockets WHERE id=217
137 (554.08477783203): 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 '((;)|(^))217((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
138 (509.02366638184): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))217((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
139 (78.916549682617): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
140 (56.028366088867): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
141 (!!!!! 10121.822357178): TRUNCATE TABLE jos_trademed_module
142 (575.06561279297): 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=294776131 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
143 (538.11073303223): 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=294776131 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
144 (597.00012207031): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
145 (71.048736572266): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
146 (133.99124145508): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
147 (114.20249938965): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
148 (!!!!! 1555.9196472168): 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
149 (90.122222900391): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
150 (58.889389038086): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
151 (47.922134399414): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294776131 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294776131 AND type='deeppockets_item' AND published='1' LIMIT 1
152 (37.908554077148): 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=217 or channel_id is null)
153 (36.954879760742): 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=217 or channel_id is null)
154 (41.007995605469): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
155 (130.89179992676): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
156 (74.863433837891): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294776131 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294776131 AND published='1' LIMIT 1
157 (93.936920166016): select jos_twitters.link from jos_twitters where cat=10
158 (37.908554077148): select jos_facebook.link from jos_facebook where cat=10
159 (35.04753112793): select jos_google_plus.link from jos_google_plus where cat=10
160 (33.140182495117): select jos_linkedin.link from jos_linkedin where cat=10
161 (356.91261291504): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
162 (!!!!! 5096.9123840332): insert into jos_banners_delta values (14615,'2025-06-17 14:24:25','216.73.216.120','view'),(14202,'2025-06-17 14:24:25','216.73.216.120','view'),(14203,'2025-06-17 14:24:25','216.73.216.120','view')