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New Technique that Could Significantly Simplify Hyperpolarized MRI Paves Way for Major Advances

By MedImaging International staff writers
Posted on 30 Apr 2021
Image: Hyperpolarization of fumarate for use as a biosensor (Photo courtesy of John Blanchard, James Eills)
Image: Hyperpolarization of fumarate for use as a biosensor (Photo courtesy of John Blanchard, James Eills)
Researchers have developed a new technique that could significantly simplify hyperpolarized magnetic resonance imaging (MRI), which developed around 20 years ago for observing metabolic processes in the body, and pave the way for major advances in MRI.

An interdisciplinary team of researchers led by Johannes Gutenberg University Mainz (JGU; Mainz, Germany) discovered the promising new concept that involves the hyperpolarization of the metabolic product fumarate using parahydrogen and the subsequent purification of the metabolite.

The potential applications of MRI are hindered by its low sensitivity and the technique is essentially limited to observing water molecules in the body. Researchers are therefore constantly working on different ways of improving MRI. A major breakthrough was achieved around 20 years ago when hyperpolarized magnetic resonance imaging was first developed: Because hyperpolarized molecules emit significantly stronger MRI signals, substances that are only present in low concentrations in the body can also be visualized. By hyperpolarizing biomolecules and introducing them in patients, it is possible to track metabolism in real time, thus providing doctors with much more information.

Hyperpolarized fumarate is a promising biosensor for the imaging of metabolic processes. Fumarate is a metabolite of the citric acid cycle that plays an important role in the energy production of living beings. For imaging purposes, the fumarate is tagged with carbon-13 as the atomic nuclei of this isotope can be hyperpolarized. Dynamic nuclear polarization is the current state-of-the-art method for hyperpolarizing fumarate, but this is expensive and relatively slow. The equipment required costs one to two million Euros.

Dynamic nuclear polarization is very difficult to use in everyday clinical practice due to the related high costs and technical complexity. Using parahydrogen, the research team was able to hyperpolarize this important biomolecule in a cost-effective and convenient way. However, parahydrogen-induced polarization, or PHIP for short, also has its disadvantages. The low level of polarization and the large number of unwanted accompanying substances are particularly problematic in the case of this chemistry-based technique. Among other things, transferring the polarization from parahydrogen into fumarate requires a catalyst, which remains in the reaction fluid just like other reaction side-products.

The solution to this problem is to purify the hyperpolarized fumarate through precipitation. The fumarate then takes the form of a purified solid and can be redissolved at the desired concentration later. This creates a product from which all toxic substances have been removed, making it ready to be used in the body. In addition, compared to previous experiments with PHIP, the polarization is increased to remarkable 30 to 45%. Preclinical studies have already shown that hyperpolarized fumarate imaging is a suitable method of monitoring how tumors respond to therapy as well as for imaging acute kidney injuries or the effects of myocardial infarction. This new way of producing hyperpolarized fumarate should greatly accelerate preclinical studies and bring this technology to more laboratories.

"This technique would not only be simpler, but also much cheaper than the previous procedure," said leader of the project Dr. James Eills, a member of the research team of Professor Dmitry Budker at Johannes Gutenberg University Mainz (JGU) and the Helmholtz Institute Mainz (HIM).

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90 (67.949295043945): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (40.054321289062): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (79.154968261719): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (41.961669921875): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (46.014785766602): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (95.844268798828): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
105 (59.843063354492): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
106 (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.cat=10 AND dp.id=294788088 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (66.041946411133): 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=294788088 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (99.18212890625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
109 (61.988830566406): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
110 (69.141387939453): 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=294788088 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (607.96737670898): 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=294788088 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (710.96420288086): 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 (455.14106750488): 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 (150.91896057129): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
115 (82.015991210938): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
116 (87.976455688477): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
117 (53.882598876953): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
118 (83.92333984375): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
119 (55.074691772461): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
120 (334.9781036377): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
121 (!!!!! 27276.039123535): 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 (133.03756713867): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
123 (63.896179199219): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
124 (586.98654174805): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294788088 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294788088 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 1249117.1360016): ( 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 (!!!!! 770781.99386597): ( 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 (113.01040649414): 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 (42.915344238281): 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 (57.93571472168): 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 (38.862228393555): 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 (43.153762817383): 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 (41.007995605469): 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 (!!!!! 1595.0202941895): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
134 (840.90232849121): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
135 (547.88589477539): SELECT name FROM jos_deeppockets WHERE id=212
136 (46.968460083008): SELECT name FROM jos_deeppockets WHERE id=212
137 (653.02848815918): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
138 (658.03527832031): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
139 (!!!!! 1872.0626831055): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
140 (211.95411682129): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
141 (!!!!! 16109.943389893): TRUNCATE TABLE jos_trademed_module
142 (!!!!! 2334.1178894043): 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=294788088 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
143 (!!!!! 1261.9495391846): 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=294788088 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
144 (834.94186401367): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
145 (532.15026855469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
146 (284.91020202637): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
147 (687.1223449707): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
148 (!!!!! 1707.0770263672): 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 (!!!!! 1282.9303741455): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
150 (252.00843811035): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
151 (664.94941711426): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294788088 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294788088 AND type='deeppockets_item' AND published='1' LIMIT 1
152 (139.95170593262): 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)
153 (700.95062255859): 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)
154 (56.982040405273): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
155 (!!!!! 1172.0657348633): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
156 (128.03077697754): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294788088 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294788088 AND published='1' LIMIT 1
157 (60.081481933594): select jos_twitters.link from jos_twitters where cat=10
158 (41.007995605469): select jos_facebook.link from jos_facebook where cat=10
159 (79.870223999023): select jos_google_plus.link from jos_google_plus where cat=10
160 (41.007995605469): select jos_linkedin.link from jos_linkedin where cat=10
161 (347.13745117188): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
162 (!!!!! 1500.8449554443): insert into jos_banners_delta values (14615,'2025-06-17 21:05:09','216.73.216.120','view'),(14202,'2025-06-17 21:05:09','216.73.216.120','view'),(14203,'2025-06-17 21:05:09','216.73.216.120','view')