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Perfusion MRI Used to Detect Brain Cancer Early

By MedImaging staff writers
Posted on 22 Apr 2008
A special type of magnetic resonance imaging (MRI) technology, called perfusion MRI, can depict changes in blood volume in the brain that frequently precede cancerous conversion of brain tumors, according to a new study.

"We found that increases in blood volume within the tumor measured noninvasively by perfusion MRI precede other markers of malignant transformation by a year or more,” said study co-author Adam Waldman, Ph.D., M.R.C.P., F.R.C.R., consultant neuroradiologist and imaging research director at Imperial College NHS (UK National Health Service) Trust and honorary senior lecturer from Imperial College and University College, London (UK).

Low-grade gliomas are primary brain tumors that grow gradually over several years. Eventually, almost all low-grade gliomas progress to high-grade gliomas, which carry a poor prognosis. "Patients with low-grade gliomas are often young and may remain clinically well for many years but, at an unpredictable time their tumor will transform to an aggressively high-grade glioma,” Dr. Waldman said.

For the study, the researchers performed perfusion MRI on 13 patients with low-grade gliomas to determine whether relative cerebral blood volume (rCBV) changes are an indicator of future malignant transformation. Brain tumors can generate the formation of new blood vessels, a process known as angiogenesis. These vessels are abnormal and lead to changes in blood volume and flow. Utilizing perfusion MRI, radiologists can detect these changes well before they become apparent on contrast-enhanced MR images.

The patients underwent perfusion MRI and contrast-enhanced MRI every six months for up to three years. Seven patients progressed to high-grade, malignant gliomas between 6 and 36 months. In the six patients whose disease remained stable, rCBV remained relatively stable, increasing from a mean level of 1.31 at the beginning of the study to 1.52 over the follow-up period. However, in the patients exhibiting tumor transformation, mean rCBV increased progressively from 1.94 at study entry to 3.14, 12 months prior to transformation, to 3.65 six months prior to transformation, and to 5.36 at the time transformation was diagnosed.

These study results suggest that significant changes in rCBV represent an important marker of malignant change in gliomas and reflect the earliest stages of the transformation process. Furthermore, the data support the likelihood that the cellular processes underlying malignant transformation may occur 12 months or more before visible on contrast MRI.

"We have shown that perfusion MRI provides a noninvasive means of assessing the risk of transformation in individual patients,” Dr. Waldman said. "Increasing perfusion can be regarded as an early warning sign of impending malignant transformation that can assist radiologists in identifying those patients most likely to benefit from earlier or more aggressive treatment.”

The study was published in the April 2008 issue of the journal Radiology.


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97 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (40.769577026367): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (62.942504882812): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
105 (44.107437133789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
106 (48.87580871582): 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=278990000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (46.968460083008): 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=278990000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (113.96408081055): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
109 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
110 (406.02684020996): 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=278990000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (497.10273742676): 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=278990000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (670.9098815918): 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 (399.11270141602): 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 (79.154968261719): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
115 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
116 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
117 (39.100646972656): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
118 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
119 (37.908554077148): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
120 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
121 (36.954879760742): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
122 (211.95411682129): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 20431.995391846): 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 (436.78283691406): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=278990000 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=278990000 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 7555.0079345703): ( 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 (78.916549682617): ( 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 (36.954879760742): 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 (29.802322387695): 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 (36.001205444336): 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 (27.894973754883): 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 (234.84230041504): 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 (74.148178100586): 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 (29.087066650391): 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 (342.84591674805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (224.82872009277): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (133.99124145508): SELECT name FROM jos_deeppockets WHERE id=212
138 (31.948089599609): SELECT name FROM jos_deeppockets WHERE id=212
139 (581.97975158691): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (431.77604675293): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (93.936920166016): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
142 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
143 (!!!!! 7766.0083770752): TRUNCATE TABLE jos_trademed_module
144 (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=278990000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (53.882598876953): 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=278990000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (821.11358642578): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (54.121017456055): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (49.829483032227): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
149 (41.007995605469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
150 (!!!!! 1077.1751403809): 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 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
152 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
153 (36.001205444336): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=278990000 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=278990000 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (28.133392333984): 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 (27.179718017578): 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 (26.941299438477): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (63.896179199219): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
158 (42.915344238281): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=278990000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=278990000 AND published='1' LIMIT 1
159 (86.784362792969): select jos_twitters.link from jos_twitters where cat=10
160 (36.001205444336): 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 (31.948089599609): select jos_linkedin.link from jos_linkedin where cat=10
163 (313.99726867676): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (946.99859619141): insert into jos_banners_delta values (14615,'2025-06-30 15:57:22','216.73.216.249','view'),(14202,'2025-06-30 15:57:22','216.73.216.249','view'),(14203,'2025-06-30 15:57:22','216.73.216.249','view')