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Arterial Spin Labeling MRI Identifies Evidence of Cognitive Decline Before Symptoms Present

By MedImaging International staff writers
Posted on 16 Oct 2014
Image:  Brain perfusion: Red indicates low perfusion, yellow indicates high perfusion. Overall, the brain perfusion is similar between all three groups (see article). The most prominent difference is present in the posterior cingulate cortex (indicated by the arrow), a region close to the midline in the superior and posterior part of the brain. Control participants who remain stable have higher perfusion as compared to deteriorating controls and MCI (Photo courtesy of RSNA the Radiological Society of North America).
Image: Brain perfusion: Red indicates low perfusion, yellow indicates high perfusion. Overall, the brain perfusion is similar between all three groups (see article). The most prominent difference is present in the posterior cingulate cortex (indicated by the arrow), a region close to the midline in the superior and posterior part of the brain. Control participants who remain stable have higher perfusion as compared to deteriorating controls and MCI (Photo courtesy of RSNA the Radiological Society of North America).
A type of magnetic resonance imaging (MRI) technology is being used to identify signs of cognitive decline in the brain even before symptoms appear. The technique has the potential to be used as a biomarker in very early diagnosis of preclinical dementia.

The World Health Organization (WHO; Geneva, Switzerland) stated that dementia affects more than 35 million people worldwide, a number expected to more than double by 2030. Problems in the brain related to dementia, such as lessened blood flow, might be present for a long time but are not evident because of cognitive reserve, a phenomenon where other areas of the brain compensate for deficits in one region. Early detection of cognitive decline is vital, because treatments for Alzheimer’s disease (AD), the most common type of dementia, are most effective in this early phase.

Researchers recently examined arterial spin labeling (ASL), a new MRI technique that measures brain perfusion and does not require the injection of a contrast agent. “ASL MRI is simple to perform, doesn’t require special equipment and only adds a few minutes to the exam,” said study author Sven Haller, MD, from the University of Geneva (Geneva, Switzerland). The findings were published online October 2014 in the journal Radiology.

The study group included 148 healthy elderly study participants and 65 individuals with mild cognitive impairment (MCI). The participants underwent brain MRI and a neuropsychologic evaluation, a typical battery of tests used to determine cognitive ability. Of the 148 healthy individuals, 75 remained stable, while 73 worsened cognitively at 18 months clinical follow-up. Those who deteriorated had shown reduced perfusion at their baseline ASL MRI scans, especially in the posterior cingulate cortex, an area in the middle of the brain that is associated with the default mode network, the neural network that is active when the brain is not concentrating on a specific task. Declines in this network are seen in MCI patients and are more pronounced in those with Alzheimer’s disease (AD).

The pattern of diminished perfusion in the brains of healthy individuals who went on to develop cognitive deficits was similar to that of patients with MCI. “There is a known close link between neural activity and brain perfusion in the posterior cingulate cortex,” Dr. Haller said. “Less perfusion indicates decreased neural activity.”

The study findings suggest that individuals with decreased perfusion identified with ASL MRI may temporarily maintain their cognitive status through the mobilization of their cognitive reserve, but will ultimately develop slight cognitive deficits.

Previous research conducted with positron emission tomography (PET) imaging, the current gold standard for brain metabolism imaging, revealed that patients with AD had decreased metabolism in the same area of the brain where the perfusion abnormalities were found using ASL MRI. This is evidence of a close association between brain metabolism and perfusion, according to Dr. Haller.

ASL MRI has potential as a standalone test or as an adjunct to PET for dementia screening, Dr. Haller said. While PET can identify markers of AD in the brain and cerebrospinal fluid, it exposes the patient to radiation. ASL does not expose the patient to radiation and is easy to perform in routine clinical settings. “ASL might replace the classic yet unspecific fluordesoxyglucose PET that measures brain metabolism. Instead, PET could be done with the new and specific amyloid PET tracers,” Dr. Haller said.

The findings also support a role for ASL MRI as an alternative to neuropsychologic testing, according to the researchers. They plan to perform follow-up research on the patient group to learn more about ASL and long-term cognitive changes.

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88 (30.040740966797): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294755144 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
89 (33.140182495117): 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 (77.962875366211): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (43.153762817383): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (44.107437133789): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (39.100646972656): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (54.836273193359): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (38.862228393555): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (41.007995605469): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (29.087066650391): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (30.040740966797): 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 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (67.949295043945): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
105 (43.869018554688): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
106 (65.088272094727): 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=294755144 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (58.174133300781): 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=294755144 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
109 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
110 (45.061111450195): 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=294755144 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (577.92663574219): 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=294755144 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (554.80003356934): 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 (316.85829162598): 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 (87.02278137207): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
115 (59.127807617188): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
116 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
117 (37.908554077148): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
118 (41.007995605469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
119 (43.869018554688): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
120 (43.153762817383): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
121 (35.04753112793): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
122 (253.91578674316): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 21569.013595581): 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 (522.85194396973): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294755144 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294755144 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 8681.058883667): ( 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 (109.91096496582): ( 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 (85.830688476562): 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 (46.014785766602): 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 (77.009201049805): 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 (40.054321289062): 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 (472.06878662109): 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 (68.902969360352): 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 (51.021575927734): 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 (40.054321289062): 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 (519.99092102051): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (355.00526428223): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (41.007995605469): SELECT name FROM jos_deeppockets WHERE id=212
138 (30.994415283203): SELECT name FROM jos_deeppockets WHERE id=212
139 (533.10394287109): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (490.90385437012): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (216.96090698242): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
142 (92.983245849609): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
143 (!!!!! 8662.9390716553): TRUNCATE TABLE jos_trademed_module
144 (119.92454528809): 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=294755144 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (85.830688476562): 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=294755144 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (978.94668579102): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (88.930130004883): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
149 (59.127807617188): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
150 (!!!!! 1130.1040649414): 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 (84.877014160156): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
152 (48.87580871582): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
153 (39.100646972656): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294755144 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294755144 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (33.855438232422): 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 (40.054321289062): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (144.95849609375): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
158 (52.928924560547): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294755144 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294755144 AND published='1' LIMIT 1
159 (38.862228393555): select jos_twitters.link from jos_twitters where cat=10
160 (33.140182495117): select jos_facebook.link from jos_facebook where cat=10
161 (46.014785766602): select jos_google_plus.link from jos_google_plus where cat=10
162 (34.093856811523): select jos_linkedin.link from jos_linkedin where cat=10
163 (334.9781036377): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 1009.9411010742): insert into jos_banners_delta values (14615,'2025-06-23 18:32:27','216.73.216.120','view'),(14202,'2025-06-23 18:32:27','216.73.216.120','view'),(14203,'2025-06-23 18:32:27','216.73.216.120','view')