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High-Energy Ultrasound Provides Clearer View of Liver Tumors

By MedImaging staff writers
Posted on 28 Jan 2008
Image: Colored ultrasound scan of a malignant tumor (red) in a patient’s liver (Photo courtesy of Camal, ISM / SPL).
Image: Colored ultrasound scan of a malignant tumor (red) in a patient’s liver (Photo courtesy of Camal, ISM / SPL).
A high-energy form of ultrasound imaging generates images of liver tumors that are better than those made with traditional ultrasound, according to results from a clinical study.

The study, performed by researchers from Duke University's Pratt School of Engineering (Durham, NC, USA), suggests that the imaging method known as acoustic radiation force impulse (ARFI) ultrasound might offer a new tool for screening patients at increased risk for liver cancers, according to the researchers. They reported that it might also play a useful role in guiding biopsy procedures and minimally invasive therapies geared at destroying cancerous tissues found deep in the abdomen.

The researchers reported their findings January 7, 2008, in the journal Physics in Medicine and Biology. The work was funded by the U.S. National Institutes of Health (Bethesda, MD, USA) with system support from Siemens Medical Solutions (Erlangen, Germany).

First developed six years ago by Duke biomedical engineers Drs. Gregg Trahey and Kathy Nightingale, ARFI uses high-energy sound waves to push on tissues like sonic fingers. A tracking beam then captures the movement of the tissue, providing a measure of its elasticity or stiffness.

"To our knowledge, these are the first images of abdominal malignancies in humans that show tissue elasticity,” said Dr. Trahey, professor of biomedical engineering, radiology, and medical physics at Duke. The preliminary findings have already led Siemens to pursue a product prototype that will combine traditional ultrasound with ARFI, he added.

Typically, primary liver cancers are soft while those that have metastasized from other organs are hard. ARFI may be able to tell the difference between hard and soft tumors, according to Dr. Trahey. "If borne out in further studies, [that discriminating ability] suggests that ARFI may be useful in guiding treatment decisions. All current imaging methods--including CT [computed tomography], MRI [magnetic resonance imaging], and ultrasound--have mediocre performance in the detection of early liver cancers,” Dr. Trahey added. "There is a potential role for ARFI because it is low cost and can be built on conventional ultrasound machines.”

Traditional ultrasound is now the guidance method of choice in many hospitals for procedures targeting the liver, kidneys, pancreas, and lymph nodes, according to Dr. Trahey. Ultrasound has advantages in that it is widely available, low cost, and does not expose patients to ionizing radiation. However, a considerable number of tumors are difficult to see with this technique, requiring physicians to resort to alternatives such as CT and MRI, which add to the complexity and cost.

In the new study, the researchers captured ARFI images of 12 tumors in nine patients, including seven liver and two kidney tumors, and compared them to conventional ultrasound. The ARFI images showed greater contrast than standard ultrasound, providing clearer definition of the edges of cancerous masses.


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91 (87.976455688477): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (998.02017211914): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (57.93571472168): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (53.167343139648): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (45.061111450195): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (844.00177001953): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (64.13459777832): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (56.982040405273): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (44.822692871094): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (119.92454528809): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (745.05805969238): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (!!!!! 2784.0137481689): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (113.01040649414): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (!!!!! 4444.8375701904): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
105 (!!!!! 1044.0349578857): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
106 (376.93977355957): 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=269330000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (681.16188049316): 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=269330000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (!!!!! 3091.0968780518): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
109 (!!!!! 2994.0605163574): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
110 (!!!!! 5429.9831390381): 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=269330000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (892.87757873535): 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=269330000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (824.92828369141): 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 (476.83715820312): 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 (108.00361633301): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
115 (66.041946411133): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
116 (77.009201049805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
117 (57.93571472168): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
118 (72.956085205078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
119 (58.889389038086): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
120 (68.902969360352): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
121 (53.167343139648): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
122 (607.01370239258): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 69911.003112793): 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 (740.05126953125): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=269330000 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=269330000 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 15311.95640564): ( 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 (61.03515625): ( 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 (41.961669921875): 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 (39.100646972656): 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 (43.869018554688): 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 (30.994415283203): 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 (355.00526428223): 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 (36.954879760742): 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 (35.04753112793): 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 (30.994415283203): 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 (!!!!! 3175.0202178955): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (724.07722473145): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (!!!!! 2925.8728027344): SELECT name FROM jos_deeppockets WHERE id=214
138 (214.0998840332): SELECT name FROM jos_deeppockets WHERE id=214
139 (673.05564880371): 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 '((;)|(^))214((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (832.08084106445): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))214((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (63.180923461914): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
142 (147.10426330566): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
143 (!!!!! 11873.960494995): TRUNCATE TABLE jos_trademed_module
144 (!!!!! 8305.0727844238): 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=269330000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (324.96452331543): 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=269330000 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (!!!!! 2475.0232696533): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (76.055526733398): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (471.83036804199): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
149 (67.949295043945): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
150 (!!!!! 1696.8250274658): 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 (195.98007202148): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
152 (49.114227294922): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
153 (!!!!! 1217.8421020508): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=269330000 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=269330000 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (51.975250244141): 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=214 or channel_id is null)
155 (124.93133544922): 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=214 or channel_id is null)
156 (462.05520629883): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (!!!!! 3052.9499053955): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
158 (380.9928894043): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=269330000 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=269330000 AND published='1' LIMIT 1
159 (37.193298339844): select jos_twitters.link from jos_twitters where cat=10
160 (27.894973754883): select jos_facebook.link from jos_facebook where cat=10
161 (29.087066650391): select jos_google_plus.link from jos_google_plus where cat=10
162 (26.941299438477): select jos_linkedin.link from jos_linkedin where cat=10