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Ultrasound Acoustic Diffusion Detects Bone Density

By MedImaging International staff writers
Posted on 03 Oct 2019
A novel ultrasound technique can provide a non-invasive way of evaluating osteoporosis risk by assessing microscale bone structure.

Researchers at North Carolina State University (NC State; Raleigh, USA) and Charité University Medicine (Charité; Berlin, Germany) conducted a numerical computational study to investigate the effect of cortical bone pore size and density on the acoustic diffusion constant of ultrasound multiple scattering. To do so, finite-difference time-domain simulations were conducted in cortical microstructures derived human proximal femur cross-sections, and modified by controlling the density and size of the pores. To do so, Gaussian pulses were transmitted, and the signals were recorded to obtain the backscattered intensity.

The incoherent contribution of the backscattered intensity was then extracted to give access to the diffusion constant. The researchers found that at 8 MHz, significant differences were observed in media with different porous micro-architectures, with the diffusion constant monotonously influenced by either pore diameter or pore density. An increase in pore size and pore density resulted in a decrease in the diffusion constant, suggesting the potential of the proposed technique for the characterization of cortical microarchitecture. The study was published on August 8, 2019, in The Journal of the Acoustical Society of America.

“We are at least years from clinical applications, but if the results hold up, we may have a way to monitor patients on a regular basis to determine the health of the bone,” said corresponding author Marie Muller, PhD, of the department of mechanical and aerospace engineering at NC State. “That means people can track their potential risk for osteoporosis without having to worry about the radiation exposure associated with X-rays. In addition, the technique could help researchers and health care providers determine the effect of osteoporosis treatment efforts.”

“One thing that's exciting about these techniques is that we've taken one of ultrasound's shortcomings and turned it to our advantage,” concluded Dr. Muller. “The shortcoming is the fact that ultrasound cannot give us clear images when used in complex media, such as bone. That's because the ultrasound waves bounce all over the place in these complex environments, making it impossible to calculate how far they've traveled.”

Long bones consist of a trabecular core and an outer compact cortical bone shell. The latter is highly dense, but is pervaded by elongated pores, which results in a porosity ranging between 3% and 28%. It has been previously shown that bone elastic modulus, toughness, and impact energy absorption capacity decrease as cortical porosity increases.

Related Links:
North Carolina State University
Charité University Medicine

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91 (782.01293945312): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (845.19386291504): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (65.088272094727): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (55.074691772461): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (46.014785766602): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (471.11511230469): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (51.975250244141): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (41.007995605469): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (138.0443572998): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (261.06834411621): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (263.92936706543): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (46.968460083008): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (217.19932556152): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (!!!!! 2882.9574584961): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
105 (720.97778320312): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
106 (132.08389282227): 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=294779555 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (!!!!! 1013.0405426025): 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=294779555 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (656.1279296875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
109 (!!!!! 1276.969909668): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
110 (!!!!! 4075.0503540039): 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=294779555 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (891.92390441895): 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=294779555 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (!!!!! 1416.9216156006): 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 (783.92028808594): 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 (!!!!! 2964.973449707): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
115 (679.96978759766): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
116 (!!!!! 1447.9160308838): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
117 (104.18891906738): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
118 (!!!!! 1513.9579772949): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
119 (659.94262695312): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
120 (859.02214050293): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
121 (705.95741271973): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
122 (613.92784118652): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 73993.921279907): 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 (658.98895263672): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294779555 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294779555 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 23524.99961853): ( 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 (!!!!! 2822.8759765625): ( 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 (259.1609954834): 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 (!!!!! 2803.8024902344): 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 (553.13110351562): 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 (62.227249145508): 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 (656.1279296875): 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 (63.896179199219): 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 (319.9577331543): 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 (50.067901611328): 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 (!!!!! 1503.9443969727): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (!!!!! 1088.1423950195): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (646.82960510254): SELECT name FROM jos_deeppockets WHERE id=214
138 (64.849853515625): SELECT name FROM jos_deeppockets WHERE id=214
139 (!!!!! 1003.0269622803): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (!!!!! 1046.895980835): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))214((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (!!!!! 1488.208770752): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
142 (323.05717468262): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
143 (!!!!! 77388.048171997): TRUNCATE TABLE jos_trademed_module
144 (!!!!! 10914.087295532): 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=294779555 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (!!!!! 15612.840652466): 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=294779555 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (!!!!! 5696.0582733154): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (!!!!! 2661.9434356689): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (!!!!! 7615.0894165039): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
149 (!!!!! 7990.1218414307): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
150 (!!!!! 7071.0182189941): 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 (!!!!! 8238.0771636963): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
152 (!!!!! 7158.0410003662): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
153 (!!!!! 5815.0291442871): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294779555 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294779555 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (!!!!! 13431.072235107): 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 (!!!!! 4389.0476226807): 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 (!!!!! 6921.0529327393): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (!!!!! 2294.0635681152): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
158 (!!!!! 8435.0109100342): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294779555 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294779555 AND published='1' LIMIT 1
159 (!!!!! 3655.9104919434): select jos_twitters.link from jos_twitters where cat=10
160 (64.13459777832): select jos_facebook.link from jos_facebook where cat=10
161 (46.968460083008): select jos_google_plus.link from jos_google_plus where cat=10
162 (249.86267089844): select jos_linkedin.link from jos_linkedin where cat=10