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X-Ray Imaging Offers New Clues on Bone Damage

By MedImaging International staff writers
Posted on 25 Mar 2013
Bone fractures, from athletes to individuals suffering from osteoporosis, are typically the result of tiny cracks accumulating over time—invisible runnels of damage that, when coalesced, lead to that break. More...
Using innovative X-ray techniques, researchers have revealed cellular-level detail of what occurs over time when bone bears repetitive stress, visualizing damage at smaller scales than ever seen. Their research could offer insights into how bone fractures could be averted.

Dr. Marjolein van der Meulen, professor of biomedical engineering at Cornell University (Ithaca, NY, USA), led the study, which was published online March 5, 2013, in the journal PLOS One, using transmission X-ray microscopy at the Stanford Synchrotron Radiation Lightsource, part of the SLAC US National Accelerator Laboratory (Menlo Park, CA, USA).

Using the high-energy hard X-rays at SLAC’s synchrotron, the researchers generated images of damage in sheep bone at a resolution of 30 nm—several times better than standard imaging via X-ray micro-computed tomography (micro-CT), which is optimally 2–4 micrometers in resolution.

“In skeletal research, people have been trying to understand the role of damage,” said Dr. van der Meulen, whose research is called mechanobiology—how mechanics intersects with biologic processes. “One of the things people have hypothesized is that damage is one of the stimuli that cells are sensing.”

The inability of cells to repair microdamage over time ultimately adds to the failure and breaking of bone, according to Dr. van der Meulen. Until now, visualization methods of microdamage were limited to lower resolution images. More detailed bone characteristics, such as the small areas called lacunae, where cells dwell, and the microscopic rivers between them, called caniliculi, were not visible.

The imaging involved special preparation of sheep bone samples led by graduate student and first author Dr. Garry Brock. First they cut 2-mm2 matchstick-like samples. The matchsticks were “damaged” in the lab at various levels: Some received 20,000 cycles of “loading” in bending; others received a single dose of loading; and others were notched before loading. All samples were treated with a lead-uranyl acetate X-ray-negative stain that seeps into porosity caused by damage in the bone tissue. Then sections from the loaded segment were polished to 50-micrometer thicknesses.

A greater percentage of stain was seen in sections subjected to repetitive stress. Instead of seeing new surfaces formed by damage (cracks) as was expected, the researchers observed damage in the cellular structures. The X-rays picked up the dye within existing, intact structures, like the lacunae where the cells sit, and in the caniliculi. “The tissue is not breaking, but rather, there is staining within the cells,” Dr. Brock said.

Dr. van der Meulen added, “We were surprised by how cell-based the staining was, as opposed to forming lots of new surfaces in the material.”

In osteoporotic individuals, including many postmenopausal women, fractures usually occur in the forearm, spine, and hip. The investigators are trying to determine why these fractures occur by studying nano- and microscale changes in bone tissue. They are also examining the possibility of evaluating whether a class of osteoporosis drugs called bisphosphonates, which decrease the overall rate of hip fractures but can lead to “atypical femoral fractures,” affect nanoscale damage processes. These unusual fractures occur at sites that typically do not fracture with osteoporosis such as in the middle of the bone shaft. The new damage visualization technology could lend new insights in future studies, according to the investigators.

Related Links:
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82 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
83 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
84 (38.14697265625): SELECT show_live FROM jos_com_show_setting LIMIT 1
85 (42.915344238281): SELECT show_live FROM jos_com_show_setting LIMIT 1
86 (38.14697265625): SELECT show_live FROM jos_com_show_setting LIMIT 1
87 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
88 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
89 (56.982040405273): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294745355 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
90 (31.948089599609): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294745355 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
91 (33.855438232422): 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`
92 (71.048736572266): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (42.915344238281): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (38.14697265625): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (37.908554077148): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (37.193298339844): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (39.100646972656): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (37.193298339844): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
105 (32.901763916016): SELECT show_live FROM jos_com_show_setting LIMIT 1
106 (92.983245849609): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
107 (93.936920166016): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
108 (51.021575927734): 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=294745355 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
109 (57.93571472168): 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=294745355 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
110 (70.095062255859): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
111 (44.107437133789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
112 (46.014785766602): 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=294745355 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
113 (590.80123901367): 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=294745355 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
114 (565.0520324707): 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
115 (324.01084899902): 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
116 (102.04315185547): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
117 (51.975250244141): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
118 (55.074691772461): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
119 (39.815902709961): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
120 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
121 (37.908554077148): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
122 (42.200088500977): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
123 (35.04753112793): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
124 (277.99606323242): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
125 (!!!!! 21967.887878418): 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
126 (567.91305541992): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294745355 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294745355 AND type='deeppockets_item' AND published='1' LIMIT 1
127 (!!!!! 7361.1736297607): ( 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
128 (77.962875366211): ( 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
129 (37.908554077148): 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
130 (30.040740966797): 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
131 (49.829483032227): 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
132 (31.948089599609): 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
133 (324.96452331543): 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
134 (38.14697265625): 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
135 (34.093856811523): 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
136 (27.894973754883): 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
137 (504.0168762207): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
138 (353.81317138672): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
139 (40.054321289062): SELECT name FROM jos_deeppockets WHERE id=211
140 (29.087066650391): SELECT name FROM jos_deeppockets WHERE id=211
141 (572.20458984375): 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 '((;)|(^))211((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
142 (437.97492980957): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))211((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
143 (68.902969360352): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
144 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
145 (!!!!! 8846.0445404053): TRUNCATE TABLE jos_trademed_module
146 (87.976455688477): 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=294745355 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
147 (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=294745355 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
148 (376.93977355957): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
149 (58.889389038086): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
150 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
151 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
152 (!!!!! 1228.0941009521): 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
153 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
154 (44.107437133789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
155 (51.021575927734): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294745355 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294745355 AND type='deeppockets_item' AND published='1' LIMIT 1
156 (36.001205444336): 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=211 or channel_id is null)
157 (32.901763916016): 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=211 or channel_id is null)
158 (35.04753112793): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
159 (77.962875366211): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
160 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294745355 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294745355 AND published='1' LIMIT 1
161 (35.04753112793): select jos_twitters.link from jos_twitters where cat=10
162 (31.948089599609): select jos_facebook.link from jos_facebook where cat=10
163 (41.007995605469): select jos_google_plus.link from jos_google_plus where cat=10
164 (33.140182495117): select jos_linkedin.link from jos_linkedin where cat=10
165 (287.05596923828): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
166 (!!!!! 1166.1052703857): insert into jos_banners_delta values (14615,'2025-08-19 10:36:51','216.73.216.0','view'),(14202,'2025-08-19 10:36:51','216.73.216.0','view'),(14203,'2025-08-19 10:36:51','216.73.216.0','view')