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Dark-Field Chest Imaging Helps Diagnose Lung Disease

By MedImaging International staff writers
Posted on 06 Sep 2021
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Image: Schematic of the prototype dark-field X-ray system (Photo courtesy of Radiology)
Image: Schematic of the prototype dark-field X-ray system (Photo courtesy of Radiology)
A new chest x-ray imaging technique can detect signals in the lungs that are undetected in standard chest x-rays, claims a new study.

Under investigation by researchers at Munich Technical University (TUM; Germany), Klinikum rechts der Isar (Munich, Germany), and Philips Research (Hamburg, Germany), x-ray dark-field imaging, unlike attenuation-based conventional radiography, utilizes the wave properties of x-rays, specifically the ultra-small-angle scattering that occurs at the material interface within the specimen. In analogy to dark-field light microscopy, dark field in this context refers to the bright appearance of scattering objects on a dark background.

Since the contrast is generated by multiple refractions on microstructures, healthy lungs have a relatively high signal due to their many air-tissue interfaces in the alveoli. Lung diseases interfering with the integrity of the alveolar structure, such as emphysema, fibrosis, and lung cancer, lead to a decrease in the dark-field signal. The researchers have developed a prototype system for humans that can be used to evaluate dark-field imaging for detection and characterization of lung diseases, with a comparably low amount of radiation exposure for the subject.

For the study, the researchers enlisted 40 healthy patients who underwent chest CT as part of their diagnostic workup, as well attenuation-based and dark-field chest radiographs simultaneously. The researchers found a correlation between total dark-field signal and the lung volume, with normal human lungs on dark-field chest x-ray imaging produced high signal, while the surrounding osseous structures had a low signal, and soft tissue produced no signal at all. In addition, no differences were found between men and women and age, weight, and height did not influence the dark-field signal. The study was published on August 24, 2021, in Radiology.

“Because of the nature of signal generation in dark-field imaging, bone structures and soft tissue generate only a minimal dark-field signal compared with lung tissue. This feature allows for a detailed depiction of lung tissue without impairment by surrounding structures,” concluded lead author Florian Gassert, PhD, of TUM, and colleagues. “These findings prove that the dark-field signal is indeed sensitive to the subject's lung condition alone and is independent from demographic factors, highlighting its potential value for diagnosis and monitoring of respiratory diseases.”

Related Links:
Munich Technical University
Klinikum rechts der Isar
Philips Research


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94 (49.114227294922): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (40.054321289062): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (42.915344238281): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (40.054321289062): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (66.995620727539): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (43.153762817383): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (66.041946411133): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (41.961669921875): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (58.889389038086): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (41.007995605469): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (103.95050048828): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
105 (65.088272094727): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
106 (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=294789539 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (73.909759521484): 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=294789539 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (109.91096496582): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
109 (73.19450378418): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
110 (56.982040405273): 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=294789539 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (684.97657775879): 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=294789539 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (776.05247497559): 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 (554.08477783203): 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 (168.80035400391): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
115 (87.976455688477): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
116 (113.01040649414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
117 (64.849853515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
118 (87.976455688477): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
119 (123.02398681641): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
120 (380.03921508789): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
121 (!!!!! 26010.036468506): 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
122 (164.03198242188): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
123 (90.122222900391): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
124 (589.84756469727): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294789539 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294789539 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 460023.88000488): ( 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 (79.154968261719): ( 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 = 294800513 LIMIT 1
128 (29.087066650391): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800513 LIMIT 1
129 (43.153762817383): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800359 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 = 294800359 LIMIT 1
131 (27.894973754883): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800361 LIMIT 1
132 (27.894973754883): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294800361 LIMIT 1
133 (514.03045654297): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
134 (392.91381835938): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
135 (45.061111450195): SELECT name FROM jos_deeppockets WHERE id=211
136 (29.087066650391): SELECT name FROM jos_deeppockets WHERE id=211
137 (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 '((;)|(^))211((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
138 (384.09233093262): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))211((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
139 (82.969665527344): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
140 (54.121017456055): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
141 (!!!!! 9530.0674438477): TRUNCATE TABLE jos_trademed_module
142 (91.791152954102): 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=294789539 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
143 (51.975250244141): 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=294789539 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
144 (852.82325744629): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
145 (55.074691772461): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
146 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
147 (39.100646972656): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
148 (!!!!! 1257.8964233398): 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
149 (58.174133300781): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
150 (39.815902709961): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
151 (39.815902709961): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294789539 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294789539 AND type='deeppockets_item' AND published='1' LIMIT 1
152 (30.040740966797): 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)
153 (27.894973754883): 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)
154 (27.179718017578): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
155 (59.843063354492): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
156 (40.054321289062): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294789539 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294789539 AND published='1' LIMIT 1
157 (36.001205444336): select jos_twitters.link from jos_twitters where cat=10
158 (30.994415283203): select jos_facebook.link from jos_facebook where cat=10
159 (32.901763916016): select jos_google_plus.link from jos_google_plus where cat=10
160 (34.093856811523): select jos_linkedin.link from jos_linkedin where cat=10
161 (275.1350402832): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
162 (!!!!! 1044.0349578857): insert into jos_banners_delta values (14615,'2025-05-01 12:02:17','18.224.44.53','view'),(14202,'2025-05-01 12:02:17','18.224.44.53','view'),(14203,'2025-05-01 12:02:17','18.224.44.53','view')