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Cherenkov Effect Breakthrough Allows Clinicians to Visualize Radiotherapy in Body

By MedImaging International staff writers
Posted on 05 Feb 2014
Image: Long exposure image of Cherenkov emission and induced fluorescence from fluorescein dissolving in water during irradiation from a therapeutic LINAC (linear particle accelerator) beam (Photo courtesy of Dartmouth engineering PhD candidate Adam Glaser).
Image: Long exposure image of Cherenkov emission and induced fluorescence from fluorescein dissolving in water during irradiation from a therapeutic LINAC (linear particle accelerator) beam (Photo courtesy of Dartmouth engineering PhD candidate Adam Glaser).
Image: A radiation beam treatment is visualized here in the first in human use of the technique. The blue represents the treatment area. As the dose fades, the treatment area becomes a dark gray shadow (Photo courtesy of Dartmouth University).
Image: A radiation beam treatment is visualized here in the first in human use of the technique. The blue represents the treatment area. As the dose fades, the treatment area becomes a dark gray shadow (Photo courtesy of Dartmouth University).
A scientific breakthrough may provide radiation oncologists with new tools to increase the accuracy and safety of radiation treatment in cancer patients by helping them visualize the powerful beams of a linear accelerator as they enter or exit the body.

Dartmouth University (Hanover, NH, USA) began to study a scientific phenomenon called the Cherenkov Effect in 2011. The scientists and engineers hypothesized that by using Cherenkov emissions the beam of radiation could be “visible” to the treatment team. The capability to seize a beam of radiation would show: how the radiation signals move through the body, the dose of radiation to the skin, and any errors in dosage.

Scientists, for the first time in humans, have used the technology, and the first case was a female breast cancer patient undergoing radiation. “Breast cancer is suited for this because the imaging visualizes the superficial dose of radiation to the skin,” said Lesley A. Jarvis, MD, radiation oncologist, Norris Cotton Cancer Center. Similar to sunburn, skin reactions are a typical and annoying side effect during breast radiation. “By imaging and quantitating the surface dose in a way that has never been done before,” said Dr. Jarvis, “we hope to learn more about the physical factors contributing to this skin reaction.”

By seeing the effect of radiation on the body, Dartmouth’s Norris Cotton Cancer Center radiation oncologists and physicists can make adjustments to avoid side effects to the skin. Most radiation patients undergo somewhere between 8–20 sessions. The Cherenkov images of the breast cancer patient showed a hot spot in her underarm, which physicians and physicists could work to prevent in future sessions. “The actual images show that we are treating the exact correct location, with the appropriate beam modifications and with the precise dose of radiation,” stated Dr. Jarvis.

This trial revealed that the Cherenkov Effect is feasible for use real-time during radiation. “We have learned the imaging is easy to incorporate into the patient's treatment, adding only minimal time to the treatments,” said Dr. Jarvis.

This was the first time Cherenkov studies came out of the laboratory and into a treatment setting. The scientists coined the approach Cherenkoscopy. As they anticipated, during the session they were able to see comprehensive data about the treatment field and the dose. The findings were published in the November 2013 issue of the Journal of Biomedical Optics. “This first observation in the dog proved that we could image a radiation beam during treatment in real time,” said David Gladstone, ScD, chief of clinical physics at Norris Cotton Cancer Center. “The images verified the shape of the beam as well as intended motion of the treatment machine. The time needed to acquire this information is negligible, even with our experimental, nonintegrated system.”

By incorporating Cherenkov imaging technology into routine clinical care, Dr. Gladstone reported that the technology could be used to prove that the correct dose is being delivered to patients, helping to avoid misadministration of radiation therapy, a rare, but dangerous occurrence. “The time needed to acquire this information is negligible, even with our experimental, nonintegrated system,” said Dr. Gladstone. “Cherenkov images were found to contain much richer information than anticipated, specifically, we did not expect to visualize internal blood vessels.”

Twelve patients are participating in a pilot study, which is almost complete. The researchers now plan to publish their findings.

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89 (66.995620727539): 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 (67.949295043945): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (33.855438232422): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (31.948089599609): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (30.994415283203): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (45.7763671875): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (60.796737670898): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (48.87580871582): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (83.92333984375): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (72.002410888672): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (38.14697265625): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (78.201293945312): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (668.04885864258): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
105 (102.04315185547): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
106 (75.101852416992): 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=294750567 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (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=294750567 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (357.86628723145): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
109 (106.8115234375): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
110 (182.15179443359): 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=294750567 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (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=294750567 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (!!!!! 2502.9182434082): 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 (!!!!! 7310.8673095703): 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 (!!!!! 7807.9700469971): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
115 (!!!!! 7974.1477966309): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
116 (!!!!! 7817.9836273193): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
117 (!!!!! 7943.868637085): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
118 (!!!!! 7750.9880065918): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
119 (!!!!! 8018.970489502): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
120 (!!!!! 2291.9178009033): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
121 (!!!!! 111685.99128723): 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 (!!!!! 10796.070098877): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
123 (!!!!! 8780.9562683105): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
124 (!!!!! 7648.9448547363): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294750567 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294750567 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 1068707.9429626): ( 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 (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
127 (40.054321289062): 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 (30.040740966797): 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 (42.200088500977): 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 (29.087066650391): 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 (29.087066650391): 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 (26.941299438477): 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 (371.93298339844): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
134 (345.94535827637): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
135 (38.862228393555): SELECT name FROM jos_deeppockets WHERE id=213
136 (27.179718017578): SELECT name FROM jos_deeppockets WHERE id=213
137 (426.05400085449): 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 '((;)|(^))213((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
138 (410.07995605469): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))213((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
139 (59.843063354492): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
140 (39.100646972656): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
141 (!!!!! 5074.9778747559): TRUNCATE TABLE jos_trademed_module
142 (347.85270690918): 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=294750567 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
143 (546.93222045898): 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=294750567 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
144 (406.02684020996): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
145 (46.968460083008): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
146 (52.928924560547): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
147 (38.14697265625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
148 (!!!!! 1649.1413116455): 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 (124.93133544922): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
150 (97.036361694336): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
151 (504.0168762207): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294750567 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294750567 AND type='deeppockets_item' AND published='1' LIMIT 1
152 (34.809112548828): 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=213 or channel_id is null)
153 (30.994415283203): 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=213 or channel_id is null)
154 (40.054321289062): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
155 (!!!!! 2836.9426727295): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
156 (52.928924560547): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294750567 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294750567 AND published='1' LIMIT 1
157 (85.830688476562): select jos_twitters.link from jos_twitters where cat=10
158 (51.021575927734): select jos_facebook.link from jos_facebook where cat=10
159 (46.014785766602): select jos_google_plus.link from jos_google_plus where cat=10
160 (43.869018554688): select jos_linkedin.link from jos_linkedin where cat=10
161 (280.85708618164): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
162 (!!!!! 2084.0167999268): insert into jos_banners_delta values (14615,'2025-06-19 13:21:27','216.73.216.120','view'),(14202,'2025-06-19 13:21:27','216.73.216.120','view'),(14203,'2025-06-19 13:21:27','216.73.216.120','view')