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Compact Gamma Camera Developed for Prostate Cancer Imaging

By MedImaging International staff writers
Posted on 11 Aug 2009
A U.S. defense laboratory and a Canadian company are developing a compact gamma camera for high-resolution imaging of prostate cancer. The camera system is a nuclear medical device that can localize cancer tissue in the prostate gland in detail at an early stage, which is important for the successful diagnosis and early treatment of the potentially lethal disease.

The common way to diagnose prostate cancer--the second leading cancer among men, next to lung cancer--is through a blood test that measures the levels of a protein produced by the prostate gland called prostate-specific antigen (PSA). Elevated PSA levels may indicate prostate cancer, but with a high number of false-positive detections. Frequently, then, men must have an invasive biopsy, usually guided by ultrasound imagery. Other methods for confirming a diagnosis of prostate cancer include traditional nuclear medical imaging techniques, such as positron emission spectroscopy and single photon emission computed tomography.

However, current imaging methods have limitations. Benign and cancerous tumors cannot easily be differentiated by ultrasound, and fibrous tissues can be mistakenly identified as tumors if patients have previously had radiation treatment of the prostate. Conventional nuclear imaging systems produce lower-resolution images, and are less efficient than the U.S. Department of Energy's Brookhaven National Laboratory's (Upton, NY, USA) compact digital camera. Moreover, the detectors in current systems are too large to be used in transrectal probes.

In contrast, the new cadmium zinc telluride (CZT)-based gamma camera is small enough for transrectal prostate-cancer diagnosis, after the patient is injected with a tracer radiopharmaceutical. The high-resolution CZT detector is the cutting-edge technology that drives the system. Using this new technology, the working distance between the imaging system and the prostate gland is minimized, allowing urologists to capture better images with a smaller amount of injected radioactive tracer, compared to conventional nuclear medical systems.

"This project has been a great opportunity to take gamma-ray detector technology originally developed for national security and apply it toward important societal goals in the area of cancer diagnosis and treatment,” said Dr. Ralph James, a senior physicist at Brookhaven who is the Laboratory's lead coinventor of the technology together with Brookhaven associate scientist Dr. Yonggang Cui.

Dr. Cui added, "The CZT material combines the best aspects of conventional nuclear imaging detectors while minimizing their weaknesses. Our experience in detector development and electronics design has been critical in delivering this high performance system in a very compact package at a competitive cost.”

Although the CZT-based system was designed to reveal prostate cancer, it can be modified for imaging other cancers, such as cervical, uterine, colorectal, and breast cancers. It can also be optimized for surgical use as a probe to guide the removal of cancerous tumors while minimizing damage to surrounding healthy tissues.

CZT detectors have advanced the development of new instruments for measuring radiation. Numerous medical, industrial, scientific, environmental, and homeland-security applications exist for this technology, including handheld instruments to reduce the trafficking of nuclear materials and portable field instruments for environmental monitoring and remediation.

The U.S. Department of Energy's (DOE) Office of Nonproliferation Research and Development has been the principal sponsor funding the development of CZT detectors, and Hybridyne Imaging Technologies (Toronto, ON, Canada) funded the design and engineering of the new compact gamma camera. The inventors have 16 patents on the technology, ranging from detector design and fabrication to imaging. Brookhaven Science Associates, the company that manages Brookhaven Lab, has a patent pending on the advanced CZT detectors.

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89 (48.87580871582): 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 (!!!!! 7943.868637085): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (!!!!! 4788.875579834): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (!!!!! 6334.0663909912): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (!!!!! 8213.996887207): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (!!!!! 7972.9557037354): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (!!!!! 7763.147354126): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (!!!!! 5125.0457763672): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (407.93418884277): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (!!!!! 1078.8440704346): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (252.96211242676): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (!!!!! 1344.9192047119): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (207.90100097656): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (233.88862609863): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (43.869018554688): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (!!!!! 6079.1969299316): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
105 (360.96572875977): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
106 (72.956085205078): 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=294724957 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (!!!!! 1733.0646514893): 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=294724957 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (905.03692626953): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
109 (!!!!! 1569.9863433838): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
110 (!!!!! 7844.9249267578): 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=294724957 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (!!!!! 8010.1490020752): 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=294724957 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (!!!!! 2127.8858184814): 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 (!!!!! 7584.0950012207): 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 (610.8283996582): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
115 (607.01370239258): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
116 (494.00329589844): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
117 (405.07316589355): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
118 (521.18301391602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
119 (670.19462585449): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
120 (627.99453735352): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
121 (778.1982421875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
122 (895.97702026367): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 114583.96911621): 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 (!!!!! 1837.0151519775): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294724957 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294724957 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 20148.038864136): ( 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 (!!!!! 16002.893447876): ( 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 (!!!!! 7668.0183410645): 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 (!!!!! 8198.0228424072): 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 (!!!!! 7688.9991760254): 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 (!!!!! 11971.950531006): 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 (!!!!! 11660.099029541): 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 (!!!!! 8463.1443023682): 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 (!!!!! 7513.9999389648): 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 (!!!!! 6690.0253295898): 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 (!!!!! 1155.8532714844): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (796.07963562012): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (299.93057250977): SELECT name FROM jos_deeppockets WHERE id=213
138 (199.0795135498): SELECT name FROM jos_deeppockets WHERE id=213
139 (826.83563232422): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (816.10679626465): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))213((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (!!!!! 1682.9967498779): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
142 (349.99847412109): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
143 (!!!!! 16937.017440796): TRUNCATE TABLE jos_trademed_module
144 (116.82510375977): 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=294724957 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (777.9598236084): 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=294724957 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (!!!!! 2402.0671844482): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (!!!!! 1789.8082733154): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (822.06726074219): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
149 (92.983245849609): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
150 (!!!!! 4643.9170837402): 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 (319.00405883789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
152 (!!!!! 1604.7954559326): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
153 (!!!!! 1057.8632354736): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294724957 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294724957 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (324.01084899902): 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)
155 (!!!!! 1312.0174407959): 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)
156 (!!!!! 4783.8687896729): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (!!!!! 2391.8151855469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
158 (!!!!! 6048.9177703857): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294724957 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294724957 AND published='1' LIMIT 1
159 (306.12945556641): select jos_twitters.link from jos_twitters where cat=10
160 (47.922134399414): select jos_facebook.link from jos_facebook where cat=10
161 (44.107437133789): select jos_google_plus.link from jos_google_plus where cat=10
162 (39.100646972656): select jos_linkedin.link from jos_linkedin where cat=10