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AI Model for PET Imaging Determines Patient Response to Brain Tumor Treatments

By MedImaging International staff writers
Posted on 21 Aug 2023

The assessment of changes in metabolic tumor volume (MTV) through PET scans using specific radiotracers like F-18 fluoroethyl tyrosine (FET) plays a vital role in evaluating the treatment response in patients with brain tumors. Conventionally, MTV is determined through manual or semiautomatic processes, which are not only time-consuming but may also vary depending on the clinician performing the task. Now, a new AI model for PET imaging could greatly assist clinicians in evaluating how patients are responding to brain tumor treatments.

Researchers at Aachen University Hospital (Aachen, Germany) demonstrated that a deep learning-based AI model can automate the segmentation of MTV on brain PET images, potentially eliminating the need for human clinicians to preprocess these images. The goal of their study was to create a method for automated MTV segmentation and assess its effectiveness in gauging treatment responses in glioma patients. The research included a collection of 699 F-18 FET-PET scans from 555 brain tumor patients, either obtained at the time of initial diagnosis or during subsequent follow-up visits. Experienced nuclear-medicine physicians first segmented the MTV in these images, encompassing lesions with varying levels of F-18 FET radiotracer uptake.

The team then utilized 476 of these images to train an AI neural network, named "no new U-Net," to perform MTV segmentation. To evaluate the model's accuracy, they applied it to an imaging dataset consisting of 223 scans from 156 different patients. Out of 205 lesions showing increased F-18 FET uptake in this dataset, the model correctly identified 189. Interestingly, the model did not mistakenly identify any anatomic regions with normal increased uptake of F-18 FET radiotracer, such as in the superior sagittal sinus, as tumors. The model's performance was quite remarkable, achieving a mean F1 score of 92%, a sensitivity of 93%, and a positive predictive value of 95% in detecting lesions. A key advantage of this model is its ability to fully automate 3D segmentation using just a single F-18 FET-PET scan. Moreover, it can perform this task in under two minutes using a standard graphics processing unit, without the need for any preprocessing.

"The main finding of our study is that our deep learning-based neural network allows reliable and fully automated detection and 3D segmentation of brain tumors investigated by F-18 FET PET," noted the researchers. "This finding highlights the value of the network for improvement and automatization of clinical decision-making based on the volumetric evaluation of amino acid PET."

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93 (32.901763916016): 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`
94 (55.789947509766): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (30.994415283203): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (34.093856811523): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (74.863433837891): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (32.186508178711): SELECT show_live FROM jos_com_show_setting LIMIT 1
105 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
106 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
107 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
108 (72.002410888672): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
109 (41.961669921875): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
110 (49.829483032227): 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=294798320 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (44.822692871094): 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=294798320 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (62.942504882812): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
113 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
114 (47.922134399414): 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=294798320 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
115 (528.09715270996): 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=294798320 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
116 (714.06364440918): 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
117 (402.92739868164): 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
118 (78.916549682617): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
119 (89.168548583984): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
120 (46.968460083008): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
121 (37.908554077148): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
122 (39.100646972656): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
123 (38.14697265625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
124 (319.00405883789): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
125 (!!!!! 23744.106292725): 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 (108.00361633301): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
127 (51.975250244141): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
128 (456.80999755859): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294798320 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294798320 AND type='deeppockets_item' AND published='1' LIMIT 1
129 (!!!!! 402864.21775818): ( 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
130 (159.02519226074): ( 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
131 (37.908554077148): 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
132 (56.982040405273): 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
133 (38.862228393555): 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
134 (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
135 (27.179718017578): 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
136 (27.179718017578): 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
137 (520.94459533691): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
138 (334.9781036377): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
139 (36.001205444336): SELECT name FROM jos_deeppockets WHERE id=213
140 (30.994415283203): SELECT name FROM jos_deeppockets WHERE id=213
141 (428.91502380371): 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((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
142 (338.07754516602): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))213((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
143 (59.127807617188): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
144 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
145 (!!!!! 8309.1259002686): TRUNCATE TABLE jos_trademed_module
146 (77.962875366211): 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=294798320 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
147 (55.074691772461): 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=294798320 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
148 (784.87396240234): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
149 (74.863433837891): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
150 (52.928924560547): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
151 (41.007995605469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
152 (!!!!! 1049.9954223633): 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 (53.882598876953): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
154 (39.100646972656): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
155 (31.948089599609): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294798320 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294798320 AND type='deeppockets_item' AND published='1' LIMIT 1
156 (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=213 or channel_id is null)
157 (!!!!! 1932.8594207764): 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)
158 (47.206878662109): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
159 (86.069107055664): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
160 (53.882598876953): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294798320 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294798320 AND published='1' LIMIT 1
161 (36.954879760742): select jos_twitters.link from jos_twitters where cat=10
162 (33.140182495117): select jos_facebook.link from jos_facebook where cat=10
163 (30.994415283203): select jos_google_plus.link from jos_google_plus where cat=10
164 (32.186508178711): select jos_linkedin.link from jos_linkedin where cat=10
165 (290.1554107666): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
166 (!!!!! 2671.0033416748): insert into jos_banners_delta values (14615,'2025-04-29 22:57:29','3.147.140.23','view'),(14202,'2025-04-29 22:57:29','3.147.140.23','view'),(14203,'2025-04-29 22:57:29','3.147.140.23','view')