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AR System Enables Free-Hand, Real-Time Needle Guidance for Prostate Cancer Diagnosis

By MedImaging International staff writers
Posted on 06 Mar 2023
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Image: The HoloLens AR system superimposes anatomical features generated from MRI or CT scans onto the patient (Photo courtesy of NIH)
Image: The HoloLens AR system superimposes anatomical features generated from MRI or CT scans onto the patient (Photo courtesy of NIH)

Prostate cancer is the second most common cause of cancer-related deaths among men, according to the US Centers for Disease Control and Prevention. Transperineal (TP) biopsy is one of the conventional methods used for diagnosing and treating prostate cancer by collecting tissue samples through a needle inserted through the perineum wall. TP biopsy typically involves a pre-operation MRI scan and a transrectal ultrasound, with the images combined and displayed on a monitor for the urologist to visualize. The urologist can perform the needle insertion process free-hand or through a grid-based method. However, 2D visualization of a 3D region can make the needle's guidance and visualization a challenging task.

To address this issue, researchers from the US National Institutes of Health (NIH, Bethesda, MD, USA) have proposed an approach based on an augmented reality (AR) system called HoloLens. In their recent paper published in the Journal of Medical Imaging, the researchers have detailed their successful HoloLens AR system that accurately and effectively projects MRI and ultrasound images onto patients, helping to guide a needle to the target. The HoloLens AR system employs a volumetric 3D scan, like an MRI scan, to create an accurate view of the patient. Leveraging reference data from the patient, the MRI scan can be superimposed precisely onto the patient. The superimposed image is fed into the HoloLens goggles worn by the urologist and enables viewing the patient as well as the MRI of the patient in proper alignment. The HoloLens goggles also enable the urologist to view the image at different angles by moving the head. HoloLens can also display the pre-planned needle path on the patient, the target tissue of the prostate, and the real-time needle position during the procedure.

To evaluate their AR system's image overlay accuracy and needle targeting precision, the researchers utilized a 3D-printed phantom. They used the free-hand as well as planned-path guidance methods to guide needles into a gel phantom, and subsequently recorded the needle placement errors. The system was also used to deliver soft tissue markers onto tumors of a human pelvis phantom. The researchers found similar placement errors associated with both free-hand and planned-path guidance methods. Moreover, all implanted soft tissue markers were inside or in close proximity to the tumors.

“The current methods have certain limitations to them,” said Dr. Ming Li from the NIH who led the research. “Robot-assisted guidance is costly and adds procedural time, while other methods require a certain path for the needle that leaves out the outer reaches of the prostate. These problems are solved using the HoloLens AR system, which provides the doctor with the ability to use a free-hand approach.”

“The HoloLens has the potential to provide more flexibility than the current grid-based TP methods and can do so accurately,” highlighted Li. “By providing a 3D immersive experience, the HoloLens AR system makes free-hand lesion targeting feasible. As needle procedures move from rectum to the perineum, AR systems could provide great clinical value to doctors and patients by solving the problems associated with prostate intervention procedures.”

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90 (26.941299438477): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294796418 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
91 (30.994415283203): 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 (52.928924560547): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (27.894973754883): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (27.179718017578): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (25.98762512207): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (51.021575927734): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (29.087066650391): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
105 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
106 (63.896179199219): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
107 (40.769577026367): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
108 (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 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=294796418 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
109 (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=294796418 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
110 (65.088272094727): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
111 (41.007995605469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
112 (335.9317779541): 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=294796418 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
113 (399.82795715332): 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=294796418 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
114 (53.882598876953): 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=294796413 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
115 (335.9317779541): 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=294796413 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
116 (607.96737670898): 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 (372.88665771484): 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 (73.909759521484): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
119 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
120 (153.0647277832): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
121 (47.206878662109): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
122 (70.810317993164): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
123 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
124 (269.17457580566): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
125 (!!!!! 17692.089080811): 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 (87.02278137207): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
127 (48.160552978516): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
128 (537.87231445312): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294796418 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294796418 AND type='deeppockets_item' AND published='1' LIMIT 1
129 (!!!!! 667395.11489868): ( 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 (161.88621520996): ( 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 (507.11631774902): 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 (87.02278137207): 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 (356.91261291504): 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 (72.002410888672): 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 (313.99726867676): 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 (64.849853515625): 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 (542.16384887695): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
138 (437.02125549316): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
139 (327.11029052734): SELECT name FROM jos_deeppockets WHERE id=212
140 (53.882598876953): SELECT name FROM jos_deeppockets WHERE id=212
141 (565.0520324707): 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 '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
142 (463.96255493164): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
143 (81.062316894531): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
144 (62.227249145508): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
145 (!!!!! 10838.985443115): TRUNCATE TABLE jos_trademed_module
146 (138.99803161621): 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=294796418 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
147 (62.942504882812): 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=294796418 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
148 (518.0835723877): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
149 (85.115432739258): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
150 (61.988830566406): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
151 (47.922134399414): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
152 (!!!!! 1343.9655303955): 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 (90.837478637695): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
154 (54.836273193359): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
155 (65.088272094727): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294796418 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294796418 AND type='deeppockets_item' AND published='1' LIMIT 1
156 (41.007995605469): 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=0 or channel_id is null)
157 (72.956085205078): 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=0 or channel_id is null)
158 (65.088272094727): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
159 (152.8263092041): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
160 (75.817108154297): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294796418 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294796418 AND published='1' LIMIT 1
161 (238.89541625977): select jos_twitters.link from jos_twitters where cat=10
162 (29.802322387695): select jos_facebook.link from jos_facebook where cat=10
163 (28.848648071289): select jos_google_plus.link from jos_google_plus where cat=10
164 (25.98762512207): select jos_linkedin.link from jos_linkedin where cat=10
165 (339.98489379883): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
166 (!!!!! 1562.1185302734): insert into jos_banners_delta values (14615,'2025-04-30 14:57:21','18.217.91.183','view'),(14202,'2025-04-30 14:57:21','18.217.91.183','view'),(14203,'2025-04-30 14:57:21','18.217.91.183','view')