Abstract：
PURPOSE:This work presents a new monocular peer-to-peer tracking concept overcoming the distinction between tracking tools and tracked tools for optical navigation systems. A marker model concept based on marker triplets combined with a fast and robust algorithm for assigning image feature points to the corresponding markers of the tracker is introduced. Also included is a new and fast algorithm for pose estimation. METHODS:A peer-to-peer tracker consists of seven markers, which can be tracked by other peers, and one camera which is used to track the position and orientation of other peers. The special marker layout enables a fast and robust algorithm for assigning image feature points to the correct markers. The iterative pose estimation algorithm is based on point-to-line matching with Lagrange-Newton optimization and does not rely on initial guesses. Uniformly distributed quaternions in 4D (the vertices of a hexacosichora) are used as starting points and always provide the global minimum. RESULTS:Experiments have shown that the marker assignment algorithm robustly assigns image feature points to the correct markers even under challenging conditions. The pose estimation algorithm works fast, robustly and always finds the correct pose of the trackers. Image processing, marker assignment, and pose estimation for two trackers are handled in less than 18 ms on an Intel i7-6700 desktop computer at 3.4 GHz. CONCLUSION:The new peer-to-peer tracking concept is a valuable approach to a decentralized navigation system that offers more freedom in the operating room while providing accurate, fast, and robust results.
journal_name
Int J Comput Assist Radiol Surgauthors
Strzeletz S,Hazubski S,Moctezuma JL,Hoppe Hdoi
10.1007/s11548-019-02111-zsubject
Has Abstractpub_date
2020-03-01 00:00:00pages
479-489issue
3eissn
1861-6410issn
1861-6429pii
10.1007/s11548-019-02111-zjournal_volume
15pub_type
杂志文章abstract：PURPOSE:Automatic segmentation of anatomical structures and lesions from medical ultrasound images is a formidable challenge in medical imaging due to image noise, blur and artifacts. In this paper we present a segmentation technique with features highly suited to use in noisy 3D ultrasound volumes and demonstrate its ...
journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-015-1239-5
更新日期：2016-01-01 00:00:00
abstract：PURPOSE:Surgical quality in phonomicrosurgery can be improved by open-loop laser control (e.g., high-speed scanning capabilities) with a robust and accurate closed-loop visual servoing systems. A new vision-based system for laser scanning control during robot-assisted phonomicrosurgery was developed and tested. METHOD...
journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-014-1078-9
更新日期：2015-02-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
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更新日期：2016-06-01 00:00:00
abstract：PURPOSE:Delayed cerebral ischemia represents a significant cause of poor functional outcome for patients with vasospasm after subarachnoid hemorrhage. We investigated whether delayed cerebral ischemia could be detected by the arterial opacification of internal carotid artery at the level of the skull base. METHODS:In ...
journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-020-02268-y
更新日期：2020-12-01 00:00:00
abstract：PURPOSE:Diagnosis of neuromuscular diseases in ultrasonography is a challenging task since experts are often unable to discriminate between healthy and pathological cases. A computer-aided diagnosis (CAD) system for skeletal muscle ultrasonography was developed and tested for myositis detection in ultrasound images of ...
journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-014-1133-6
更新日期：2015-09-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-016-1421-4
更新日期：2016-10-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章,评审
doi：10.1007/s11548-013-0927-2
更新日期：2014-03-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-020-02298-6
更新日期：2021-01-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-020-02218-8
更新日期：2020-10-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-015-1329-4
更新日期：2016-07-01 00:00:00
abstract：PURPOSE:Four-dimensional computed tomography (4DCT) images are often marred by artifacts that substantially degrade image quality and confound image interpretation. Human observation remains the standard method of 4DCT artifact evaluation, which is time-consuming and subjective. We develop a method to automatically ide...
journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-017-1538-0
更新日期：2017-09-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-018-1752-4
更新日期：2018-06-01 00:00:00
abstract：PURPOSE:Despite great advances in medical image segmentation, the accurate and automatic segmentation of endoscopic scenes remains a challenging problem. Two important aspects have to be considered in segmenting an endoscopic scene: (1) noise and clutter due to light reflection and smoke from cutting tissue, and (2) st...
journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-015-1331-x
更新日期：2016-08-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-011-0626-9
更新日期：2012-05-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-014-0976-1
更新日期：2014-05-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-018-1758-y
更新日期：2018-07-01 00:00:00
abstract：PURPOSE:An optoelectronic surgical navigation system was used to detect small but measurable translational motion of human hip cadavers in high-range passive motions. Kinematic data were also examined to demonstrate the role of soft tissues in constraining hip translation. METHODS:Twelve cadaver hips were scanned usin...
journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-017-1629-y
更新日期：2017-08-01 00:00:00
abstract：PURPOSE:A frequently mentioned lack of teleoperated surgical robots is the lack of haptic feedback. Haptics are not only able to mirror force information from the situs, but also to provide spatial guidance according to a surgical plan. However, superposition of the two haptic information can lead to overlapping and ma...
journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-020-02118-x
更新日期：2020-03-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-015-1347-2
更新日期：2016-08-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
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doi：10.1007/s11548-013-0919-2
更新日期：2014-01-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
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doi：10.1007/s11548-016-1457-5
更新日期：2016-12-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-020-02293-x
更新日期：2021-01-19 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
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doi：10.1007/s11548-012-0802-6
更新日期：2013-09-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-018-1744-4
更新日期：2018-06-01 00:00:00
abstract：PURPOSE:Prostate carcinoma is a commonly diagnosed cancer in men. Nonsurgical treatment of early stage prostate cancer is an important alternative. The use of MRI for tumor cryoablation is of particular interest: it offers lower morbidity compared with other localized techniques. However, the current manual procedure i...
journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-011-0558-4
更新日期：2011-11-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-017-1628-z
更新日期：2017-08-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-020-02256-2
更新日期：2020-11-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-019-01965-7
更新日期：2019-07-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-010-0534-4
更新日期：2011-09-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
doi：10.1007/s11548-012-0782-6
更新日期：2012-11-01 00:00:00
