Abstract：
PURPOSE:To assess retrospectively the clinical accuracy of an magnetic resonance imaging-guided robotic prostate biopsy system that has been used in the US National Cancer Institute for over 6 years. METHODS:Series of 2D transverse volumetric MR image slices of the prostate both pre (high-resolution T2-weighted)- and post (low-resolution)- needle insertions were used to evaluate biopsy accuracy. A three-stage registration algorithm consisting of an initial two-step rigid registration followed by a B-spline deformable alignment was developed to capture prostate motion during biopsy. The target displacement (distance between planned and actual biopsy target), needle placement error (distance from planned biopsy target to needle trajectory), and biopsy error (distance from actual biopsy target to needle trajectory) were calculated as accuracy assessment. RESULTS:A total of 90 biopsies from 24 patients were studied. The registrations were validated by checking prostate contour alignment using image overlay, and the results were accurate to within 2 mm. The mean target displacement, needle placement error, and clinical biopsy error were 5.2, 2.5, and 4.3 mm, respectively. CONCLUSION:The biopsy error reported suggests that quantitative imaging techniques for prostate registration and motion compensation may improve prostate biopsy targeting accuracy.
journal_name
Int J Comput Assist Radiol Surgauthors
Xu H,Lasso A,Guion P,Krieger A,Kaushal A,Singh AK,Pinto PA,Coleman J,Grubb RL 3rd,Lattouf JB,Menard C,Whitcomb LL,Fichtinger Gdoi
10.1007/s11548-013-0831-9subject
Has Abstractpub_date
2013-11-01 00:00:00pages
937-44issue
6eissn
1861-6410issn
1861-6429journal_volume
8pub_type
杂志文章abstract：PURPOSE:To support preoperative planning of bone drilling for Microendoscopic Discectomy, we present a set of interactive bone-drilling methods using a general 2D pointing device. METHODS:Unlike the existing methods, our framework has the following features: (1) the user can directly cut away arbitrary 3D regions on t...
journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
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abstract：PURPOSE:Our particular motivator is the need for screening HIV+ populations in resource-constrained regions for the evidence of tuberculosis, using posteroanterior chest radiographs (CXRs). METHOD:The proposed method is motivated by the observation that abnormal CXRs tend to exhibit corrupted and/or deformed thoracic ...
journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
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abstract：PURPOSE:Minimally invasive interventions offer benefits for patients, while also entailing drawbacks for surgeons, such as the loss of depth perception. Thus estimating distances, which is of particular importance in gastric bypasses, becomes difficult. In this paper, we propose an approach based on stereo endoscopy th...
journal_title：International journal of computer assisted radiology and surgery
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journal_title：International journal of computer assisted radiology and surgery
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journal_title：International journal of computer assisted radiology and surgery
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journal_title：International journal of computer assisted radiology and surgery
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章,评审
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journal_title：International journal of computer assisted radiology and surgery
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更新日期：2017-12-01 00:00:00
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journal_title：International journal of computer assisted radiology and surgery
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journal_title：International journal of computer assisted radiology and surgery
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journal_title：International journal of computer assisted radiology and surgery
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journal_title：International journal of computer assisted radiology and surgery
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journal_title：International journal of computer assisted radiology and surgery
pub_type： 杂志文章
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journal_title：International journal of computer assisted radiology and surgery
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