Dataset Information

Realization of real-time X-ray stereoscopic vision during interventional procedures.

ABSTRACT: During interventional procedures, the deficiencies of nonstereoscopic vision increase the difficulty of identifying the anteroposterior direction and pathways of vessels. Therefore, achieving real-time stereoscopic vision during interventional procedures is meaningful. Pairs of X-ray images were captured with identical parameter settings, except for different rotation angles (represented as the ? angle). The resulting images at these ? angles were used as left-eye and right-eye views and were horizontally merged into single left-right 3D images. Virtual reality (VR) glasses were used for achieving stereo vision. Pairs of X-ray images from four angiographies with different ? angles (1.8-3.4°) were merged into left-right 3D images. Observation with VR glasses can produce realistic stereo views of vascular anatomical structure. The results showed that the optimal ? angles accepted by the brain for generating stereo vision were within a narrow range (approximately 1.4-4.1°). Subsequent tests showed that during transcatheter arterial chemoembolization, 3D X-ray stereoscopic images provided significantly improved spatial discrimination and convenience for identifying the supply vessels of a liver tumor and its anteroposterior direction compared with plain X-ray images (all P?

SUBMITTER: Deng K

PROVIDER: S-EPMC6203764 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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Realization of real-time X-ray stereoscopic vision during interventional procedures.

Deng Kai K Wei Bo B Chen Mo M Huang Zhiyin Z Wu Hao H

Scientific reports 20181026 1

During interventional procedures, the deficiencies of nonstereoscopic vision increase the difficulty of identifying the anteroposterior direction and pathways of vessels. Therefore, achieving real-time stereoscopic vision during interventional procedures is meaningful. Pairs of X-ray images were captured with identical parameter settings, except for different rotation angles (represented as the α angle). The resulting images at these α angles were used as left-eye and right-eye views and were ho ...[more]

PMID: 30367084

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Project description:Aims: This study investigated the feasibility and accuracy of real-time three-dimensional (3D) echocardiographic transilluminated imaging (TrueVue Glass) in left atrial appendage (LAA) anatomical morphology and artificial intelligence (AI)-assisted 3D automated LAA measurement (3D Auto LAA) software in the preoperative evaluation of LAA occlusion (LAAO) in patients with atrial fibrillation (AF). Method and results: Thirty-seven patients with AF were selected. Two-dimensional (2D) and real-time 3D transesophageal echocardiography (RT3D-TEE) were performed preoperatively, using conventional 3D, the new 3D TrueVue Glass mode, and cardiac computed tomography angiography (CCTA) to assess and type the morphology of LAA. Physiological parameters were measured using traditional 2D and 3D manual (3D Manual LAA), 3D Auto LAA, and CCTA. TrueVue Glass for LAA outer contour display was compared with CCTA. Comparisons were based on correlation and consistency in measuring the maximum diameter (LZ max), minimum diameter (LZ min), area (LZ area), and circumference (LZ cir) of LAA landing zone (LZ). Times and variabilities were compared. The concordance rate for external shape of LAA was 97.14% between TrueVue Glass and CCTA. 3D Auto LAA and 3D Manual LAA have a stronger correlation and higher consistency in all parameters. 3D Auto LAA showed higher intra- and interobserver reproducibility and allowed quicker analysis (p < 0.05). LAAO was performed in 35 patients (94.59%), and none of which had serious adverse events. Conclusion: TrueVue Glass is the first non-invasive and radiation-free visualization of the overall external contour of LAA and its adjacent structures. 3D Auto LAA simplifies the measurement, making the preoperative assessment more efficient and convenient while ensuring the accuracy and reproducibility. A combination of the two is feasible for accurate and rapid assessment of LAA anatomy and physiology in AF patients and has practical application in LAAO.

Project description:ObjectiveTo characterize use of uterine tamponade and interventional radiology procedures.MethodsThis retrospective study analyzed uterine tamponade and interventional radiology procedures in a large administrative database. The primary outcomes were temporal trends in these procedures 1) during deliveries, 2) by hospital volume, and 3) before hysterectomy for uterine atony or delayed postpartum hemorrhage. Three 3-year periods were analyzed: 2006-2008, 2009-2011, and 2012-2014. Risk of morbidity in the setting of hysterectomy with uterine tamponade and interventional radiology procedures as the primary exposures was additionally analyzed in adjusted models.ResultsThe study included 5,383,486 deliveries, which involved 6,675 uterine tamponade procedures, 1,199 interventional radiology procedures, and 1,937 hysterectomies. Interventional radiology procedures increased from 16.4 to 25.7 per 100,000 delivery hospitalizations from 2006-2008 to 2012-2014 (P<.01), and uterine tamponade increased from 86.3 to 158.1 (P<.01). Interventional radiology procedures use was highest (45.0/100,000 deliveries, 95% CI 41.0-48.9) in the highest and lowest (8.9/100,000, 95% CI 7.1-10.7) in the lowest volume quintile. Uterine tamponade procedures were most common in the fourth (209.8/100,000, 95% CI 201.1-218.5) and lowest in the third quintile (59.8/100,000, 95% CI 55.1-64.4). Interventional radiology procedures occurred before 3.3% of hysterectomies from 2006 to 2008 compared with 6.3% from 2012 to 2014 (P<.05), and uterine tamponade procedures increased from 3.6% to 20.1% (P<.01). Adjusted risks for morbidity in the setting of uterine tamponade and interventional radiology before hysterectomy were significantly higher (adjusted risk ratio [aRR] 1.63, 95% CI 1.47-1.81 and aRR 1.75 95% CI 1.51-2.03, respectively) compared with when these procedures were not performed.ConclusionThis analysis found that uterine tamponade and interventional radiology procedures became increasingly common over the study period, are used across obstetric volume settings, and in the setting of hysterectomy may be associated with increased risk of morbidity, although this relationship is not necessarily causal.

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Realization of real-time X-ray stereoscopic vision during interventional procedures.

Publications

Realization of real-time X-ray stereoscopic vision during interventional procedures.

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