4:03 PM Abstract No. 30 Augmented virtual reality assisted treatment planning for splenic artery aneurysms: a pilot study

Devcic, Zlatko; Idakoji, Ibrahim A.; Kesselman, Andrew; Shah, Rajesh P.; Abdelrazek, Mohamed A; Kothary, Nishita

doi:10.1016/j.jvir.2018.01.037

Cited by 8 publications

(5 citation statements)

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“…Moreover, it is also increasingly used for diagnosis since it allows "immersion" in the image to better visualize target areas and therefore improves detection, localization and evaluation of pathologic formations (Elsayed et al, 2020). In interventional radiology the use of virtual reality has been to date restricted mainly to visualization of complex structures before the procedure to improve operator confidence (Devcic et al, 2018) and for practicing interventional procedures using phantoms (Kuhlemann et al, 2017). Beyond the established clinical applications, virtual reality could be employed to study different percutaneous interventions, such as biopsies, ablations, and various infiltrations, and for exploring new potential approach techniques.…”

Section: Introductionmentioning

confidence: 99%

Quantification of the Interventional Approaches Into the Pterygopalatine Fossa by Solid Angles Using Virtual Reality

et al. 2021

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Virtual reality is increasingly used in medicine for diagnostics, for visualisation of complex structures and for preoperative planning. In interventional radiology, minimally invasive approach could be described with a target point representing the desired needle tip position and an array of all possible trajectories leading to it resembling irregular “cone” or “pyramid”. We present a pilot study of planning a minimally invasive posterior infrazygomatic and suprazygomatic approaches into the pterygopalatine fossa using a solid angle as a measure of size of the approach in five virtually reconstructed heads. The minimally invasive approaches were planned by manually drawing the edges of “pyramids” that described each approach in 3D using virtual reality program Tracer. For each head, a transverse diameter was measured and for each approach a solid angle size, average edge length and estimated area on the skin from where the target point could be reached were calculated. We found that, the solid angle of posterior infrazygomatic approach was significantly larger than suprazygomatic approach (p0.001). Furthermore, the transverse head diameter and solid angle in posterior infrazygomatic approach were negatively correlated (ρ=-0.55, p=0.0002), while transverse head diameter and the estimated area on the skin from where the target point could be reached in the suprazygomatic approach were positively correlated (ρ=0.37, p=0.0206). In conclusion, our findings provide important preliminary evidence on the feasibility of evaluating and comparing different minimally invasive approaches using virtual reality systems, and affirm the validity of solid angle as a measure of the size of the approach.

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Section: Introductionmentioning

confidence: 99%

Quantification of the Interventional Approaches Into the Pterygopalatine Fossa by Solid Angles Using Virtual Reality

et al. 2021

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“…Within interventional radiology, Devcic et al has recently reported no difference in standard rendering when compared to VR ( P = .14) in preoperative planning in splenic artery aneurysm repair using CT angiography. With the ability to analyze and manipulate 3D images in VR, operators had improved confidence (14). These results of diagnostic equivalence between VR and standard display within pathology and interventional radiology, combined with our findings of no significant difference in sensitivity in lung nodule detection for majority of diagnostic radiologists, are promising for the future development of VR in medical imaging.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Virtual Reality for Detection of Lung Nodules on Computed Tomography

et al. 2018

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Virtual reality (VR) systems can offer benefits of improved ergonomics, but their resolution may currently be limited for the detection of small features. For detection of lung nodules, we compared the performance of VR versus standard picture archiving and communication system (PACS) monitor. Four radiologists and 1 novice radiologist reviewed axial computed tomography (CTs) of the thorax using standard PACS monitors (SM) and a VR system (HTC Vive, HTC). In this study, 3 radiologists evaluated axial lung-window CT images of a Lungman phantom. One radiologist and the novice radiologist reviewed axial lung-window patient CT thoracic images (32 patients). This HIPAA-compliant study was approved by the institutional review board. Detection of 227 lung nodules on patient CTs did not result in different sensitivity with SM compared with VR. Detection of 23 simulated Lungman phantom lung nodules on CT with SM resulted in statistically greater sensitivity (78.3%) than with VR (52.2%, P = .041) for 1 of 3 radiologists. The trend was similar but not significant for the other radiologists. There was no significant difference in the time spent by readers reviewing CT images with VR versus SM. These findings indicate that performance of a commercially available VR system for detection of lung nodules may be similar to traditional radiology monitors for assessment of small lung nodules on CTs of the thorax for most radiologists. These results, along with the potential of improving ergonomics for radiologists, are promising for the future development of VR in diagnostic radiology.

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“…The rendering of two-dimensional images is discussed as a possible solution to this issue [1,13]. Namely, cross-sectional images can be fused into a three-dimensional representation of data, for instance, in virtual reality (VR) [14,15], augmented reality (AR) [15,16], on stereoscopic displays [17,18], or on volumetric displays [19,20].…”

Section: Three-dimensional Visualization Methods For Radiologistsmentioning

confidence: 99%

Visual Search Performance and Strategy for Three-Dimensional Visualization Systems: Impact of Radiologist Experience

et al. 2019

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The visual search performance of radiologists is systematically challenged due to the use of flat-panel displays when viewing multi-slice images. Three-dimensional visualization of information is expected to facilitate visual search for radiologists. However, as the differences in user performance, depending on radiologist experience, have not yet been assessed for real three-dimensional images, it is difficult to estimate the usability of new visualization systems for radiologists with different amounts of professional search experience. In this study, we aimed to determine how three-dimensional visual search is affected by radiologist experience and the physical properties of stimuli. Radiologists, residents, and medical students accomplished visual search tasks with varying set sizes and target-distractor similarities. Search items were presented on multiple display planes and image manipulation was conducted using a computer keyboard. We compared the search outcome and strategy among three groups of participants. All three groups submitted a similar number of correct responses depending on target-distractor similarity. However, in contrast to radiologists and residents, it took a considerably longer time for students to find the targets. The major differences were evident in search strategy when comparing the image manipulations of radiologists with those of residents and students. Our results demonstrated that experienced radiologists’ search performance benefited from seeing the entire three-dimensional view of an image, whereas residents and students focused instead on reducing the amount of information and searched in a selective manner. These findings should be taken into account when planning the implementation of new workstations with three-dimensional visualization in radiology.

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4:03 PM Abstract No. 30 Augmented virtual reality assisted treatment planning for splenic artery aneurysms: a pilot study

Cited by 8 publications

References 0 publications

Quantification of the Interventional Approaches Into the Pterygopalatine Fossa by Solid Angles Using Virtual Reality

Quantification of the Interventional Approaches Into the Pterygopalatine Fossa by Solid Angles Using Virtual Reality

Evaluation of Virtual Reality for Detection of Lung Nodules on Computed Tomography

Visual Search Performance and Strategy for Three-Dimensional Visualization Systems: Impact of Radiologist Experience

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