Immersive Virtual Colonoscopy

Mirhosseini, Seyedkoosha; Gutenko, Ievgeniia; Ojal, Sushant; Marino, Joseph; Kaufman, Arie

doi:10.1109/tvcg.2019.2898763

Cited by 21 publications

(15 citation statements)

References 58 publications

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“…This is not quantifiable in the physical world and may serve as a novel benchmark regarding the performance of a VR user. www.nature.com/scientificreports/ (VC) procedures 38 . In a different and complex domain, the assessment of congenital heart diseases, a successful integration of the VR method mentioned above, combined with 3D print of the cardiac atria, was carried out 39 .…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, it can be mentioned that the discussed VR application only constitutes a platform for any kind of clinical or research 3D data. Therefore, investigations have already been initiated to evaluate a generalizability to other medical subspecialties, which can be useful for abdominal CT exploration, especially for instance for non-invasive clinical virtual colonoscopy (VC) procedures 38 . In a different and complex domain, the assessment of congenital heart diseases, a successful integration of the VR method mentioned above, combined with 3D print of the cardiac atria, was carried out 39 .…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Validation of virtual reality orbitometry bridges digital and physical worlds

Maloca

Faludi

Żelechowski

et al. 2020

Sci Rep

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Clinical science and medical imaging technology are traditionally displayed in two dimensions (2D) on a computer monitor. In contrast, three-dimensional (3D) virtual reality (VR) expands the realm of 2D image visualization, enabling an immersive VR experience with unhindered spatial interaction by the user. Thus far, analysis of data extracted from VR applications was mainly qualitative. In this study, we enhance VR and provide evidence for quantitative VR research by validating digital VR display of computed tomography (CT) data of the orbit. Volumetric CT data were transferred and rendered into a VR environment. Subsequently, seven graders performed repeated and blinded diameter measurements. the intergrader variability of the measurements in VR was much lower compared to measurements in the physical world and measurements were reasonably consistent with their corresponding elements in the real context. The overall VR measurements were 5.49% higher. As such, this study attests the ability of VR to provide similar quantitative data alongside the added benefit of VR interfaces. VR entails a lot of potential for the future research in ophthalmology and beyond in any scientific field that uses three-dimensional data. Orbital tumors can either be primary, arising from structures within the orbit, or secondary, due to metastatic spread of a primary tumor elsewhere 1-3. A myriad of clinical findings suggest the presence of an orbital mass, namely proptosis, diplopia, pain, conjunctival congestion and varying degrees of visual loss 4,5. Diagnosis relies on adequate clinical examination and orbital imaging like magnetic resonance imaging (MRI) and/or computed tomography (CT) 6. Despite the great progress in medical imaging, the diagnosis of orbital lesions based on neuroimaging features may lack characteristic imaging features. Often, the diagnosis of specific orbital disorders such as Graves' disease associated orbitopathy, orbital inflammation, orbital lymphoma, lacrimal gland epithelial tumor, metastatic carcinoma, and vascular orbital lesions is ambiguous 7-10. Confirmation of the diagnosis frequently relies on a biopsy which can be technically challenging and prone to complications due to the dense arrangement of tissue or inaccessibility of many of these lesions 11. Visualization of orbital lesions is still based on pre-surgery image assessment of two-dimensional (2D) data visualization on a computer monitor or on intraoperative exploration 12,13. There are increasing possibilities for presentation and interaction with virtual reality 14. In this context, virtual reality (VR) has recently been optimized as an enhanced medical image display method and showed to safeguard visual comfort 15,16. The main objective of this study was to extend current medical image display and validate the level of spatial precision in orbitometry of CT data, representing the physical world, compared to precision in three-dimensional (3D) virtual reality for the first time. This is especially important when new ways are explored to use ...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Validation of virtual reality orbitometry bridges digital and physical worlds

Maloca

Faludi

Żelechowski

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Despite suggesting potential improvement in reducing examination time and enhancing accuracy, this type of setup would be unrealistic in a natural clinical setting. More recently, Mirhosseini et al proposed an immersive CTC system that leverages VR's advantages to improve lesion detection [34] while still relying on 2D interaction techniques. Similarly, Randall et al explored an immersive VR prototype, obtaining encouraging feedback regarding overall faster diagnosis [35].…”

Section: Related Workmentioning

confidence: 99%

Controlling camera movement in VR colonography

et al. 2022

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Immersive Colonography allows medical professionals to navigate inside the intricate tubular geometries of subject-specific 3D colon images using Virtual Reality displays. Typically, camera travel is performed via Fly-Through or Fly-Over techniques that enable semi-automatic traveling through a constrained, welldefined path at user-controlled speeds. However, Fly-Through is known to limit the visibility of lesions located behind or inside haustral folds. At the same time, Fly-Over requires splitting the entire colon visualization into two specific halves. In this paper, we study the effect of immersive Fly-Through and Fly-Over techniques on lesion detection and introduce a camera travel technique that maintains a fixed camera orientation throughout the entire medial axis path. While these techniques have been studied in non-VR desktop environments, their performance is not well understood in VR setups. We performed a comparative study to ascertain which camera travel technique is more appropriate for constrained path navigation in Immersive Colonography and validated our conclusions with two radiologists. To this end, we asked 18 participants to navigate inside a 3D colon to find specific marks. Our results suggest that the Fly-Over technique may lead to enhanced lesion detection at the cost of higher task completion times. Nevertheless, the Fly-Through method may offer a more balanced trade-off between speed and effectiveness, whereas the fixed camera orientation technique provided seemingly

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“…Early adopters such as NASA have shown the value of using VR in wind tunnel simulations [9]. Later on, it has been used for volume rendering [21,49,50], trajectory analysis [29], diagnostic colonoscopy [40,41] and even archaeology [4], to name a few. We refer the interested reader to Mariott et al's [37] detailed analysis of the potential uses of immersive visualizations for more examples.…”

Section: Virtual Realitymentioning

confidence: 99%