Papers by Soraia Paulo
Analyzing medical volume datasets requires interactive visualization so that users can extract an... more Analyzing medical volume datasets requires interactive visualization so that users can extract anatomo-physiological information in real-time. Conventional volume rendering systems rely on 2D input devices, such as mice and keyboards, which are known to hamper 3D analysis as users often struggle to obtain the desired orientation that is only achieved after several attempts. In this paper, we address which 3D analysis tools are better performed with 3D hand cursors operating on a touchless interface comparatively to a 2D input devices running on a conventional WIMP interface. The main goals of this paper are to explore the capabilities of (simple) hand gestures to facilitate sterile manipulation of 3D medical data on a touchless interface, without resorting on wearables, and to evaluate the surgical feasibility of the proposed interface next to senior surgeons (N = 5) and interns (N = 2). To this end, we developed a touchless interface controlled via hand gestures and body postures to rapidly rotate and position medical volume images in three-dimensions, where each hand acts as an interactive 3D cursor. User studies were conducted with laypeople, while informal evaluation sessions were carried with senior surgeons, radiologists and professional biomedical engineers. Results demonstrate its usability as the proposed touchless interface improves spatial awareness and a more fluent interaction with the 3D volume than with traditional 2D input devices, as it requires lesser number of attempts to achieve the desired orientation by avoiding the composition of several cumulative rotations, which is typically necessary in WIMP interfaces. However, tasks requiring precision such as clipping plane visualization and tagging are best performed with mouse-based systems due to noise, incorrect gestures detection and problems in skeleton tracking that need to be addressed before tests in real medical environments might be performed.
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Breast tissue superposition or parenchymal density have been known as Digital Mammography's (DM) ... more Breast tissue superposition or parenchymal density have been known as Digital Mammography's (DM) main limitations. More expensive and case-specific tools such as MRI and ultrasound imaging may be used to address this problem, but 2D DM remains the most practical and cost-effective approach. Digital Breast Tomo-synthesis (DBT) has the ability to overcome both problems. However, the images produced by this technique are affected by the limited resolution between slices, which combined with a lack of a viewing mode make it difficult to visualize the true 3D structure of the breast. This is unfortunate since stereo static 3D representations can improve real lesion detection. In this paper, we propose a new interactive visualization approach to DBT that explores all three dimensions of the volume data. Our approach allows combining DBT slices to generate a 3D representation of the breast in order to improve the radiologist's depth perception. Preliminary results suggest that this alternative has the potential to achieve similar visual enhancement of lesions, as well as to reduce the time required to locate and classify these.
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Reading room conditions such as illumination, ambient light, human factors and display luminance,... more Reading room conditions such as illumination, ambient light, human factors and display luminance, play an important role on how radiologists analyze and interpret images. Indeed, serious diagnostic errors can appear when observing images through everyday monitors. Typically, these occur whenever professionals are ill-positioned with respect to the display or visualize images under improper light and luminance conditions. In this work, we show that virtual reality can assist radiodiagnostics by considerably diminishing or cancel out the effects of unsuitable ambient conditions. Our approach combines immersive head-mounted displays with interactive surfaces to support professional radiologists in analyzing medical images and formulating diagnostics. We evaluated our prototype with two senior medical doctors and four seasoned radiology fellows. Results indicate that our approach constitutes a viable, flexible, portable and cost-efficient option to traditional radiology reading rooms.
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Conference Presentations by Soraia Paulo
Reading room conditions such as illumination, ambient light, human factors and display luminance,... more Reading room conditions such as illumination, ambient light, human factors and display luminance, play an important role on how radiologists analyze and interpret images. Serious diagnostic errors can appear when observing images through everyday monitors, as these occur whenever professionals are ill-positioned with respect to the display or visualize images under improper light and luminance conditions. In this work, we show that virtual reality can assist
radiodiagnostics by considerably diminishing or canceling out the effects of unsuitable ambient conditions. Our approach combines immersive head-mounted displays with interactive surfaces to
support professional radiologists in analyzing medical images and formulating diagnostics. We evaluated our prototype with two senior medical doctors and four seasoned radiology fellows.
Results indicate that our approach constitutes a viable, flexible, portable and cost-efficient option to traditional radiology reading rooms.
Bookmarks Related papers MentionsView impact
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Papers by Soraia Paulo
Conference Presentations by Soraia Paulo
radiodiagnostics by considerably diminishing or canceling out the effects of unsuitable ambient conditions. Our approach combines immersive head-mounted displays with interactive surfaces to
support professional radiologists in analyzing medical images and formulating diagnostics. We evaluated our prototype with two senior medical doctors and four seasoned radiology fellows.
Results indicate that our approach constitutes a viable, flexible, portable and cost-efficient option to traditional radiology reading rooms.
radiodiagnostics by considerably diminishing or canceling out the effects of unsuitable ambient conditions. Our approach combines immersive head-mounted displays with interactive surfaces to
support professional radiologists in analyzing medical images and formulating diagnostics. We evaluated our prototype with two senior medical doctors and four seasoned radiology fellows.
Results indicate that our approach constitutes a viable, flexible, portable and cost-efficient option to traditional radiology reading rooms.