A COMPREHENSIVE REVIEW ON MULTI-VIEW CHEST X-RAY 3D RECONSTRUCTION FOR ENHANCED THORACIC DISEASE DIAGNOSIS
Keywords:
Chest Radiography, X-ray Imaging, Medical Imaging, Neural Rendering, 3D Volume Reconstruction, 2D-to-3D Conversion, Deep Learning in Radiology, Computer Vision in Healthcare, Neural Implicit Representations, Volumetric Medical Data, AI in Diagnostic Imaging, Image-based Reconstruction, Clinical Imaging AnalysisAbstract
In thoracic medicine, accurate diagnosis is crucial to patient care. If not identified early and correctly, thax-related conditions such as pneumonia, tuberculosis, lung cancer, and other cardiopulmonary diseases can have serious health consequences. Therefore, one of the most important steps in improving patient outcomes is increasing diagnostic accuracy. Because of their affordability, speed, and accessibility, chest X-rays (CXRs) are one of the most widely used imaging methods; however, they are essentially 2D predictions of 3D anatomical structures. The depth information is compressed by this flat representation, which frequently results in overlapping anatomical features. Because of this, it may be difficult to determine the precise location, size, or depth of lesions, which could result in a misdiagnosis or misunderstanding. Techniques for multi-view 3D reconstruction are being investigated in order to get around the drawbacks of 2D imaging. The goal of these techniques is to use several 2D X-ray views to create a 3D volumetric representation of the thorax. Clinicians will gain a better understanding of spatial connections within the thoracic cavity as a result, which will be especially helpful for lung pathologies, tumor localization, and surgical planning. Recent developments in deep learning and 3D vision have given rise to Neural Radiance Fields (NeRFs) — deep neural networks that learn to encode 3D scenes from multiple 2D images. A variant specifically designed for the medical imaging setting, called MedNeRF (Medical Neural Radiance Fields), is utilized in this work. MedNeRF is made suitable for medical imaging settings and can learn the volumetric shape of the thorax from multiple X-ray views. NeRFs learn by optimizing a neural network to produce color and density values along rays intersecting a scene. For medicine, this enables the model to encode intricate internal structures such as ribs, lungs, and heart tissues into a coherent 3D model.
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