Contrast agent/medium, any internally administered substance that has a different opacity from soft tissue on radiography or computed tomography [CT]; includes barium [钡], used to opacify parts of the gastrointestinal tract [胃肠道]; water-soluble iodinated [碘化] compounds, used to opacify blood...
In contrast, more advanced models such as Vision Transformer (ViT), Swin Transformer, and ConvNexT achieved higher accuracies of 98.71%, 96.44%, and 96.44%, respectively. These findings highlight the superior performance of these newer architectures over Alex-Net. While Alex-Net has a well-...
Of these, the effective contrast modulation is the only parameter that depends on the system resolution. We present a model that estimates the relative importance of the different factors affecting the success of a radiographic technique. Only for very small globular flaws and materials with very ...
The aetiology of heart failure with preserved ejection fraction (HFpEF) is heterogenous and overlaps with that of several comorbidities like atrial fibrill
In contrast with that from SARS, more than half of the patients with cardiac injury experienced in-hospital death in this study, indicating that COVID-19–induced cardiac injury is associated with major adverse clinical outcomes. However, the mechanism of cardiac injury among these patients with ...
Three- and four-dimensional computed tomographic angiography and venography for the investigation of the vascular anatomy and perfusion of perforator flaps. Two-dimensional contrast radiography is the current standard for investigating the vascular anatomy of surgical flaps. The microvascular anatomy of the...
1. With high frequency inverter to emit high quality X-ray and low dose on skin, and ensure excellent definition and contrast of pictures. 2. With techniques of KV analog closed loop control, mAs digital closed loop control and micro-processing real-time contro...
single-crystal perovskites are not feasible for the fabrication of thin-film detectors. By contrast, perovskite nanocrystals, particularly all-inorganic caesium lead halide (CsPbBr3), can be easily fabricated into large-scale thin films22,23,24. Moreover, these nanocrystals combine the merits of eff...
In contrast to cancellous bone, the cortical bone does not exhibit significant deformation and degeneration with increasing age [1]. The cortical bone trajectory (CBT) technique was first proposed by Santoni et al. in 2009 [2]. Compared with the conventional pedicle screw technique, it used the...
Computed tomography of x-ray index of refraction using the diffraction enhanced imaging method. Diffraction enhanced imaging (DEI) is a new, synchrotron-based, x-ray radiography method that uses monochromatic, fan-shaped beams, with an analyser crysta... FA Dilmanian,Z Zhong,B Ren,... - 《...