Although such techniques avoid dealing with the geometrical factors of the lenses (which main constraints are represented by aberrations, small penetration length, and depth of focus in the SXR range), the employed sources are quite complex and expensive, achieving outstanding results, mainly in the EUV [36] and hard X-ray [37] range, but not in the \"water-window\", where a lower photon flux is obtained. Hence, there is a need to develop compact and user friendly sources that enable the possibility to carry out imaging experiments in university laboratories, with remarkable results. A recently developed droplet-based SXR source operating at \(\lambda\) = 3.37 nm allowed to acquire images with a spatial resolution of \(\sim\)40 nm [38]. A gas-discharge source employing He-like N\({}_{2}\) emission reached a 40 nm spatial resolution at up to 1 kHz source repetition rate [39]. A liquid N\({}_{2}\)-based SXR source at \(\lambda\) = 2.48 nm was employed to demonstrate a compact full field transmission microscope capable to acquire images of biological samples, with a half-pitch spatial resolution of 50 nm and 1 min exposure [40]. Similar sources were also employed to demonstrate laboratory \"water window\" X-ray microscopy of cryo-frozen biological samples approaching a \(\sim\)40 nm spatial resolution in a very short exposure time (10 s) and at a 2 kHz repetition rate [41]. However, the mentioned sources are complicated to use and the setup may occupy a quite large area, limiting their versatility and usability. One of the newer compact developed microscopes, which employs a single gas stream jet, even if simple in construction, has the limitation of acquiring images achieving a resolution of ~100 nm, with an exposure time up to 1-2 h [42]. As it is possible to understand from these few examples, a compromise always has to be found between the size and the versatility of laboratories' compact sources. The 2D imaging techniques are limited in the depth of field, resulting often in the loss of sample details, which are visible only applying a 3D tomographic method. SXR radiation can be employed for tomography, by combining and reconstructing several 2D projections of the same sample, acquired at different angles. Tomographic high-resolution imaging was performed in the \"water window\" spectral range pushing the resolution limit up to 11 nm for inorganic samples [43] and from 25 to 60 nm for biological samples, exploiting internal cellular structures employing cryo-equipment [44; 45; 46]. This new imaging approach has to deal with several technical problems, one of the main consisting of the possibility to acquire images of biological samples before their degradation [47], which, nowadays, can be overcome employing intense pulses from large facilities, such as XFELs [48]. Technological advancements lead to the development of laboratory-compact sources for high-resolution imaging, operating in short wavelengths. In this regard, laser-plasma sources based on a double stream gas-puff target presents several advantages. Employing a high repetition rate laser, such a source can be used continuously, obtaining high photon flux even with a monochromatic radiation emission. The gas-puff target provides an optimal medium with an adequate density profile for the creation of the plasma emitting EUV/SXR radiation, which results twice of that obtainable with a single gas jet, i.e., \(\geq\)12 mg/cc [49]. This ensures a better control over the density, minimizing gradients in the plasma. Moreover, dealing with gases, the source is \"debris free\", since no ablation is produced during the plasma formation, comparing to solid target sources. This last peculiarity offers the possibility to generate the plasma efficiently and to have tens of thousands of shots per day. Finally, the emission spectrum can be easily modified by changing the gas target or tuning the emission by applying appropriate thin film filters. The double gas jet allows to obtain sufficient plasma density and, thus, enough photon flux to acquire microscopy images.