Computed tomography scanners use an X-ray tube and detector system rotating around the patient to create 3-D images. The X-rays are generated when accelerated electrons hit an anode. These X-rays will travel through the patient’s body being more or less absorbed by different tissues. A detector converts the received X-ray radiation into photons and then the image can be reconstructed. In the co...

The methods of X-ray computed tomography allow us to study the internal morphological structure objects in a non-destructive way. evolution these is similar many respects photography, where complex optics were replaced by mobile phone cameras, and computers built into took over functions high-quality image generation. originated as method hardware non-invasive imaging certain cross-section huma...

The porosity in carbonaceous materials affects many of their properties. For this reason, the characterization of this porosity is very important. Many diverse techniques have been utilized to characterize the pores in carbon materials. Some of these techniques along with the use of X-ray microcomputed tomography (μCT) have been utilized in this study to provide significant insight into the por...

Previous very successful soft X-ray microscopy tomography experiments [1-3] have been performed at a single photon energy. They have provided high spatial resolution, density based 3D images, but with only limited chemical information. We are developing computed angle-scan tomography in a scanning transmission x-ray microscope (STXM) for chemical visualization of a 3D spatial volume. Our goal i...

Phase contrast X-ray tomography (PCT) enables the study of systems consisting of elements with similar atomic numbers. Processing datasets acquired using PCT is nontrivial because of the low-pass characteristics of the commonly used single-image phase retrieval algorithm. In this study, we introduce an image processing methodology that simultaneously utilizes both phase and attenuation componen...

X-ray ptychography is a scanning variant of coherent diffractive imaging with the ability to image large fields of view at high resolution. It further allows imaging of non-isolated specimens and can produce quantitative mapping of the electron density distribution in 3D when combined with computed tomography. The method does not require imaging lenses, which makes it dose efficient and suitabl...

A 60-year-old male presented with dyspnea and chest pain. He was referred with massive bulky mass. A mass in the left lung was observed using chest X-ray (Figures 1).  A computed tomography scan of the chest showed a mass on the left lung with complete lung collapse Figures 2 (A, B). The needle biopsy was performed and the case was diagnosed with solitary fibro...

Introduction One of the central questions in radiological protection is the magnitude of the risks from low doses of radiation, related to the justification and optimization of the diagnostic medical exposures. Therefore, the aim of this study was to estimate the cancer incidence and mortality risks in children of different ages, sizes, and ethnicities undergoing computed tomography examination...