In the last decade, several sophisticated and accurate imaging methods such as positron emission tomography have been developed in order to evaluate malignant potential in enlarged mediastinal lymph nodes. This case illustrates an unusual presentation of sarcoidosis that mimicked lymphatic metastases of non small cell lung carcinoma. The reported high specificity and sensitivity of positron emi...

Computer training program was developed to learn the students, studying plasma diagnostics methods, the principles of computer tomography and some algorithms of reconstruction of 3D plasma parameter distributions. The program allows to simulate some spatial distribution of plasma emission, to calculate projections of non-uniform plasma objects and to demonstrate visually the result of restorati...

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The introduction of tomographic imaging revolutionized the way we look at medical images. Compared to X-ray projective image, Computer Tomography (CT) offers the possibility of analyzing anatomical structures on a three-dimensional, slice-to-slice approach. On the other hand, limitations of CT consist of poor soft tissue contrast and ionizing radiation [1], while the advantages are distortion-f...

We present a 39-year old man with mesenteric ischaemia. The initial unenhanced images of the, non-oral contrast CT abdomen clearly demonstrated increased density in a significant length of the small bowel and in the veins of the adjacent mesentery. Mesenteric ischaemia is a difficult diagnosis both clinically and radiologically and we demonstrate the potential benefits of an unenhanced abdomina...

Computer assisted tomography (CAT) in the transverse axial plane, a fundamentally new method of x-ray diagnosis, was developed from I967 to 1972 by G. N. Hounsfield (I973) at the Central Research Laboratories of E.M.I. Ltd. Clinical evaluation of this technique by J. Ambrose (I973) at Atkinson Morley's Hospital has indicated the enormous value of the investigation in patients with intracranial ...

Computer assisted tomography (CAT) systems demand large amounts of time and space. In this paper, we describe an approach to solving the CAT problem using several AI techniques including representation selection and pruning. Rather than backproject intensity data onto a pixel grid or voxel lattice, we solve the problem geometrically -a backprojection region is stored as a convex polygon in a pl...

We examined retrospectively 11 patients with isolated unilateral lower limb lymphedema (clinical criteria confirmed by isotope lymphography) using computer tomography. In conjunction with earlier observations, the findings of soft tissue stranding, skin thickening, fat deposition in the epifascial compartment and perimuscular fascial thickening and edema relate to lymph stasis. This noninvasive...

Over the last decade Computer Tomography (CT) has become a well recognized tool in industrial use. Today CT enables engineers from all kinds of industries to inspect objects from the smallest to the largest scale ranging from electronic devices up to complete car engines. The fast development of CT and its applications was further accelerated over the past 3 years due to the use of CT in metrol...