Puropose of the study. Basing on the previously obtained results on the proven high efficiency of magnetic resonance imaging (MRI) of the chest organs in the visualization of major lung diseases, in the current period of mass incidence of viral pneumonia (VP) caused by COVID-19, we tried to study the possibility of using MRI OGK to image lung damage in this pathology both in primary detection and for follow-up reconvalescence control.Material and methods. MRI of the chest in T1 -, T2-weighted modes (T1-w, T2-w), also with fat suppression, diffusion-weighted, STIR-modes, in the axial and frontal planes, with breath holding, or with automatic synchronization of acquisition with breathing was carried-out in 47 patients with VP of various severity, 32 of them were confirmed by PCR as COVID-19, all did have a clinic of pneumonia. The control group comprised 15 volunteers, of them 8 non-smokers, and 7 smokers. In 18 patients, an CT study of the chest was also performed, with a step of 0.5–1.25 mm, with full coverage of the chest and reconstruction of axial and frontal slices, with a comparison of MRI and CT of the chest. In 8 patients, MRI of the chest was then performed again, for follow-up control of clinical recovery. There were no deaths among our patientsResults. The duration of a complete MRI examination of the chest was less than 25 minutes in all cases (21 ± 4 minutes on average), and less than 10 minutes in the chest CT. In all cases, MRI imaging of the affected area was achieved using a group of MRI protocols, which included axial T1-w and axial and frontal T2-w, and lasted < 12 minutes, counting the time for laying the patient.In normal patients without pathology of the lungs, not smoking, the lung was visualized as a diffuse homogeneous air region with a minimum share interstitial and vascular space. In patients - smokers, lung MRI was slightly enhanced in the dorsal parts of both lungs, disorders of airiness and interstitial exudative changes weren't present. In the acute phase of the disease, pulmonary ventilation disorders and interstitial exudative changes that form the morphological basis of lung damage in COVID-19 were visualized as local, corresponding to the location and nature (sub-segmental, segmental, polysegmental) of the pathological focus, both T1-w and T2-w modes. MRI of the chest provided diagnosis of lung pathology in all cases, while the extent of the pathological focus on the MRI image in T2-w was 14–19% greater than on the CT. The correlation of the calculated volume of affected lung tissue between CT and MRI of the chest wasas high as r = 0.95 (p < 0.001). The values of the volume of the affected tissue in T1-w and T2-w did not differ from each other in the intergroup comparison and correlated strongly and reliably, r = 0.985 (p < 0.001). MRI in DWI mode showed a sensitivity of 81% (38/47) in detecting COVID-lung lesions. The duration of DWI in all cases was more than 6 minutes, more than twice as long as all other MRI protocols together. The volume of pleural effusion, clearly visible with T2-VI, in all our cases did not exceed 100 ml. In a prospective follow-up of 8 patients with COVID-19, chest MRI ptovided evidence-based visualization of the recovery process in all cases, with a decrease or complete regression of the exudation component.Conclusion. MRI of the chest with respiratory synchronization or with breath-holding can be used for early diagnosis of inflammatory lung lesions in COVID-viral pneumonia and for subsequent follow-up control, is not accompanied by radiation exposure and closely correlates with the results of chest CT recruited as a modern standard for the diagnosis of pneumonia.

Purpose of the study. To evaluate the practical significance of MRI in the primary diagnosis of inflammatory lung diseases, as well as in follow-up control of treatment, also in comparison with the results of CT of the chest.Material and Methods. In 25 patients with acute pneumonia, six of them with acute myocardial infarction developed as complication of it, the MRI of the chest organs was performed in T1 - and T2-weighted (-w.) modes, also with fat signal suppression, with slice thickness of 2.5 to 5 mm, in a matrix of 256 × 256 or 256 ×392 pixels, with a scanning field of view as large as 40 x 40 cm. In T1-w. mode TR = 390–650 ms, TE = 10–15 ms. When T2-w. scanning, respectively, TR = 2900 -4000 ms, TE = 20–25 ms. Paramagnetic contrast enhancement was also carried out in 16 of 24 patients, at a dosage of 0.1 mmol/kg of body weight. Post-contrast images were acquired 12-17 minutes after the introduction of paramagnetic agent. In 17 out of 25 of our patients, chest CT was also performed.Results. The minimal cross-dimension of focal inflammatory lesions for community-acquired pneumonia, imaged with MRI chest scanning was as little as 9 х 21 mm. The dimensions of lung lesion obtained from the MRI scanning did correlate significantly with results of the CT (r = 0.96, p < 0.001). Also MRI of the lung did prove the successful cure of pneumonia. Also in six cases the MRI verified the acute myocardial infarction occurred as complication of severe pneumonia. Based on the results of MRI of the lungs and chest, the treatment strategy was supplemented in 16 cases and significantly changed in 9 cases.Conclusion. MRI of the lungs employing the T1- and T2-weighted protocols with fat suppression, diffusionweighted imaging and use of contrast enhancement delivers highly efficient technique of imaging of nodal, segment and lobe inflammation. MRI of the chest should be reasonably employed for diagnosis and follow-up of treatment in hospitals and diagnostic units possessing high- and middle-field MRI scanners able toacquire the images in breath-synchronised mode.

Computed tomography for coronavirus infection (COVID-19) is effective not only in making a diagnosis, but also in timely and accurately detecting some complications of this disease in different organs and systems. The paper shows various complications of coronavirus infection that a radiologist may face in practice, which develop both in the natural course and due to therapy for COVID-19, including hemorrhagic and thrombotic events in coagulopathy, pneumothorax, and pneumomediastinum as a result of the direct cytotoxic effect of SARS-CoV-2 on pneumocytes, and barotrauma during mechanical ventilation, as well as pathological fractures due to osteoporosis, including steroid osteoporosis that has developed during therapy with glucocorticosteroids. It considers the main causes and pathogenesis of various complications of coronavirus infection.

Fecal stones are a collection of solid feces, most often in the distal colon. The formation of fecal stones occurs in people with damage to the autonomic nervous system (Chagas or Hirschsprung's disease), elderly patients suffering from prolonged constipation. Symptoms of coprolites are usually not specific (discomfort in the abdomen, constipation followed by severe diarrhea, weight loss). At clinical examination it is possible to suspect tumor formation. In diagnosis using a colonoscopy, X-ray methods (irrigoscopy, radiography of the abdomen, CT, MRI). The occurrence of fecal concretions can lead to complications such as intestinal obstruction, bedsores in the area of the fit of the stone, ulcers, bleeding, perforation, fecal peritonitis, the formation of a tumor process in the intestinal wall. Treatment is often conservative, in complicated cases surgery.Present a rare case of intestinal obstruction in an 85-year-old male with colostoma caused by obstruction by a giant fecal calculus in an atypical location (proximal colon), with an erased clinical picture and diagnostic difficulties.