NLS-Diagnosis Of Lung Abscess S.N. Makarova A screening NLS-investigation detected two causes of lung abscess in feverish patients who were complaining of pain in the right hypochondriac region. The patients were subjected to echography in order to preclude an abdominal cavity pathology. The NLS examination was conducted by means of a NLS device equipped with a digital trigger sensor (1.4GHz). Patient N., aged 57, was admitted to the therapeutic department. He was complaining of a week-long fever with a temperature of up to 40C, a moderate non-productive cough and pain in the right hypochondriac region as a result of catching a cold. He came to see a doctor ten days after falling ill. Clinical history included a bilateral pneumonia 14 years previous. The clinical blood analysis indicated an increased leukocyte content - up to 18.7 x 109 with a flush left leukogram. The common urinalysis showed no deviations. Physical examination: vesicular pulmonary respiration, weakened in the lower sections on the right with no rhonchi. The tongue was dry, white furred. The belly was soft, with significant pain in the right hypochondriac region. No symptoms of peritoneum irritation were in evidence. Pasternatski symptom was negative on the right and left. The NLS-investigation of the abdominal cavity did not detect any signs of pathology in the liver, gall bladder or pancreas. On the right were visual blackenings in the diaphragmatic pleura (4-5 points according to Flandler’s scale) and an image of voluminous formation in the right lung (5-6 points). On the dorsal thoracic wall there was an image of an enhanced chromogenic formation (6 points) of a heterogeneous internal structure, sized 8-x65x54 cm. The lung tissue around the nidus had a higher chromogenic density (4-5 points) on account of infiltration. A spectral similarity to the “lung abscess” reference standard (D=0.312) was detected. The investigation of the left lung and pleural cavities did not detect any structural changes. NLS conclusion: certain signs of developing abscess in the right lung. The check radiological investigation arrived at the conclusion: an abscess in the lower lobe of the right lung in progress. A repeated NLS examination was conducted 10 days later. This revealed a rounded hyporchromogenic formation with uneven outlines with some hypochromogenic zones inside, sized 81x60x51 mm. The chromogenic density of the lung tissue around the nidus was somewhat higher (due to infiltration), and the folia of the visceral and parietal pleuras were blackened in the lower sections of the right lung. 21 The patient was offered a further therapy in a specialized surgical department, which he turned down. 3 weeks later, after some anti-inflammatory therapy a check NLS examination was performed. During the examination the patient complained of coughing with a profuse sputum discharge. His temperature was normal, the clinical blood analysis indicated a leukocyte count of 8.6x109, and the differential blood count was within the standard, and ESR grew up to 37 mm/h. The NLS-investigation revealed a rounded formation with even outlines, increased chromogenic density and heterogeneous internal structure sized 47x43. The chromogenic density of the lung tissue around the perimeter decreased (because of reduced infiltration). At the patient’s urgent appeal he was discharged from hospital for further outpatient treatment. Later he underwent two check examinations conducted. Patient M., aged 63, was examined by means of the NLS-method in order to preclude a liver or gall bladder pathology. An NLS-investigation of the lung and pleural cavities was carried out. In the left lung and pleural cavities there were no signs of pathology in evidence. In the right lung in the IX, X and XI hypochondria (from the paravertebral line to the scapular one) the analysis parietally displayed a formation having an increased chromogenic density and sized 85x60 mm with uneven outlines and heterogeneous structure (due to inclusions of a decreased chromogenic density) sized 3-4 mm. The chromogenic density of the lung tissue was not increased. NLS conclusion: signs of an abscess in the right lung. Radiological conclusion: abscess in the lower lobe of the right lung. The patient had check NLS-investigations conducted against the background of antiinflammatory therapy. With the NLS-investigation performed 10 days later the formation looked rounded, had even outlines, an increased chromogenic density (4-5 points) and a heterogeneous internal structure. Around the perimeter of the nidus the lung tissue had an increased chromogenic density (3-4 points) because of infiltration. The formation measured 73x50x60 mm. The NLS-investigation 2 weeks later did not detect any positive dynamics from the administered anti-inflammatory therapy. The submitted clinical observations once again confirm that the NLS-investigation with lung diseases is not used in clinical practice as often as it deserves. Besides, the dynamic NLS-observation of the patients affected by lung diseases enables to assess the efficiency of the employed therapy and reduce the radiation load both on patients and on the medical personnel.