Abstracts XIX Brazilian Congress of Nuclear Medicine

Article Nº AJ02-15

10. PNEUMOLOGY

The distribution of radioactive aerosol (DTPA-Tc99m) on the bronchial tree depends on the gas flow, geometry, airway resistance and the size of the particles inhaled. Regional pulmonary ventilation with the use of muscular ventilation patterns (MVP) are composed by a combination of patterns such as air flow, respiratory breath and the relation between inspiration and expiration times. This study compared the scintigraphic patterns of pulmonary regional ventilation, based on the distribution of radioactive aerosol (DTPA-Tc99m) inhaled, after physiologic(diaphragmatic) inspiration and a muscular ventilation pattern(three phase fraction) inspiration. The study group consisted of five volunteers (mean age 27 &plusmn; 7y). All volunteers were submitted to two pulmonary scintigraphic exams. The first was the diaphragmatic inspiration pattern (control) and the second was the muscular ventilation pattern(three phase fraction) inspiration. The pulmonary deposition of radioactive aerosol were compared based on the number of counts per pixel per area, each lung was divided on three segments. Data based on the media and standard deviation suggest a reexpansion of both lungs, with an increase of the total pulmonary capacity. The result of the T student test demonstrated an increased airflow to the superior segments of both lungs and to the medial segment of the right lung (p<0,05). The other pulmonary segments did not have a significant change (p>0,05).

1.Cardiology |  2.Endocrinology | 3.Equipment: Quality Control | 4.Gastroenterology |  5.Infectious Diseases |  6.Nephro-Urology |  7.Oncology |  8.Orthopheadics | 9.PET/SPECT | 10.Pneumology |  11.Radiobiology |  12.Radiopharmacy |  13.Special Clinical Applications |  14.Neuropsychiatry |