Results 301 to 310 of about 127,254 (333)
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"Low-Probability" Ventilation-Perfusion Scans
Annals of Internal Medicine, 1991To the Editors: Hull and Raskob (1) state that interpreting a ventilation-perfusion scan pattern as low probability ". . . is no longer clinically correct. . .
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Ventilation and perfusion scanning in children
Paediatric Respiratory Reviews, 2000Ventilation and perfusion scintigraphy (VQ scans) provide a relatively non-invasive evaluation of lung function. They indicate the relative blood flow to each lung and allow a quantitative assessment of the perfusion of each lung segment. They can detect areas of abnormal aeration and demonstrate air trapping. However, VQ scanning gives relatively poor
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Fractal Texture Analysis of Perfusion Lung Scans
Computers and Biomedical Research, 2000The purpose of this study is to investigate if fractal texture analysis can assist in the diagnostic interpretation of perfusion lung scans. Forty-five perfusion scans were acquired from patients with clinical suspicion of acute pulmonary embolism (PE) who underwent pulmonary angiography for final diagnosis.
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CHAPTER VIII: Perfusion Lung Scanning
Circulation, 1973Lung scans at 24 hours after the onset of infusion indicated that restoration of pulmonary arterial blood flow was more rapid in patients who received a 12-hour urokinase infusion than in patients treated with heparin alone. Patients with recent emboli (less than 48 hours old) appeared to respond better to urokinase than patients with older emboli (48 ...
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Xenon Ventilation-Perfusion Lung Scans
JAMA, 1978The use of xenon Xe 133 ventilation-perfusion lung scans for the early diagnosis of inhalation injury was evaluated in 67 patients with acute thermal burns. Study results were interpreted as normal if there was complete pulmonary clearance of the radioactive gas by 150 seconds. Thirty-two scans were normal, 32 abnormal, and three technically inadequate.
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Missed Pneumothorax Seen on Ventilation–Perfusion Scan
Clinical Nuclear Medicine, 2002A 38-year-old woman came to the emergency department with acute onset of shortness of breath and pleuritic chest pain. She reported having been on a 4-hour car trip the day before and her medical history was significant for oral contraceptive use. An upright chest radiograph taken in the emergency department was interpreted by the clinician as normal ...
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Perfusion and Ventilation Lung Scanning
1981As in many other branches of respiratory medicine, the use of radionuclides to image the different functions of the lung is a recent development. The clinical application of these techniques began following the work of Wagner in 1963 who used a single intravenous injection of microparticles labelled with a gamma-ray emitting radionuclide and was able ...
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Perfusion scanning in chronic obstructive lung disease
Seminars in Nuclear Medicine, 1971Perfusion scanning has been used to evaluate a heterogenous group of patients exhibiting the wide spectrum of chronic obstructive lung disease. Its major contributions have been in the preoperative evaluation of patients with bullous emphysema and in locating and quantifying the extent of regional perfusion defects.In addition these techniques offer ...
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