High resolution yttrium-90 ((90)Y) imaging of post-radioembolization microsphere biodistribution may be achieved by conventional positron emission tomography with integrated computed tomography (PET/CT) scanners that have time-of-flight capability. However, reconstructed (90)Y PET/CT images have high background noise, making non-target activity detection technically challenging. This educationa...

Tracheal mucous velocity measurements were made in 24 beagle dogs in five age groups, using a gamma camera to detect movement of instilled 99mTc-macroaggregated albumin. Age groups were defined as immature (9-10 mo), young adult (2.8-3.0 yr), middle aged (6.7-6.9 yr), mature (9.6-9.8 yr), and aged dogs (13.6-16.2 yr). Mean velocities were 3.6 +/- 0.4 (SE) mm/min in the immature dogs, 9.7 +/- 0....

We treated a 68-year-old man with cirrhosis of the liver associated with moderate hypoxemia. Contrast-enhanced echocardiography revealed late opacification of the left ventricle, and pulmonary perfusion imaging with 99mTc macroaggregated albumin showed evidence of a significant uptake in both lungs and in the liver, spleen, and kidneys. Right cardiac catheterization revealed pulmonary hypotensi...

Radioembolization (RE) with Yttrium-90 ((90)Y) microspheres is an effective treatment for unresectable liver tumors. The activity of the microspheres to be administered should be calculated based on the type of microspheres. Technetium-99m macroaggregated albumin ((99m)Tc-MAA) single photon emission computed tomography/computed tomography (SPECT/CT) is a reliable assessment before RE to ensure ...

Lung scans with the use of macroaggregated human serum albumin labelled with technetium-99m were carried out in 52 patients before thoracotomy.Forty-three patients had carcinoma of the bronchus. Tumours less than 2 cm. in diameter on the chest radiograph were not detected. Larger tumours showed defects in perfusion, ranging in size from the mass seen on the chest radiograph to almost absent per...

A 22-year-old woman presented with acute left-sided pleuritic chest pain and dyspnea 6 days after surgery for revision of the stenotic central aortopulmonary shunt. She had a history of tetralogy of Fallot (TOF), pulmonary valve stenosis, ventricular septal defect and major aortopulmonary collateral artery. Her Waterston shunt was placed when she was 5 years old and stented and re-dilated after...

A 52yearold woman with endstage renal disease for chronic glomerulonephritis was started on inpatient peritoneal dialysis (PD). We increased infusion volume of PD exchange every 2 days without observing any symptoms, including respiratory symptoms. After changing infusion volume on the 5th day, the patient complained of dyspnea and continuous cough. Decreased breath sounds were noted in the rig...

A 56-y-old woman with a history of non–small cell lung cancer presented with a persistent left pneumothorax and a left bronchopleural fistula after bronchial balloon occlusion. A ventilation–perfusion scan using 133Xe and 99mTc-macroaggregated albumin (MAA) was requested to evaluate for possible lung reduction surgery. With 428.46 MBq (11.58 mCi) of 133Xe gas, ventilation images were acquired i...

A 45-yearold man with dyspnea was referred for lung perfusion scan. Extrapulmonary uptake of Tc-99m macroaggregated albumin (MAA) was noted in a small area of the liver and in the thoracic vertebrae (fig. 1); the findings were not seen in a repeated lung scan after administration of the tracer through a peripheral vein in the foot (fig. 2). Subsequent computed tomography of the thorax revealed ...

Woodworkers in the furniture industry are exposed to wood dust in their workplaces. The aim of this study is to investigate the effect of occupational wood dust exposure on the nasal mucociliary transport rates (NMTRs) in woodworkers. Twenty five woodworkers and 30 healthy controls were included in this study. Wood dust concentration in workplaces was measured using the sampling device. (99m) T...