A nebulizer is used to administer which of the following lung ventilation radiopharmaceuticals?

The use of a nebulizer in lung ventilation studies is specifically associated with the administration of 99mTc pentetate. This radiopharmaceutical is often aerosolized, allowing it to be inhaled directly into the lungs. The nebulization process creates a mist that is easily inhaled, enabling proper distribution of the radiopharmaceutical throughout the lung tissue, which is critical for assessing lung function and ventilation.

99mTc pentetate is used in ventilation imaging as it provides clear imaging results by highlighting areas of lung ventilation. The ability to use a nebulizer makes this process effective because the aerosolized particles can reach the alveolar level, allowing for detailed imaging of lung function.

The other radiopharmaceuticals mentioned have different administration routes and uses. For example, 81mKr gas and 133Xe gas are designed for inhalation but do not typically utilize a nebulizer, as they are administered in gaseous forms. On the other hand, 99mTc macroaggregated albumin (MAA) is used for perfusion imaging rather than ventilation and is injected intravenously, typically not involving inhalation or nebulization. Therefore, the correct answer is indeed 99mTc pentetate, as it is the radiopharmaceutical