Estimation of Pulmonary Blood Flow by ¹³¹I-MAA Pulmogram with Special Reference to Pulmonary Carcinoma before and after Radiotherapy

Abstract

The scintigram obtained on the lung with iodine-131 tagged macroaggregated albumin (131I-MAA) demonstrates the distribution of pulmonary blood flow. Therefore, this technique is often utilized to estimate the relative amount of bilateral pulmonary blood flow on the basis of density appearing on the scintigram.As is well known, however, the scintigram is usually affected by the factors of the scanner used.