Estimation of Pulmonary Blood Flow by 131I-MAA Pulmogram with Special Reference to Pulmonary Carcinoma before and after Radiotherapy
- 1 January 1967
- journal article
- research article
- Published by Tohoku University Medical Press in The Tohoku Journal of Experimental Medicine
- Vol. 93 (1) , 79-91
- https://doi.org/10.1620/tjem.93.79
Abstract
The scintigram obtained on the lung with iodine-131 tagged macroaggregated albumin (131I-MAA) demonstrates the distribution of pulmonary blood flow. This technique is often utilized to estimate the relative amount of bilateral pulmonary blood flow on the basis of density appearing on the scintigram. The scintigram is usually affected by the factors of the scanner used. The relative amount of bilateral pulmonary blood flow was estimated by a specially designed slit-type collimator to obviate the above-mentioned disadvantages. According to this technique, the amount of blood flow is shown as a curve having 2 peaks corresponding to each lung. This method is not affected by the factors of the scanner and is very easy to perform. This was applied on cases of pulmonary carcinoma to investigate changes in pulmonary blood flow in connection with radiotherapy. In 5 out of 9 cases of hilar type there was a marked improvement in the pulmonary, blood supply. In peripheral type, however, no improvement was detected in all 4 cases.Keywords
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