Abstract
In the past two years we heve performed 100 cisterno grams covering 90 patients using 169Yb-DTPA as the radiopharmaceutical at the Department of Radiology, Mitsui Memorial Hospital.
The diagnoses of these cases were summarized in Table 1.
169Yb-DTPA was usually introduced into the lumbar intrathecal region and from the point the serial scintigams were followed from the spinal canal to the parasagittal areas ranging from 30 minutes, 1, 3, 6 and 24 hours after the administration. In some cases 48 and 72 hour scintigrams were supplemented.
The scintigrams were made by Toshiba Universal dual scanner and scinticamera. From the results we summarized our experiences with the interpretations of the cisternograms with special reference to normal anatomy which must be studied as the fundamentals for the reading of the abnormal cisterno grams under the pathologic conditions.
169Yb-DTPA cisterno gram could be scintigraphically divided into the following regions; C. magna, basal cisterns, C. fossae sylvii, C. quadrigemina, lateral ventricles and finally convexities and parasagittal areas.
The characteristics of the shapes of these cisterns and lateral ventricles were discussed. The appearance time of the radiopharmaceutical now available, i.e., 131I-HSA, 169Yb-DTPA in the adults and 99mTc-HSA in the children into each cistern were also discussed.
