It is difficult to diagnose @entity1462 . When conventional CT (plain _ contrast enhancement) can not demonstrate the lesions, it was impossible to diagnose in the past. We developed a new technique which enabled us to diagnose them. Materials and methods; Seven cases of spontaneous @entity1779 , in which no abnormality was detected by repeated magnified serial angiography with subtraction technique and prolonged injection technique, were examined. In each case, conventional CT (plain _ enhancement using 100 ml of 60% @entity33250 ) was performed first, which was immediately followed by the administration of 220 ml of 30% @entity33250 for one hour. CT is taken at the end of the infusion. It, we call, is prolonged high dose delayed contrast CT: PHDD-CT. Total dose of @entity1496 used in this technique was 59.22 gI (1.0 gI/kg body weight: BW). Results; Contrast enhancement effect of PHDD-CT was much better than that of conventional CT in all the cases. In three cases, the lesions were more clearly delineated in PHDD-CT. In four cases, only PHDD-CT could demonstrate the lesions. No side effect was observed. Comments; Several techniques for better enhancement have been reported, however they used large volume of contrast medium such as 1.5 or 2.0 gI/kg BW. Our technique can be performed with more security. Based on our good results, we recommend to use this PHDD-CT technique for the diagnosis of @entity1462 .

[The usefulness of prolonged high dose delayed contrast computed tomography for the diagnosis of intracranial XXXX ].

@entity33250 :: ('MESH:D007482', 'Chemical') :: ['meglumine iothalamate'] @entity1496 :: ('MESH:D007455', 'Chemical') :: ['iodine'] @entity1779 :: ('MESH:D002543', 'Disease') :: ['intracerebral hemorrhage'] @entity1462 :: ('MESH:D054079', 'Disease') :: ['angiographically occult vascular malformations']
@entity1462 :: (MESH:D054079,Disease) :: ['angiographically occult vascular malformations']
