[Measurement volume of intracranial hematoma by computed tomography (author's transl)].

On hypertensive intracranial hematoma, the hematoma volume on CT scan was measured by Delta scan 50 with MAP-program. 1) In each slice of the hematoma, high density mass lesion, the area was measured by joy stick on viewing console, and relationship with print out data, area above 40 CT values was good. 2) Correction of partial volume effect, especially of high of hematoma in the 10 mm scan slice was done with each mean CT values of the hematoma, and central CT values of that. For correction of partial volume effect, hematoma volume was decreased compared with the volume measured by MAP area measurement only, but in phantom study, corrective hematoma volume has shown high accuracy. 3) In comparison of corrective hematoma volume with maximum length of hematoma, line measurement does not evaluate of hematoma volume proportionaly as large. Though calculated volume by modified Dodge's formula (pi/6 X L X S X slice) has shown good relationship with corrective hematoma volume. Then, in clinical use, measurement of 3 line distance, maximum length, crossed short length, slice thickness contained hematoma was recommended to evaluate actual hematoma volume.