title: Mathematical analysis (fast Fourier transform) of the ultrasonic echo pulsation curve in brain diseases.
abstract: The ultrasonic pulsation curve can be analysed by the computer. This technique has been useful for measuring haemodynamics. We detected prodromal signs of rebleeding from an intracranial aneurysm.
mesh_terms: D000293:Adolescent; D000328:Adult; D001927:Brain Diseases / Q000175:diagnosis* / Q000503:physiopathology; D002560:Cerebrovascular Circulation; D002648:Child; D002675:Child, Preschool; D005583:Fourier Analysis; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis; D008875:Middle Aged; D010991:Plethysmography / Q000379:methods*; D014463:Ultrasonography