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[CT/MRI correlated stereometry with ultrasound in brain surgery]
H J Zweifel1, H F Reinhardt, G A Horstmann
1Fachbereich Medizintechnik, Interstaatliche Ingenieurschule Neu-Technikum Buchs.
Ultraschall in Der Medizin (Stuttgart, Germany : 1980)
|April 1, 1990
Abstract:
Today the accuracy of medical imaging systems lies between +/- 0.5 mm (CT) and +/- 2.5 mm (MRI). In neurosurgery the overall uncertainty may reach the dimension centimetres. A non-tactile ultrasonic measurement system is described that allows three-dimensional measurement with a theoretical accuracy of +/- 0.1 mm in a frequency range between 50 and 70 kHz. In practice the accuracy is better than +/- 1 mm with a repetition rate of 10 per second for the x,y,z-data sets.