Surgery – Truss – Pad
Patent
1987-02-06
1988-01-12
Kamm, William E.
Surgery
Truss
Pad
128659, 128719, 250303, A61B 600
Patent
active
047184329
ABSTRACT:
In a CT imaging apparatus, tracer gas such as Xenon is drawn via a pipe into a patient in synchronism with X-ray tomographic data acquisition. The tracer gas inhalation is controlled by a data acquisition controller through a valve driver. The tracer gas concentrations in the local cerebral tissue and air expired from the patient are measured in the image analysis device. The first-mentioned tracer gas concentration is measured before its saturation in the patient. The partition coefficients of the local cerebral portions are calculated in the calculation device from the ratio of the first area to the second area. The first area is defined by the first curve representing the tracer gas concentration of the local cerebral tissue, while the second area is defined by the second curve representing the tracer gas concentration of the air expired by the patient.
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Kimura Tokunori
Kobayashi Naotoshi
Kabushiki Kaisha Toshiba
Kamm William E.
Smith Ruth S.
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