Ultrasound Image Display With Additional Information Using PPG and ECG Signals
An embodiment for displaying an ultrasound image with additional information using a photoplenthysmography (PPG) signal and an electrocardiogram (ECG) signal in an ultrasound system is disclosed. The ultrasound system includes a photoplenthysmography (PPG) signal generating unit and an electrocardiogram (ECG) signal generating unit. The PPF signal generating unit and the ECG signal generating unit generate a PPG signal for the target object and an ECG signal for the target object, respectively. An additional information forming unit forms additional information by using the PPG signal and the ECG signal. A display unit displays ultrasound images of the target object together with the additional information.
1 . An ultrasound system, comprising:
a transmission/reception (Tx/Rx) unit operable to transmit ultrasound signals to a target object and receive echo signals reflected from the target object to thereby output receive signals;
an ultrasound image forming unit operable to form ultrasound images based on the receive signals;
a photoplenthysmography (PPG) signal generating unit operable to generate a PPG signal for the target object;
an electrocardiogram (ECG) signal generating unit operable to generate an ECG signal for the target object;
an additional information forming unit operable to form additional information by using the PPG signal and the ECG signal; and
a display unit for displaying the ultrasound images and the additional information.
2 . The ultrasound system of claim 1 , wherein the additional information include a PPG waveform, an ECG waveform and physiologic information.
3 . The ultrasound system of claim 2 , wherein the physiologic information include blood oxygen saturation, heart rate and blood pressure.
4 . The ultrasound system of claim 3 , wherein the additional information forming unit includes:
a PPG waveform forming section operable to form the PPG waveform by using the PPG signal;
an ECG waveform forming section operable to form the ECG waveform by using the ECG signal; and
a physiologic information forming section operable to form the physiologic information by using the PPG waveform and the ECG waveform.
5 . The ultrasound system of claim 4 , wherein the physiologic information forming section is configured to:
detect peak points and valley points on the PPG waveform and peak points on the ECG waveform;
compute a first pulse transit time representing an interval between the peak point of the PPG waveform and the peak point of the ECG waveform and a second pulse transit time representing an interval between the valley point of the PPG waveform and the peak point of the ECG waveform; and
form information on the blood pressure by using the first and second pulse transit times.