Which of the following describes the effect on the frame rate whenchanging from duplex to triplex imaging?A: increasedB: no change to the frame rate when color Doppler is activeC: no change to frame rate when PW Doppler is activeD: decreased
D
D: decreased
When changing from duplex to triplex imaging, the frame rate will typically decrease. This is because, in duplex mode, the ultrasound machine is transmitting and receiving two types of ultrasound (e.g. the B-mode image and the Doppler signal) during each scan line. However, in triplex mode, the machine is transmitting and receiving three types of ultrasound (e.g. the B-mode image, the Doppler signal, and the color-C mode image), which requires more time. Consequently, the frame rate may be slowed down to accommodate the additional processing time needed to acquire and display all three types of ultrasound data.
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