Question

Which technique seems to offer several advantages like light reproducibility and sensitivity?

(a) NMR

(b) Laser Doppler

(c) Electromagnetic

(d) Ultrasonic

I have been asked this question in examination.

This intriguing question originated from PACS (Picture Archiving and Communication System) in division Telemedicine Technology of Biomedical Instrumentation

Answer 1

Right answer is (b) Laser Doppler

To explain: Laser Doppler flowmetry is a non-invasive technique and seems to offer several advantages like light reproducibility and sensitivity. However, its disadvantages like poor selectivity, baseline instability and restriction in a site of measurement are still limiting factors in its successful clinical utilization.