Instrumentation and Techniques — MCQs

Which of the following structures is LEAST suitable for ultrasound visualization?

Pulse echo principle is used by which modality?

'Triphasic waveform' on colour Doppler is of

All of the following modalities can be used for in situ ablation of liver secondaries, except:

About diagnosing air embolism with transesophageal echocardiography, which of the following is false?

The recommended Doppler angle for accurate velocity measurement in Doppler ultrasound is

Which is not echogenic while doing ultrasonography:

A 45-year-old female presents with a 2 cm thyroid nodule. Which TIRADS category has >95% risk of malignancy?

Why does the needle appear as a hyperechoic structure when inserted at approximately 60 degrees to the ultrasound beam?

What is an absolute contraindication for transvaginal sonography?