Question

Frequencies used in transthoracic imaging are usually in the range of ____________. Frequencies used in transesophageal imaging are usually in the range of ______________.

A) 3-6 MHz;6-8 MHz
B) 3-6 MHz; 5-7 MHz
C) 2.5-4 MHz; 5-7 MHz
D) 1-3 MHz; 6-8 MHz

Answer 1

The correct answer is C) 2.5-4 MHz for transthoracic imaging and 5-7 MHz for transesophageal imaging, which allows for detailed images of the heart with varying penetration depths and resolutions compared to techniques like MRI.

Step-by-step explanation:

Frequencies used in transthoracic imaging are usually in the range of 2.5-4 MHz. Frequencies used in transesophageal imaging are usually in the range of 5-7 MHz. Therefore, the correct answer to your question is C) 2.5-4 MHz; 5-7 MHz.

Transthoracic echocardiography is a type of medical imaging that uses high-frequency sound waves to create images of the heart from outside the body. Conversely, transesophageal echocardiography involves a probe with a transducer being placed into the esophagus, which is closer to the heart and allows for higher-frequency ultrasound use, resulting in better image resolution.

The frequencies used in these medical imaging techniques are much lower than the frequencies used in other imaging methods such as magnetic resonance imaging (MRI), which typically uses radio waves in the order of 100 MHz. This difference in frequencies is related to the penetration depth and resolution required in the specific imaging technique.