Problemas
What are two ways in which ultrasound technology produces images? A. By detecting the frequencies of emitted sound waves B. By using sound in frequencies that reflect off body tissues C. By measuring the time it takes for reflected sound waves to be detected D. By the absorption of sound waves in the body
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Respuesta
### B. By using sound in frequencies that reflect off body tissues### C. By measuring the time it takes for reflected sound waves to be detected
Explicación
## Step 1: Understanding Ultrasound Technology### Ultrasound technology uses sound waves to produce images of the inside of the body.## Step 2: Evaluating Option A### Option A suggests that ultrasound images are produced by detecting the frequencies of emitted sound waves. This is not correct. The frequencies of the sound waves emitted by the machine are known, and what is crucial is how these waves interact with the tissues and how they are reflected back.## Step 3: Evaluating Option B### Option B is correct. Ultrasound uses sound waves in frequencies that reflect off body tissues. Different tissues reflect sound waves differently, and this differential reflection is used to produce images.## Step 4: Evaluating Option C### Option C is also correct. The time it takes for the reflected sound waves to be detected (echo time) is crucial in determining the depth of the structure from which the sound was reflected. By analyzing the time it takes for the sound waves to return, the machine can determine how deep the sound-reflecting structure is located.## Step 5: Evaluating Option D### Option D is incorrect. Ultrasound images are not produced by the absorption of sound waves in the body. While some absorption does occur, it is the reflection of sound waves that is crucial for image production.