Question

to be computer literate means to be able to correctly use many sophisticated computer programs and applications. true false question 17 (1 point) the diagnostic technique that takes x - rays from various angles to measure the density of tissue in cross - sectional views is called magnetic resonance imaging (mri) computed tomography (ct) ultrasonography positron emission tomography (pet) question 18 (1 point) the technique that uses a radioactive substance that is injected into the patient and detected by a scanner, resulting in three - dimensional images. positron emission tomography pet) magnetic resonance imaging (mri) computed tomography (ct) electrical impedance tomography (eit)

Explanation:

• Question 17: Computed tomography (CT) uses X - rays from different angles to create cross - sectional images of tissue density. Magnetic resonance imaging (MRI) uses magnetic fields and radio waves. Ultrasonography uses high - frequency sound waves. Positron emission tomography (PET) uses radioactive tracers but not in the way described for measuring tissue density via X - rays from angles.
• Question 18: Positron emission tomography (PET) involves injecting a radioactive substance (tracer) into the patient. The scanner detects the emissions from the tracer to create three - dimensional images. Magnetic resonance imaging (MRI) does not use radioactive substances in this way. Computed tomography (CT) mainly uses X - rays (not radioactive substances injected and detected as described). Electrical impedance tomography (EIT) measures electrical impedance, not using radioactive substances for imaging as in the question.

Answer:

• Question 17: Computed tomography (CT)
• Question 18: Positron emission tomography (PET)