Instead of sending out a single X-ray through the body as with ordinary x-ray, what does a CT scan do?

Several beams are sent at the same time from different angles.

It uses only sound waves to create images.

It only measures the temperature of the body.

It produces images using magnetic fields only.

What is the typical structure of a CT scanner?

Large, box like machine with a hole, or short tunnel in the center

What is the function of the examination table in a CT scanner?

To slide into and out of the tunnel, allowing the patient to lie on it during examination

The inverse square law as it applies to X-rays can be explained using the example provided in the image.

The intensity of X-rays decreases proportionally to the square of the distance from the source.

The intensity of X-rays increases as the distance from the source increases.

The intensity of X-rays remains constant regardless of distance from the source.

The intensity of X-rays is not affected by distance from the source.

What primarily determines the input X-ray spectrum before the X-rays pass through the patient?

The kVp (max Energy) and pre-patient filtration

What happens to the number of photons after passing through the patient?

The number of photons decreases.

The number of photons increases.

The number of photons remains the same.

When travelling through the body of the patient, which interactions of x-rays with matter take place?

A) Photoelectric and Compton interactions

It is important to consider carefully the patient radiation dose in each case because:

Excessive radiation can be harmful to the patient.

It always improves image quality.

It reduces the need for medical staff.

It guarantees a faster recovery.

Why may straps and pillows be used during a medical imaging exam?

To help maintain the correct position and to hold still during the exam

To make the patient comfortable

What is the purpose of using contrast material in X-ray imaging?

To help internal structures show up more clearly on the X-ray images

To make the patient feel better

What is the function of the detectors in a CT scanner?

To measure the amount of radiation being absorbed through the body.

To generate X-rays for imaging.

To move the patient through the scanner.

To reconstruct the final image from raw data.

Refer to the diagram showing the X-ray tube and detectors arranged in a ring around the patient. What is the purpose of this arrangement in CT scanning?

To allow the X-ray tube and detectors to rotate around the patient and measure the amount of radiation absorbed through the body from different angles.

To increase the brightness of the X-ray image for better visualization.

To reduce the amount of radiation required for a single scan by half.

To focus the X-rays on a single point for higher resolution images.

Refer to the diagram labeled 'CT scanner with the X ray source and detectors shown in three positions.' Which of the following statements is correct?

The X-ray source and detectors rotate around the patient while the examination table moves through the scanner.

The X-ray source and detectors remain stationary while the patient moves.

The patient rotates while the X-ray source and detectors remain stationary.

The X-ray beam does not move during the scan.

A CT scan produces multiple images or 'slices' because:

it takes images from different angles to create detailed cross-sectional views of the body.

it uses only a single X-ray image for diagnosis.

it is designed to show only the outer surface of organs.

it cannot differentiate between different tissues.

What is digital geometry processing used for?

To generate a three-dimensional volume of the inside of the object from a series of two-dimensional radiographic images taken around a single axis of rotation.

To create two-dimensional images from three-dimensional objects.

To process sound waves for medical imaging.

What is shown in the image labeled 'CT Control room'?

A technologist operating a computer workstation in a separate control room, monitoring a CT scanner and the examination.

A patient lying inside an MRI scanner.

A doctor performing surgery in an operating room.

A nurse administering medication in a hospital ward.