X-ray

What is the main purpose of the metal target in an X-ray tube?

• To focus the X-ray beam onto the image receptor

• To absorb low-energy X-rays that reduce image quality

• To convert high-speed electrons into X-rays upon impact

• To regulate the electron flow between the cathode and anode

Why does soft tissue appear darker than bone on a typical X-ray image?

• Soft tissue reflects most of the X-rays that hit it

• Bone transmits X-rays more effectively than soft tissue

• Soft tissue attenuates fewer X-rays, so more reach the detector

• Bone has a lower density, so it casts a lighter shadow

What is the main function of image intensifiers in medical imaging?

• To magnify small features in the image electronically

• To enhance the brightness of X-ray images while minimizing radiation dose

• To generate 3D reconstructions directly from single 2D scans

• To control the timing of X-ray pulses for clearer images

In computed tomography (CT), how is a 3D image constructed?

• By merging images from different types of scans like MRI and X-ray

• By moving the patient bed while taking a single X-ray image

• By combining multiple 2D X-ray cross-sections taken from various angles

• By using a single detector to measure changes in radiation intensity over time

If Ms. Sofia Tan had a denser-than-normal skull, how might that affect her CT scan?

• The image would appear too dark due to excessive X-ray transmission.

• The skull would reflect X-rays, making it appear blurred.

• The denser bone would absorb more X-rays, possibly reducing brain visibility.

• The CT scanner would switch to a lower energy setting to penetrate the skull.