Medical Imaging

On an Xray and CT scan, whiter shades are

• more dense (harder)

• less dense (softer)

Tags

NGSS.HS-PS4-5

This image was produced by

• CT

• MRI

• fMRI

• PET

Tags

NGSS.HS-PS4-3

Noninvasive technique that produces images of internal soft tissues through the use of magnets and radio waves

• MRI

• X-ray

• CT scan

• Bone scan

Tags

NGSS.HS-PS4-3

In order to improve x-ray image quality and to minimise the radiation dosage...

• Keep the x ray source close to the patient.
  Have a lead grid to absorb scattered rays.
  Put the detection plate as close to the patient as possible.

• Keep the x ray source far away from the patient.
  Have a lead grid to absorb as many x rays as possible.
  Put the detection plate as close to the patient as possible.

• Keep the x ray source close to the patient.
  Have a lead grid to absorb as many x rays as possible.
  Put the detection plate as close to the patient as possible.

• Keep the x ray source far away from the patient.
  Have a lead grid to absorb scattered rays.
  Put the detection plate as close to the patient as possible.

As an ultrasound pulse moves through tissue in a patient's body it will not undergo a change in

• Frequency

• Amplitude

• Phase

• Wavelength

Tags

NGSS.HS-PS4-5

NGSS.HS-PS4-1

Which of the following electronic component is used in ultrasound

• Quartz crystal

• Amplifier

• Transducer

• Transformer

Tags

NGSS.HS-PS4-5

Ultrasound belongs to which classification of medical equipments

• Therapeutic

• Diagnostic

• Surgical

• Laboratory

The purpose of the coupling gel is to

• Eliminate reflection at the skin's surface due to air

• Increase the impedance between the skin and transducer

• Decrease the wavelength of sound so that it will be transmitted better into the body

• All of the above

Tags

NGSS.HS-PS4-1

The PET scanner detects at least three pairs of gamma rays to locate a tumour. This is called...

• detection

• triangulation

• echolocation

• annihilation

Tags

NGSS.HS-PS4-5

Isotopes used in PET scanning must have a...

• short half-life

• long half-life