Diagnostic Methods

Question 1

Diagnostic Methods

Answer 1

Radiography (X-ray)
Computer (Axial) Tomography (CAT/CT)
Ultrasonography
Magnetic Resonance Imaging (MRI)
Nuclear Medicine Scanning
Positron Emission Tomography
Endoscopy

Question 2

Radiography (X-ray) *ionizing radiation

Answer 2

Electrons are shot through body at high speed. Dense areas create shadows/images.
Great for boney areas!

Question 3

Computer (Axial) Tomography (CAT/CT) *ionizing

Answer 3

Same premise as plain film radiograph except x-ray tube rotates around the body. Computer generates a 3D image

Question 4

Ultrasonography *non-ionizing

Answer 4

Ultrasonic waves are reflected off of internal structures to produce a sonogram (image)

Question 5

Magnetic Resonance Imaging (MRI) *non-ionizing

Answer 5

A scanning device with a magnetic field generates a radiofrequency (RFs) through tissue. Different tissues produce different RFs and a computer creates a 3D image from this data. Best for soft tissue!

Question 6

Positron Emission Tomorgraphy (PET) *ionizing

Answer 6

Positively charged particles are injected into body. They collide with negatively charged particles which emits Gamma radiation which can be detected by gamma cameras

Question 7

Nuclear Medicine Scanning *ionizing

Answer 7

A radionucleotiode that emits gamma radiation (radioactive substance) is injected into the body and then cells and tissues absorb it. A gamma camera scans, “reads,” and produces multiple images that a computer then compiles into an image with intense colours in areas of high activity (Ex SPECT)

Question 8

SPECT *ionizing

Answer 8

Single Photon Emission Computerized Tomography

Question 9

Endoscopy

Answer 9

Visual examination of an internal cavity or organ with a camera