Engineering and Technology Set 1

Question 1

What is imaging technology?

Answer 1

Imaging technology involves using various materials and types of technologies to ceate images.

Question 2

What does image mean?

Answer 2

Image is Latin for picture or likeness.

Question 3

What is another word for a permanent image?

Answer 3

A fixed image or a hard copy is a permanent image.

Question 4

What is radiography?

Answer 4

Radiography is the creation of images using xray.

Question 5

What is the ‘real’ word for xrays?

Answer 5

radiographic images are xrays

Question 6

What is a Medical Radiation Technologist (MRT)

Answer 6

an MRT is a professional who creates radiographic images.

Question 7

What is the most common form of radiographic image?

Answer 7

xray is the most common form of radiographic images

Question 8

What are fluoroscopic images?

Answer 8

Fluoroscopic images are moving image (ultrasound)

Question 9

What are tomographic images?

Answer 9

Tomographic images are slices of the body ( CT Scan)

Question 10

What do MRTs need to understand?

Answer 10

MRTs study human anatomy and physiology, especially osteology – bones

Question 11

Why do they have to study physics and chemistry?

Answer 11

They study physics and chemistry to understand how the images are created.

Question 12

What four things to MRTs learn.

Answer 12

MRTs have to learn how the xray is produced, how the xray beam is changes when it gets to bone or organs, how the image is captured by the machine, and how the image is stored

Question 13

What did Wilhelm Conrad Roentgen discover?

Answer 13

Wilhelm Conrad Roentgen discovered xrays. He was a German physicist

Question 14

When were xrays discovered?

Answer 14

xrays were discovered November 8, 1895

Question 15

What is a cathode ray tube?

Answer 15

A cathode ray tube is a sealed tube with all the air removed, at one end is an electron gun, and the other end has a screen to view images

Question 16

What did Roentgen discover about the tubes?

Answer 16

Roentgen discovered that if he used a chemical barium platinocyanide it glowed (floresce)

Question 17

What is x-radiation?

Answer 17

X-radiation was a new type of electromagnetic radiation

Question 18

Why did he use the x?

Answer 18

He used the x because he didn’t know what it was that he found, and x is used in math for the unknown number

Question 19

What did Roentgen win?

Answer 19

Roentgen won the first ever Nobel Prize for physics.

Question 20

Why was it an amazing discovery?

Answer 20

Roentgen found that he could send radiation through a body and that a picture would be made on film, and that the radiation passed through different parts – soft vs hard, differently so you could see inside the body.

Question 21

What is the unit for measuring exposure to xrays?

Answer 21

R (roentgen) is the name of the measurement for xray radiation exposure.

Question 22

Why do bones and metal look white in an xray?

Answer 22

Bones and metal absorb more of the radiation, but the radiation passes through the soft parts

Question 23

What element in bones absorbs radiation?

Answer 23

Calcium in bones absorbs radiation

Question 24

What is the difference between a negative image and a positive image?

Answer 24

A negative image is the one on the film strip that the dr holds up to the light, but the positive image is the image that has been printed onto paper.

Question 25

What are xrays used for?

Answer 25

Xrays are used for diagnosing broken bones, breast cancer (mamography), airport security

Question 26

What is a non-destructive use of xrays?

Answer 26

They use xrays to check for cracks in pipes or airplane parts without having to take apart the item.

Question 27

What are the benefits of xrays?

Answer 27

xrays can show gallstones in the gallbladder, kidney stones (crystals) in the kidneys, cancer tumors, or even keys that have been swallowed.

Question 28

What are the problems with xrays?

Answer 28

Xrays have a form of ionizing radiation and they can increase the risk of cancer, most xrays give very little radiation, but you still protect yourself with a heavy blanket when getting one.

Question 29

What is the short name for xray computed tomography?

Answer 29

CT Scan

Question 30

How is a CT different than an xray?

Answer 30

A computer takes the xray and creates slices of tissue pictures.

Question 31

What does tomography mean?

Answer 31

Tomography means tomo-slice and graphy – write, so writing with slices

Question 32

Who invented CT Scans?

Answer 32

Sir Godfrey Hounsfild and Allan McLeod Cormack invented CT Scans

Question 33

When were CT scans invented?

Answer 33

CT scans were invented in 1967

Question 34

How did Hounsfield come up with the idea of slices of xrays?

Answer 34

He thought that if you xrayed what was inside a box from a bunch of angles that you could get an idea of what was inside the box

Question 35

How did Hounsfield test their idea?

Answer 35

He tested the first CT Scanning machine with a dead brain, then a fresh cow's brain, then later on his own brain

Question 36

Why did both Hounsfield and Cormack get the nobel prize in Medicine in 1979?

Answer 36

They were both working on the same idea and did not know it, but Cormack was more mathematical invention for the device.

Question 37

When and where was the CT Scanner first used?

Answer 37

The CT Scanner was first used in England on October 1, 1971

Question 38

How does a CT Scanner work?

Answer 38

A CT Scanner works by rotating an xray tube around a body part taking many images that are processed by a computer

Question 39

What was the name of the original process of a CT Scan?

Answer 39

Computed Axial Tomography, so they were called CAT Scans but now we just say CT scan

Question 40

Where did the word Axial come into the name?

Answer 40

The images are taken along the axis of the body, or the length of the body

Question 41

Why are CT scans helpful?

Answer 41

CT Scans create 3D images of body parts and can be rotated to see different directions.

Question 42

What is a pathology?

Answer 42

A pathology is an abnormality or injury

Question 43

Why are CT scans used on the brain a lot?

Answer 43

The skull blocks the brain from being xrayed normally, but a CT scan can see into the brain.

Question 44

How do CT scans compare to xrays?

Answer 44

A CT machine can vary the intensity of the radiation, but because there are so many slices taken you get more radiation