Quiz # 1 Clinical Considerations

Question 1

Radiography/X-Rays

Answer 1

High energy radiation that can penetrate living tissues. Creates an image with radio dense tissues such as bone appearing white, and less dense tissues appearing in shades of grey or black

Question 2

CT/CAT Scan

Answer 2

Computerized Axial Tomography - an imaging technique that reconstructs the human three-dimensional structure of the body

Question 3

MRI

Answer 3

Magnetic Resonance Imaging - An imaging technique that employs a magnetic field and radio waves to portray subtle structural differences.

Question 4

MRI Procedure

Answer 4

1) High energy magnetic field 2) Protons arrange with field to create image

Question 5

MRI Advantage

Answer 5

1) Relatively Safe 2) Good to see tissues

Question 6

MRI Disadvantage

Answer 6

1) Long time 2) Poor visibility of bones 3) Can’t use if patient has metal implant

Question 7

MRI Diagnostic capabilities

Answer 7

1) Tumors 2) Musculoskeletal and organ observation (tissues) 3) Blood flow 4) Brain abnormalities

Question 8

CT Scan Procedure

Answer 8

Special type of X-ray; multiple x-rays traveling multiple directions at different angles; creates cross-sectional slices

Question 9

CT Scan ADV

Answer 9

1) Fast (30s -5 min) 2) Less sensitive to movement 3) Metal friendly 4) relatively cheap and available

Question 10

CT scan disadvantage

Answer 10

1) High radiation (Pregnant and children should stay away) 2) Less capable for tissue imagining compared to MRI

Question 11

How are X-rays and CT scans different?

Answer 11

X-rays use one ray CT scans use multiple rays

Question 12

CT Scan diagnostic capability

Answer 12

bone injury, lung/chest injury, Cancer, Traumatic brain injury

Question 13

X-ray Advantages

Answer 13

1) inexpensive 2) Cheap 3) Simple to perform

Question 14

X-ray diagnostic capability

Answer 14

1) mammography 2) Bone Density (Densitometry)

Question 15

What is contrast medium used for?

Answer 15

Contrast medium is used in X-rays to make hollow or fluid filled structures visible in radiographs; structures that have contrast appear white

Question 16

Constrast X-ray diagnostic capabilities

Answer 16

1) Angiography 2) Intravenous urography 3) Barium contrast X-ray (G.I tract)

Question 17

Ultrasound definition and procedure

Answer 17

High frequency sound waves reflect off body tissues and are received by the same instrument.

Question 18

Ultrasound adv

Answer 18

1) Safe 2) Non-invaisive 3) No dyes

Question 19

Doppler ultrasound

Answer 19

observes size, location, and actions of organs and blood flow through blood vessels

Question 20

PET Scan Definition and Procedure

Answer 20

Substance emits positrons (positively charged particles) into the tissue which receives it. Positrons interact with electrons in tissues producing gamma rays. Gamma rays are absorbed by gamma ray cameras forming a PET scan.

Question 21

PET Scan order of increasing activity

Answer 21

Blue & Black (Minimal), Red, orange, yellow, white`

Question 22

PET Scan diagnostic capabilities

Answer 22

Used to study the physiology of structures, such as metabolism in the heart.

Question 23

Endoscopy Procedure

Answer 23

Visual examination of the inside body (organ or cavity) using an endoscope

Question 24

Colonoscopy

Answer 24

examines interior of the colon

Question 25

Laparoscopy

Answer 25

used to examine the organs within the abdominopelvic cavity

Question 26

Arthroscopy

Answer 26

Used to examine the interior of a joint usually the knee