Nuclear Med and PET

Question 1

Each atom consists of which 3 basic components

Answer 1

electrons, neutrons, protons

Question 2

Electrons are _ in radiography

Answer 2

manipulated

Question 3

Most atoms are

Answer 3

stable

Question 4

_ determine characteristics of an element

Answer 4

Protons

Question 5

Having excess neutrons may make isotopes _

Answer 5

radioactive

Question 6

Atoms in abnormally excited state characterized by unstable nucleus

Answer 6

radioactivity

Question 7

Radioactive disintegration or radioactive decay

Answer 7

to reach stability, radioactive atoms will emit particles and energy to transform themselves into other atoms

Question 8

Scintigraphy

Answer 8

a technique in which a scintillation counter or similar detector is used with a radioactive tracer to obtain an image of a bodily organ or a record of its functioning

Question 9

iodine-131 and technetium-99m treats

Answer 9

hyperthyroidism in cats

Question 10

The amount of radioisotope used for each exam is measured in

Answer 10

millicurie (mCi)

Question 11

Indications for imaging w/ nuclear medicine

Answer 11

sublte, severe, or multifocal lameness in horses, monitoring healing process of fractures, repurchase exams

Question 12

True/False: horses must be anesthetized for nuclear scanning

Answer 12

false

Question 13

Certain areas in young horses like growth plates should be

Answer 13

highly active

Question 14

Nuclear med studies are often used to demonstrate

Answer 14

subchondral joint disease

Question 15

_ is essential in using nuclear med to dx

Answer 15

comparison

Question 16

Horses are typically kept in iso stall for _ hours

Answer 16

48

Question 17

what must be posted outside of the stall

Answer 17

signage indicating radioactivity including perimeter barriers

Question 18

Once the horse is injected with the isotope, its body and its waste products are

Answer 18

radioactive

Question 19

Radioactive waste products must be retained in

Answer 19

a lead line container in the designated area for 48 hours and staff must be wearing PPE

Question 20

When should the scan room and camera be scanned with a survey dosimeter

Answer 20

before each exam to ensure no contamination

Question 21

PET scans use the injection of a _ that emits gamma rays with a scanning unit that consists of a series of scintillating sensors

Answer 21

radioisotope

Question 22

The most common isotope is _ and its used for mapping of both brain function and malignant tumors

Answer 22

fludeoxyglucose

Question 23

_ isotopes are commonly used for heart imaging

Answer 23

Ammonia

Question 24

Slice data collected from pet scanners tend to be high in

Answer 24

resolution- much more accurate than a similar nuclear medicine scan

Question 25

PET/CT studies start with the injection of the isotope about _ minutes before moving the patient onto the scanner

Answer 25

45

Question 26

The PET study can take - minutes depending on the anatomy being scanned

Answer 26

20-40

Question 27

What is the best modality to show soft tissues

Answer 27

MRI

Question 27

_ _ machines are able to provide both MRI and PET scans in the same examination

Answer 27

Modern Hybrid