brain imaging technologies

Question 1

PET SCAN Definition

Answer 1

it is a type of nuclear medicine imaging which includes the injection of radioactive dye mixed with glucose into the patient which produces measurable gamma rays as it is metabolised in the brain. it is presumed that more the metabolisation of sugar in a prticular region of the brain the greater the activity. the rays are detected and turns them into an image

Question 2

PET SCAN advantages

Answer 2

shows the brain in action as it fucntions, identify illnesses in early stage, SR- 4mm, TP- 30-40 sec

Question 3

PET SCAN disadvantages

Answer 3

pregnant women, diabetic patients cannot undergo

Question 4

MRI SCAN definition

Answer 4

hydrogen atoms emit energy when placed in an external magnetic field and when detected can be mapped based on their relative distribution to form a static image

Question 5

MRI SCAN use

Answer 5

detect brain abnormalities, tumors, infections, and bleeding

Question 6

MRI SCAN disadvantage

Answer 6

people with metal in their body, claustrophobic people, expensive and noisy

Question 7

MRI SCAN advantage

Answer 7

no exposure to radiation, effective resolution for the detection of abnormalities

Question 8

fMRI SCAN definition

Answer 8

brain imaging technology which shows the ongoing function as well as the structure. it uses the Blood oxygen level-dependent signal to form a picture

Question 9

fMRI SCAN advantages

Answer 9

good spatial resolution of 1-2 mm, allows to see function, no radiation

Question 10

fMRI SCAN disadvantages

Answer 10

temporal resolution of only 1 second