MTMI MAMMO PHYSICS KAHOOT

what is the avg kvp range of mammo?

a) 110-130

b)50-65

c)25-35

d)75-90

C

what is the interface material of mammo linear grids?

a) carbon

b)cesium

c)copper

d)air

A

in full field digital mammography, what determines which light field will be chosen to use with each patient?

a) the target filter combo chosen

b) amount of compression exerted on the breast

c) mammo tech chooses

d)size of the compression paddle chosen

D

What 2 imaging factors are grids used to control?

a) scatter and dose

b) scatter and contrast

c) scatter and resolution

d)contrast and dose

B

mammo grids absorb what percentage of scatter?

a) 50-60%

b)75-85%

c)90-95%

d)25-30%

B

What is the grid ratio used in mammography?

a) 8:1-10:1

b)10:1-12:1

c) 5:1-8:1

d)3:1-5:1

D

What 2 types of grids are used in mammography?

a) honeycomb and HTC

b)focused and HPC

c)linear and honeycomb

d)linear and focused

C

which principle has to do with the actual focal spot and the effective focal spot?

a) half value layer

b) heel effect

c)half field geometry

d)line focus principle

D

what focal spot size is used for standard mammo imaging?

a) .3mm

b).4mm

c).1mm

d).2mm

A

which statement is true regarding magnification in mammo?

a) grids are used to decrease scatter

b)dose to the breast is unchanged

c)dose is decreased to the breast

d)grids are not used in magnification

D

what material is used in the xray tubes window to allow photons to pass thru

a) glass

b)selenium

c)berylium

d)cesium

C

what causes the heel effect?

a) angling of the anode

b)size of cathode

c)kvp selected

d)resulting mAs

A

what is one of the roles of filtration in mammo?

a)removes high energy photons which decreases resolution

b)removes high energy photons which increases contrast too much

c) removes high energy photons which decreases contrast

d)removes soft photons which increase contrast and imporve detail

C

what is the typical SID in mammo?

a) 35-36 cm

b)55-56 cm

c)65-66cm

d)75-76 cm

C

what is the max allowable dose per view in mammo?

a) .003 mGy

b)300 mrad

c)3 mrad

d)300 mGy

B

what is used in mammo to assure radiation does not enter the lung field?

a) half field geometry

b) the tube is turned 90 degrees

c)line focus principle

d)heel effect

A

What size focal spot is used with magnification?

a) .1 mm

b) .2 mm

c) .3 mm

d) .4 mm

A

Which target filter combination might be used for a larger than average, but not extremely dense, breast?

a) Rh/ Mo

b) Rh/Rh

c) Mo/Rh

d)Mo/Mo

C

which of the following target filter combos would never be used in mammo?

a) Rh/Mo

b)W/ Ag

c)Mo/Rh

d) W/ Al

A

what is the characteristic radiation range produced by a molybdenum target?

a) 59-68 kvp

b)17-19 kvp

c)19-21 kvp

d)20-23 vkp

B

what 3 factors determine the mammo xray spectrum?

a) anode, cathode, window material

b)anode, kev, cathode

c)kev, filter, kv

d)kv, anode, filter material

D

Rhodium produces characteristic radiation in what kev range?

a) 20-23 kev

b) 22-25 kev

c)27-30 kev

d)30-32 kev

A

all mammo machines are created to produce what?

a) medium contrast images

b)low contrast images w high dose

c) medium dose levels with no concern of contrast

d) high contrast image sat low pt dose

D