accessories used in rad therapy pp

what are positioning aids used for

to aid pt comfort

are positioning aids customized

no

t/f: are positioning aids fairly inexpensive

true

what are some common positioning aids

ring, prone pillow, knee sponges, head rest, prone base plate, wing board

how does the wing board move

in/out, up/down

why do we have positioning aids for breast ports

because with the skin, it can break down from sweat, bras, moisture

why is there an angle on some breast boards

so the breast falls anteriorly

what is a prone breast board

makes breast fall down

what is pt immobilization

used to achieve true reproducibility and accuracy of set up

in a large study, what percent of pts had field error placements occure

15%

what were the most common sites of error

pelvis, chest, and abdomen

what did a study show that added greatly diminished daily setup variation

adding immobilization devices

what does immobilization devices help do

prove reproducibility

give some more reasons that immobilization devices are effective

gives pt minimum discomfort, achieve the conditions prescribed in tx plan, enhance precision with minimal additional set up time, are durable to withstand an entire course of tx

what is a frame called that a mask locks into

s-frame

what are some examples of immobilization devices

head and neck mask, belly board, vacuum bags, breast immobilization with thermoplstic, foaming agents, typical breast boards, body fix

how many therapist does it take to put on a full mask

2

what is a shoulder retractors used for

head and neck pts that brings shoulders down

what are thermoplastics used for

hold pts body in place for other body parts

what will prone belly board get lowered

small bowels

where is the hole in a prone belly board cut out of

above pubic bone

where do you try to keep vac bag storage

off the floor

what can you use for breast to immobilze

thermoplastic mask

brand name of foaming agents

alpha cradle

what immobilization is needed for a stereotactic body radiation therapy tx

full length vac bag

what is put on the full body vac bag

serand wrap

list out all the areas most likely to require immobilization

• head and neck cancers

• brain

• breast

• esophagus or lung

• pelvis

• diseases on extremities

• all sites in children

• difficult to reach cancers

pros of immobilization devices

reproducibility and pt comfort

cons of immobilization devices

time required by therapists, safety concerns, financial concerns

what devices are convenient and inexpensive

positioning aids

what devices range in cost

immobilization devices

what device is used often for many pts

positioning aids

what device is often constructed for use of only one pt

immobilization devices

what device has very little structure to insure that pt does not move

positioning aids

what is often focused on providing increased comfort for pt, not immobilization

positioning aids

what devices may be very costly

immobilization devices

what are 4 not common other accessories

lucite, calipers, bolus, eye shields

what two thickness of bolus is there

1cm thick or 0.5cm thick

what is localization accessories

penial clamp

what can be used to transfer pt onto a table from a bed

pt transfer board

what is another device used for pt transport

hovermatt or hoyer lift

why do you coat bolus in wax

to prevent excessive scatter

what does the wax do when you cover it

it interacts with beam just like our body does

what is another name for markers

fiducial

what does fiducial mean

accepted as a standard of comparison, measurement, or reference

what is an example of permanent fiducial markers

tattoos

what does natural anatomy mean

can be seen/felt

what are gold seeds/markers used for

for prostate; not radioactive; shows up on CT

what are tattoos

a positioning aid used to permanently identify tx portal

when are tattoos given to pts

in CT sim