Imaging Breast and Posterior

Created by gallel1 

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breast

lie between 2nd rib superiorly and 6th rib inferiorly, sternum is medial border, midaxilla lateral border; teardrop shaped, upper outer portion (tail of Spence) extends into axilla; treated with tangential fields; upper outer, upper inner, lower outer, lower inner quadrants

supraclavicular fossa (SCF)

indentation immediately above clavicle; may not be included in breast treatment

tangential field

skims breast from two opposing angles, with flash off the surface of px; approx 1 cm of lung in field (tolerance); sup border 2nd costal space, inf border 2cm below breast tissue; tail of Spence included; medial and lateral

tail of Spence

upper outer portion of breast; upper outer quadrant, where most breast cancers are located

clavicle

2/3 included in SCF for breast cancer treatment

pectoralis major

medially attached to clavicle and superior five costal cartilages; passes laterally to axilla; inferior border not visible in females, covered by breast

pectoralis minor

thin, triangular muscle, situated at the upper part of the chest, beneath the pectoralis major; attached to the 3-5th ribs near the costal cartilage

flash

radiated area beyond field, included in tx to ensure complete tumor coverage; extends past skin surface; brain, breast, vocal cords; 1-2 cm

scapula

large posterior bone associate with pectoral girdle, palpable on back; spine at T3, inferior angle T7

trapezius

flat triangular muscle, lateral angles at shoulders, superior angle at external occipital protuberance (EOP); inferior angle @ T12

teres major

band of muscle between inferior angle of scapula and humerus, forms posterior wall of axilla

latissimus dorsi

broad muscle on either side of the back, spans from iliac crest of pelvic bones to posterior axilla

subarachnoid space

L4/L5 location of lumbar puncture

iliac crest (posterior)

superior outer margin of hip bone; at level of L4; used to locate lumbar puncture

posterosuperior iliac spine (PSIS)

posterior end of the iliac crest; palpable 5 cm from midline, at level of S2

liac crest (anterior)

superior outer margin of hip bone; at level of L4; used to locate lumbar puncture

posterosuperior iliac crest

posterior end of the iliac crest; palpable 5 cm from midline, at level of S2

obturator foramen

large opening in ischium and pubis of pelvis; used in prostate setup

pubic symphysis

joint formed by bodies of two pubic bones joined by fibrocartilage disc; used in prostate setup

ischial tuberosity

interior surface of ischial body, posterior pelvis; weight borne by this while sitting; used in prostate setup

pelvic brim

continuous oval ridge that runs from pubic crest through arcuate line and sacral promontory of pelvis; superior margin of true pelvis; used in prostate setup

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