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Rad 112 unit 1
Rad 112 unit 1 mammo
Question | Answer |
---|---|
breast cancer | 2nd leading cause of death, 1 in 8 women diagnosed, 32% of cancer in women |
mammo recomendations | 50+ every year; 40-49 every 2 yr |
MQSA | mammography quality standards act; fed. legislation; 10/1/94 |
Breast extends from | T2-T7 |
Tail | axillary prolongation, extends from upper lat base |
apex | nipple |
base | post. surface overlies pectoralis major muscle |
coopers ligaments | support breast, extend from post fascia to skin |
Internal Anat | 15-20 lobes->Lobules(structured units)->alveoli->ducts (acini, draining ducts)->ampulla(dialated portion of duct)->nipple |
glandular tissue | include ducts, absorbs more radiation |
fibrous tissue | connective tissue, dense |
Fibroglandular tissue | most consistent throughout life, dense, little fat, 15-30 yo, childless women 30+, pregnant/lactating |
Fibrofatty tissue | avg. density, 50% fat 50% fibroglandular, 30-50 yo, women 3+ preg. |
Fatty Tissue | Min. density, 50+ yo, postmenopausal, atrophic, child and male breasts |
Tissue included when postitioning | inframammory fold to pectoralis muscle |
Low kvp | 25-30 |
MLO | mediolateral oblique |
CC | craniocaudal |
prominent heel effect | cathode close to base of breast |
FS size | .3-.1mm |
Filter | molybdenum rhodium target (momo) |
barylinium | material used instesd of glass |
2 funct. of compression | 25-45 lbs of force; decrease thickness of breast and decrease oid |
Magnification method | for calcifications, .1mm focal spot, 1.5-2x enlargement, oid increases |
implants | radiopaque, compression difficulat and aec not possible |
breast carcinoma | malignant growth of epithelial cells |
fibroadenoma | benign tumor, smooth mass |
fibrocystic disease | benign fluid filled cysts |
pagets disease | fluid, blood, crust around/on nipple, can indicate cancer |
ax | axillary |
xccl | lat. exaggerated cc |
ml | mediolateral (for localization) |
marker | always on lat side for mammography |
MLO | demonstrates the most mammary tissue, lat aspect of breast and tail |