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Boards; memorize
Radiography need to memorize QC, Landmarks, Rad Safety
| Term | Definition |
|---|---|
| Exposure Timer (QC) | +/- 5% |
| Centering (QC) | 1% of SID must align to centering indicator |
| Thickness Aluminum above 70 kVp | 2.5 mm Al |
| Thickness aluminum 50-70 kVp | 1.5 mm Al |
| Distance (SID) (QC) | +/- 2% SID |
| Collimation (QC) | +/- 2% SID (?) |
| Thickness aluminum below 50 kVp | 0.5 mmm Al |
| coccyx | Symphysis Pubis and greater trochanter |
| S1-S2 | ASIS |
| L4 | iliac crest |
| L3-L4 | umbilicus |
| L3 | inferior costal margin |
| L1 | Transpyloric Plane |
| T12-L3 | kidneys |
| T9-T10 | xiphoid process |
| T7-T8 | inferior angle of scapula |
| T4-T5 | sternal angle |
| T2-T3 | Suprasternal notch (jugular notch) |
| Secondary barrier (Pb equivalent) | 1/32 inch 0.08 cm 1/2 inch overlap of primary |
| C7 | vertebra prominens |
| C5 | Thyroid cartilage |
| Brightness display (QC) | Photometer Brightness/display contrast betwen 2 areas |
| C1 | Mastoid Process |
| Monitor Calibration (QC) | each monitor calibrated to DICOM GSDF (gray scale standard display function) |
| Spatial Resolution (QC) | line pair tools more lines-higher resolution lp/mm |
| Reader Calibrations (QC) | Produce same response to samem exposure levels |
| Exposure linearity (QC) | 10% between mA stations |
| Exposure reproducibility (QC) | +/- 5% exposure values for same technical selection (measuring mGy) |
| kVp calibration (QC) | +/- 5% of assigned |
| AEC testing (QC) | Same receptor exposure despite any changes in thickness or density and despite change in technical factors |
| Mobile C-arm | 30 cm 12 inch |
| Leakage radiation allowed | 1 mGya at a meter |
| Thickness aluminum typical inherent | 0.5-1mm |
| mA range in DR fluoro | 2-5 mA |
| fixed fluoro | 38 cm 15 inches |
| Primary barrier Pb equiv | 7 ft 1/16 in .16 cm, 1.6mm |
| Drape/curtain (Pb/equivelent) | 0.25 mm 0.5 preferred |
| Bucky slot cover (Pb equivalent) | 0.25 mm 0.5 mm preferred |
| Glasses (Pb eq) | 0.35 mm |
| Thyroid Sheild (Pb eq) | 0.5 mm |
| Gloves (Pb equivelent) | 0.25 mm |
| Apron (Pb eq) | 0.5 mm |
| Neurological/CNS | >50 Gy Death in hours or days |
| Gastointestinal | 10-50 Gy Death in one week |
| Hematologic | 1-10 Gy Death in 3-6 weeks |
| Embryo Microencephaly | 0.2-0.4 Gy |
| Embryo per month Dose limit | 0.5 mSv |
| Embryo entire period Dose limit | 5 mSv |
| Uncontrolled area occupancy factor | 0.1 mGy/week |
| Controlled areas occupancy factor | 1 mGy/week |
| Public Exposure under 18 | 100mrem/year (1 mSv) |
| Public exposure Lens of eye | 50 mSv |
| Public Exposure Annual whole body | 5 mSv 10% of occupational |
| Occupational cummulative effective dose limit | 10 mSv x age |
| Occupational extremity | 500 mSv |
| Occupational Bone marrow | 500 mSv |
| Occupational Breast | 500 mSv |
| Occupational Lens of eye | 150 mSv (15 rem) |
| Occupational Whole body dose | 50 mGy |
| Decreased sperm count (after a few weeks) | 100 mGy |
| Suppression of Menstration | 100 mGy |
| Gonadal dose, temperary infertility | 2Gy |
| Gonadal dose, Permanent infertility | 5 Gy |
| CNS Syndrom occurs at what whole body dose | >50 Gy |
| Grid absorption of the useful beam | Cutoff |
| 8:1 Grid Conversion Factor | 4 |
| 5:1 Grid Conversion Factor | 2 |
| 6:1 Grid Conversion Factor | 3 |
| 10:1 Grid Conversion Factor | 5 |
| 12:1 Grid Conversion Factor | 5 |
| 16:1 Grid Conversion Factor | 6 |
| DAP meter | Dose area Product Used for patient Dosimetry |
| Portion of the collimator that reduces off-focus radiation | Shutter closest to the tube port |
| Unit of measurement for absorbed dose | Gray |
| Average lifespan of an erythrocyte | 120 Days |
| Contrast resolution of a CR/DR system is deteremined by | bit depth |
| mA is selected at | Rheostat |
| dose-response model best represents the basis for radiation protection guidelines | linear-non threshold stochastic |
| Skeletal abnormalities embryo | 3 weeks to 20 weeks |
| Acute diverticulitis contrast medium preferred, especially with a fever | water-soluble iodinated |
| Sum of the individual doses receibed in a given period by a specific population from expsosure to a specified source of radiation | Collective Effective Dose |
Created by:
rad123
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