PATIENT CARE (18) - ANS 1. Pt. Interactions & Mgmt.
A. EXPOSURE FACTORS - ANS kVp and mAs
kVp - ANS high kVp/low mAs techniques should be used to reduce the exposure to the patient with new digital imaging (CR and DR) higher kVp techniques should be used to compensate for the slow...
, PATIENT CARE (18) - ANS 1. Pt. Interactions & Mgmt.
A. EXPOSURE FACTORS - ANS kVp and mAs
kVp - ANS high kVp/low mAs techniques should be used to reduce the exposure to the
patient with new digital imaging (CR and DR) higher kVp techniques should be used to
compensate for the slower digital systems
mAs - ANS which of the following will produce the least exposure to this patient?
50 mAs, 60 kVp
K
25 mAs, 70 kVp
(answer: both techniques will produce equal exposure to the image receptor, but the lower mass
and higher kVp will produce the least exposure to the patient)
C
B.Shielding - ANS 1. rationale for use
2. types
LO
3. placement
Rationale for use (consideration such as age, pregnancy, repetition) - ANS example routine
special
- minimize radiation dose to the reproductive organs when they are in or near (within 5 cm) a
YC
properly collimated beam
-shaped contact shields can reduce male gonadal exposure by 90 % and contact shields can
reduce female exposure by 75 %
-shield if reproductive age
-shield children and pregnant patients front and back
-the more often the patient is exposed, the more we must be concerned with shielding
D
(example: KUB vs IVU)
Types (gonadal shields, breast shields, protective lenses, thyroid collar, wedges, filters and eye
U
cups) - ANS -flat contact
- shaped contact
- shadow shield
ST
- protective lenses (glasses)
Placement - ANS - Use shields if the radiographic image will not be compromised
-gonads, breasts and bone marrow are most radiosensitive, be sure to shield these areas
whenever possible
C. Beam Restriction - ANS 1. purpose of primary beam restriction
2. Types (collimators)
1. purpose of primary beam restriction - ANS -restrict primary beam to area of interest to
decrease patient dose
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