front 1 What is the SI unit of radiation measurement for absorbed dose? | back 1 Gray |
front 2 Which term is replacing "exposure" to describe skin dose? | back 2 Air kerma |
front 3 What is the annual whole body effective dose (ED) for a technologist? | back 3 50 mSv or 5 rem |
front 4 What is the cumulative lifetime ED for a 25 year old technologist? | back 4 250 mSv |
front 5 What is the annual ED limit for an individual younger than 18 years of age? | back 5 1 mSv or 0.1 rem |
front 6 The federal set maximum limit on exposure rates for intensified fluoroscopy units is: | back 6 10 R/minutes |
front 7 For most modern equipment, the average fluoroscopy tabletop exposure rate is: | back 7 1 and 3 R/minutes |
front 8 What is the primary purpose of x-ray tube filtration? | back 8 Absorb lower (unusable) energy x-rays |
front 9 Which of the following results in the highest ED for females (assuming no specific area shields are used)? | back 9 AP thoracic spine (14 X 17 inch collimation) |
front 10 The use of a 1-mm lead equivalent gonadal shield reduces the gonadal dose by _________ if the gonads are within the primary x-ray field. | back 10 50% - 90% |
front 11 Which type of shield is ideal when the affected tissue is part of a sterile field? | back 11 Shadow shield |
front 12 True/False: Low kV and high mAs techniques greatly reduce patient dose compared with high kV and low mAs techniques. | back 12 False |
front 13 True/False: The total ED for females on an AP chest projection is more than double for that of a PA chest. | back 13 True |
front 14 True/False: The use of a positive beam limiting (PBL) collimator is no longer required by the FDA for new x-ray equipment manufactured after 1994. | back 14 True |
front 15 True/False: Collimators must be accurate within 5% of the selected SID. | back 15 False |
front 16 Which of the following is not one of the cardinal principles of radiation protection? Distance Time Shielding Collimation | back 16 Collimation |
front 17 Which one of the following changes will best reduce patient dose? Decrease kV and increase mAs Increase kV and lower mAs Using a grid Increase mAs and lower kV | back 17 Increase kV and lower mAs |
front 18 Where is the safest place for the technologist to stand during a fluoroscopic procedure? | back 18 behind the radiologist |
front 19 Which of the following protection devices must be employed during a fluoroscopic procedure? Bucky slot shield Lead gloves Compensating filter Restraining devices | back 19 Bucky slot shield |
front 20 The ED for a pregnant technologist per month is: | back 20 0.5 mSv (0.05 rem) |
front 21 True/False: A fetal personnel dosimeter is worn at the level of the waist by a pregnant technologist during fluoroscopy. | back 21 True |
front 22 True/False: All administrative staff in the radiology department must wear a personnel dosimeter even if not involved with patient care directly. | back 22 False |
front 23 True/False: The ICRP and ARC have determined that the "10-day rule" is obsolete for procedures of the abdomen and pelvis. | back 23 True |
front 24 True/False: ALARA does not apply to digital imaging. | back 24 False |
front 25 True/False: Using a different algorithm to process an overexposed CR image is an acceptable and ethical practice. | back 25 False |