ITS THE FINAL COUNTDOWN Flashcards
For every five degrees of tube tilt, the tube should be moved towards the bucky a. 5cm b. 3in c. 1in d. 1cm
C
The central ray of the AP thoracic is always directed to: a. At the level 1in below C7 Spinous process b. at the level of the sternal notch c. at the level of the sternal angle (angle of louis) d. At the level of T6 e. At the level of L1
D
The “ten day rule” for females of child bearing age refers to performing non- emergency abdominal-pelvic x-ray ______ a. During the 10 days after the onset of ovulation b. During the 10 days before the oneset of ovulation c. During the 10 days after the onset of menstruation d. Except during the 10 days before the onset of ovulation until 10 days after e. Except during the 10 days before the onset of menstruation
C
Where is the central ray for vertex? a. C1 b. Centre of film c. Centre head d. All of the above
D
The theoretical maximum energy of any photon in an x-ray beam is equal to which of the following? a. The SID b. The exposure time c. The mA set on the console d. the mAs value of the exposure e. the kVp set on the console
E
Which of the following is in the correct order from the most radiopaque to the least _____? a. Metal, Air, Fat, Water, Bone b. Metal, Bone, Water, Fat, Air c. Air, Water, Fat, Bone, Metal d. Air, Fat, Water, Bone, Metal
B
To maintain constant radiographic density on a film, an increase of 15% in kVp should be accompanied by: a. Keeping the mAs constant b. Increasing the mAs by 1/4 c. Decreasing the mAs by 1/4 d. Decreasing the mAs by 1/2 e. Increasing the mAs by 1/2
D
The Intensifying screen is located: a. In the cassette b. In the collimator c. In the bucky d. In the filter e. In the grid
A
Which of the following is NOT a radiation protection device? a. Intensifying screen b. Gonadal screen c. Compensating filter d. Grid e. Lead Apron
D
Scatter increases on radiograph when: a. mAs is increased b. mAs is decreased c. SID is increased d. kVp is decreased e. kVp is increased
E
The feet must internally rotated 15 degrees on the AP lumbo[pelvic projection to achieve which of the following? a. No internal rotation is necessary b. True AP projection of the proximal femur and femoral neck c. To avoid patient movement during exposure d. Provide additional radiation protection to the patient e. To facilitate x-ray analysis
B
The function of a filter is to _____ a. remove soft x-rays b. absorb x-ray c. remove scatter radiation d. reduce the filed size of the beam e. Make a latent image visible
A
A definition of radiographic contrast would be the _____? a. degree of blackening b. Amount of visible detail c. Tonal relationship between one density and another d. Amount of geometric detail
C
The diagram (to the right) depicts the effects of beam divergence (starting at the top) and magnification on an AP lumbar radiograph. the Circle (A,B,C) represent hypothetical lesions within the abdomen. Which of the following statements is true concerning LESION A as it appears on the film (at the bottom) a. Lesion A is foreshortened and magnified compared to B and C b. Lesion A is elongated and magnified compared to B and C c. Lesion A is elongated but less magnified than lesion B d. Lesion A is foreshortened and is the least magnified of the three lesions
B
Of the following, which type of radiation is the major constituent (the larger portion) emitted form the target? a. Characteristic Radiation b. Bremsstrahlung Radiation c. Compton Scatter d. Photoelectric Effect e. None of the above
B
The lateral sacrum and coccyx are often taken together as one view, the AP projections, however, must be taken separately as: a. the SID’s are different b. the OID are different c. the Tube angles are different d. The filter / shielding are different
C
The principal electrostatic law implies that? a. a proton will repel an electron b. a proton will repel a neutron c. a neutron will repel a neutron d. an electron will repel a neutron e. an electron will repel and electron
E
With all other factors unchanged, if OID is reduced, image magnification will be ____ a. distortionally increases b. directly increased c. directly decreased d. changed slightly, but not with a visible change e. not changed at all
C
Which of the following interaction between x-ray photons and matter make the most significant contribution to patient does? a. photoelectric effect b. Compton scatter c. coherent scatter d. bremsstrahlung radiation e. added filtration
A
To determine if the patient is probably a male on the AP pelvis view: a. the patient was positioned PA b. The pelvic opening is open and round shape c. the angle below the symphysis pubis is obtuse d. the angle below the symphysis pubis is acute e. look for the heart shaped gonadal shield
D