Category: Safety-44 An older x-ray tube that has evaporated tungsten deposited on the tube window may cause which of the following problems? Decreased tube output Increased half-value layer Arcing of the tube current

Category: Procedures-59 The Pearson method is an AP projection of the:

Category: Image Production-14 Recorded detail can be improved by decreasing: SID OID Motion unsharpness

Category: Image Production-7 In an x-ray machine, the induction motor is used to:

Category: Procedures-34 What anatomic structure is of primary interest when the head is in the lateral position and the central ray enters at the zygoma?

Category: Safety-21 Which of the following factors can affect the amount or the nature of radiation damage to biologic tissue? Radiation quality Absorbed dose Size of irradiated area

4. Steam in a heating system flows through tubes whose outer diameter is and whose walls are maintained at a temperature of . Circular aluminum alloy fins () of outer diameter and constant thickness are attached to the tube, as shown in the figure. Heat is transferred to the surrounding air at , with a combined heat transfer coefficient of . (a). (4 pts) Determine the heat transfer rate for a single fin if the fin efficiency of a single fin is known to be

Category: Safety-40 Moving the image intensifier closer to the patient during fluoroscopy: Decreases the SID Decreases patient dose Degrades image quality

Category: Procedures-11 A radiographic procedure of the esophagus is performed in a PA oblique projection following the introduction of a thick liquid barium sulfate suspension. The central ray should be directed perpendicular to enter at the vertebral level of:

When we subtract a velocity vector from another velocity vector, the result is: