New Quiz 19 Dec Welcome to your Radiography Name: Email: [What item is used to administer oxygen through the nose?] Crash cart Suction unit Defibrillator Nasal cannula None . [Visibility of an object’s edge may be limited by:] Speed class Modulation transfer function Contrast resolution Quantum noise None . [The process of assigning a value to each pixel to represent a gray tone is called:] Quantization Scintillating Nyquist frequency Sampling None . [The amount of time needed for an AEC to terminate the exposure is called:] Exposure latitude Minimum reaction time Chamber response time Electronic time None . [Lead aprons must be worn to protect against which photon–tissue interaction?] Compton Coherent Photoelectric interaction Pair production None . [An imaging exam using a contrast agent to evaluate possible herniated intervertebral discs is called a(n):] Arthrogram Spinal study Myelogram Discography None . [The range of SIDs that may be used with a focused grid is called:] Grid ratio Objective plane Anticutoff distances Grid radius None . [Which of the following bones consists of five fused segments?] Sacrum Axis Thoracic vertebra Lumbar vertebra None . [What degree of reaction is cardiac arrest?] Mild to moderate reaction to contrast agent Severe reaction to contrast agent Not considered a reaction to contrast agent None . [Gross negligence is:] A case that includes the injured person as a contributing party to the injury Loss of life or limb An act that shows reckless disregard for life or limb Found in criminal cases only None . [After a radiographer is gowned and gloved for a procedure,hands may not be placed:] Anywhere on the body because the gown andgloves are sterile Anywhere on the front or sides of the gown Anywhere on the table containing the sterile field Under the arms or on the sides or back of the gown None . [Needles should be recapped after use:] Never Always In a nonsterile field Only during procedures involving a sterile field None . [Differential absorption of the x-ray beam is a function of:] Compton interaction Atomic mass of anatomic structures mAs Photoelectric interaction None . [A procedure used to evaluate biliary and pancreatic pathologic conditions with an endoscope is:] Ultrasound MRI ERCP IVP None . [When oxygen is administered, the usual rate is:] 3 to 5 lb/minute 3 to 5 L/hour 3 to 5 L/minute 5 to 7 L/minute None . [Image acquisition, image display, and image storage are the primary components of what system?] DICOM CR/DR PACS HIS None . [Undesirable fluctuations in brightness are called:] MTF Image noise Quantization Scintillation None . [Which bone is located in the wrist, between the lunate and the pisiform?] Scaphoid Hamate Pisiform Triquetrum None . [For RPO and LPO positions for sacroiliac joints:] Image the joint nearest the image receptor The part must be angled at 10 to 15 degrees to coincide with the angle of the joints Image the joint farthest from the image receptor The central ray must be angled 25 degrees cephalad None . [What condition involves an intestinal obstruction?] Annular carcinoma Crohn disease Hiatal hernia Ileus None . [Added tube filtration should be adjusted by the radiographer:] To “harden” the x-ray beam To remove the soft rays from the x-ray beam To exercise radiation protection Never None . [Wavelength is defined as the distance from:] The x-ray tube to the patient The cathode to the anode The bottom of a wave to the top Peak to peak of the wave None . [The primary type of grid used in diagnostic imaging is:] Crosshatch Parallel Rhombic Focused None . [The structure designated as V is the fig. ] Lamina Spinous process Inferior vertebral notch Inferior articular process None Comment . [The strength of the magnetic fields in a transformer is increased by:] Coiling the wires and placing them in adjoining machines Coiling the wires and letting their magnetic fields overlap Keeping the wires very straight, increasing their effectiveness Replacing the wires with diodes None . [Improper use of grids may result in an image artifact known as:] SNR Moiré pattern Elongation Foreshortening None . [Structure C is the fig.] Pisiform Lunate Triquetral Trapezium None Comment . [For AP projection of the lower ribs, the central ray is directed:] Perpendicular to T10 Perpendicular to T5 Perpendicular to T7 Perpendicular to T12 None . [The first tier of transmission-based isolation precautions is called:] Universal precautions Standard precautions Infection control Liner, nonthreshold None . [The blood count is depressed after a whole-body dose equivalent of at least how many rads?] 10 Sv 0.25 Sv 5 Sv 0.01 Sv None . Time's up
