Welcome to your Radiography Name: Email: [The measurement of the luminance of a monitor is called:] Density Contrast Brightness Detail visibility None . [The prefix that means “false” is:] Retro- Endo- Pseudo- Epi- None . [The smallest resolvable area in a digital imaging device is:] Detector size Detector element Matrix size Focal-spot size None . [For radiography of the sternoclavicular articulations:] PA and lateral projections are required RAO or LAO positions are used to eliminate superimposition of joints onto vertebral shadow The patient should breathe during exposure; a falling load generator should be used if possible An AP projection is used to reduce magnification of joints None . [The process of assigning a value to each pixel to represent a gray tone is called:] Quantization Scintillating Nyquist frequency Sampling None . [Which of the following results in total absorption of an incident x-ray photon?] Photoelectric interaction Compton interaction Classic scatter Pair production None . [Which photon-tissue interaction produces a recoil electron and a scattered photon in diagnostic radiography?] Compton Coherent Photoelectric Pair production None . [The phases of the cellular life cycle, in order, are:] Prophase, metaphase, anaphase, telophase Interphase, prophase, metaphase, anaphase, telophase G1, S, G2, telophase Interphase (G1, S, G2), prophase, metaphase, anaphase, telophase None . [Modulation transfer function (MTF) is:] The controlling factor of contrast resolution A measure of the ability of the imaging system to preserve signal contrast as a function of the spatial resolution A function of exposure A function of pixel density None . [Use of technique charts:] Is unnecessary for any exam because of AECs Does not require that the part thickness be measured with calipers Is usually based on fixed mAs and variable kVp Is helpful when manual techniques are used None . [What is the source of bremsstrahlung and characteristic rays?] Anode mA meter Falling load generator Step-up transformer None . [For shielding purposes, what is the x-ray control booth considered?] Secondary protective barrier Primary protective barrier Equivalent to a lead apron A tertiary protective barrier None . [The best way to keep the radiation dose to the patient low is:] Distance Shielding Time Avoidance of repeat exposures None . [Calipers are used to measure:] Radiation dose Patient part thickness Patient BMI Patient body thickness None . [What type of joint has opposing surfaces that are convex-concave, allowing great freedom of motion?] Ball-and-socket joint Pivot joint Hinge joint Saddle joint None . [A software function that evens the brightness displayed in the image is called:] Smoothing Equalization Postprocessing Subtraction None . [The annual effective dose limit for the general public, assuming frequent exposure, is:] 0.5 mSv 500 mSv 0.05 mSv 1.0 mSv None . [Critique Figure ] Radiograph was taken with interpupillary line parallel to IR Radiograph was taken with MSP perpendicular to IR Radiograph was taken with interpupillary line perpendicular to IR Radiograph was taken with MSP parallel to central ray None Comment . [What body type has the stomach and gallbladder low, vertical, and near the midline?] Hypersthenic habitus Sthenic habitus Hyposthenic habitus Asthenic habitus None . [Which of the following describes the relationship between mAs and receptor exposure?] Receptor exposure is directly proportional to mAs Receptor exposure is inversely proportional to mAs Receptor exposure is directly proportional to mAs2 mAs controls the number of electrons boiled off the anode and the number of x-rays produced None . [Atomic mass refers to:] The number of protons plus the number of neutrons The number of electrons The number of electron shells The number of protons None . [Cellular components contained in the cytoplasm are called] Free radicals Ions Organelles DNA strands None . [What plane divides the body into superior and inferior portions?] Transverse plane Midcoronal plane Median sagittal plane Sagittal plane None . [An imaging exam using a contrast agent to visualize possible meniscal tears is called a(n):] Myelogram Arthrogram Joint manipulation study Sports injury exam None . [What condition includes enlarged kidneys containing numerous cysts?] Polycystic kidney disease Renal calculus Wilms tumor Renal cysts None . [The portion of contrast that is caused by variationsin the anatomy or that is secondary to pathologicchanges is called:] Radiographic contrast Anatomic contrast Pathologic contrast Subject contrast None . [The SI unit of absorbed dose is the:] LET Gray Curie Sievert None . [Effective dose limits may be found in what published material?] Dose limit reports NCRP reports Environment Protection Agency reports Health and Human Services reports None . [A positive contrast agent administered to a patient in the form of an inert salt is:] Barium sulfate Iodine Perforated ulcers or ruptured appendix Air None . [For a PA projection of the hand, the central ray is centered:] Perpendicular to the first metacarpophalangeal joint Perpendicular to the third metatarsophalangeal joint Parallel to the third metacarpophalangeal joint Perpendicular to the third metacarpophalangeal joint None . Time's up
