Welcome to your Radiography Name: Email: [It is important for the radiographer to obtain the recent history of radiographic examinations performed on a patient so that:] An overdose of iodinated contrast media does not occur from examinations recently performed An overdose of radiation is not administered Unnecessary examinations may be avoided Costs may be contained None . [Image noise may be described as:] Undesirable fluctuations in brightness Undesirable fluctuations in contrast Inadequate spatial resolution A function of mAs None . [The number of pixels/mm in an image is called:vvvv] Pixel density Bit depth Pixel pitch Matrix depth None . [The SI unit of radioactivity is the:] Becquerel Gray Quality factor Curie None . [What provides an approximate skin dose where the x-ray beam is entering the patient?] Sievert Becquerel Air kerma Effective dose None . [Bit depth is equal to:] 2n (n equals the number of bits) 4096 shades of gray Pixel pitch Bits times bytes None . [A reaction that causes the patient’s skin to turn cyanotic means:] The skin is turning yellow The skin is turning white The skin is turning blue The skin is turning red None . [The available gray scale of an imaging system is determined by:] Pixel pitch Bit depth Exposure latitude Image latitude 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 . [Because the x-ray tube requires DC to operate properly, what device is required in the x-ray circuit?] Autotransformer Step-up transformer Rectifier Falling load generator None . [When the clavicle is being radiographed, which of the following statements are true? 1. PA projection must always be used 2. A central ray angle of 25 to 30 degrees cephalad is used for the PA axial projection 3. The patient’s head should be turned away from the affected side 4. AP projection may be used for patient comfort 5. An erect position may be used for patient comfort 6. A central ray angle of 25 to 30 degrees caudad is used for the PA axial projection] 1, 2, 3, 4, 5 1, 3, 4, 5 2, 3, 4, 5 3, 4, 5, 6 None . [Diabetic patients should be scheduled:] Later because of their need for insulin Early because of their need for insulin Just before mealtime Just after mealtime None . [Digital imaging is driven by:] kVp mAs IR speed class Exposure None . [Which of the following bones has a coronal suture?] Frontal bone Temporal bone Occipital bone Parietal bone None . [The structure designated as V is the fig. ] Lunate Scaphoid Trapezium Trapezoid None Comment . [Cells that are least sensitive to radiation exposure include:] Ova and sperm Epithelial cells Nerve and muscle cells Blood cells None . [When a predetermined level of ionization is reached in the ionization chamber, what does the machine do?] The unit shuts off as a result of a malfunction The maximum allowable time has been reached The highest allowable dose to the patient has been reached The exposure is terminated None . [The CR reader unit scans the IP with a(n):] Infrared light Laser Sonar Visible white light None . [What condition is characterized by soft bones resulting from deficiency of vitamin D and sunlight?] Hydrocephalus Paget disease Osteoporosis Rickets None . [Venipuncture:] May be performed by a radiographer where allowed by state law May be performed by a nurse only Must be performed by a radiology supervisor May be performed by a radiographer under any circumstances None . [Which of the following results in the production of a photoelectron that is ejected from the atom?] Photoelectric interaction Compton interaction Coherent scatter Pair production None . [Photoelectric interaction occurs at what level in the atom?] L-shel K-shell M-shel Outer shell None . [What is the site of most nosocomial (health careacquired) infections?] Urinary catheter Chest tube NG tube Venous catheter None . [The visible image may also be called the:] Manifest image Image-in-waiting Preprocessed image Latent image None . [When oxygen is administered to the patient, the usual flow rate is:] 3 to 5 L/second 5 L/hour 1 to 3 L/minute 3 to 5 L/minute None . [An integrated system of images and information is called:] DICOM DDR CR/DDR PACS None . [Which of the following sets of exposure factors would produce an image with the poorest spatial resolution?] 60 mAs, 80 kVp, 40-inch SID, 4-inch OID 30 mAs, 92 kVp, 40-inch SID, 4-inch OID 120 mAs, 92 kVp, 20-inch SID, 4-inch OID 15 mAs, 100 kVp, 40-inch SID, 4-inch OID 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 . [When an AP projection of the hip is performed, the central ray is directed:] Perpendicular to a point 2 inches medial to the anterior superior iliac spine (ASIS) at the level of the superior margin of the greater trochanter Parallel to a point 2 inches medial to the ASIS at the level of the superior margin of the greater trochanter At a 15-degree cephalad angle To the level of the ASIS None . [What occurs when radiation transfers its energy to the cellular cytoplasm?] Indirect effect Target theory Direct effect Doubling dose None . Time's up
