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1- misalignment of the tube part IR relationship results in ?
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2- in electronic imaging as digital image matrix size increases?
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RADT465
ARRT review covering Equipment Operation & Quality Control and Image Acquisition
| Question | Answer |
|---|---|
| 1- misalignment of the tube part IR relationship results in ? | Shape distortion (PAGE. 179 ) |
| 2- in electronic imaging as digital image matrix size increases? | Pixel size decrease (PAGE. 179 ) |
| 3- an algorithm as used in X-ray imaging is an ? | Series of variable instructions (PAGE. 179 ) |
| 4- the component of a CR image plate IP that records the radiologic image is the? | Photostimulable phosphor (PAGE181. ) |
| 5- the radiation dose received by the digital detector for each image is indicated by the ? | Exposure indicator (PAGE.181 ) |
| 6- the luminescent light emitted by the PSP is transformed into the image seen on the CRT by the ? | ADC (PAGE. 182 ) |
| 7- the term windowing describes the practice of ? | Changing the image brightness and/ or contrast scale (PAGE.183 ) |
| 8- potential digital image post processing tasks include? | Annotation, inversion/ reversal (PAGE. 185 ) |
| 9- what pixel size has a 612 x 512 matrix with 20 cm field of view FOV ? | 0.04 mm/ pixel (PAGE.185 ) |
| 10-all the following affect the exposure rate of the primary beam except? A- distance B- kilovoltage C- filed size | Filed size (PAGE.186 ) |
| 11- term is used describe unsharp edges of tiny radiographic details? | Blur (PAGE. 186 ) |
| 12- analog to digital conversion is required in the following imaging system? | CR (PAGE.188 ) |
| 13- for the same FOV, spatial resolution will be improved using ? | A lager matrix (PAGE188. ) |
| 14- the absorption of useful radiation by a grid is called ? | Grid cutoff (PAGE. 189 ) |
| 15- exposure rate will decrease with an increase in ? | SID (PAGE. )196 |
| 16- pathologic conditions probably will require a decrease in exposure factors? | osteoporosis (PAGE.197 ) |
| 17- as window level increases? | Brightness increases (PAGE. 200 ) |
| 18- the X-ray image seen on the computer display monitor is ? | Analog image (PAGE.200 ) |
| 19-requires two exposures to evaluate focal spot accuracy? | Slit camera (PAGE. 203 ) |
| 20- focusing distance is associated with ? | Girds (PAGE. 203 ) |
| 21-the processing algorithm represents the ? | Anatomical part and projection (PAGE.204 ) |
| 22- pathologic conditions would require an increase in exposure factors? | Ascites (PAGE. 207 ) |
| 23- boxes of film stores in too warm an area may be subject to ? | Film fog (PAGE.207 ) |
| 24- X-ray film emulation is most sensitive to safelight fog? | During development (PAGE. 208 ) |
| 25- how often are radiographic equipment collimators required to be evaluated? | Semiannually (PAGE. 209 ) |
| 26- during CR imaging the latent image present on PSP is changed to a computerized image by ? | ADC (PAGE. 209 ) |
| 27- exposed silver halide crystals are changed to black metallic silver by? | Reducers (PAGE. 209 ) |
| 28- examination should 70 kV not be exceeded? | Intravenous urogram (PAGE. 214 ) |
| 29- What frequency must radiographic equipment be checked for linearity and reproducibility? | Annually (PAGE.259 ) |
| 30- light sensitive AEC devices are know as ? | Photo timers (PAGE.260) |
| 31- the electron cloud within the x ray tube is the product of a process called ? | Thermionic emission (PAGE.261) |
| 32- a slit camera is used to measure? | Focal spot size and spatial resolution (PAGE.262) |
| 33- circuit devices that permit electrons to flow in only one direction are ? | Solid state diodes (PAGE.262) |
| 34- devices converted mechanical energy to electrical energy? | Generator (PAGE.262) |
| 35- the type of X-ray tube designed to turn on and off rapidly, providing multiple short, precise exposure? | Grid controlled (PAGE.263) |
| 36- the voltage ripple associated with a three phase 12 pulse rectified generator is about ? | 13% (PAGE.263) |
| 37- a high speed electron is decelerated as is attached to a tungsten atom nucleus this results in ? | Bremsstrahlung radiation (PAGE.263) |
| 38- the procedure whose basic operation involves reciprocal motion of X-ray tube and IR? | Tomography (PAGE.263) |
| 39- device is used to control voltage by varying resistance? | Rheostat (PAGE264 ) |
| 40- the regular measurement and evaluation of radiographic equipment components and their performance is most accurately termed ? | Quality control (PAGE.264) |
| 41- as electron impinge on the anode surface, less than 1% of their kinetic energy is changed to ? | X-ray (PAGE.264) |
| 42- when the radiographer selects kilo voltage on the control panel which device is adjusted? | Auto transformer (PAGE.264) |
| 43- star and wye configurations are related to? | Three phase transformers (PAGE.265) |
| 44- congruence of the X-ray beam with the light field is tested using ? | Radiopaque objects (PAGE.265) |
| 45-the kV setting on radiographic equipment must be tested annually and must be accurate to within? | +/- 4 kV (PAGE.265) |
| 46- the device used to test the accuracy of the X-ray timer is the ? | Spinning top (PAGE. 265 ) |
| 47- term describe the amount of electric charge flowing per second? | Current (PAGE. 267 ) |
| 48- which part of an induction motor is located out side the X-ray tube glass envelope? | Stator PAGE.268 ) |
| 49- functions to increase the milliamperage. | Increase in heat of the filament (PAGE. 269 ) |
| 50- the most likely produce the highest quality radiographic image ? | High SNR (PAGE. 273) |
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