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RADT 465
ARRT Registry Review Covering Image Acquisition and Evaluation
| Question | Answer |
|---|---|
| This occurs when an x-ray photon interacts with matter and disappears, as a photoelectric effect? | Absoprtion (Pg. 216) |
| This occurs when there is partial transfer of energy to matter, as in the Compton effect? | Scattering (Pg. 216) |
| An increase in kilovoltage will cause an ______ in scattered photons, which will contribute to fog. | Increase (Pg. 216) |
| What kind of laser is used in a scanner to obtain pixel data on a PSP? | Helium- neon laser (Pg. 217) |
| ____ is influenced by the type of rectification, total filtration and kv. | Half value layer (HVL) (Pg. 217) |
| An electronic image (CR/DR), radiograph can be manipulated on a CRT through? | Post processing (Pg. 218) |
| Aligning the x-ray tube, anatomic part, and IR so that they are parallel reduces? | Shape distortion (Pg. 218) |
| Angling the x-ray tube can cause ______ of the part. | Elongation (Pg. 218) |
| Magnification is ______proportional to SID and ______ proportional to OID. | Inversely and directly (Pg. 218) |
| If you do not store film in a vertical position, the film could result in? | Pressure marks (Pg. 219) |
| If the energy of a photon increases, wavelength will ________? | Decrease (Pg. 219) |
| True/False: An increase in milliamperage serves to increase the number of photons produced at the target, but is unrelated to their energy. | True (Pg. 219) |
| Defined by the height of the lead strips to the width of the interspace material? | Grid ratio (Pg. 219) |
| Kilovoltage affects both ______ and ______ of the x-ray beam? | Quantity and quality (Pg. 219) |
| Defined by the degree of difference between adjacent densities? | Radiographic contrast (Pg. 221) |
| Contrast obtained with a grid compared with contrast without a grid is known as? | Contrast improvement factor (Pg. 225) |
| Refers to the area being viewed? | Field of view (FOV) (Pg. 224) |
| Pathological conditions such as congestive heart failure, pneumonia, and pleural effusion would require an _____ in exposure factors? | Increase (Pg. 227) |
| When testing for quality assurance, __________ must be accurate to within 2% of the SID. | Beam alignment (Pg. 226) |
| The larger the focal spot size, the ____ the blur produced in an image. | Greater (Pg. 226) |
| When field size _____, scatter radiation decreases, and image quality increases? | Decreases (Pg. 229) |
| When referring to the scale of contrast, ________ determines the midbrightness. | Level control (Pg. 232) |
| When referring to the scale of contrast, ________ determines the total number of grays in the image. | Window control (Pg. 232) |
| Refers to the number of lead strips per inch? | Grid frequency (Pg. 237) |
| A graphic representation of pixel value distribution? | Histogram (Pg. 238) |
| Occurs when the intensifying screen absorbs x-ray photon energy, emits light, and then ceases the light as soon as the energy source ceases? | Fluorescence (Pg. 249) |
| Freckled like appearance made on some radiographs caused by very fast imaging? | Quantum mottle (Pg. 249) |
| The brightness of fluoroscopic images is amplified through? | Image intensification (Pg. 249) |
| Refers to the equipment and its safe and accurate operation? | Quality control (Pg. 249) |
| _____ radiation comprises 10% to 30% of the x-ray beam. | Characteristic (Pg. 247) |
Created by:
bspayne93
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