| Question | Answer |
| Misrepresentation of the true size and shape of an object is the definition of? | Distortion |
| What is the most important factor in controlling distortion? | OID |
| What keeps distortion to a minimum? | Increased SID |
| What are the 2 types of distortion that can reduce the quality of a radiograph? | Size and shape |
| What occurs when the SID is increased? | Image is reduced |
| What size focal spot is used when doing macroradiography? | .3mm |
| When an object is placed halfway between the tube and the film, the image will be how many times larger? | 2 times |
| What percentage increase is usually used for magnification radiography? | 100% |
| The ratio of SID to SOD represents which of the following? | Magnification ratio |
| Tube angulation will produce which type of distortion? | Elongation |
| Magnification distortion can be used to an advantage for which of the following radiographic procedures? | Cerebral angiography |
| Changing the shape of an object is called? | Distortion |
| An x-ray tube that is designed for magnification radiography is referred to as what? | A fractional focus tube |
| What factor can affect shape distortion? | X-ray tube angulation |
| What advantage is there to magnifying an object? | Small objects become visible |
| A misrepresentation of the shape of an object may be caused by? | An angled object, an angled x-ray tube, or an angled cassette |
| What would not be used to minimize radiographic distortion? | Shortest possible exposure time |
| To avoid shape distortion, what must be paid close attention to? | Part angulation |
| How does magnification affect radiographic quality? | Decreases detail |
| Which of the following will produce the largest image? | 40" SID, 3" OID |
| If the SID is increased the same as the OID, what will the resultant radiograph show? | An increase in size distortion |
| Size distortion is affected by? | Geometric factors |
| What can be done to help compensate for an angled part? | Align tube, part and film |
| What is the magnification factor if an object measures 4 cm, but the radiographic image is 8 cm? | 2x |
| What will occur when the OID is decreased? | The image is closer to actual size |
| Which of the following will produce the smallest image? | 72" SID, 2" OID |
| If the SID increases, how is distortion affected? | Distortion goes down |
| If the air-gap technique is used, how is distortion affected? | Distortion goes up |
| If the SOD increases, how is distortion affected? | Distortion goes down |
| If the phospor size increases, how is distortion affected? | It has no effect |
| If the grid ratio increases, how is distortion affected? | It has no effect |
| If the tube angle increases, how is distortion affected? | Distortion increases |
