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| Question | Answer |
|---|---|
| What is diagnostic yield? | The amount of clinically useful information on an image. Yield must outweigh the cost of the exam. |
| What is diagnostic efficacy (efficiency)? | How accurately an image shows the patient’s real condition. |
| What is the difference between yield and efficacy? | Yield = how much useful info. Efficacy = how accurate that info is. |
| Name the essential parts of an x-ray system. | X-ray tube, collimator, table, generator/control console, image receptor. |
| What do kVp and mAs control? | kVp = beam energy/penetration. mAs = quantity of x-rays. |
| Why do exposure controls matter? | They decide patient dose and image quality. Wrong factors cause repeats and extra dose. |
| What is the purpose of the collimator? | Limits the beam to the area of interest. Cuts scatter and protects the patient. |
| Name two ways x-ray tables differ. | Height (fixed vs adjustable), top movement (floating), tilting, and whether they have a Bucky. |
| Name the types of tube support systems. | Floor-mounted, floor-to-ceiling, ceiling-mounted, C-arm. |
| What is the upright image receptor used for? | Vertical exams like chest and spine. Usually has a grid and AEC cells. |
| How do CR and DR differ? | CR uses a cassette/plate that is scanned. DR is a flat panel that captures the image directly. DR is faster. |
| Name three positioning aids. | Sponges, sandbags, tape, compression bands, immobilization boards, head clamps. |
| What is anatomical position? | Standing, face and palms forward, feet together. All directional terms start from this. |
| Name the three main body planes. | Sagittal (left/right), coronal (front/back), transverse/axial (top/bottom). |
| Proximal vs distal | Proximal = closer to the trunk. Distal = farther from the trunk. |
| Pronation vs supination | Pronation = palm down. Supination = palm up. |
| What are the routine chest positions? | PA chest and left lateral chest. |
| What is a KUB? | AP supine abdomen image. |
| Why is patient interaction important? | It lowers anxiety, improves cooperation, and reassures family. |
| Name one difference between inpatients and outpatients. | Inpatients are often sicker and need more help moving. Outpatients are usually more independent and expect a quick visit. |