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Radiology Terminolog
| Question | Answer |
|---|---|
| Scatter radiation | The result of either classical scattering or the Compton effect. |
| Secondary radiation | Radiation produced by the photoelectric effect. |
| Photoelectric effect | One of three interactions of radiation with the human body tissues. In this effect, the x-ray photon is totally absorbed in the body tissue. |
| Grid ratio | The effectiveness of a grid. |
| Grid lines | Images on the radiograph produced by strips of lead placed in front of the cassette. |
| Stationary Grids | High-frequency grids that do not move during exposure but they produce grid lines. |
| Grid cut-off | Decreased radiographic density frequently accompanied by the appearance of obvious grid lines. |
| Parallel grid lead strips in a grid precisely aligned to the x-ray beam at a specific source-image distance. | A grid whose radius is infinity. |
| Grid frequency | The number of lead strips per inch in a grid. |
| Grid radius | The focusing of |
| Abduction | Away from body |
| Inversion | Hand or foot turned inward |
| Midsagittal | Dives body into equal right and left sections |
| Midcoronal | Divides body into anterior and posterior sections |
| Transverse | Cross-sectional slices of the body |
| Radiograph | Images illustrated on x-ray film |
| Projection | Path of beam |
| Anatomical Position | Patient standing with palms up, head straight, arms at the side |
| Supine | Lying on back |
| Prone | Lying on front |
| Recumbent | Patient lying down, not standing up |
| Trendelenburg | Head lower than feet |
| Dorsal | Back |
| Ventral | Front |
| PA | Central ray path from posterior to anterior |
| AP | Central ray from anterior to posterior |
| Lateral | Patient on side |
| Oblique | Part angled sometimes 45 degrees |
| Decubitus | Horizontal beam |
| Caudal | Tube angled toward feet |
| Cephalic | Toward head |
| Pronate | To turn arm so that palm of hand faces down |
| Projection (Central Ray) | Describes path of radiation as it goes from x-ray tube through patient to film. |
| Decubitus projection | Patient is lying down and CR is parallel to horizon |
| Left Posterior Oblique | Patient is lying face up with right side up and left side down. |
| Proximal | Near the source |
| Inferior | Below |
| Superior | Above |
| Distal | Farthest from the source |
| Flexion | Bending of part |
| Extension | Straightening of part |
| Right Anterior Oblique | Patient's right anterior surface touching cassette at a 45-degree angle. |
| Medial | Refers to parts toward the midline or middle of a part. |
| JRCERT | Agency that accredits programs in RT |
| ASRT | National professional society for technologists. |
| IEMA | State agency that licenses technologists. |
| ARRT | Certifying agency |
| ISSRT | State professional society for technologists |
| What term refers to the study of the function of body organs? | Physiology |
| Which term refers to a general body position? | Recumbent |
| Deep | Farther from the skin surface |
| Contralateral | On the opposite side |
| Ipsilateral | On the same side |
| Superficial | Near the skin surface |
| Cephalad | Toward the head end of the body |
| Caudad | Away from the head end |
| AEC | Automatic exposure control |
| mAs | Milleampere-second |
| ASIS | Anterior superior iliac spine |
| US | Ultrasound |
| Plantar | Sole of the foot |
| Intermediate | Between a more medial and more lateral structure |
| Parietal | Wall or lining of a body cavity |
| Visceral | Covering of an organ |
| Dorsum | Top or anterior surface of the foot or posterior surface of hand |
| Circumduction | Circular movement of limb away from body |
| Rotation | Turning or rotating of body/body part around its axis |
| Tilt | Tipping or slanting a body part slightly |
| Fowler's Position | Head higher than feet |
| Lithotomy Position | Supine position with knees and hip flexed and thighs abducted and rotated externally, supported by ankle supports (Pap Smear) |
| Sim's Position | Recumbent position with patient lying on left anterior side with left leg extended and right knee/thigh partially flexed |
| Dorsal Recumbent | Lying on back |
| Ventral Recumbent | Lying face down |
| Decubitus Position | Patient lying down, CR is horizontal and parallel with floor |
| Lordotic Position | Patient leans backward in upright position, with only shoulder in contact with IR |
| Lateral Projection | Perpendicular CR enters either side of body/part, passes traversely along coronal plane, and exits opposite side |
| Tangential Projection | CR directed toward outer margin of a curved body surface to profile body part just under surface |
| True Position | Specifically indicates that body part must be placed exactly in anatomic position |
| Axial Projection | Longitudinal angulation of CR with long axis of body or body part, 10 degrees or more |
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ladypolaris14
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