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Body PlanesPositions
Bontrager.
Term | Definition |
---|---|
Sagittal Plane | Divides right and left |
Coronal Plane | Anterior and posterior |
Horizontal (axial) plane | superior and inferior parts |
Oblique Plane | NOT parallel to any other plane, it is at an angle or a slant. |
Occlusal plane | Horizontal plane formed by biting surfaces of the upper and lower teeth with jaws closed. |
Positions differ from projections in that.. | Positions refer to what is closest to the image receptor, or where the central ray is exiting. |
Prone | Lying on abdomen, facing downward |
Trendelenburg | Recumbent position with head lower than feet |
Fowlers | Recumbent with head higher than feet |
Sims | Recumbent oblique position with pt lying on left anterior side, right knee and thigh flexed. |
Lateral | side or side view. Part closest to the IR or part from which CR exits. Lateral is at a 90 angle. |
Oblique | angled person. Part closest to the IR or CR exits. |
Supine | Laying on back, facing up |
LPO. Describe position. | Left posterior oblique. Person is standing with left shoulder to IR facing/angled towards the CR. (left backside of shoulder to IR) |
RAO. Describe position. | Right anterior oblique. Person is standing with right shoulder to IR, facing/angled to the IR. |
Decubitus | Lying on a horizontal surface. Central Ray is ALWAYS horizontal. Used for detecting air-fluid levels. |
Right lateral decubitus position, with a PA projection. | Pt lies on their right side, anterior closest to IR. "Right lateral decubitus position (PA projection)" |
Left lateral decubitus position, with a AP projection. | Pt lies on left side, posterior closest to IR. "Left lateral decubitus position (AP Projection)" |
Ventral decubitus position, right lateral. | Pt lying on anterior/ventral side, with right side closest to IR. "ventral decubitus position (R lateral)" |
Dorsal decubitus position, left lateral. | Pt is lying on back, left side is closest to IR. "dorsal decubitus position (L lateral)" |
Dorsal decubitus position, right lateral. | Pt is lying on back, right side closest to IR. "dorsal decubitus position (R lateral)" |
Ventral decubitus position, left lateral. | Pt lying on anterior, left side is closest to IR. "ventral decubitus position (L lateral)" |
Axial projection | Angle of the CR of 10 degrees or more along the long axis of the body or body part. |
Inferosuperior axial projection | CR enters below/inferiorly and exits above/superiorly. -Frequently performed for the shoulder and hip. |
Superoinferior axial projection | CR eneters superiorly and exits inferiorly. -may be used for a nasal bone projection |
Tangential projection | Skims a body part to project that part into profile and away from other body structures, -Knee is common. |
AP axial projection-lordotic position. Describe. | Posterior to the IR, shoulders back and lower/middle back pushed forward. The patients long axis of the body is angled, not the CR. -Specific AP chest projection for the apices of the lungs. |
Transthoracic projection | For the humerus. Going through chest (laterally) to get image on opposite side. |
Parietoacanthial/Acanthioparietal projections | CR enters the parietal bone and exits at the acanthion (junction of nose and upper lip). |
Submentovertex (SMV) / Verticosubmental (VSM) projections | CR enters below the chin/mentum, exits at the vertex/top of skull. -Used for skull and mandible. |
Valgus | Ankles bent in, feet are turned out |
Varus | Ankles bent out, feet turned in. |
Invert/inversion | Feet turned in, "pigeon toed" |