Chapter 1 Radiographic Positioning and Anatomy Part 2 Flashcards
Define Supine
- lying on back
- facing upwards
define Prone
- lying on the abdomen
- facing downwards
define Erect
- upright position
- standing or sitting
define Recumbent
- lying down in any position
- prone, supine, or on the side
define Dorsal Recumbent
- lying on back
- supine
define Ventral Recumbent
- lying face down
- prone
define lateral recumbent
- lying on the side
- right or left lateral
define Trendelenburg
- recumbent position
- tilted
- head lower than the feet
define Fowler’s/Reverse Trendelenburg
- recumbent position
- tilted
- head higher than the feet
define Sims position
- recumbent oblique
- lying on the left anterior side
- right knee and thigh flexed
- left arm extended down behind the back
define Lithotomy
- a recumbent (supine)
- hip flexed
- knees and thigh abducted
- rotated externally
- supported by ankle supports
when are lithotomy positions used?
the lithotomy position is used in surgical sites when dealing with urinary studies
define position
refer to a specific body position described by the body part closest to the IR (imaging radiation) or by the surface on which the patient is lying (decubitus)
define lateral position
- refers to the side of or a side view
define right lateral
- the right side of the body closest to the IR
- erect position
define an oblique position
- an angled position
define specific lateral position
- the body that is closest to the IR
- body part from which the CR exists
what factors make a true lateral position?
- always 90 degrees
- perpendicular
- right angle
- true AP or PA
define LPO
- left posteriori oblique
- can be both erect or recumbent
define RPO
- right posterior oblique
- can be both erect or recumbent
define LAO
- left anterior oblique
define RAO
- right anterior oblique
define decubitus
- to lie down
- always performed with a CR horizontal
- dorsal
- ventral
- lateral
what is the decubitus position used for?
- detecting air fluid
- free air in the body cavity
- detected in the abdomen or chest
- usually performed if the patient cannot be erect
define left lateral decubitus
- laying on your left side
- the beam is shot horizontally (stomach or back)
define right lateral decubitus
- laying down on your right side
- the beam is shot horizontally
define dorsal decubitus
- laying down, face up (supine)
- the beam is shot horizontally (hip/side)
define ventral decubitus
- laying down, face down (prone)
- the beam is shot horizontally (hip/side)
define projections
- positioning term that describes the direction or path of the CR of the X-ray beam as it passes through the patient
- how the procedure is performed
define PA projection
- also known as posteroanterior
- posterior to anterior
- the CR enters the posterior surface
- exists in the anterior surface
define a true PA projection
- the CR is perpendicular to the coronal plane
- the CR is parallel to the saggital plane
- no rotation, unless it’s an oblique projection
define AP projection
- anteroposterior
- anterior to posterior
- the CR enters the anterior surface
- exists the posterior surface
define a true AP projection
- no rotation, unless it’s described as an oblique projection
define AP oblique projection
- not a true AP projection
- it must include the positioning (medial or lateral rotation)
- CR enters the anterior surface
- CR exits the posterior surface
- Ex.) on the foot, it enters through the dorsum of the foot (top of the foot), and exits through the plantar
define PA oblique projection
- not a true PA projection
- must include the positioning (medial or lateral rotation)
- CR enters the posterior surface
- CR exits the anterior surface
- Ex.) in the hand, it enters in the dorsum (behind the palm) and exits through the palmar
define mediolateral projection
- determined in anatomical position
- CR enters in the medial surface
- CR exits the lateral surface
define lateromedial projection
- determined in anatomical position
- CR enters the lateral surface
- CR exits the medial surface
define Axial projection
- directed to, or parallel to, the long axis of the body or part
- angled
define inferosuperior axial projection
- performed for the shoulder or hip
- CR enters through the inferior surface
- CR exits through the superior surface
define superoinferior axial projection
- performed for the nasal bone
- CR enters the superior surface
- CR exits the inferior surface
define tangential projection
- touching a curve or surface at only one point
- CR skims the body part
- avoids the bigger picture, looks only for the little details
- Ex.) zygomatic bone or patella
define AP lordotic position
- AP axial chest projection
- the long axis of the body is angled
- curvature of the cervical and lumbar spine
- torso is curved forward
define transthoracic lateral projection
- lateral projection through the thorax
- requires a positioning (right or left lateral)
- examines the shoulder
- right or left transthoracic lateral shoulder
- CR passes through the thorax
define dorsoplantar
- also known as DP
- CR from the dorsal (anterior) surface to the plantar (posterior) surface of the foot
define plantodorsal
- also known as PD
- CR enters the plantar (posterior) surface to the dorsal (anterior) surface
define the parietocanthial projection
- CR enters the cranial parietal bone
- CR exits the acanthion (between the nose and upper lip)
- also known as PA waters
define acanthioparietal projection
- CR enters the acanthion (between the nose and the upper lip)
- CR exists the cranial parietal bone
- also known as AP waters
What is another name for parietocanthial projection?
- PA waters
- used to visualize the facial bones
what is another name for acanthioparietal projection?
- AP waters
- used to visualize the facial bones
define submentovertical
- also known as SMV
- CR enters the below the chin/mentum
- CR exits at the vertex or top of the skull