Chapter 2: Scanning planes and Scanning Methods
Transverse plane
"Across" The ultrasound beam is entering the body from either an anterior, posterior, or lateral direction
Curved array is usually used for
Abdominal, obstetric and gynecological imaging
Focal zone
An area at which the sound beam strikes the surface of a structure, affects the image
Coronal planes divides the body into unequal _________ and _________ sections
Anterior and posterior
AP represents
Anteroposterior dimension
Pressure
Applying the correct amount of pressure with the transducer can improve image quality
The anatomic area(s) not seen in a transverse plane
Are superior and inferior
Measure
Begin by scanning as perpendicular to the structure as possible for the truest representation of its size
The ____________ of the structure being imaged ultimately determines which transducer should be used
Depths
Coronal planes
Divide the body into unequal anterior and posterior sections
When scanning in a coronal plane, the ultrasound beam enters the body from
Either a right or left lateral direction
When scanning in a sagittal, the ultrasound beam enters the body from
Either an anterior or posterior dimensional
When scanning in a transverse plane, the ultrasound beam enters the body from
Either an anterior, posterior, right/left lateral direction
Endocavital array is usually used for
Endovaginal and endorectal
When scanning, every effort should be made to position the area(s) of interest in the transducer's ______________ to obtain the best image
Focal zone
How the structure of interest lies in the body Scanning planes are not often oblique (by very slightly twisting the transducer). The degree of the oblique is determined by _____________________.
How the structure of interest lies in the body
Sector array is usually used for
Intercostal scanning
Hockey stick array is usually used for
Intraoperative imaging
The anatomic area(s) not seen in a sagittal plane
Is lateral
What is the equation to find volume?
L X W X AP = Volume
L represents
Length
Sagittal plane is also known as
Long plane
Short axis
Plan for anteroposterior views and width measurements, which are taken at a structure.s widest margins
Sagittal planes divide the body into unequal _________ and _________ sections
Right and Left
Longitudinal views
Show a structures length and depth
Transverse planes divide the body into unequal ________ and _______ sections
Superior and Inferior
What is the lithotomy position?
Supine with knees and hips flexed Typically used for giving birth, papsmire, or trans vaginal
Angle of Incidence
The angle at which the sound beam strikes the surface of a structure, affects the image
The oblique scanning plane affords visualization of the _________________.
The greatest margins of structures
Positional Orientation
The transducer verifies the scanning plane
sagittal planes
The ultrasound beam is entering the body from either an anterior or posterior direction and the anatomic portion of body structures being visualized
3D array is usually used for
Three dimensional imaging
Tee array is usually used for
Transesophageal echocardiography
What is the knee-chest position?
Variation of prone; where the patient is face down on the bed with the head turned to one side. The chest, elbows, and knees rest on the bed, and the thighs are perpendicular to the bed. The lower legs rest flat on the bed.
W represents
Width
The anatomic area(s) not seen in a coronal plane
are anterior and posterior
The lower the frequency the ________ it goes
deeper
What is Dorsal recumbent position?
flat on back knees slightly separated and flexed feet flat on bed Typically used for vaginal/rectal exam
What is sitting semi-erect?
incompletely upright in bodily posture
What is the prone position?
lying face down
What is the supine position?
lying face up
What is the left lateral decubitus (LLD)?
lying on the left side
What is the right lateral decubitus (RLD)?
lying on the right side
Long axis
maximum length of a structure can be seen in any scanning plane depending on how that structure lies in the body
What is the left posterior oblique?
performed with the body rotated 30-45 degrees away from the midline
What is the right posterior oblique?
performed with the body rotated 30-45 degrees away from the midline
axial views
show a structure's width and depth
Liner array is usually used for
small or superficial structures and extremity Doppler
Scanning planes are ______ dimensional
two
What is sitting erect?
upright in bodily posture
