Introduction to Scanning and Ultrasound Flashcards
Which anatomic plane splits the body into right and left sides?
Sagittal
Which anatomic plane divides the body into superior and inferior portions?
Transverse
Which anatomic plane divides the body into anterior and posterior portions?
Coronal
In the sagittal scanning plane, what portion of the patient is on the right side of the monitor? On the left side?
Inferior; Superior
In the transverse scanning plane, the patient’s right is located where on the monitor?
Left side of the monitor
In the coronal plane, the lateral portion of the patient is located where on the monitor?
top of the monitor
Diagnostic ultrasound uses frequencies above ___________.
1 MHz; 1,000,000 Hz
Describe the appearance of an anechoic structure.
- Well defined borders
- no internal echoes
If a structure is anechoic, the structure is _____________ and transmits sound ________.
Fluid-filled; easily
An echogenic structure appears ____________, because it ___________.
Brighter; produces high level echoes
An echopenic structure appears __________ because it __________.
Darker (dark grey); produces low level echoes
A structure is considered __________ when it is similar in echogenicity to surrounding tissue.
isoechoic
When comparing an echogenic structure to an echopenic structure, you would say it is __________ compared to that structure.
Hyperechoic
When comparing an echopenic structure to an echogenic structure, you would say it is __________ compared to that structure.
Hypoechoic
________ means uniform in texture/composition
Homogenous
________ means notuniform in texture/composition
Inhomogenous or heterogenous
When does shadowing occur?
When the sound wave is completely reflected or absorbed by the structure
Shadowing indicates that a structure is __________.
Dense
What artifact indicates a dense structure?
Shadowing
What artifact occurs when the sound beam travels through fluid?
Posterior enhancement/through transmission
Describe the “flash light effect”.
Echoes behind the fluid are exaggerated or brighter when the sound beam travels through fluid.
What is measured in the sagittal plane?
Length and thickness
What is measured in the transverse plane?
Width
