Ch. 1: The Basics Flashcards
In diagnostic ultrasound, information is often displayed in what form?
graphical form
The two axes (lines) used with all graphs have special names:
x-axis and y-axis
The x-axis is a (1) ____ line and runs (2) ____ to (3) ____
- horizontal
- side
- side
The y-axis is a (1) ____ line and runs (2) ____ and (3) ____
- vertical
- up
- down
Variable means:
Change
Unrelated: (Meaning)
Two items that are not associated
Unrelated: (Examples)
- Hair color is unrelated to shoe size
- Weight is unrelated to day of birth
- Temperature is unrelated to day of the week
Directly related, or directly proportional: (Meaning)
- Two items that are associated such that when one item increases, the other increases
(When X increases, Y increases)
Directly related, or directly proportional: (Examples)
- Clothing size is directly proportional to one’s weight
- Age is directly related to experience
- Skill is directly related to practice
- Quality of wine is directly proportional to age
The graph of two directly related items extends from (1) ____ ____ to (2) ____ ____
(1) lower left
(2) upper right
Related, or proportional: (Meaning)
Two items that are associated or affiliated
(The relationship between the items does not have to be specified)
Related, or proportional: (Examples)
- Weight is related to dieting
- Santa is related to Christmas
- Exam score is related to or proportional to studying
- Dental health is related to flossing
Inversely related, or inversely proportional: (Meaning)
Two items are associated such that when one item increases, the other decreases
The graph of the two inversely related items extends from the (1) ____ ____ to the (2) ____ ____
(1) upper left
(2) lower right
Inversely related, or inversely proportional: (Examples:)
- Golf score is inversely related to skill
- A car’s gas mileage is inversely proportional to its engine size
- Grades in school are inversely proportional to partying time
Reciprocal relationship: (Meaning)
When two numbers with a reciprocal relationship are multiplied together, the result is one
____ ____ is a special form of inverse relationship
(1) Reciprocal relationship
(Reciprocal numbers are inverse because when one increases, the other decreases)
Reciprocal relationship: (Examples)
- 2 and ½ are reciprocals
- 10 and ⅒ are reciprocals
- Period and frequency are reciprocals
All numerical values must have corresponding ____
units
A number alone, without units, is ambiguous and can create ____
uncertainty
For a numerical answer to a question to be comprehensive, it requires a ____
unit
Units of length—
Linear distance or circumference: cm, feet
- One dimensional
Units of area—
cm², ft² (Length x Width)
- Two dimensional
Units of volume—
cm³, ft³ (Length x Width x Height)
- Three dimensional