Ultrasound Physics Textbook Notes (Chapter 1)

Flashcards covering key definitions and concepts from ultrasound physics lecture notes.

What is the function of graphs?

Graphs show information on an ultrasound screen, such as numbers, quality, and Doppler data.

What are the axes in context of graphs

Horizontal (X) and Vertical (Y)

What doe the X axis represents?

It represent time in graphs

What is the relationship between two unrelated items and give an example.

They are not associated like hair color and shoe size

What is the relationship between two related or proportional items and what is an example?

They are associated but the relationship does not have to be specific like weight and dieting

What happens when two items are directly related and what is an example?

When one item increases, the other increases like age and experience

On a graph of directly related items, does the line extend from lower left to upper right or upper left to lower right?

Lower left to upper right.

What happens when two items are inversely related and what is an example?

When one item increases, the other decreases like golf score and skill

On a graph of inversely related items, does the line extend from lower left to upper right or upper left to lower right?

Upper left to lower right.

What is a reciprocal relationship?

When reciprocals are multiplied, the result is one.

Provide an example of numbers with a reciprocal relationship.

2 and ½ are reciprocals.

Why must numerical values have corresponding units?

Units prevent ambiguity.

Give examples of length - distance or circumference units.

cm, feet

What units do we use in ultrasound?

Distance, velocity, and volume

What does 'increase by a factor' mean?

Multiply by that number.

What does 'decrease by a factor' mean?

Divide by that number.

What happens when units change?

Only the presentation of data changes.

What is the purpose of scientific or engineering notation?

Shorthand for very large or small numbers.

In scientific notation, what does a positive exponent indicate?

A value greater than 10.

In scientific notation, what does a negative exponent indicate?

A value less than 1.

In scientific notation, what does an exponent of zero indicate?

A value between 1 and 10.

What is the meaning of the prefix 'giga'?

Billion

Which direction does the x-axis run?

Side to side

What direction does the ventricular (Y) axis run

Up and down