sono physixs ..

Introduction to Scanning Images

  • As you scan, you gain information that can be represented in a graph format.

  • The session is not strictly a math class, but some basic math concepts will be introduced.

Understanding Axes in Graphs

Axes Definitions

  • Horizontal Axis (X-axis): Represents the horizontal line in a graph.

    • Another name for the horizontal axis is the X-axis.

  • Vertical Axis (Y-axis): Represents the vertical line in a graph.

    • Another name for the vertical axis is the Y-axis.

Application in Scanning

  • During scanning (e.g., of the heart or blood vessels), images come with tick marks indicating measurements.

  • Y-axis in Scanning: Represents depth. Each tick mark equals a centimeter.

  • X-axis in Scanning (Spectral Waveforms): Represents time.

    • In echocardiography, this axis can cover different time spans depending on the sweep speed (e.g., 3 seconds, 5 seconds).

Relationships in Scanning

Independent Relationships

  • Two unrelated things do not affect each other.

    • Example: My name (Lisa) and favorite colors (pink and blue).

Directly Related Relationships

  • Directly related means there is a correlation; when one increases, so does the other.

    • Example: More studying leads to higher grades.

    • More practice in the lab scanning increases muscle memory and improves performance.

Exercise and Health Examples

  • Sleep: More sleep leads to feeling more refreshed.

  • Exercise: The more you exercise, the more weight you potentially lose.

Proportional Relationships

  • The term proportional is used in defining relationships but can be confusing.

    • Directly proportional means similar behavior (one increases as the other increases).

    • Inversely proportional means oppositional behavior (one increases while the other decreases).

Clarification of Terms

  • There is confusion in the textbook definition of proportional relationships.

  • Directly Proportional: Same as directly related (e.g., power and intensity).

  • Inversely Related: When one item increases, the other decreases evenly.

    • Example: Healthier eating leads to smaller waist size.

    • Another Example: More partying correlates with lower grades.

Conclusion

  • The nuances of relationships and graph representations in scanning will be essential as we advance through upcoming chapters.