Introduction to Radiology

Lab Objectives

Distinguish the 5 basic radiographic densities seen on conventional radiographs.
Recognize the significance of the Hounsfield unit (HU) on CT scan.
Distinguish solid versus cystic masses on ultrasound.
Identify the difference between basic MRI sequences (T1 vs T2 weighted).

Lecture List

Introduction to Conventional Radiography, Introduction to Computed Tomography, Introduction to Ultrasound, Introduction to Magnetic Resonance Imaging

Introduction to Conventional Radiography

Introduction to Conventional Radiography Gallery

1.1a Conventional Radiography – 5 basic densities
1.1b) Conventional abdominal x-ray showing the five radiographic densities
1.1c) Side by side comparison of PA and AP views of chest

Introduction to Computed Tomography

Introduction to Computed Tomography Gallery

2.1a) CT – Hounsfield Unit
2.1b) CT – Hounsfield Unit Table
2.1c) Window width/level = allows to adjust contrast levels
2.1c) Window width/level = allows to adjust contrast levels

Introduction to Ultrasound

Introduction to Ultrasound Gallery

3.1a) Sound travels differently in different structures
3.1b) Ultrasound orientation
3.1c) Comparing linear and curved transducer
3.1d) Ultrasound imaging contrasts
3.1e) Cystic vs. solid masses

Introduction to Magnetic Resonance Imaging

Introduction to Magnetic Resonance Imaging Gallery

4.1a) MRI Outline
4.1b) T1 vs T2 weighted
4.1c) T2 vs. T2 with fat-saturation
4.1d) T1 vs. T1 with fat-saturation
4.1e) T1 with fat-saturation vs T1 with fat-saturation, post intravenous contrast
4.1f) Differentiating MRI from CT imaging
4.1g) Differentiating MRI from CT imaging
4.1h) MRI: Summary