This document outlines the study objectives for understanding the basics of emergency radiology. It will cover the basic physics of imaging modalities like plain radiography, ultrasound and CT scans. It will discuss the advantages and limitations of each modality as well as basic rules for requesting radiology exams. It will also cover principles of picture archiving systems and current and future trends in radiology. The document then begins discussing the basics of plain film radiography, explaining how it uses x-rays to create 2D images projected on a screen from a 3D object.

1. Emergency Radiology:
The Basics
Rathachai Kaewlai, MD
www.RadiologyInThai.com
Created: November 2006
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2. Study Objectives
 After studying, the readers should be knowledgeable of
 Basic physics of different imaging modality, especially plain
radiography, US and CT.
 Advantages and limitations of each modality.
 Basic rules in requesting radiology examinations.
 Basic principle of picture archiving communication systems
(PACS).
 Current and future trends in radiology.
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