Summary
The notes outline the fundamental principles and various applications of X-ray diagnostics and therapeutic techniques. They detail the interaction of X-ray beams with different tissue densities and compositions, the use of X-rays in diagnostic methods like radiography, fluoroscopy, and computed tomography (CT), as well as therapeutic approaches including external beam radiation therapy and brachytherapy. Additionally, considerations regarding the benefits, risks, and safety measures necessary for both patients and healthcare workers are discussed to ensure optimal use and minimize potential hazards of radiation exposure.
Principle of X-ray Diagnostics
Fundamental Principle: X-rays penetrate the body with absorption varying by tissue density, allowing for internal visualization.
Use of Lead Shielding: Essential for protecting patients and healthcare workers from unnecessary radiation exposure due to its high density and effectiveness in absorbing X-rays.
X-ray Diagnostic Methods
Radiography: Produces static images by transmitting X-rays through the body to capture varying absorption levels on a detector or film.
Fluoroscopy: Offers real-time moving images, used to monitor organ function and dynamic processes within the body.
Computed Tomography (CT):
Scanning Phase: Multiple X-ray beams rotate around the body, capturing data from various angles.
Reconstruction Phase: Computer processing of data to produce cross-sectional digital images.
Digital-Analog Conversion Phase: Conversion of digital images into analog format for clinical evaluation.