Biomaterial Database

A digital image processing system for high energy X-ray portal images. 1984

J Leong

The technique of conventional digital image processing is applied to high energy X-ray portal films. The system, which does not use state-of-the-art equipment, is analysed to determine its adequacy for such applications. Although inferior to film, notably in spatial resolution, it is found to be useful in the improvement of radiotherapy portal films.

UI	MeSH Term	Description	Entries
D011856	Radiographic Image Enhancement	Improvement in the quality of an x-ray image by use of an intensifying screen, tube, or filter and by optimum exposure techniques. Digital processing methods are often employed.	Digital Radiography,Image Enhancement, Radiographic,Radiography, Digital,Enhancement, Radiographic Image,Enhancements, Radiographic Image,Image Enhancements, Radiographic,Radiographic Image Enhancements
D011882	Radiotherapy, High-Energy	Radiotherapy using high-energy (megavolt or higher) ionizing radiation. Types of radiation include gamma rays, produced by a radioisotope within a teletherapy unit; x-rays, electrons, protons, alpha particles (helium ions) and heavy charged ions, produced by particle acceleration; and neutrons and pi-mesons (pions), produced as secondary particles following bombardment of a target with a primary particle.	Megavolt Radiotherapy,High-Energy Radiotherapy,Radiotherapy, Megavolt,High Energy Radiotherapy,Radiotherapy, High Energy
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000703	Analog-Digital Conversion	The process of converting analog data to discrete, digital form.	Analogue-Digital Conversion,Analog Digital Conversion,Analog-Digital Conversions,Analogue Digital Conversion,Analogue-Digital Conversions,Conversion, Analog-Digital,Conversion, Analogue-Digital,Conversions, Analog-Digital,Conversions, Analogue-Digital