Collimation techniques for optimization of mammography image acquisition and processing

Author(s)

Ricardo Toshiyuki Irita

• Document type: Doctoral Thesis
• Press: São Carlos. , gráficos, ilustrações, tabelas.
• Institution: Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD)
• Defense date: 2003-05-16

Examining board members

Annie France Frère Slaets; Sérgio Shiguemi Furuie; Antonio Fernando Catelli Infantosi; José Carlos Teixeira de Barros Moraes; Antonio Carlos Roque da Silva Filho

• Advisor: Annie France Frère Slaets
• Field of knowledge: Engineering - Biomedical Engineering
• Indexed in: Banco de Dados Bibliográficos da USP-DEDALUS
• Location: Universidade de São Paulo. Biblioteca da Escola de Engenharia de São Carlos; EESC/TESE

Abstract

In order to improve the visualization of the small and important anatomical structures for breast cancer diagnosis and to optimize the image processing of mammograms by the computer aided diagnosis systems (CAD), a device that comes from slit technology was developed to improve the acquisition of mammograms. This device reduces the amount of scattered radiation and the focus size and it can be projected from a computational model. This model allows quantifying the value of those parameters, scattered radiation and the focus size, for any radiological system, any X-rayed soft tissue thickness and any tension applied to the X-ray tube. The device was implemented and tested quantifying the obtained improvements. The generated images were compared to the supplied for conventional mammography systems. The model was also good for studying interference on the algorithms used in the computer aided diagnosis systems (CAD). (AU)