Photon Interaction Coefficients for the Colorectal Cancer Tissue.

Purpose: The application of radiotherapy to the treatment of cancer requires the knowledge of photon interaction coefficients such as mass attenuation (μ) and mass energy-absorption coefficients (μ/ρ). Although these coefficients have been determined for different tissues, it is lacking for the colorectal cancer (CRC) tissue in the literature. This study determines the μ and μ/ρ for the CRC tissue within the radiotherapy energy range.

Exposure index in digital radiography: initial results of awareness and knowledge from Nigerian digital radiography practices.

Introduction: Exposure Index (EI) is incorporated into Digital Radiography (DR) systems to indicate incorrect exposure to enable matching exposure to the desired speed class of operation. However, knowledge of the utilization of EI by radiographers in a low-income country has not been investigated.

Methods: A pre-tested questionnaire designed using Google forms, with open and close-ended questions was shared online with radiographers working with DR systems in public and private health facilities in some cities located in southern Nigeria.

Pediatric radiography entrance doses for some routine procedures in three hospitals within eastern Nigeria.

A survey of the entrance surface doses in the routine radiography of children in eastern Nigeria has been carried out in three hospitals, using thermoluminescence detectors. Chest, abdomen, lumbar spine, skull and pelvis were covered in this study. Findings reveal that doses are higher than the recommended reference values elsewhere, as well as values reported for Sudan.