Related Experiment Video
Updated: Aug 6, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
Published on: September 11, 2011
Perceptual and signal detection factors in radiography
1Department of Radiography and Imaging Sciences, St Martin's College, Lancaster LA1 3JD, UK.
Abstract:
Diagnostic imaging systems (e.g. X-rays and ultrasound) play an important role in medicine. Owing to increasing workloads now carried by clinical radiologists, the interpretation of medical images is increasingly being passed to radiographers. This is especially so in those areas of diagnoses where examinations are performed on large numbers of patients but when the frequency of the disorder is very low (e.g. mass mammography screening). This study explored the accuracy of the radiographic interpretation of pulmonary nodules by clinical radiologists and student radiographers, and their correlations with tests of field-dependency, visual search and spatial reasoning. Overall performance in lung nodule detection gave a mean ROC (Az)=0.851 for student radiographers, while radiologists achieved 0.871. No correlation was found between diagnostic performance and either fielddependency or visual search. A significant negative correlation was found between diagnostic performance and spatial reasoning (p < 0.05).
Related Concept Videos
Biological Effects of Radiation
X-ray Imaging
Determination of Crystal Structures
Radiological Investigation I: X-ray and CT
Factors Affecting Perception
An illustrative example of a perceptual set is the scenario where an airline pilot told...
Imaging Studies for Cardiovascular System III: X-Ray
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...

