Table 3.

Eight fields in radiological technology and their descriptions.

Category	Description	Example	Number
Image engineering	Terms related to imaging engineering such as image processing, image display, and image evaluation	Power spectrum, full width at half maximum, pixel, signal to noise ratio	145
Physical phenomena	Terms representing the interactions between radiation and matter related to radiological examinations, as well as associated materials and phenomena	Radioisotope, echo, free radical, decay	196
Radiation control	Terms related to radiation management such as radiation measuring instruments and dose assessment	Contamination, tracer, yield, cumulative dose	72
Equipment	Terms related to radiological examination and treatment equipment, their parts, and accessories	Grid, linac, flat　panel　detector, surface coil	168
Informatics	Terms related to information engineering and medical informatics, including statistics and analysis algorithms	Morbidity, sensitivity, decision tree, standardization	89
Diagnostic imaging	Terms related to radiographic imaging examinations, including examination methods and techniques	Coronal plane, intravenous pyelography, cardiothoracic ratio, spin echo	234
Radiation therapy	Terms related to radiation therapy, including treatment techniques	Organs at risk, brachytherapy, preventive irradiation, afterloading	51
Medicine	Terms related to basic medical sciences such as anatomy, physiology, and pathology	Estrogen, immune, cancer, complete response	74