Egyptian Board Diagnostic Radiology - independent subject foundations key terms

A reasoned set of possible explanations for the observed pattern, narrowed using anatomy, clinical information and appropriate additional evidence rather than one sign alone.

Displacement or compression of adjacent structures by an abnormal process, evaluated with location, extent and relevant clinical urgency rather than a histological label alone.

A diffusion-related imaging pattern assessed with appropriate diffusion and ADC information, not established from bright diffusion-weighted signal alone.

Located outside the brain parenchyma within the relevant intracranial compartment, helping organize a differential without independently proving a histological diagnosis.

A change related to contrast behavior in the specified acquisition, interpreted using the actual phase, method, tissue and comparison rather than one timing label.

The location of a change in bowel caliber or configuration relevant to obstruction assessment, interpreted with wall, mesenteric and clinical findings.

A contrast-related change calculated or described using specified phases and assumptions, which is not a universal independent proof of lesion benignity.

An MRI signal pattern indicating altered tissue water behavior in context, with possible causes including injury and other processes rather than a single guaranteed age of fracture.

Material produced within a lesion whose mineralization appearance can contribute to a bone-tumor differential alongside age, location, margins and other features.

A pattern of new bone response along the periosteum, interpreted with its morphology and clinical setting rather than as proof of one tumor.

A fracture involving the growth plate, whose classification depends on the actual involvement of adjacent metaphyseal or epiphyseal structures.

Replacement or involvement of tissue by an abnormal process, requiring interpretation with other findings rather than automatic classification of every low signal as malignancy.

Inflammatory involvement of the sacroiliac joints, interpreted with distribution, other imaging and clinical conditions such as related spondyloarthropathy.

Bronchial dilatation associated with pulling or distortion by surrounding parenchymal disease, contributing to assessment of a fibrotic pattern in context.

Increased pulmonary attenuation through which underlying structures remain visible, with several possible causes requiring distribution and clinical interpretation.

Reduced aeration with volume loss in the affected lung region, assessed through direct and indirect findings rather than any opacity alone.

An assessment within a named and version-specific reporting framework, distinct from histology and dependent on the applicable population and imaging features.

The limits of what the current observations and clinical context establish, which should be communicated clearly without erasing a supported urgent concern.

Integration of imaging with relevant history, examination, laboratory or other evidence, not a formula used to avoid describing the actual imaging finding.

Use of a constellation of features to support an interpretation, while checking atypical findings, alternatives and whether the underlying assumptions apply.