DACBR - independent subject foundations flashcards

20 cards. Read the term and the definition here. The deck at the top of this page is optional.

Differential diagnosis

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

Mass effect

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

Restricted diffusion

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

Extra-axial

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

Enhancement

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

Transition point

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

Washout

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

Marrow edema pattern

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.

Matrix

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

Periosteal reaction

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

Physeal fracture

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

Infiltration

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

Sacroiliitis

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

Traction bronchiectasis

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

Ground-glass opacity

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

Atelectasis

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

Reporting category

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

Diagnostic uncertainty

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

Clinical correlation

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

Pattern recognition

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