Oncologic Radiology Glossary

High-throughput extraction of quantitative imaging features for predictive modeling.

Tissue death resulting from radiation therapy that can mimic tumor recurrence on imaging studies.

Standardized criteria for measuring tumor response to treatment in oncology imaging studies.

Tumor lesions meeting size criteria for objective response assessment under RECIST guidelines.

Systematic evaluation of tumor changes following treatment using standardized imaging criteria.

A pattern of contrast enhancement forming a ring around the periphery of a lesion on imaging studies.

Radiation Therapy Oncology Group grading system for radiation-induced normal tissue toxicity and late effects.

High-precision radiation therapy delivering ablative doses to extracranial tumors in few fractions.

Stereotactic body radiation therapy delivering high-dose radiation to extracranial targets in few fractions.

A preliminary radiographic image obtained before CT or MRI scanning to plan scan coverage and positioning.

The distance between the patient's skin surface and the radiation beam entry point, affecting dose to superficial tissue...

Hybrid imaging combining functional SPECT with anatomic CT for improved localization.

The treatment planning process for high-precision, single-fraction radiation therapy using multiple convergent beams.

The highest level of radiotracer uptake within a region of interest on PET imaging, used to quantify metabolic activity.

The average standardized uptake value measured across a region of interest on PET imaging, providing metabolic activity...

Tumor size and local extent assessment component of TNM cancer staging system.

Measurable lesion selected for quantitative monitoring in treatment response assessment protocols.

A composite PET parameter combining metabolic tumor volume and average SUV to quantify total tumor metabolic activity.

Anatomic region targeted for radiation therapy delivery, defined by radiation treatment planning.

The geometric point in space where radiation beams intersect during treatment delivery, serving as the reference for dos...

Specialized computer software used to design and optimize radiation therapy treatments, calculating dose distributions a...

Standardized criteria for evaluating treatment response in brain tumors through imaging and clinical assessment.

Immune cells present within tumor tissue, indicating host immune response activation.

Histopathologic scoring system quantifying treatment response in resected tumor specimens.