Oncologic Radiology Glossary

A quantitative measurement from diffusion-weighted imaging that reflects tissue cellularity and membrane integrity.

Quantitative parameter measuring water molecule diffusion restriction in diffusion-weighted imaging.

Early contrast enhancement pattern occurring 20-30 seconds post-injection, indicating high vascularity.

Image processing technique compensating for photon absorption in PET imaging.

Mathematical model comparing biological effectiveness of different radiation fractionation schemes.

Tissue-equivalent material placed on the patient's skin surface to modify radiation dose distribution and improve target...

Radiation therapy technique involving placement of radioactive sources directly into or adjacent to tumor tissue for loc...

The maximum radiation dose that brainstem tissue can safely receive without significant risk of permanent neurologic inj...

The radiation dose delivered along the central beam axis, serving as a reference point for dose calculations and field a...

Contrast-enhanced ultrasound using microbubble agents to improve tissue characterization and blood flow assessment.

DNA fragments released by tumor cells into the bloodstream, detectable through liquid biopsy techniques.

Treatment approach combining simultaneous delivery of chemotherapy and radiation therapy.

A volumetric imaging technique using a cone-shaped X-ray beam to verify patient positioning and anatomy during radiation...

A focal area of contrast enhancement that appears as a small, bright spot, often indicating active bleeding or hypervasc...

Leakage of contrast material outside blood vessels into surrounding tissues during imaging procedures.

Temporal pattern of contrast agent uptake and clearance in tissues during dynamic imaging.

Standardized severity classification system for adverse events in cancer treatment.

CT Dose Index; a standardized measure of radiation dose output from CT scanners used to monitor patient radiation exposu...

Geometric margin added to clinical target volume to account for setup uncertainties and organ motion.

Digital Imaging and Communications in Medicine; the international standard for medical image storage, transmission, and...

Dose Length Product; a measure of total radiation exposure that accounts for both dose intensity and scan length in CT i...

Predetermined radiation dose limits for organs at risk to minimize normal tissue complications during treatment planning...

Quantitative evaluation of radiation dose distribution to target volumes and normal tissues in treatment planning.

Diffusion-weighted imaging technique that measures water molecule movement to detect cellular density changes.