Name two imaging modalities that Radiant commonly references for localization data.

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Multiple Choice

Name two imaging modalities that Radiant commonly references for localization data.

Localization data in Radiant is built on CT-based imaging, because it provides accurate 3D anatomy paired with electron-density information needed for dose calculations. A CT simulation scan is acquired specifically for planning: it defines target volumes, organs at risk, and supplies the data used to calculate how the prescribed dose will spread through the body. Cone-beam CT (CBCT) is used on the treatment unit to verify daily anatomy and positioning, allowing alignment corrections before each fraction so the plan conforms to the patient’s actual setup. Other imaging modalities offer valuable information for planning and contouring—MRI and PET give excellent soft-tissue contrast and metabolic detail, but they don’t provide the electron-density data needed for dose calculations, and they’re usually used in conjunction with CT rather than as the primary localization source. Ultrasound, X-ray, fluoroscopy, and SPECT can aid in specific scenarios, but they don’t deliver the reliable three-dimensional localization data used routinely for planning and daily setup.

Localization data in Radiant is built on CT-based imaging, because it provides accurate 3D anatomy paired with electron-density information needed for dose calculations. A CT simulation scan is acquired specifically for planning: it defines target volumes, organs at risk, and supplies the data used to calculate how the prescribed dose will spread through the body. Cone-beam CT (CBCT) is used on the treatment unit to verify daily anatomy and positioning, allowing alignment corrections before each fraction so the plan conforms to the patient’s actual setup.

Other imaging modalities offer valuable information for planning and contouring—MRI and PET give excellent soft-tissue contrast and metabolic detail, but they don’t provide the electron-density data needed for dose calculations, and they’re usually used in conjunction with CT rather than as the primary localization source. Ultrasound, X-ray, fluoroscopy, and SPECT can aid in specific scenarios, but they don’t deliver the reliable three-dimensional localization data used routinely for planning and daily setup.

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