Clinical trial · Observational
Tumor Motion Management in Radiotherapy Using 4D-MRI
Evaluation of Tumor Motion Management Strategies in Radiotherapy Using 4D-MRI
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
The main goal of this research is to characterize patient-specific respiration-induced tumor and surrogate motion to evaluate the accuracy and effectiveness of the surrogate-based motion management strategies currently used in clinics. Specifically, the investigators hypothesize that dynamic MRI (Magnetic Resonance Imaging) obtained over a temporal duration consistent with radiotherapy treatments will provide spatio-temporal information of both the tumor and surrogate, and therefore can serve as a means to assess the quality of the tumor motion tracking with the surrogate. To test this hypothesis, the investigators specifically propose to 1) track and characterize the tumor and surrogate motion with 4D (4 dimensional)-MRI and 2) evaluate surrogate-based motion tracking in a cohort of patients with thoracic tumors. External and internal surrogate-based strategies commonly used in clinics have not been appropriately validated. With the increasing adaptation of these surrogate methods for motion management, the proposed research addresses these urgent issues in clinical radiotherapy while providing a means to achieve patient-specific motion management.
Conditions
Conditions (1)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Cancer | Malignant Neoplasm | ALIAS | 0.90 |
Interventions
Interventions (0)
Data not yet available
Design
Arms and outcomes
Arms (0)
[]Primary outcomes (1)
- measure
- Tumor motion characterization during radiation therapy
- timeFrame
- 1 year
- description
- To characterize patient-specific respiration-induced tumor and surrogate motion to evaluate the accuracy and effectiveness of the surrogate-based motion management strategies currently used in radiotherapy.
Secondary outcomes (3)
- measure
- Correlation of tumor and surrogate motion
- timeFrame
- 1 year
- description
- Tumor and surrogate motion will be quantified by measuring the displacements from their end-exhale positions. Since the tumor may deform during motion, we will not only consider the trajectories of the center of mass but also the tumor borders. The tumor position as a function of the surrogate position will be analyzed along each moving direction. Pearson correlation coefficients and the sum of squared residual errors based on a regression analysis will be computed to provide a quantitative measure of the correlation between the surrogate and tumor positions. To measure the tumor deformation, correlations of the motion between the SI borders, AP borders, LR borders will also be computed. Although lung tumor likely does not significantly deform, this analysis will be useful for tumors that may deform significantly during motion. The motion under the different breathing patterns will be analyzed separately, and compared to each other.
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
- Maximum age
- 100 Years
Show eligibility criteria text
Inclusion Criteria: * Histologically-confirmed primary lung cancer (non-small cell OR small cell) * Plan to undergo external radiation treatment of lung cancer Exclusion Criteria: * Patients who cannot undergo MRIs. * Patients who have a cardiac device or other electronic or metal implant
References
Publications (0)
Data not yet available