Elimination of PTV Margins Based on Online Adaptive Stereotactic Radiotherapy for Centrally Located Early-stage Non-small Cell Lung Cancer

Sun Yat-sen University

Status and phase: Enrolling; Phase 2

Conditions: Lung Cancer (NSCLC)

Treatments: Radiation: Online adaptive SBRT

Study type: Interventional

Funder types: Other

Identifiers

NCT06730295

GASTO-10122

Details and patient eligibility

About

This study aims to explore the safety and efficacy of eliminating the PTV (planning target volume) margins based on online adaptive stereotactic radiotherapy for patients with centrally located early-stage non-small cell lung cancer (NSCLC).

Enrollment: 52 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Histologically confirmed untreated early-stage non-small cell lung cancer (T1-2N0M0), or recurrent disease (rT1-2N0M0) that is inoperable or where the patient is unwilling to undergo surgery.
• Centrally located lung cancer.
• Age 18 years or older, regardless of gender.
• ECOG performance status score of 0-2.
• Serum hemoglobin ≥ 80 g/L, platelets ≥ 100,000/μL, absolute neutrophil count ≥ 1,500/μL.
• Serum creatinine ≤ 1.25 times the upper normal limit (UNL) or creatinine clearance ≥ 60 ml/min.
• Serum bilirubin ≤ 1.5 times UNL, AST (SGOT) and ALT (SGPT) ≤ 2.5 times UNL, alkaline phosphatase ≤ 5 times UNL.
• FEV1 ≥ 0.5 L.
• Normal CB6 range.
• The patient and their family agree and sign the informed consent form.

Exclusion criteria

• Any other disease or condition that contraindicates radiotherapy (e.g., active infections, within 6 months post-myocardial infarction, symptomatic heart disease including unstable angina, congestive heart failure, or uncontrolled arrhythmias).
• Pregnant or breastfeeding women, women who have not undergone pregnancy testing, and pregnant individuals.
• Individuals with substance abuse issues, chronic alcoholism, or AIDS.
• Individuals with uncontrollable seizures or loss of self-control due to psychiatric disorders.
• Individuals with a history of severe allergies or specific sensitivities.

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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52 participants in 1 patient group

The study group

Experimental group

Description:

Patients in the study group will receive online adaptive stereotactic body radiotherapy (without PTV expansion margin). The total dose will be 39-42Gy/3fractions, administered once daily. Both FBCT and 4DCT will be acquired before initiating treatment at each fraction.

Treatment:

Radiation: Online adaptive SBRT