CT Perfusion Scans for Assessment of Lung Cancer Before and After Chemo +/- Radiotherapy

Study Overview
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Brief Summary
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Cancer of the lung is treated with surgery, radiation or chemotherapy, depending on the stage or extent of the disease. Some patients are treated with chemotherapy and/or radiation therapy before surgery to improve the results of surgery. After these treatments, we do not know whether the residual tumour tissue is still alive or dead, which is why some physicians feel that surgery is required to remove it. This study is designed to assess if computed tomography (CT, CAT-scan) enhanced with intravenous contrast agent (dye) can characterize a lung cancer, and say whether it is alive or dead. The researchers hope that in the future such a contrast-enhanced CAT-scan will make surgery less often necessary or improve the results of chemotherapy and/or radiation given before surgery.

Detailed Description
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The proposed study will be performed in patients with a proven lung cancer for whom induction therapy and subsequent surgical resection of any kind is planned. Kinetic analysis of dynamic contrast-enhanced CT will performed using the CT Perfusion 3 software (General Electric Medical Systems), yielding parameters characterizing tumor microvasculature in terms of the vascularity, or the blood volume (BV), the tumor perfusion or blood flow (BF), and the immaturity of the vascular wall, in terms of the microvascular permeability (permeability surface area, PS). To test the assumption that dynamic CT-assessed tumor microvascular characteristics represent reliable, user-independent and reproducible parameters, microvascular values and parameter maps will be derived from two independent observers. To address the interobserver variability, each study will be analyzed by the PI and by a second researcher (blinded to the results of the PI). Kappa-statistics will be used to assess inter-rater concordance. To test the hypothesis that the microvascular parameters obtained from dynamic contrast-enhanced CT predict the response to induction therapy, the parameters BV, BF and PS obtained prior to any treatment will be correlated with the histological result from the resected specimen (path CR or path non-CR). Spearman correlation will be used to compare non-parametric histology results with quantitative CT microvascular parameters. To test the hypothesis that the microvascular parameters obtained from dynamic contrast-enhanced CT reflect the response to induction therapy, the parameters BV, BF and PS obtained after completion of induction treatment will be correlated with the histological result from the resected specimen (path CR or path non-CR). Spearman correlation will be used to compare non-parametric histology results with quantitative CT microvascular parameters.

Official Title
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Dynamic CT Perfusion for Assessment of Lung Cancer Before and After Neoadjuvant Chemo-/ Radiotherapy

Conditions
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Non-small Cell Lung Cancer

Intervention / Treatment
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* Procedure: contrast-enhanced dynamic CT perfusion study


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: diagnosis of non-small cell lung cancer Patients who are scheduled for any neo-adjuvant treatment Exclusion Criteria: Females who are known to be pregnant or nursing Patients with a history of adverse reaction to previous contrast agent administration Patients with known renal disease

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: CT perfusion scan<br> | Procedure: contrast-enhanced dynamic CT perfusion study<br>* contrast-enhanced dynamic CT perfusion study pre treatment and post treatment<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| -Analysis will be performed to yield quantitative, absolute estimates of blood volume, blood flow, and microvascular permeability. |  | 2 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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perfusion, CT, CAT, non-small, lung