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Assessment of Treatment Response Using PET/CT Scanner - Non Hodgkin's Lymphoma

This study has been completed.
Princess Margaret Hospital, Canada
Information provided by:
University Health Network, Toronto Identifier:
First received: September 12, 2005
Last updated: August 12, 2010
Last verified: August 2010

In this study the treatment process will be closely monitored using a novel imaging technology, a PET/CT scanner. PET stands for Positron Emission Tomography and in this case it will be combined with a conventional x-ray Computerized Tomography (CT) scan. This is not a study of any particular form of treatment. The treatment you receive will be the most appropriate standard treatment whether you are in the study or not.

The goal of radiation therapy is to deliver a given amount of radiation dose to the area where there is a lymphoma tumour. We are doing this study to see which part of the tumour reacts to the radiation treatment, and which part does not react, by monitoring the progress of your treatment with a combined PET/CT scan. In particular, changes of the size and shape of the tumour that occur during the treatment can be detected and will be visible on the images. These images will be thoroughly analysed. The ability of the PET/CT scanner to detect these changes during a course of radiation treatment will be the subject of this study. We will also be able to see if this information will eventually relate to or predict whether lymphoma tumours will be completely eradicated by the treatment.

Condition Intervention Phase
Lymphoma, Non-Hodgkin
Procedure: PET Scan with [18F]Fluoro-2-deoxyglucose (FDG)
Phase 2

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
Official Title: Spatio-temporal Response of Non-Hodgkin's Lymphoma to External Beam Radiation Therapy Measuring 18F-Fluorodeoxyglucose (FDG) Uptake Using a Combined PET/CT Scanner: A Pilot Study

Resource links provided by NLM:

Further study details as provided by University Health Network, Toronto:

Primary Outcome Measures:
  • To quantify spatial and temporal treatment response to radiation therapy in patients with NHL using the co-registered CT and FDG-PET images and assess this response with temporal geometric models.

Secondary Outcome Measures:
  • To assess the feasibility to spatially correlate the abnormalities on the CT image to the FDG uptake on the co-registered PET image using the geometric models.
  • To determine if the inclusion of a GTV based upon PET images alters (1) the treatment plan based on the initial planning CT; and (2) if GTVs based on CT or PET differ for adaptive plans.
  • To assess tumor metabolic activity in non-irradiated areas, if detected, and study its temporal changes during a course of radiation treatment (abscopal response).
  • To link the concentration of the biochemical marker lactate dehydrogenase (LDH) to treatment response.

Estimated Enrollment: 10
Study Start Date: August 2005
Study Completion Date: July 2009
Primary Completion Date: July 2009 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Histologic diagnosis of NHL:Any histology
  • Stage I-IV
  • Measurable disease by CT scan (gross disease measuring at least 2 cm in any one dimension)
  • Planned radiation dose prescription >=30 gy, >=20 fractions, >=3weeks duration
  • Informed consent
  • Previous chemotherapy is allowed, provided the above eligibility criteria are me

Exclusion Criteria:

  • To minimize effect from breathing motion, patients presenting with parenchymal lung tumours and tumours involving liver and stomach will be excluded
  • Concurrent systemic chemotherapy (glucocorticoids when used alone is allowed)
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Please refer to this study by its identifier: NCT00188929

Canada, Ontario
Princess Margaret Hospital
Toronto, Ontario, Canada, M5G 2M9
Sponsors and Collaborators
University Health Network, Toronto
Princess Margaret Hospital, Canada
Principal Investigator: Richard Tsang, MD Princess Margaret Hospital, Canada
  More Information

Responsible Party: Dr. Richard Tsang, Staff Radiation Oncologist, University Health Network, Princess Margaret Hospital Identifier: NCT00188929     History of Changes
Other Study ID Numbers: UHN REB 05-0339-C
Study First Received: September 12, 2005
Last Updated: August 12, 2010

Additional relevant MeSH terms:
Lymphoma, Non-Hodgkin
Neoplasms by Histologic Type
Lymphoproliferative Disorders
Lymphatic Diseases
Immunoproliferative Disorders
Immune System Diseases
Molecular Mechanisms of Pharmacological Action
Antiviral Agents
Anti-Infective Agents processed this record on April 28, 2017