Investigating National Solutions for Personalised Iodine-131 Radiation Exposure

NCT ID: NCT04391244

Last Updated: 2023-08-18

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Total Enrollment

150 participants

Study Classification

OBSERVATIONAL

Study Start Date

2020-06-17

Study Completion Date

2025-03-31

Brief Summary

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This is a single-arm non-interventional prospective observational study to perform quantitative I-131 imaging and patient-specific dosimetry for patients undergoing radioiodine treatment.

Detailed Description

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The hypothesis underlying this study is that treatment outcome in molecular radiotherapy is dependent on the absorbed doses delivered rather than on the radioactivity administered. For up to 50 patients, post treatment dosimetry will be performed to establish the range of absorbed doses and associated uncertainties delivered to thyroid remnants, residual disease, and healthy organs from an ablative administration of I-131 radioiodine.

Imaging systems in participating centres will be characterised (system volume sensitivity, partial-volume effect and dead-time) and set up for quantitative imaging to allow for collation of data. Patients will be assigned to one of two dosimetry gamma camera scanning schedules. For scanning schedule 1 (Standard of Care) a single standard-of-care scan (SPECT/CT) will be acquired according to local protocol with regards to time post-radioiodine administration. A minimum of 20 patients will be assigned to scanning schedule 2 (Standard of Care + Additional Imaging), for which a standard-of-care scan and two to four additional SPECT scans will be acquired between 6 - 168 hours post-administration.

SPECT imaging datasets will be reconstructed with attenuation and scatter corrections to allow quantitative dosimetry calculations. Time integrated activity will be derived from analysis of the quantitative SPECT data and combined with relevant dose factors to obtain absorbed dose estimates for each target tissue. The subset of patients with additional imaging will be used to establish the pharmacokinetic properties of radioiodine in each tissue type (biological retention half-life) to enable determination of time integrated activity in patients with a single standard-of-care scan.

A minimum of 3 whole-body retention measurements will be performed per day during the patient's stay in hospital, approximately every 2-6 hours, according to local standard of care procedures. At each external measurement time point the quantified level of radioactivity in the whole body will be recorded.

Patients will be followed-up at their standard-of-care clinic visits to assess the success of treatment as well as for short to mid-term toxicity. Results from standard of care biochemical, radiological and haematological assessments (TSH, thyroglobulin, anti-thyroglobulin antibodies, ultrasound, serum creatinine, haemoglobin, white cell count, neutrophil count and platelet count) will be recorded to assess response to treatment. Statistical analysis of the relationship between the absorbed doses and outcome data will be performed.

Conditions

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Differentiated Thyroid Cancer

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Eligibility Criteria

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Inclusion Criteria

* Written informed consent
* Histologically proven DTC (pT1b - pT3, any N, any M)
* Total thyroidectomy performed
* WHO PS 0-2 (autonomous, self-caring)

Exclusion Criteria

* External radiotherapy in the last 6 weeks
* Systematic chemotherapy in the last 6 weeks
* Pregnancy or breast feeding
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Royal Marsden NHS Foundation Trust

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Kate Newbold

Role: STUDY_CHAIR

Consultant Clinical Oncologist

Glenn Flux

Role: PRINCIPAL_INVESTIGATOR

Head of Radioisotope Physics

Locations

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The Royal Marsden NHS Foundation Trust

Sutton, Surrey, United Kingdom

Site Status RECRUITING

Countries

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United Kingdom

Central Contacts

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Yvonne Fox-Miller

Role: CONTACT

020 86613760

Jan Taprogge

Role: CONTACT

020 8661 3086

Facility Contacts

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Yvonne Fox-Miller

Role: primary

020 8661 3760

Jan Taprogge

Role: backup

020 8661 3086

References

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Taprogge J, Abreu C, Vavrova L, Carnegie-Peake L, Rushforth D, Gape P, Gear J, Murray I, Wong KH, Newbold K, Yusuf S, Flux G. Initial results of the INSPIRE clinical trial-investigating radiation dosimetry for differentiated thyroid cancer patients. Front Nucl Med. 2023 May 15;3:964478. doi: 10.3389/fnume.2023.964478. eCollection 2023.

Reference Type DERIVED
PMID: 39380954 (View on PubMed)

Other Identifiers

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20/EM/0022

Identifier Type: OTHER

Identifier Source: secondary_id

CCR5109

Identifier Type: -

Identifier Source: org_study_id

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