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A Pilot Study Using Magnetic Resonance (MR) to Assess Cervix Motion During Radiotherapy Treatment. (MR Cervix)

1 augusti 2019 uppdaterad av: Sally Falk, The Christie NHS Foundation Trust

The standard treatment for locally advanced cervical cancer is concurrent chemo-radiotherapy. This treatment is associated with long term side effects in around half of patients with up to 10% suffering from grade 3-4 toxicity.

The development of intensity modulated radiotherapy (IMRT) allows for shaping of radiotherapy fields to reduce the doses delivered to organs at risk (OARs). This does appear to reduce the risk of long and short term toxicity (although there is little randomized evidence). However pelvic organ position varies both between and even during radiotherapy fractions; this means that radiotherapy margins must be generous to allow adequate coverage of the clinical target volume (CTV) but this also increases dose to OARs.

There have been a number of studies evaluating pelvic organ motion in cervical cancer as well as assessing different adaptive radiotherapy strategies. These have included individualized margins, plan of the day and adaptive techniques. Most of these studies have been carried out using cone beam computed tomography (CBCT) imaging which is often poor quality with limited soft tissue contrast. MR offers better visualization of the tumour and OARs and is used for imaged guided brachytherapy treatment.

This study will explore the role of MR imaging in adaptive radiotherapy for cervical cancer with development of a number of theoretical treatment strategies.

Studieöversikt

Status

Avslutad

Betingelser

Intervention / Behandling

Detaljerad beskrivning

Patients will undergo standard treatment during the study with five weeks of external beam radiotherapy (25 fractions) followed by a MR guided brachytherapy boost or external beam boost (further 10 fractions.) They will be treated with weekly cisplatin 40mg/m2 if clinically appropriate.

As part of standard treatment patients have a staging MR scan at diagnosis, a radiotherapy planning CT and an MR scan in the 4th week of treatment. Cone beam imaging will also be performed. Response will be assessed as standard with a MR scan at 3 months.

As part of the study patients will undergo 3 additional MR scans. These will take place in the 1st, 2nd and 5th weeks of treatment. Extra sequences will be added to the clinical mid-point scan in the 4th week of treatment. These MR scans will include anatomical images - with full and empty bladder as well as cine data (with a scan every minute for 10 minutes) to assess intra fraction motion. They will also include a DWI sequence, which will be used to assess if early prediction of response is possible. The frequency of cone beam imaging will be increased from approximately 10 scans as standard of care to 25 scans to allow for daily imaging.

The 1st MR scan will be contoured to outline clinical target volumes (CTVs) and OARs. A variety of planning strategies will be developed including standard planning target volume (PTV) margins, a plan of the day (POTD) approach, a POTD+ as well as an online adaptation model. These models will be used to assess coverage of CTV and PTV as well as dose to OARs using the scans obtained during the radiotherapy treatment. The practicality of each approach will also be assessed. Inter and intra fraction organ motion will also be analysed in order to develop patient specific models.

Studietyp

Interventionell

Inskrivning (Faktisk)

20

Fas

  • Inte tillämpbar

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

    • Greater Manchester
      • Manchester, Greater Manchester, Storbritannien, M20 4BX
        • The Christie NHS Foundation Trust

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år och äldre (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Kvinna

Beskrivning

Inclusion Criteria:

  • Histologically confirmed diagnosis of cervical cancer
  • Treatment with primary curative intent
  • Undergoing external beam radiotherapy (+/-chemotherapy) followed by brachytherapy or an external beam boost
  • Age over 18

Exclusion Criteria:

  • Any contraindications to MR identified after MR safety screening including completion of an MR Safety Screening Form (see appendix 1)
  • Previous hysterectomy
  • Unable to tolerate MR scans
  • Metastatic disease
  • Pregnancy

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Grundläggande vetenskap
  • Tilldelning: N/A
  • Interventionsmodell: Enskild gruppuppgift
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: MR scans
As part of the study patients will undergo 3 additional MR scans during radiotherapy treatment. These will take place in the 1st, 2nd and 5th weeks of treatment.
Additional imaging using MR scans.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Coverage of the Clinical Target Volume and dose to the Organs At Risk for different adaptive radiotherapy strategies.
Tidsram: 18 months
Coverage of the Clinical Target Volume and dose to the Organs At Risk for different adaptive radiotherapy strategies.
18 months

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Diffusion Weighted Imaging on MR prior to and during treatment and clinical response to treatment on post treatment MR scan.
Tidsram: 18 months
Diffusion Weighted Imaging on MR prior to and during treatment and clinical response to treatment on post treatment MR scan.
18 months
Bladder filling using MR sequences and stratification of patients into large or small cervix motion.
Tidsram: 18 months
Bladder filling using MR sequences and stratification of patients into large or small cervix motion.
18 months

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Utredare

  • Huvudutredare: Marcel van Herk, University of Manchester
  • Huvudutredare: Ananya Choudhury, The Christie NHS Foundation Trust

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Faktisk)

1 september 2017

Primärt slutförande (Faktisk)

1 december 2018

Avslutad studie (Faktisk)

1 mars 2019

Studieregistreringsdatum

Först inskickad

16 mars 2017

Först inskickad som uppfyllde QC-kriterierna

29 mars 2017

Första postat (Faktisk)

5 april 2017

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

2 augusti 2019

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

1 augusti 2019

Senast verifierad

1 augusti 2019

Mer information

Termer relaterade till denna studie

Plan för individuella deltagardata (IPD)

Planerar du att dela individuella deltagardata (IPD)?

Nej

Läkemedels- och apparatinformation, studiedokument

Studerar en amerikansk FDA-reglerad läkemedelsprodukt

Nej

Studerar en amerikansk FDA-reglerad produktprodukt

Nej

Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .

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