Breast PET Feasibility

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

COMPLETED

Clinical Phase

NA

Total Enrollment

12 participants

Study Classification

INTERVENTIONAL

Study Start Date

2016-10-05

Study Completion Date

2019-03-04

Brief Summary

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Breast PET may be able to help in the diagnostic pathway in patients to determine which ones need to go on to have a second look ultrasound +/- biopsy and those who need to be sent for MRI guided biopsy. This may reduce the need to create more anxiety and uncertainty in this group of patients, already extremely stressed by the recent diagnosis of breast cancer.This study involves a single trial visit the Royal Free Hospital for imaging. Participants will need to lie flat for up to 30 minutes on the PET-CT camera and up to 30 minutes on the MAMMI. They will be advised not to take part in this study if they are unable to lie flat on their back and their front for this length of time or if they are claustrophobic. They will be offered the opportunity to see the PET-CT scanner and the MAMMI before deciding to consent to the trial.

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Detailed Description

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This study involves a single trial visit the Royal Free Hospital for imaging. Participants will need to lie flat for up to 30 minutes on the PET-CT camera and up to 30 minutes on the MAMMI. They will be advised not to take part in this study if they are unable to lie flat on their back and their front for this length of time or if they are claustrophobic. They will be offered the opportunity to see the PET-CT scanner and the MAMMI before deciding to consent to the trial.

Participants will be exposed to a radiation dose from the radioactive tracer F-18 FDG that is injected into the vein before the scan and from the CT exposures during the scan. The dose associated with the injection of about 3 MBq/kg of F-18 FDG is in the range of 4-7mSv. A CT will be performed over the thorax to allow attenuation correction of PET images and localisation of tracer uptake. The dose from the thorax CT will be patient dependent but the mean dose to a patient undergoing this type of scan is 2.1mSv. A whole body CT will be performed from the base of the skull to mid-thigh to plan the bed positions for the whole body emission scan and to allow attenuation correction of PET images and localisation of tracer uptake. The dose from the whole body CT will be patient dependent but the mean dose to a patient undergoing this type of scan is 5.2mSv.The total radiation dose participants will be exposed to is in the range of 11.3-14.3mSv. This is equivalent to 4-5.3 years of background radiation to which individuals in the UK are regularly exposed. This would amount to an increased lifetime risk of cancer of approximately 1 in 1250 in a standard population. These risks are compared to a normal lifetime risk of cancer of 1 in 3.

The half-life of F-18 is 110 minutes. The duration of the scan will be up to 120 minutes post injection. The activity within the patient will have reduced by more than 50% through radioactive decay alone by the time they leave the department and will be further reduced by excretion in urine. As with standard clinical administration of F-18, patients will not need to follow any special restrictions once leaving the department.

The CT scanning protocols used in the trial PET-CT are the standard clinical protocols used in the nuclear medicine department and have been developed with a view to minimising the dose to the patient as far as possible. All women of childbearing potential will undergo a pregnancy test on the day of the scan before the injection of the radioactive tracer in order to rule out any risk to a potential foetus. Any woman of childbearing potential who is found to be pregnant or will not consent to a pregnancy test will be excluded from the trial.

Very rarely, individuals may develop an allergic reaction to the PET tracer. No serious adverse reactions to this tracer have been reported. Patients may experience some discomfort from having a needle inserted into their arm/hand in order to have the tracer injected. Occasionally the vein may become inflamed or infected, or they may experience bruising at the insertion site. All efforts will be made to avoid or minimise any discomfort or other adverse effects from these procedures.

Conditions

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Breast Neoplasm Female

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Small cohort.

Primary Study Purpose

HEALTH_SERVICES_RESEARCH

Blinding Strategy

NONE

Study Groups

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Breast PET

PET imaging of breast with patient in prone position.

Group Type EXPERIMENTAL

F-18 FDG breast PET scan

Intervention Type PROCEDURE

Interventions

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F-18 FDG breast PET scan

Intervention Type PROCEDURE

Other Intervention Names

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MAMMI

Eligibility Criteria

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Inclusion Criteria

1. Female
2. Age over 18 (no upper limit).
3. Not pregnant.
4. Not breastfeeding.
5. Indeterminate breast lesion on MRI requiring a second-look ultrasound.
6. Ability to lie still for up to 30 minutes prone and supine.
7. Females of childbearing potential have a negative pregnancy test within 7 days prior to being registered. Participants are considered not of child bearing potential if they are surgically sterile (i.e. they have undergone a hysterectomy, bilateral tubal ligation, or bilateral oophorectomy) or they are postmenopausal.
8. Willing and able to provide written informed consent.

Exclusion Criteria

1. Females who are pregnant, planning pregnancy or breastfeeding
2. Concurrent and/or recent involvement in other research that is likely to interfere with the intervention within 3 months prior to study enrolment
3. Inability to lie flat or undergo the tests.
4. Any co-morbidities or conditions which in the opinion of the clinical team means that the patient should be excluded.

Minimum Eligible Age

18 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

No