Benefit of Tin Filter in Regards to Image Quality and Radiation Dose in CT Scan Study of Pulmonary Parenchyma
NCT ID: NCT04119141
Last Updated: 2019-10-08
Study Results
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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UNKNOWN
NA
25 participants
INTERVENTIONAL
2019-05-10
2020-06-30
Brief Summary
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Detailed Description
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This study fits into the context of pleural pathology screening for patients exposed to asbestos in their professional environment.
Today, the chest CT scan in millimetric sections isth e standardised method used in the context of this screening.Tin filtration is an additional filtration at the output of the X-ray tube made available on premium Siemens scanners. In diagnostic medical imaging, the photon beam has an energetic spectrum ranging from 0 to 150 keV. However the weak energies do not participate in the formation of the image but, on the other hand, to the overall radiation of the patient. The purpose of the addition of the tin filter is to be able to suppress, at the output of the tube, all low and medium energy levels, only allowing high energy levels to pass through. A previous study comparing the same group of patients on two different machines (one with tin filtration, one without tin filtration) showed a significant decrease in the radiation dose; nevertheless, a certain number of parameters differed between the two scanners used. In order to get rid of the different biases encountered on previous published studies, we propose to carry out this study on the same machine, by activating and deactivating tin filtration, all other parameters of acquisition and reconstruction of the image being equal in all respects.
Conditions
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Study Design
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RANDOMIZED
CROSSOVER
DEVICE_FEASIBILITY
SINGLE
Study Groups
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Standard Arm
the first acquisition will be carried out without a tin filter in supine position and the second with tin filter in procubitus.
X ray imaging
Acquisition:
* 140 kVp,
* 1/2 mAs/kg,
* Pitch: 1.35,
* Rotation time: 0.5 sec.
Reconstruction:
* I70f filter, 3 iteration loops,
* Cutting thickness 1 mm/0.7 mm
* Fenestration: C -600/W 1600
* Field of view (Size, x \& y coordinates) identical on both acquisitions.
Tin filter Arm
the first acquisition will be carried out with tin filter in supine position and the second without tin filter in procubitus.
X ray imaging
Acquisition:
* 140 kVp,
* 1/2 mAs/kg,
* Pitch: 1.35,
* Rotation time: 0.5 sec.
Reconstruction:
* I70f filter, 3 iteration loops,
* Cutting thickness 1 mm/0.7 mm
* Fenestration: C -600/W 1600
* Field of view (Size, x \& y coordinates) identical on both acquisitions.
Interventions
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X ray imaging
Acquisition:
* 140 kVp,
* 1/2 mAs/kg,
* Pitch: 1.35,
* Rotation time: 0.5 sec.
Reconstruction:
* I70f filter, 3 iteration loops,
* Cutting thickness 1 mm/0.7 mm
* Fenestration: C -600/W 1600
* Field of view (Size, x \& y coordinates) identical on both acquisitions.
Eligibility Criteria
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Inclusion Criteria
* Patient referred for chest CT scan in the context of screening or monitoring of occupational exposure to asbestos.
* Patient with health insurance or beneficiary of a social security scheme.
* Patient having given their express consent.
Exclusion Criteria
* Lactating or parturient women
* Minors.
* Protected patients: Adults under trusteeship, guardianship or other legal protection, deprived of liberty by judicial or administrative decision; hospitalised without consent.
18 Years
ALL
No
Sponsors
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Dr Béatrice Daoud
UNKNOWN
Ramsay Générale de Santé
OTHER
Responsible Party
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Locations
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Hôpital Privé d'Antony Antony
Antony, IDF, France
Countries
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Central Contacts
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Facility Contacts
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Other Identifiers
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2018-A00918-47
Identifier Type: -
Identifier Source: org_study_id
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