AzTrials
AzTrials

Bone FracturesULD-TraumatoNCT04074733

Diagnostic Performance of the Ultra Low-Dose (ULD) Scanner vs. Diagnostic Performance With Standard X-rays in the Emergency Department Compared With Performance of the Standard Classical-dose Scanner for Trauma of the Dorsolumbar Spine, Pelvis and Extremities

An observational study of Bone Fractures, run by Centre Hospitalier Universitaire de Nīmes at 5 sites in France.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
Search all trials

Trial summary

The conventional standard-dose scanner leads to a significantly greater X-ray exposure than the standard X-ray. Recently, technological innovations like the ULD ("Ultra Low Dose") scanner have been developed to reduce the dose of X-rays delivered to the patient. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Bone Fractures
What is being tested?
Patient undergoes a ULD scan, Patient undergoes a standard X-ray and Patient undergoes a classic-dose scan
How many people
554 participants
Where
5 sitesFrance
Study dates
21 Oct 2019to 12 Sep 2025
Phase
Observational
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Study population: Any patient presenting at the emergency department patient for trauma of the dorso-lumbar spine, pelvis, proximal femurs, and / or extremities requiring standard X-rays.

Who may be able to join

  • Patient with a BMI <40 kg / m²
  • Emergency department patient for trauma of the dorso-lumbar spine, pelvis, proximal femurs, and / or extremities requiring standard radiographs
  • Patient with painful symptomatology causing suspicion of a broken bone
  • Patient or family member / trusted person / family member who has given free and informed consent
  • Patient or family member / trusted person / family member who has signed the consent form
  • Patient beneficiary or affiliate of a health insurance plan

Who cannot join

  • Patient participating in a category 1 study
  • Patient in a period of exclusion determined by another study
  • Patient on under juridical protection, under curatorship or under guardianship
  • Patient for whom it is impossible to give informed information
  • Pregnant, parturient or nursing patient
  • Polytraumatised patient
  • Patients in vital emergency requiring urgent scanner

Trial locations and contacts

5 sites in 1 country.

5 sites in 1 country

France5 sites
  • Menouer TALEB

    Alès

  • Clinique du Parc

    Castelnau-le-Lez, Hérault, 34170

  • Centre Hospitalier de Mont-de-Marsan

    Mont-de-Marsan, New Aquitaine, 40024

  • Centre Hospitalier Universitaire

    Nîmes, Gard, 30029

  • Clinique de l'Union

    Saint-Jean, Haute-Garonne, 31240

Other trials in France

About this study

The conventional standard-dose scanner leads to a significantly greater X-ray exposure than the standard X-ray. Recently, technological innovations like the ULD ("Ultra Low Dose") scanner have been developed to reduce the dose of X-rays delivered to the patient. The general purpose of this study is to validate the ULD scanner in case of emergency trauma of the dorsolumbar spine, pelvis and / or extremities.

Read the detailed description

The main purpose of this study is to compare the diagnostic performances of the ULD scanner with those of the standard X-ray when looking for fractures of the dorsolumbar region, the pelvis, proximal femur or the extremities, in an emergency situation in adults, once the diagnosis of fracture has been ascertained by the classical standard-dose scanner (gold standard). The statistical analyses will be performed with the help version 9.4 or subsequent versions of SAS software (SAS Institute, Cary, NC, USA) and/or version 3.5.1 or subsequent versions of R software (R Development Core Team (2018). R Foundation for Statistical Computing, Vienna, Austria).

The secondary objectives of this study are to:

  1. Compare the diagnostic performances of the two examination methods under study (ULD scan vs. standard X-ray) in the search for bone structure anomalies, damage to the soft tissues, damage to the joints and/or discopathies at the site(s) involved.
  2. Compare the diagnostic performances of the two examination methods under study) (ULD scan vs. standard X-ray) in the search for fractures of the site involved. C. Evaluate the diagnostic agreement between two readers (senior radiologist and junior radiologist) for each of the two examination methods under study (ULD scan vs. standard X-ray).
  3. Compare the radiologist's self-declared impression of each of the two examination methods under study (ULD scan vs. standard X-ray) in terms of subjective quality: overall image quality, diagnostic quality of the examination method and the level of confidence in the diagnosis made, overall and for each of the two readers (senior and junior).
  4. Compare the doses of X-rays administered for each of the two examination methods under study (ULD scan vs. standard X-ray).
  5. Compare the interpretation time for each examination method under study (ULD scan vs. standard X-ray), globally and for each of the two readers (senior and junior).

For the evaluation of the diagnostic performances (main objective and secondary objectives A et B), only the senior radiologist's interpretation will be considered.

Conditions
Bone Fractures
Being tested
Patient undergoes a ULD scan, Patient undergoes a standard X-ray, Patient undergoes a classic-dose scan
Keywords
ULD
Medical subject headings
Fractures, Bone

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Patient undergoes a ULD scanDiagnostic test

    The following doses will be applied:

    6 mGy.cm for the extremities 50 mGy.cm for the dorsal spine 130 mGy.cm for the lumbar spine 130 mGy.cm for the pelvis

  • Patient undergoes a standard X-rayDiagnostic test

    The following doses will be applied:

    For the pelvis : front view and profile for the hip. For the dorsal spine : front and profile. For the lumbar spine : front and profile For the extremities : front and profile

  • Patient undergoes a classic-dose scanDiagnostic test

    The following doses will be applied:

    6 mGy.cm for the extremities 50 mGy.cm for the dorsal spine 130 mGy.cm for the lumbar spine 130 mGy.cm for the pelvis

Study groups in NCT04074733
Study groupRoleWhat they receive
Patients with fracturesNot described
Receives: Diagnostic Test: Patient undergoes a ULD scan; Diagnostic Test: Patient undergoes a standard X-ray; Diagnostic Test: Patient undergoes a classic-dose scan

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Presence of at least one fracture in the dorsal spine evaluated with a classical, standard-dose scan (Gold standard)

    YES/NO

    Measured: Day 0

  2. Presence of at least one fracture in the lumbar spine evaluated with a classical, standard-dose scan (Gold standard)

    YES/NO

    Measured: Day 0

  3. Presence of at least one fracture of the pelvis and proximal femurs evaluated with a classical, standard-dose scan (Gold standard)

    YES/NO

    Measured: Day 0

  4. Presence of at least one fracture of the hands / wrists evaluated with a classical, standard-dose scan (Gold standard)

    YES/NO

    Measured: Day 0

  5. Presence of at least one fracture of the feet /ankles evaluated with a classical, standard-dose scan (Gold standard)

    YES/NO

    Measured: Day 0

  6. Presence of at least one fracture in the dorsal spine evaluated with a ULD scan

    YES/NO

    Measured: Day 0

  7. Presence of at least one fracture in the lumbar spine evaluated with a ULD scan

    YES/NO

    Measured: Day 0

  8. Presence of at least one fracture in the pelvis and proximal femurs evaluated with a ULD scan

    YES/NO

    Measured: Day 0

  9. Presence of at least one fracture of the hands / wrists evaluated with a ULD scan

    YES/NO

    Measured: Day 0

  10. Presence of at least one fracture of the feet /ankles evaluated with a ULD scan

    YES/NO

    Measured: Day 0

  11. Presence of at least one fracture of the dorsal spine evaluated with a standard X-ray

    YES/NO

    Measured: Day 0

  12. Presence of at least one fracture of the lumbar spine evaluated with a standard X-ray

    YES/NO

    Measured: Day 0

  13. Presence of at least one fracture of the pelvis and proximal femurs evaluated with a standard X-ray

    YES/NO

    Measured: Day 0

  14. Presence of at least one fracture of the hands / wrists evaluated with a standard X-ray

    YES/NO

    Measured: Day 0

  15. Presence of at least one fracture of the feet /ankles evaluated with a standard X-ray

    YES/NO

    Measured: Day 0

Secondary outcomes (19)
  1. Presence of an abnormality of the bone structure at the anatomic site(s) concerned evaluated with a classical Gold Standard scan

    YES/NO

    Measured: Day 0

  2. Presence of an abnormality of the soft tissues at the anatomic site(s) concerned evaluated with a classical Gold Standard scan

    YES/NO

    Measured: Day 0

  3. Presence of an abnormality of the joints at the anatomic site(s) concerned evaluated with a classical Gold Standard scan

    YES/NO

    Measured: Day 0

  4. Presence of an abnormality of the invertebral discs at the anatomic site(s) concerned evaluated with a classical Gold Standard scan

    YES/NO

    Measured: Day 0

  5. Presence of an abnormality of the bone structure at the anatomic site(s) concerned evaluated with a ULD scan

    YES/NO

    Measured: Day 0

  6. Presence of an abnormality of the soft tissues at the anatomic site(s) concerned evaluated with a ULD scan

    YES/NO

    Measured: Day 0

  7. Presence of an abnormality of the joints at the anatomic site(s) concerned evaluated with a ULD scan

    YES/NO

    Measured: Day 0

  8. Presence of an abnormality of the invertebral discs at the anatomic site(s) concerned evaluated with a ULD scan

    YES/NO

    Measured: Day 0

  9. Presence of an abnormality of the bone structure at the anatomic site(s) concerned evaluated with a standard X-ray

    YES/NO

    Measured: Day 0

  10. Presence of an abnormality of the soft tissues at the anatomic site(s) concerned evaluated with a standard X-ray

    YES/NO

    Measured: Day 0

  11. Presence of an abnormality of the joints at the anatomic site(s) concerned evaluated with a standard X-ray

    YES/NO

    Measured: Day 0

  12. Presence of an abnormality of the intervertebral discs at the anatomic concerned site(s) evaluated with a standard X-ray

    YES/NO

    Measured: Day 0

  13. Image quality of the ULD scanner and standard X-ray

    By means of a 4-point Likert scale, both the senior and junior radiologists can give their subjective impression of the overall image quality of each of the two examination methods under study (ULD scan vs. standard X-ray) by saying how much they agree or disagree that the overall quality of the image is good enough to detect a fracture. On the Lickert scale, 1- Uninterpretable, 2- Interpretable in spite of a slight technical problem (centering, movement, constant), 3-Completely interpretable in spite of a slight technical problem. 4- No technical problem.

    Measured: Day 0

  14. Diagnostic quality of the ULD scanner and standard X-ray

    Using a 5-point Lickert scale (in which 1= Inacceptable, 2 = Sub-optimal, 3 = Acceptable, 4 = Above average, 5- Excellent) both the senior and junior radiologists will give their subjective impression of the overall diagnostic quality of each of the two examination methods under study (ULD scan vs. standard X-ray).

    Measured: Day 0

  15. Confidence level of the ULD scanner and standard X-ray

    Using a 5-point Lickert scale (1- Very poor, 2- Poor, 3- Fair, 4- Good, 5- Excellent) both the senior and junior radiologists will give their subjective impression of their overall level of confidence in the diagnosis made for each of the two examination methods under study (ULD scan vs. standard X-ray).

    Measured: Day 0

  16. Effective dose for each exam with the ULD scanner

    No. of millisieverts (mSv)

    Measured: Day 0

  17. Effective dose for each exam with the standard X-ray

    No. of millisieverts (mSv)

    Measured: Day 0

  18. Interpretation time for each exam with the ULD scanner

    Measured in minutes

    Measured: Day 0

  19. Interpretation time for each exam with the standard X-ray

    Measured in minutes

    Measured: Day 0

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted30 Aug 2019
  2. Study start21 Oct 2019
  3. Primary completion12 Sep 2023
  4. Study completion12 Sep 2025

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Case only
Time perspective
Prospective
Enrolment
554 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04074733
Sponsor's protocol ID
PHRCi/2018/AL-01
Other IDs
2019-A00472-55
Acronym
ULD-Traumato
Status last verified
Dec 2025
First submitted
23 Aug 2019
Last updated
10 Dec 2025
Results posted
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided

Publications

  • Hamard A, Greffier J, Bastide S, Larbi A, Addala T, Sadate A, Beregi JP, Frandon J. Ultra-low-dose CT versus radiographs for minor spine and pelvis trauma: a Bayesian analysis of accuracy. Eur Radiol. 2021 Apr;31(4):2621-2633. doi: 10.1007/s00330-020-07304-8. Epub 2020 Oct 9.

    PubMed 33034747

Questions about this trial

What is this clinical trial studying?

An observational study of Bone Fractures, run by Centre Hospitalier Universitaire de Nīmes at 5 sites in France.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 10 Dec 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 5 sites in France. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Presence of at least one fracture in the dorsal spine evaluated with a classical, standard-dose scan (Gold standard) (time frame: Day 0). The study lists 15 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04074733, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 10 Dec 2025.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in