- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT01924338
Validation of a Method to Measure Soft Tissue Thickness Using Near Infrared Laser Light
Validierung Der Bestimmung Der Gewebedicke Mit Hilfe Von Licht im Infrarotbereich
The study is intended to verify a newly developed method to measure the thickness of cranial soft tissue. In the study, a high-resolution MRI scan is used as ground truth for a laser scan of the forehead. The laser scan is acquired point by point with a prototype scanning unit developed at the University of Luebeck's Institute for Robotics.
The measured tissue thickness using the near-infrared scanning approach is validated against the ground truth obtained by the MRI scan. The average accuracy of the reconstruction method is then computed over all subjects from the individual study arms.
The required laser intensity and exposure time as well as the achieved measurement accuracy is evaluated with respect to the different skin types of the test subjects. Correlation between these features and the skin type according to the Fitzpatrick scale will be computed.
For 1/3 of the subjects, the laser and MRI scans are repeated after 2 and 8 weeks. The results of the scans are compared and time dependency is analysed.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Type d'étude
Inscription (Anticipé)
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
-
-
Schleswig-Holstein
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Lübeck, Schleswig-Holstein, Allemagne, 23562
- Actif, ne recrute pas
- Clinic for Maxillofacial Surgery of the University Hospital Schleswig-Holstein
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Lübeck, Schleswig-Holstein, Allemagne, 23562
- Recrutement
- University of Luebeck, Institute for Robotics
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Contact:
- Floris Ernst, PhD
- Numéro de téléphone: +494515005208
- E-mail: ernst@rob.uni-luebeck.de
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Chercheur principal:
- Floris Ernst, PhD
-
-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- male and female adults
- variations in skin type (at least 10 subjects with skin types I & II, at least 2 subjects with skin type III, at least 3 subjects with skin type IV, at least 3 subjects with skin types V & VI)
- optional: availability of high-resolution CT or CBCT (cone-beam CT) scan of the forehead
Exclusion Criteria:
- allergies or intolerances against ABS (acrylonitrile butadiene styrene), PMMA (polymethyl methacrylate) or alginate
- elevated light sensitivity of the skin
- exclusion criteria for MRI (claustrophobia, motoric disorders, tattoos, body piercings, metallic implants in the skull, epilepsy, cardiac pacemakers)
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Science basique
- Répartition: Non randomisé
- Modèle interventionnel: Affectation à un seul groupe
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
---|---|
Expérimental: Skin types I and II
Volunteers classified as skin types I and II according to the Fitzpatrick Scale Procedures: dental cast creation, MRI scan, laser scan |
Acquisition of a high-resolution MRI scan (0.15 x 0.15 x 1.0 mm³) aligned with the AC-PC (anterior commissure-posterior commissure) line
A near-infrared laser scan of the subject's forehead is acquired
A dental cast made of PMMA (polymethyl methacrylate) of the subject's maxilla is created
|
Expérimental: Skin type III
Volunteers classified as skin type III according to the Fitzpatrick Scale Procedures: dental cast creation, MRI scan, laser scan |
Acquisition of a high-resolution MRI scan (0.15 x 0.15 x 1.0 mm³) aligned with the AC-PC (anterior commissure-posterior commissure) line
A near-infrared laser scan of the subject's forehead is acquired
A dental cast made of PMMA (polymethyl methacrylate) of the subject's maxilla is created
|
Expérimental: Skin type IV
Volunteers classified as skin type IV according to the Fitzpatrick Scale Procedures: dental cast creation, MRI scan, laser scan |
Acquisition of a high-resolution MRI scan (0.15 x 0.15 x 1.0 mm³) aligned with the AC-PC (anterior commissure-posterior commissure) line
A near-infrared laser scan of the subject's forehead is acquired
A dental cast made of PMMA (polymethyl methacrylate) of the subject's maxilla is created
|
Expérimental: Skin types V and VI
Volunteers classified as skin types V and VI according to the Fitzpatrick Scale Procedures: dental cast creation, MRI scan, laser scan |
Acquisition of a high-resolution MRI scan (0.15 x 0.15 x 1.0 mm³) aligned with the AC-PC (anterior commissure-posterior commissure) line
A near-infrared laser scan of the subject's forehead is acquired
A dental cast made of PMMA (polymethyl methacrylate) of the subject's maxilla is created
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Délai |
---|---|
Average accuracy of tissue thickness measurement method [mm]
Délai: up to 6 months
|
up to 6 months
|
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
System dependency on skin color - required intensity
Délai: up to 6 months
|
Correlation between skin types (according to the Fitzpatrick scale) and the outcome (required laser intensity [mW])
|
up to 6 months
|
Long-term stability of measured features - accuracy
Délai: up to 8 months
|
Change in measurement accuracy [mm]
|
up to 8 months
|
Long-term stability of measured features - required intensity
Délai: up to 8 months
|
Change in required laser intensity [mW]
|
up to 8 months
|
Long-term stability of measured features - required exposure time
Délai: up to 8 months
|
Change in required exposure time [ms]
|
up to 8 months
|
System dependency on skin color - accuracy
Délai: up to 6 months
|
Correlation between skin types (according to the Fitzpatrick scale) and the outcome (accuracy of tissue thickness measurement [mm])
|
up to 6 months
|
System dependency on skin color - exposure time
Délai: up to 6 months
|
Correlation between skin types (according to the Fitzpatrick scale) and the outcome (required exposure time [ms])
|
up to 6 months
|
Collaborateurs et enquêteurs
Parrainer
Les enquêteurs
- Chercheur principal: Floris Ernst, PhD, University of Luebeck
Publications et liens utiles
Liens utiles
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Anticipé)
Achèvement de l'étude (Anticipé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Autres numéros d'identification d'étude
- ROB-NIRMR-001
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