Using Ultrasound Spectrum Analysis (USA) to Guide Dose Escalated Prostate Brachytherapy (USA)
11 mars 2016 mis à jour par: Beth Israel Medical Center
Phase I/II Evaluation of Cancer-Specific Imaging Using Ultrasound Spectrum Analysis (USA) to Guide Dose Escalated Prostate Brachytherapy
In standard treatment, the seeds are placed throughout the prostate to treat the entire prostate.
This is done because it was impossible to know where the cancer was located within the prostate.
A new technique has been developed using the same ultrasound imaging that you probably had when you had your biopsy.
Using this technique, areas likely to contain prostate cancer can be identified.In this early study of 15 subjects, we will test if this method to plan your prostate seed implant is safe and can be done as part of regular care.
Areas identified as suspicious for cancer will be treated with higher doses of radiation while those areas not demonstrating cancer will be treated to the standard minimum dose.
The higher dose areas will receive two times the minimum dose the prostate usually receives.
Because this technique is not perfect, those areas not identified as cancerous should be treated in case there is a cancer area that the technique did not identify.
Subjects enrolled in this study will then be followed with this ultrasound technique over the next two years to monitor the changes to the cancerous areas and will undergo a biopsy two years after the procedure.
Subjects will, of course, be monitored to assess the success of the technique and its side effects.
Aperçu de l'étude
Statut
Complété
Les conditions
Description détaillée
Prostate brachytherapy is an increasingly popular treatment for clinically localized prostate cancer.In properly selected patients, it is highly effective with biochemical (PSA) disease free survival rates of 80-87% at 5-10 years.However, the technique is currently limited by the inability to localize the cancer within the prostate.
The multifocal nature of prostate cancer is well established.
Because of the inability to know where within the prostate the cancer is located, radiation must be delivered throughout the gland.
Although this blind approach leads to good results, it is clear that there are regions of the prostate and surrounding tissue that are overexposed to radiation while others are underexposed relative to their true need based on their tumor burden and their proximity to the tumor areas.Feleppa et al. at Riverside Research Institute (New York, NY), a non-profit ultrasound research center, have developed an ultrasound-based technique to identify cancer-containing areas within the prostate.
This technique uses current ultrasound equipment already in use for prostate brachytherapy guidance.
By extracting and processing the radiofrequency signal obtained from the ultrasound transducer in ways not done to create the standard B-mode ultrasound image, areas of cancer can be identified and displayed overlying the standard B-mode ultrasound image.In this study, we propose to obtain these ultrasound-based cancer-specific images of the prostate prior to the brachytherapy and use them to direct the dosimetry planning.The primary goal of this study is to demonstrate that this imaging modality can be incorporated into the treatment planning process for brachytherapy.
Furthermore, we wish to demonstrate the improved dosimetry of the cancer-identified regions while maintaining the urethral dose guidelines noted above.
We also wish to compare the differences in dose to the other adjacent normal structures (anterior rectum and right and left neurovascular bundles).
Additionally, we seek to demonstrate, at a minimum, no increased toxicity with this approach and similar disease control rates.
Of course, ultimately the goal will be to demonstrate a superior therapeutic ratio with this technique.
Type d'étude
Interventionnel
Inscription (Réel)
14
Phase
- Phase 2
- La phase 1
Contacts et emplacements
Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.
Lieux d'étude
-
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New York
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New York, New York, États-Unis, 10019
- St.Luke's-Roosevelt Hospital Center
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Critères de participation
Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.
Critère d'éligibilité
Âges éligibles pour étudier
18 ans et plus (Adulte, Adulte plus âgé)
Accepte les volontaires sains
Non
Sexes éligibles pour l'étude
Homme
La description
Inclusion Criteria:
- Clinical stage ≤ T2b according to the American Joint Commission on Cancer 6th Edition28
- PSA ≤ 10 ng/ml
- Gleason sum on biopsy ≤ 6
- Prostate volume ≤ 50 cc
- Willing to continue follow-up for at least two years.
Exclusion Criteria:
- No prior hormone therapy
- No prior radiotherapy
- No history of collagen vascular disease
- No history of inflammatory bowel disease
Plan d'étude
Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: N / A
- Modèle interventionnel: Affectation à un seul groupe
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
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Expérimental: pre-implant transrectal ultrasound images and planning
Transrectal ultrasound session will be performed at a separate session prior to the implant.
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The technique uses current ultrasound equipment already in use for prostate brachytherapy guidance.By extracting and processing the radiofrequency signal obtained from the ultrasound transducer in ways not done to create the standard B-mode ultrasound image, areas of cancer can be identified and displayed overlying the standard B-mode ultrasound image.
Comparing the results with this technique to the results of prostate biopsies demonstrates a high degree of accuracy with the area under the receiver-operator characteristic curve of 0.87, a result superior to any other imaging methods.
an ultrasound-based technique to identify cancer-containing areas within the prostate.
ultrasound-based cancer-specific images of the prostate prior to the brachytherapy and use them to direct the dosimetry planning
Autres noms:
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Délai |
|---|---|
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modified B+K ultrasound-based tissue-type images
Délai: 2 years
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2 years
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Collaborateurs et enquêteurs
C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.
Parrainer
Collaborateurs
Les enquêteurs
- Chercheur principal: Ronald Ennis, MD, St. Luke's-Roosevelt Hospital Center
Publications et liens utiles
La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.
Dates d'enregistrement des études
Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.
Dates principales de l'étude
Début de l'étude
1 février 2007
Achèvement primaire (Réel)
1 août 2014
Achèvement de l'étude (Réel)
1 août 2014
Dates d'inscription aux études
Première soumission
22 octobre 2010
Première soumission répondant aux critères de contrôle qualité
22 octobre 2010
Première publication (Estimation)
25 octobre 2010
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
14 mars 2016
Dernière mise à jour soumise répondant aux critères de contrôle qualité
11 mars 2016
Dernière vérification
1 mars 2016
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- 06-147
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