Pilot Study on the Feasibility of High-energy Collimation With Optimized Geometry on a VERITON™ CZT Camera (HELIOS)
Functional imaging using scintigraphy plays a major role in the diagnosis and monitoring of many diseases, particularly thanks to its ability to perform whole-body examinations with high contrast. The indications and use of scintigraphy have increased in recent years, particularly in connection with the development of internal vectorized radiotherapy. This therapeutic approach is based on the administration of radiotracers that enable targeted irradiation of tumor cells, whose biodistribution throughout the body can be analyzed and quantified using scintigraphy, particularly with iodine-131 and lutetium-177.
The recent boom in scintigraphy is also linked to the development of new 360° geometry CZT-SPECT cameras, which enable rapid tomographic acquisitions of the entire body with significantly improved image quality compared to conventional cameras. These systems use mobile CZT semiconductor detectors that dynamically scan the anatomical regions of interest.
CZT detectors are combined with a collimation system consisting of tungsten septa, which are essential for the directional filtering of gamma photons. Unlike conventional scintigraphic cameras, where collimators can be changed or adjusted according to the energy of the detected photons, CZT-SPECT 360° cameras generally rely on fixed collimation, which cannot be changed.
Studieoversigt
Status
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
Functional imaging using scintigraphy plays a major role in the diagnosis and monitoring of many diseases, particularly thanks to its ability to perform whole-body examinations with high contrast. The indications and use of scintigraphy have increased in recent years, particularly in connection with the development of internal vectorized radiotherapy. This therapeutic approach is based on the administration of radiotracers that enable targeted irradiation of tumor cells, whose biodistribution throughout the body can be analyzed and quantified using scintigraphy, particularly with iodine-131 and lutetium-177.
The recent boom in scintigraphy is also linked to the development of new 360° geometry CZT-SPECT cameras, which enable rapid tomographic acquisitions of the entire body with significantly improved image quality compared to conventional cameras. These systems use mobile CZT semiconductor detectors that dynamically scan the anatomical regions of interest.
CZT detectors are combined with a collimation system consisting of tungsten septa, which are essential for the directional filtering of gamma photons. Unlike conventional scintigraphic cameras, where collimators can be changed or adjusted according to the energy of the detected photons, CZT-SPECT 360° cameras generally rely on fixed collimation, which cannot be changed.
Undersøgelsestype
Tilmelding (Anslået)
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiekontakt
- Navn: Anne-Sophie Hue Project Manager, MSc
- Telefonnummer: +33.3.83.15.34.75
- E-mail: a.hue@chru-nancy.fr
Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
- Ældre voksen
Tager imod sunde frivillige
Beskrivelse
Inclusion Criteria:
- patients with multiple known lesions (≥ 2 metastases or lesions of other types) who, as part of their clinical management, require either (i) a 99mTc-HDP bone scan, or (ii) a post-therapeutic 177Lu-PSMA scan, or (iii) a post-therapeutic 131I scintigraphy.
- Person who has undergone a preliminary clinical examination appropriate for clinical research.
- Adult subject who has received complete information about the research and has signed the informed consent form.
- General condition, WHO ≤ 2, and ability to remain lying down without moving for nearly an hour.
Exclusion Criteria:
- Subjects with a contraindication, according to the target examination group, to injection of 99mTc-HDP (Technescan HDP, Curium Pharma), 177Lu-PSMA (Pluvicto®, Novartis), or 131I (131I sodium iodide for therapy, Curium Pharma) .
- Subjects covered by Articles L. 1121-5, L. 1121-7, and L1121-8 of the Public Health Code.
- Pregnant women, women in labor, or breastfeeding mothers.
- Subjects subject to legal protection measures (guardianship, curatorship, judicial protection).
- Subjects unable to give their consent.
- Subjects deprived of their liberty by a judicial or administrative decision, persons receiving psychiatric care pursuant to Articles L. 3212-1 and L.3213-1.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Diagnostisk
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Ingen (Åben etiket)
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
|---|---|
|
Eksperimentel: VERITON-CT New
Optimized collimators for the CZT detectors of the VERITON™ 400 wide-field camera (Spectrum Dynamics Medical) enabling better selection of incident photons
|
- Whole-body 3D recording on the VERITON™ 400 camera equipped with conventional collimators for technetium-99m and lutetium-177.
|
|
Aktiv komparator: Référence
|
Full-body 3D recording on the VERITON™ 400 camera
Whole-body 2D and cervicothoracic 3D recordings using an Anger camera (SYMBIA camera, Siemens Healthineers) for iodine-131 images.
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Feasability of whole-body SPECT/CT imaging with iodine-131 using the optimized collimator
Tidsramme: 1 month
|
Data analysis obtained with optimized collimator and with conventional collimator
|
1 month
|
|
Perform quantitative analysis of technetium-99m and lutetium-177 with feasability results
Tidsramme: 1 month
|
Image sharpness improvment
|
1 month
|
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Overall quality of whole-body CZT acquisitions with iodine-131
Tidsramme: 1 month
|
For iodine-131, the overall quality of images acquired using the CZT-SPECT camera with the new collimator will be described based on an ordinal score for stellar artifacts (absent, present but not interfering, present and interfering), assessed independently by two experienced readers.
The frequency and severity of artifacts will be reported, as well as their association with the interpretable or non-interpretable nature of the examinations defined in the primary endpoint.
Inter-reader agreement will also be described.
|
1 month
|
|
Quantify the detectability and contrast of lesions visualized on whole-body CZT imaging with iodine-131.
Tidsramme: 1 month
|
Sharpness, defined as the maximum slope of the intensity profile at the edge of the lesions and the contrast-to-noise ratio
|
1 month
|
Samarbejdspartnere og efterforskere
Sponsor
Datoer for undersøgelser
Studer store datoer
Studiestart (Anslået)
Primær færdiggørelse (Anslået)
Studieafslutning (Anslået)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- 2026-A00456-45
Plan for individuelle deltagerdata (IPD)
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