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Diagnostic Performance of Multiparametric Magnetic Resonance Imaging After Transurethral Resection of Bladder Tumour for Prediction of Muscle Invasion and Detection of Residual Tumour in Non-muscle-invasive Bladder Cancer Patients (SMART-BC)
SMART-BC is a prospective, single-centre clinical investigation evaluating the diagnostic performance of multiparametric magnetic resonance imaging (mpMRI) for detecting residual bladder tumour and predicting muscle invasion in patients with non-muscle-invasive bladder cancer (NMIBC).
The study comprises two work packages. WP1 will include 20 healthy volunteers to optimize the bladder MRI protocol using additional clinical sequences without contrast injection, assessing image quality through quantitative and qualitative metrics. WP2 will enrol up to 66 patients with newly diagnosed bladder lesions and suspicious or high-grade urinary cytology, aiming to obtain 33 evaluable patients who undergo pre- and post-transurethral resection of bladder tumour (TURBT) MRI and repeat TURBT (re-TURBT), when clinically indicated.
In WP2, mpMRI will be performed before initial TURBT and approximately 3-4 weeks afterwards in patients requiring re-TURBT. Diagnostic performance will be assessed using sensitivity, specificity, positive predictive value and negative predictive value, with histopathology as the reference standard. Standard VI-RADS sequences will be compared with an optimized protocol incorporating additional sequences. Secondary objectives include inter-reader agreement, patient-reported comfort and satisfaction, and preliminary evaluation of healthcare costs and the potential to avoid unnecessary re-TURBT procedures. Safety will be assessed through the systematic collection of adverse events, serious adverse events and device deficiencies.
The investigation uses CE-marked 3T MRI systems and follows routine clinical management pathways. Its long-term aim is to determine whether post-TURBT mpMRI can improve diagnostic assessment and support more personalized management of patients with high-risk NMIBC.
Studie Overzicht
Toestand
Conditie
Interventie / Behandeling
Studietype
Inschrijving (Geschat)
Fase
- Niet toepasbaar
Contacten en locaties
Studiecontact
- Naam: Naïk NVV Vietti-Violi, Médecin asscoiée
- Telefoonnummer: +41 79 556 02 40
- E-mail: Naik.Vietti-Violi@chuv.ch
Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Geslachten die in aanmerking komen voor studie
Beschrijving
Inclusion Criteria:
- All adult patients with bladder lesion at cystoscopy and indication for a TURBT, and with a urinary cytology positive or suspicious for atypia or high grade (HG) urothelial carcinoma .
- Informed Consent signed by the subject
Exclusion Criteria:
- Cystoscopic assessment suspicious for MIBC, or prior cross-sectional imaging-such as CT-demonstrating extra bladder extension (e.g., cT3-T4)
- Pregnancy
- MRI contrast agent precaution
- MRI contraindication (including severe claustrophobia and metallic material presence)
- Patients with hip prosthesis (to avoid non diagnostic MRI examination due to metal artifacts)
- Any other condition making the patient unsuitable for the study
- Patient's refusal of transmission of relevant medical conditions found on the medical examinations performed during the study
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Diagnostisch
- Toewijzing: NVT
- Interventioneel model: Opdracht voor een enkele groep
- Masker: Geen (open label)
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
|---|---|
|
Experimenteel: Multiparametric Magnetic Resonance Imaging
Participants with suspected bladder cancer will undergo multiparametric magnetic resonance imaging before transurethral resection of bladder tumour. Patients requiring repeat resection according to clinical indications will undergo a second magnetic resonance imaging examination approximately 3-4 weeks after the initial resection. Imaging findings will be compared with histopathological results to assess diagnostic performance. |
Bladder magnetic resonance imaging performed using a 3T MRI system, including standard VI-RADS sequences and additional optimized sequences. Imaging is performed before initial transurethral resection and, when clinically indicated, before repeat resection. The study evaluates image quality and the diagnostic performance of magnetic resonance imaging for detecting residual bladder tumour and predicting muscle invasion. |
Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
Diagnostic Performance
Tijdsspanne: Approximately 3-4 weeks after initial transurethral resection, before repeat resection when clinically indicated.
|
Diagnostic accuracy metrics (sensitivity, specificity, positive predictive value [PPV], and negative predictive value [NPV]) of mpMRI performed 3-4 weeks after initial TURBT for detecting residual bladder tumour, using histopathology as the reference standard. |
Approximately 3-4 weeks after initial transurethral resection, before repeat resection when clinically indicated.
|
Medewerkers en onderzoekers
Sponsor
Studie record data
Bestudeer belangrijke data
Studie start (Geschat)
Primaire voltooiing (Geschat)
Studie voltooiing (Geschat)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Werkelijk)
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
- Blaaskanker
- Magnetische resonantie beeldvorming
- Niet-spierinvasieve blaaskanker
- Diagnostische nauwkeurigheid
- Multiparametrische magnetische resonantie beeldvorming
- Residual tumour
- Muscle invasion
- Transurethral resection of bladder tumour
- Bladder cancer staging
- Repeat transurethral resection of bladder tumour
Aanvullende relevante MeSH-voorwaarden
- Urogenitale ziekten
- Pathologische processen
- Urogenitale neoplasmata
- Neoplasmata per site
- Neoplasmata
- Mannelijke urogenitale ziekten
- Urologische ziekten
- Vrouwelijke urogenitale ziekten
- Vrouwelijke urogenitale ziekten en zwangerschapscomplicaties
- Neoplasmata per histologisch type
- Neoplasmata, glandulair en epitheel
- Neoplastische processen
- Urologische neoplasmata
- Carcinoom
- Ziekten van de urineblaas
- Pathologische aandoeningen, tekenen en symptomen
- Niet-spierinvasieve blaasneoplasmata
- Neoplasma, residuaal
- Neoplasmata van de urineblaas
Andere studie-ID-nummers
- 2026-D0029
Plan Individuele Deelnemersgegevens (IPD)
Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?
Informatie over medicijnen en apparaten, studiedocumenten
Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel
Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct
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