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.
Studieöversikt
Status
Betingelser
Intervention / Behandling
Studietyp
Inskrivning (Beräknad)
Fas
- Inte tillämpbar
Kontakter och platser
Studiekontakt
- Namn: Naïk NVV Vietti-Violi, Médecin asscoiée
- Telefonnummer: +41 79 556 02 40
- E-post: Naik.Vietti-Violi@chuv.ch
Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
Tar emot friska volontärer
Kön som är behöriga för studier
Beskrivning
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
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Diagnostisk
- Tilldelning: N/A
- Interventionsmodell: Enskild gruppuppgift
- Maskning: Ingen (Open Label)
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
|
Experimentell: 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. |
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Diagnostic Performance
Tidsram: 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.
|
Samarbetspartners och utredare
Sponsor
Studieavstämningsdatum
Studera stora datum
Studiestart (Beräknad)
Primärt slutförande (Beräknad)
Avslutad studie (Beräknad)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Faktisk)
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Nyckelord
Ytterligare relevanta MeSH-villkor
- Urogenitala sjukdomar
- Patologiska processer
- Urogenitala neoplasmer
- Neoplasmer efter plats
- Neoplasmer
- Manliga urogenitala sjukdomar
- Urologiska sjukdomar
- Kvinnliga urogenitala sjukdomar
- Kvinnliga urogenitala sjukdomar och graviditetskomplikationer
- Neoplasmer efter histologisk typ
- Neoplasmer, körtel och epitel
- Neoplastiska processer
- Urologiska neoplasmer
- Carcinom
- Sjukdomar i urinblåsan
- Patologiska tillstånd, tecken och symtom
- Icke-muskelinvasiva blåsneoplasmer
- Neoplasma, rest
- Neoplasmer i urinblåsan
Andra studie-ID-nummer
- 2026-D0029
Plan för individuella deltagardata (IPD)
Planerar du att dela individuella deltagardata (IPD)?
Läkemedels- och apparatinformation, studiedokument
Studerar en amerikansk FDA-reglerad läkemedelsprodukt
Studerar en amerikansk FDA-reglerad produktprodukt
Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .