Comparison of CT and MR (VI-RADS) Imaging for Local Bladder Cancer Staging
Prospective Diagnostic Accuracy Study Comparing CT and MRI (VI-RADS) for Local Staging of Newly Diagnosed Bladder Cancer
연구 개요
상태
상태
정황
정황
상세 설명
Accurate local staging is crucial for distinguishing non-muscle-invasive from muscle-invasive bladder cancer and guiding treatment decisions. While CT is widely used in clinical practice, MRI with VI-RADS has demonstrated higher diagnostic performance in previous retrospective and meta-analytic studies. However, prospective paired comparisons in the same patients are limited.
In this single-center prospective study, newly diagnosed bladder cancer patients undergo cystoscopy, contrast-enhanced CT, and multiparametric MRI prior to definitive histopathological sampling. Two radiologists independently assess imaging in a blinded research setting. Diagnostic performance of MRI and CT is compared using paired statistical analyses, with additional evaluation of interobserver agreement and tumor characteristics.
연구 유형
연구 유형
등록 (추정된)
등록
연락처 및 위치
연구 연락처
연구 연락처
- 이름: Study Coordinator, Department of Urology
- 전화번호: +47 22 89 40 00
- 이메일: postmottak@ous-hf.no
연구 장소
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Oslo, 노르웨이
- 모병
- Oslo University Hospital
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연락하다:
- Study Coordinator, Department of Urology
- 전화번호: +47 22 89 40 00
- 이메일: postmottak@ous-hf.no
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수석 연구원:
- Andreas Habberstad, MD, PhD
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참여기준
자격 기준
자격 기준
공부할 수 있는 나이
- 성인
- 고령자
건강한 자원 봉사자를 받아들입니다
샘플링 방법
연구 인구
The study population consists of adult patients with newly diagnosed bladder cancer identified on cystoscopy at a tertiary referral hospital. Eligible participants are patients planned for transurethral resection of the bladder tumor (TURBT) and/or cystectomy as part of standard clinical care, and who are able to undergo both contrast-enhanced computed tomography (CT) and multiparametric magnetic resonance imaging (MRI) prior to definitive histopathological assessment.
Patients are included irrespective of tumor stage or grade at presentation, provided that imaging is performed within the defined preoperative diagnostic pathway. Patients with prior bladder cancer treatment or contraindications to imaging are excluded.
설명
Inclusion Criteria:
- Age ≥ 18 years
- Newly diagnosed bladder cancer on cystoscopy
- Planned TURBT or cystectomy within 6 weeks
- Eligible for both CT and MRI within 6 weeks
- Written informed consent provided
Exclusion Criteria:
- Contraindications to MRI or iodinated contrast media
- Prior treatment for bladder cancer
- Pregnancy
- Non-malignant bladder lesions
- Tumors located in bladder diverticula
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
그룹/코호트 수
코호트 및 개입
그룹/코호트그룹/코호트 |
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Imaging Comparison Group
All participants undergo contrast-enhanced CT and multiparametric MRI (VI-RADS) as part of routine diagnostic work-up prior to transurethral resection of the bladder tumor or cystectomy.
Imaging findings are compared with histopathology for assessment of diagnostic accuracy.
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연구는 무엇을 측정합니까?
주요 결과 측정
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
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Diagnostic Accuracy for Detection of Muscle-Invasive Bladder Cancer (≥T2)
기간: From imaging to final histopathological reference standard (up to 12 months)
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The primary outcome is the diagnostic accuracy of multiparametric magnetic resonance imaging (MRI) using the Vesical Imaging-Reporting and Data System (VI-RADS) compared with contrast-enhanced computed tomography (CT) for the detection of muscle-invasive bladder cancer (pathological stage ≥T2).
Sensitivity and specificity will be calculated using histopathology from transurethral resection of the bladder tumor, re-TURBT, and/or cystectomy as the reference standard.
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From imaging to final histopathological reference standard (up to 12 months)
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2차 결과 측정
2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
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Positive and Negative Predictive Values
기간: From imaging to final histopathological reference standard (up to 12 months)
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Positive predictive value (PPV) and negative predictive value (NPV) of MRI (VI-RADS) and CT for detection of muscle-invasive bladder cancer (≥T2), calculated using histopathology as the reference standard.
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From imaging to final histopathological reference standard (up to 12 months)
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Interobserver Agreement for MRI and CT Tumor Staging
기간: During blinded image evaluation following imaging acquisition
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Interobserver agreement between two independent radiologists for MRI VI-RADS scoring and CT-based T-stage assessment, quantified using weighted kappa statistics in a blinded research reading setting.
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During blinded image evaluation following imaging acquisition
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Proportion of correctly classified Tumor T-stage (Ta-T4) by MRI and CT
기간: From imaging to final histopathological reference standard (up to 12 months)
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Proportion of correctly classified tumor T-stage (Ta-T4) by MRI and CT compared with histopathological staging from TURBT and/or cystectomy.
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From imaging to final histopathological reference standard (up to 12 months)
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Diagnostic accuracy of MRI and CT for detection of muscle-invasive bladder cancer within tumor subgroups
기간: From imaging to final histopathological reference standard (up to 12 months)
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Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of MRI and CT for detection of muscle-invasive bladder cancer, assessed within predefined tumor subgroups (tumor size, morphology, tumor location and multiplicity), using histopathology as the reference standard.
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From imaging to final histopathological reference standard (up to 12 months)
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공동 작업자 및 조사자
수사관
수사관
- 수석 연구원: Andreas Habberstad, MD, PhD, Oslo University Hospital
연구 기록 날짜
연구 주요 날짜
연구 시작 (실제)
연구 시작
기본 완료 (추정된)
기본 완료
연구 완료 (추정된)
연구 완료
연구 등록 날짜
최초 제출
최초 제출
QC 기준을 충족하는 최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (실제)
처음 게시됨
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
마지막 업데이트 게시됨
QC 기준을 충족하는 마지막 업데이트 제출
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
추가 관련 MeSH 약관
기타 연구 ID 번호
기타 연구 ID 번호
- 970903
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