Assessment of Diagnostic and Prognostic VALue, Identification of bIological Correlates, and Determination of TEchnical Performance of Novel Metabolic and Microstructural MRI in PROstate Cancer
试验速览
- 阶段
- 不适用
- 入组人数
- 234
- 试验地点
- 1
- 主要终点
- ProVal Primary Objective
研究概览
简要总结
For 50 years the diagnosis of prostate cancer has been with Prostate Specific Antigen (PSA) blood testing and prostate biopsy. However, this approach resulted in over-diagnosis, over-treatment and missed clinical important cancers. Multi-parametric MRI (mp-MRI) has provided a solution to some of these issues and the National Institute for health and Care Excellence has advocated the use of mp-MRI before biopsy in men with a suspicion for prostate cancer.
However, important challenges remain and the current way we pick up and assess prostate cancer can be improved. mp-MRI can miss significant cancer in around 11% of cases, 30% of positive MRI scans turn out not to have significant cancer at biopsy. Lastly, 34% of mp-MRI lesions are scored as in-determinant which sometimes makes decisions for further investigation and treatment unclear.
There are also difficulties predicting patients who will have progression of their disease or those who will not suffer harm from their cancer. Therefore the development of non-invasive tests and markers that can tell apart aggressive and non-aggressive disease would be extremely useful in deciding what treatment approach suits individual patients.
This study will investigate the use of three different novel MRI methods; Vascular, extracellular and restricted diffusion for cytometry in tumours (VERDICT), Luminal Imaging (LI) and hyperpolarised [1-13C]-pyruvate MRI (HYP-MRI). These scans help us to look at the microstructure as well as the metabolism of prostate tissue and may offer ways to better differentiate aggressive vs non-aggressive disease.
These scans will be performed in men with prostate cancer suitable for active surveillance at baseline and 1 year later to assess for prognostic indicators for progression in early prostate cancer.HYP-MRI will also be performed in men undergoing radical prostatectomy for validation of image findings and pathology. Whilst some men will have repeat scanning to asses for the repeatability of these techniques.
详细描述
PURPOSE AND DESIGN
The purpose of this study is to assess the ability of novel MRI techniques and their derived metrics in the diagnosis and prognostication of prostate cancer. Improving the diagnostic accuracy and investigating biomarkers with non- invasive MRI techniques have the promise of reducing unnecessary biopsies or radical treatment, as well as detecting those likely to progress at an earlier stage.
Vascular, Extracellular and Restricted Cytometry in Tumours (VERDICT) MRI
Diffusion-weighted imaging (DWI) is one of the most important sequences in mp-MRI of the prostate which reflects the diffusivity of water in cells and differs in cancerous tumour due to changes in cellular density, size, shape and arrangement. VERDICT is a novel framework which uses a more complex 3-compartment tissue model for diffusion of water; 1. Water trapped in cells, 2. Water in the vascular network and 3. Interstitial water. This allows us to make estimates of specific tissue properties such as the size and packing density of the cells, the vascular extracellular- extravascular space (EES) volume fractions. This methods is more biologically specific compared to conventional DWI. Studies in tumour xenograft models of colorectal cancer showed its ability to detect such known differences in the microstructure. At UCL we have applied VERDICT to the prostates of 78 men and were able to successfully differentiate between benign or clinically insignificant cancer and clinically significant tumours. This technique can be applied on commercially available MRI scanners and requires no additional contrast agents or requirements for the patient compared to conventional mp-MRI of the prostate.
Luminal Index (LI) MRI
研究设计
- 研究类型
- Observational
- 观察模型
- Case Only
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- Male
- 接受健康志愿者
- 否
入选标准
- •Men aged >18 years
- •Pre-biopsy mp-MRI study performed within preceding 4 months
- •Likert/PIRADS score 4-5/5 lesion and/or biopsy confirmed Prostate cancer
- •Willing and able to provide written informed consent
排除标准
- •Men who suffer with claustrophobia or are unable to have an MRI e.g. implantable defibrillator, brain aneurysm clips or other implant, severe obesity or unable to lay still for length of scan.
- •Men with an impaired renal function (eGFR <30)
- •Previous prostate radiotherapy/focal treatment
- •Hormonal treatment for prostate cancer within preceding 3 months from consenting to the study.
- •Dementia or other neurological condition meaning participant lacks the capacity to consent.
结局指标
主要结局
ProVal Primary Objective
时间窗: 3 years
To determine the prognostic value of 13C-HYP-MRI for risk classification of patients with early prostate cancer suitable for active surveillance. Quantitive value: Lactate and pyruvate ratio parameters.
BioVal Primary Objective
时间窗: 3 years
To estimate the association of 13C-HYP-MRI derived quantitative metrics against histological features of prostate cancer. Quantitive value: Gleason Grade
TecVal Primary Objective
时间窗: 3 years
Inter-site repeatability and intra-site reproducibility of signals derived from VERDICT, Luminal Index MRI and 13C-pyruvate HYP-MRI in men with known prostate cancer. Metric: Repeatability and reproducibility co-efficients
次要结局
- ProVal Secondary Objective(3 year)