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ACRIN 6701- Repeatability Assessment of Quantitative DCE-MRI and DWI: A Multicenter Study of Functional Imaging Standardization in the Prostate

Description

OBJECTIVES: Primary - Determine the test-retest performance, assessed by the repeatability coefficient [RC] of K^trans and gadolinium curve (IAUGC90^bn) and measured by median pixel values of the whole prostate. - Determine the test-retest performance, assessed by the RC of diffusion-weighted imaging (DWI) metrics D(t) and measured by median pixel values of the whole prostate. Secondary - Determine the test-retest performance, assessed by RC of K^trans, IAUGC90^bn, and D(t), and measured by median pixel values of the dominant prostate tumor. - Determine the effect of reader on the RC of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) and DWI metrics for whole prostate and tumor nodule target lesion. - Determine whether T1-dependent or T1-independent methods for gadolinium quantification in DCE-MRI studies produce differing values for the RC for K^trans and IAUGC90^bn. - Explore the correlation between DCE-MRI and DWI metrics for both whole prostate and dominant tumor nodule as target lesions. (Exploratory) - Determine whether the "coffee break" approach toward test-retest analysis of quantitative DWI provides a reasonable estimate of the RC of D(t)of the whole prostate, using as the gold standard the RC of D(t) obtained between the two separate MRI visits. (Exploratory) OUTLINE: This is a multicenter study. Patients are stratified according to MRI vendor used (Siemens vs GE vs Philips). Patients receive gadolinium-based contrast IV and undergo DCE-MRI* and DWI 2 imaging at 2-14 days apart prior to treatment initiation. A central reader evaluation of the 2 successive scans is then conducted. NOTE: *At the discretion of the participating sites, the initial MRI visit (MRI SCAN 1) may be supplemented with endorectal-coil imaging per institutional norms.

Phase

N/A

Inclusion and Exclusion Criteria

  • Diagnosis of prostate adenocarcinoma by transrectal ultrasound (TRUS)-guided biopsy between 28 to 90 days prior to enrollment
  • Minimal tumor burden as defined by at least one of the following criteria:
  • One single core with ≥ 50% cancer burden and ≥ 5 mm tumor length
  • Two or more cores in the same prostate region, each with ≥ 30% cancer burden
  • Three or more cores positive for prostate cancer (of any magnitude of cancer burden) in the same prostate region
  • Gleason score of 7 or higher cancer burden
  • Prostate-specific antigen (PSA) ≥ 10 ng/mL PATIENT CHARACTERISTICS:
  • Able to tolerate magnetic resonance imaging (MRI) required by protocol, to be performed at an American College of Radiology Imaging Network (ACRIN)-qualified facility and scanner
  • Not suitable to undergo MRI or gadolinium-based contrast agent because of:
  • Severe claustrophobia not relieved by oral anxiolytics per institutional standard practice
  • Presence of MRI-incompatible metallic objects or implanted medical devices in body (including, but not limited to, non-MRI compatible metal objects, cardiac pacemaker, aneurysm clips, artificial heart valves with steel parts, or metal fragments in the eye or central nervous system)
  • Renal failure, as determined by glomerular filtration rate (GFR) < 30 mL/min based on a serum creatinine level obtained within 48 hours prior to enrollment
  • Weight greater than that allowable by the MRI table, per local institutional practice PRIOR CONCURRENT THERAPY:
  • No anti-androgenic therapy within 30 days prior to enrollment
  • No prior external-beam radiotherapy, proton radiotherapy, or brachytherapy to the prostate
  • No prior hip replacement or other major pelvic surgery

Sites

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