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Improved detection of localized prostate cancer using co-registered MRI and 11C-acetate PET/CT.

Abstract：

OBJECTIVES:We aimed to study the ability of contrast enhanced MRI at 1.5 T and 11C-acetate PET/CT, both individually and using fused data, to detect localized prostate cancer. METHODS:Thirty-six men with untreated prostate cancer and negative for metastatic disease on pelvic CT and bone scan were prospectively enrolled. A pelvic 11C-acetate PET/CT scan was performed in all patients, and a contrast enhanced MRI scan in 33 patients (6 examinations using both endorectal coil and surface coils, and 27 examinations using surface coils only). After the imaging studies 10 patients underwent prostatectomy and 26 were treated by image guided external beam radiation treatment. Image fusion of co-registered PET and MRI data was performed based on anatomical landmarks visible on CT and MRI using an advanced in-house developed software package. PET/CT, MRI and fused PET/MRI data were evaluated visually and compared with biopsy findings on a lobar level, while a sextant approach was used for patients undergoing prostatectomy. RESULTS:When using biopsy samples as method of reference, the sensitivity, specificity and accuracy for visual detection of prostate cancer on a lobar level by contrast enhanced MRI was 85%, 37%, 73% and that of 11C-acetate PET/CT 88%, 41%, 74%, respectively. Fusion of PET with MRI data increased sensitivity, specificity and accuracy to 90%, 72% and 85%, respectively. CONCLUSIONS:Fusion of sequentially obtained PET/CT and MRI data for the localization of prostate cancer is feasible and superior to the performance of each individual modality alone.

journal_name

Eur J Radiol

journal_title

European journal of radiology

authors

Jambor I,Borra R,Kemppainen J,Lepomäki V,Parkkola R,Dean K,Alanen K,Arponen E,Nurmi M,Aronen HJ,Minn H

doi

10.1016/j.ejrad.2011.12.043

subject

Has Abstract

pub_date

2012-11-01 00:00:00

pages

2966-72

issue

11

eissn

0720-048X

issn

1872-7727

pii

S0720-048X(12)00024-1

journal_volume

81

pub_type

杂志文章

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