Reproducibility of Dynamic Contrast-enhanced MR Imaging. Part II. Comparison of Intra- and Interobserver Variability with Manual Region of Interest Placement versus Semiautomatic Lesion Segmentation and Histogram Analysis

Radiology ◽  
2013 ◽  
Vol 266 (3) ◽  
pp. 812-821 ◽  
Author(s):  
Tobias Heye ◽  
Elmar M. Merkle ◽  
Caecilia S. Reiner ◽  
Matthew S. Davenport ◽  
Jeffrey J. Horvath ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Interobserver Variability ◽  
Region Of Interest ◽  
Histogram Analysis ◽  
Lesion Segmentation ◽  
Dynamic Contrast Enhanced ◽  
Contrast Enhanced

Dynamic contrast – enhanced MR imaging of the stimulated pituitary gland

2004 ◽  
Vol 112 (S 1) ◽  
Author(s):  
C Maier ◽  
M Riedl ◽  
M Clodi ◽  
C Bieglmayer ◽  
V Mlynarik ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Pituitary Gland ◽  
Dynamic Contrast Enhanced ◽  
Contrast Enhanced

scholarly journals Perfusion in hand arthritis on dynamic contrast-enhanced computed tomography: a randomized prospective study using MRI as a standard of reference

2020 ◽  
Vol 50 (1) ◽  
pp. 59-68
Author(s):  
Sevtap Tugce Ulas ◽  
Kay Geert Hermann ◽  
Marcus R. Makowski ◽  
Robert Biesen ◽  
Fabian Proft ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Mean Transit Time ◽  
Region Of Interest ◽  
T Test ◽  
Dose Length Product ◽  
Suitable Alternative ◽  
Dce Mri ◽  
Dynamic Contrast Enhanced ◽  
Contrast Enhanced Ct ◽  
Contrast Enhanced

Abstract Objective To evaluate the performance of dynamic contrast-enhanced CT (DCE-CT) in detecting and quantitatively assessing perfusion parameters in patients with arthritis of the hand compared with dynamic contrast-enhanced MRI (DCE-MRI) as a standard of reference. Materials and methods In this IRB-approved randomized prospective single-centre study, 36 consecutive patients with suspected rheumatoid arthritis underwent DCE-CT (320-row, tube voltage 80 kVp, tube current 8.25 mAs) and DCE-MRI (1.5 T) of the hand. Perfusion maps were calculated separately for mean transit time (MTT), time to peak (TTP), relative blood volume (rBV), and relative blood flow (rBF) using four different decomposition techniques. Region of interest (ROI) analysis was performed in metacarpophalangeal joints II–V and in the wrist. Pairs of perfusion parameters in DCE-CT and DCE-MRI were compared using a two-tailed t test for paired samples and interpreted for effect size (Cohen’s d). According to the Rheumatoid Arthritis Magnetic Resonance Imaging Score (RAMRIS) scoring results, differentiation of synovitis-positive and synovitis-negative joints with both modalities was assessed with the independent t test. Results The two modalities yielded similar perfusion parameters. Identified differences had small effects (d 0.01–0.4). DCE-CT additionally differentiates inflamed and noninflamed joints based on rBF and rBV but tends to underestimate these parameters in severe inflammation. The total dose-length product (DLP) was 48 mGy*cm with an estimated effective dose of 0.038 mSv. Conclusion DCE-CT is a promising imaging technique in arthritis. In patients with a contraindication to MRI or when MRI is not available, DCE-CT is a suitable alternative to detect and assess arthritis.

Dynamic contrast-enhanced MR imaging of musculoskeletal tumors: Basic principles and clinical applications

1996 ◽  
Vol 6 (2) ◽  
pp. 311-321 ◽  
Author(s):  
Koenraad L. Verstraete ◽  
Henk-Jan Van der Woude ◽  
Pancras C. W. Hogendoorn ◽  
Yves De Deene ◽  
Marc Kunnen ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Clinical Applications ◽  
Basic Principles ◽  
Musculoskeletal Tumors ◽  
Dynamic Contrast Enhanced ◽  
Contrast Enhanced
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