scholarly journals MR imaging of iliofemoral peripheral vascular calcifications using proton density-weighted, in-phase three-dimensional stack-of-stars gradient echo

2016 ◽  
Vol 77 (6) ◽  
pp. 2146-2152 ◽  
Author(s):  
Marcos P. Ferreira Botelho ◽  
Ioannis Koktzoglou ◽  
Jeremy D. Collins ◽  
Shivraman Giri ◽  
James C. Carr ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Three Dimensional ◽  
Proton Density ◽  
Peripheral Vascular ◽  
Gradient Echo ◽  
Vascular Calcifications ◽  
Stack Of Stars

Experimental intracerebral and subarachnoid/intraventricular haemorrhages: MR detectability at 0.5 T and 1.5 T

2002 ◽  
Vol 43 (5) ◽  
pp. 464-473
Author(s):  
M. Alemany Ripoll ◽  
R. Raininko
Keyword(s):  
Cerebrospinal Fluid ◽  
Mr Imaging ◽  
Spin Echo ◽  
Autologous Blood ◽  
Pulse Sequences ◽  
Proton Density ◽  
Gradient Echo ◽  
The Brain ◽  
Formalin Fixed

Purpose: To compare the detectability of small experimental intracranial haemorrhages on MR imaging at 0.5 T and 1.5 T, from hyperacute to subacute stages. Material and Methods: 1 ml of autologous blood was injected into the brain of 15 rabbits to create intraparenchymal haematomas. Since the blood partially escaped into the cerebrospinal fluid (CSF) spaces, detectability of subarachnoid and intraventricular blood was also evaluated. MR imaging at 0.5 T and at 1.5 T was repeated up to 14 days, including T1-, proton density- and T2-weighted (w) spin-echo (SE), FLAIR and T2*-w gradient echo (GE) pulse sequences. The last MR investigation was compared to the formalin-fixed brain sections in 7 animals. Results: The intraparenchymal haematomas were best revealed with T2*-w GE sequences, with 100% of sensitivity at 1.5 T and 90–95% at 0.5 T. Blood in the CSF spaces was significantly ( p < 0.05) better detected at 1.5 T with T2*-w GE sequences and detected best during the first 2 days. The next most sensitive sequence for intracranial blood was FLAIR. SE sequences were rather insensitive. Conclusion: 1.5 T equipment is superior to 0.5 T in the detection of intracranial haemorrhages from acute to subacute stages. T2*-w GE sequences account for this result but other sequences are also needed for a complete examination.

Experimental hyaline cartilage lesions: Two-dimensional spin-echo versus three-dimensional gradient-echo MR imaging

1991 ◽  
Vol 1 (6) ◽  
pp. 665-672 ◽  
Author(s):  
Gerhard Adam ◽  
Claus Nolte-Ernsting ◽  
Andreas Prescher ◽  
Markus Bühne ◽  
Kira Bruchmüller ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Hyaline Cartilage ◽  
Spin Echo ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Gradient Echo ◽  
Cartilage Lesions

scholarly journals Measurement of lesion area and volume by three-dimensional spoiled gradient-echo MR imaging in osteonecrosis of the femoral head

2003 ◽  
Vol 21 (5) ◽  
pp. 850-858 ◽  
Author(s):  
Yuki Kishida ◽  
Takashi Nishii ◽  
Nobuhiko Sugano ◽  
Katsuyuki Nakanishi ◽  
Takashi Sakai ◽  
...  
Keyword(s):  
Femoral Head ◽  
Mr Imaging ◽  
Three Dimensional ◽  
Gradient Echo ◽  
Lesion Area ◽  
Spoiled Gradient Echo ◽  
Area And Volume
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