Macrocyclic paramagnetic agents for MRI: Determinants of relaxivity and strategies for their improvement

2016 ◽  
Vol 78 (4) ◽  
pp. 1523-1532 ◽  
Author(s):  
Alberto Fringuello Mingo ◽  
Sonia Colombo Serra ◽  
Simona Baroni ◽  
Claudia Cabella ◽  
Roberta Napolitano ◽  
...  
Keyword(s):  
Paramagnetic Agents

scholarly journals Single-Sided Portable NMR Investigation to Assess and Monitor Cleaning Action of PVA-Borax Hydrogel in Travertine and Lecce Stone

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3697
Author(s):  
Valeria Stagno ◽  
Chiara Genova ◽  
Nicole Zoratto ◽  
Gabriele Favero ◽  
Silvia Capuani
Keyword(s):  
Pore Size ◽  
Experimental Conditions ◽  
Non Invasive ◽  
Bedding Planes ◽  
Paramagnetic Impurities ◽  
Two Samples ◽  
Action Time ◽  
Paramagnetic Agents ◽  
Portable Nmr ◽  
Non Destructive

In this work, we investigated the potential of PVA-borax hydrogel for cleaning limestones and the dependence of the cleaning on the porosity of the rock and on the action time of the hydrogel treatment. Towards this goal, we used a nuclear magnetic resonance (NMR) spectrometer, developed for non-invasive and non-destructive applications on cultural heritage. T2-NMR parameters were quantified on different samples of Lecce stone and Travertine cut perpendicular (Pe) and parallel (Pa) to the bedding planes under different experimental conditions: untreated samples, treated with Paraloid B72 and cleaned with PVA-PEO-borax hydrogel applied for 4 min and 2 h. The T2 results suggest that the effectiveness of the cleaning strongly depended on the porosity of the stones. In Lecce stone, the hydrogel seemed to eliminate both the paramagnetic impurities (in equal measure with 4 min and 2 h treatment) and Paraloid B72. In Travertine Pe, characterized by a smaller pore size compared to Lecce stone, no significant effects were found regarding both the cleaning and the treatment with Paraloid B72. In Travertine Pa, characterized by a larger pore size than the other two samples, the hydrogel seemed to clean the paramagnetic agents (it worked better if applied for a longer time) but it did not appear to have any effect on Paraloid B72 removal.

Paramagnetic agents for contrast-enhanced NMR imaging: a review

1983 ◽  
Vol 141 (6) ◽  
pp. 1209-1215 ◽  
Author(s):  
VM Runge ◽  
JA Clanton ◽  
CM Lukehart ◽  
CL Partain ◽  
AE James
Keyword(s):  
Nmr Imaging ◽  
Contrast Enhanced ◽  
Paramagnetic Agents

Paramagnetic agents for contrast-enhanced NMR imaging: A review

1984 ◽  
Vol 2 (2) ◽  
pp. 156 ◽  
Author(s):  
Val M. Runge ◽  
Jeffrey A. Clanton ◽  
Charles M. Lukehart ◽  
C.Leon Partain ◽  
A.Everette James
Keyword(s):  
Nmr Imaging ◽  
Contrast Enhanced ◽  
Paramagnetic Agents

scholarly journals Imaging analysis for multiple paramagnetic agents using OMRI and electrophoresis

2021 ◽  
Author(s):  
Ayano Enomoto ◽  
Nao Kato ◽  
Naomi Shirouzu ◽  
Chihiro Tamura ◽  
Kazuhiro Ichikawa
Keyword(s):  
Imaging Analysis ◽  
Paramagnetic Agents

scholarly journals The role of imaging in the diagnosis of primary prostate cancer

2016 ◽  
Vol 9 (2_suppl) ◽  
pp. 11-17 ◽  
Author(s):  
Hugh Harvey ◽  
Nandita M deSouza
Keyword(s):  
Prostate Cancer ◽  
Reporting System ◽  
Ultrasound Elastography ◽  
Future Studies ◽  
Primary Prostate Cancer ◽  
Paramagnetic Agents ◽  
Magnetic Resonance Imaging Mri ◽  
A New Technique ◽  
Future Utility

Ultrasound and magnetic resonance imaging (MRI) are key imaging modalities in prostate cancer diagnosis. MRI offers a range of intrinsic contrast mechanisms (T2, diffusion-weighted imaging (DWI), MR spectroscopy (MRS)) and extrinsic contrast-generating options based on tumour vascular state following injection of weakly paramagnetic agents such as gadolinium. Together these parameters are referred to as multiparametric (mp)MRI and are used for detecting and guiding biopsy and staging prostate cancer. Although sensitivity of mpMRI is <75% for disease detection, specificity is >90% and a standardised reporting system together with MR-guided targeted biopsy is the optimal diagnostic pathway. Shear wave ultrasound elastography is a new technique which also holds promise for future studies. This article describes the developments in imaging the primary site of prostate cancer and reviews their current and future utility for screening, diagnosis and T-staging the disease.

Sign in / Sign up

Export Citation Format

Share Document