Time-resolved MR imaging by automatic data segmentation

1994 ◽  
Vol 4 (2) ◽  
pp. 189-196 ◽  
Author(s):  
Jill O. Fredrickson ◽  
Norbert J. Pelc
Keyword(s):  
Mr Imaging ◽  
Time Resolved ◽  
Automatic Data ◽  
Data Segmentation

112 Time resolved dose calculations for proton therapy based on internally gated 4D MR imaging

2005 ◽  
Vol 76 ◽  
pp. S60
Author(s):  
M. von Siebenthal ◽  
P. Cattin ◽  
A. Lomax ◽  
G. Székely
Keyword(s):  
Mr Imaging ◽  
Proton Therapy ◽  
Dose Calculations ◽  
Time Resolved

Anomaly Detection in Quasi-Periodic Time Series based on Automatic Data Segmentation and Attentional LSTM-CNN

2021 ◽  
pp. 1-1
Author(s):  
Fan Liu ◽  
Xingshe Zhou ◽  
Jinli Cao ◽  
Zhu Wang ◽  
Tianben Wang ◽  
...  
Keyword(s):  
Time Series ◽  
Anomaly Detection ◽  
Automatic Data ◽  
Data Segmentation ◽  
Periodic Time Series

Time-resolved gadolinium-enhanced MR imaging of the breast: Impact on accuracy of diagnosis of breast carcinoma.

2013 ◽  
Vol 31 (26_suppl) ◽  
pp. 33-33
Author(s):  
Hanan Sherif ◽  
Amal Al-Obaidly ◽  
Issam Albosom ◽  
Ahmed-Emad Mahfouz
Keyword(s):  
Breast Carcinoma ◽  
Mr Imaging ◽  
Predictive Value ◽  
Maximum Intensity Projection ◽  
Breast Lesions ◽  
Mr Images ◽  
Time Resolved ◽  
Malignant Breast ◽  
Projection Images ◽  
Malignant Lesions

33 Background: The purpose of the study is to differentiate benign and malignant breast lesions based on very early enhancement of the lesion on time-resolved gadolinium-enhanced MR imaging. Methods: 100 women with breast lesions were examined at 1.5 T (Siemens, Erlangen, Germany), by fast T1-weighted GRE images every 5 s for 1 min after injection of Gd-DOTA (Dotarem, Guerbet, France), followed by 5 spacially-resolved MR image series every 30 s. Images were subtracted; maximum-intensity-projection images were obtained; and images were randomized and reviewed by two blinded readers, who reviewed only the spacially-resolved MR images and gave BIRADS diagnosis. After one month, they evaluated only the time-resolved MR images and noted the time of first appearance of enhancement. Results: The patients had 249 enhancing lesions: 66 malignant on histopathology and 183 benign on basis of histopathology or 1-year imaging follow-up. On time-resolved MR imaging, 15 lesions enhanced at 0-5 s (all malignant), 23 at 5-10 s (21 malignant, 2 benign), 34 at 10-15 s (28 malignant, 6 benign), and 117 at 15-20 s (2 malignant, 115 benign). All malignant lesions enhanced before 20 s. Taking 15s as the cut-off point, early enhancement had sensitivity of 96.9%, specificity of 95.6%, positive predictive value of 88.8%, negative predictive value of 98.8%, and accuracy of 95.9% for diagnosis of carcinoma. Enhancement before 15 s corrected BIRADS diagnosis of the spacially-resolved MR imaging in 14 lesions (5.6%). Conclusions: Lesion enhancement in the first 15s on time-resolved MR imaging is a useful sign for the diagnosis of breast carcinoma.

5474067 Method for time-resolved MR-imaging

1996 ◽  
Vol 14 (5) ◽  
pp. IX
Author(s):  
Gerhard Laub
Keyword(s):  
Mr Imaging ◽  
Time Resolved

Time-Resolved Three-Dimensional MR Imaging of Gastric Emptying Modified by IV Administration of Erythromycin

2003 ◽  
Vol 180 (5) ◽  
pp. 1305-1310 ◽  
Author(s):  
Thomas C. Lauenstein ◽  
Florian M. Vogt ◽  
Christoph U. Herborn ◽  
Armin DeGreiff ◽  
Jörg F. Debatin ◽  
...  
Keyword(s):  
Gastric Emptying ◽  
Mr Imaging ◽  
Three Dimensional ◽  
Time Resolved
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