AJR
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Abstract Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Ersoy, H.
Right arrow Articles by Rybicki, F.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Ersoy, H.
Right arrow Articles by Rybicki, F.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati  
What's this?
Hotlight (NEW!)
Right arrow
What's Hotlight?

Time-Resolved MR Angiography: A Primary Screening Examination of Patients with Suspected Pulmonary Embolism and Contraindications to Administration of Iodinated Contrast Material

Hale Ersoy1, Samuel Z. Goldhaber2, Tianxi Cai3, Tuan Luu1, Joshua Rosebrook1, Robert Mulkern4 and Frank Rybicki1

1 Cardiovascular Imaging Section, Department of Radiology, Brigham and Women's Hospital and Harvard Medical School, 75 Francis St., ASB I-L1-004, Boston, MA 02115.
2 Division of Cardiovascular Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA.
3 Department of Biostatistics, Harvard School of Public Health, Boston, MA.
4 Department of Radiology, Children's Hospital and Harvard Medical School, Boston, MA.


Figure 1
View larger version (166K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 1 —46-year-old man with retrosternal chest pain and increasing shortness of breath for past 2 hours. Three-dimensional time-resolved pulmonary MR angiogram (TE/TR, 3.5/1.3; bandwidth, ± 62.5 kHz; flip angle, 35°, 30 partitions with effective thickness of 3 mm; matrix size, 256 x 192; scan time, 41 seconds) shows nine temporally resolved phases acquired with single breath-hold. Fourth phase has best image quality, as was true for most patients in this study.

 

Figure 2
View larger version (144K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 2A —54-year-old man who underwent right antecubital vein injection and had unknown central venous thrombosis. Fifth phase of acquisition of coronal time-resolved 3D MR angiogram shows poor enhancement of pulmonary arteries (open arrows) due to slow venous flow from collateral veins.

 

Figure 3
View larger version (158K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 2B —54-year-old man who underwent right antecubital vein injection and had unknown central venous thrombosis. Contrast-enhanced equilibrium phase 3D fast gradient-echo image shows thrombosis (arrows) of central veins.

 

Figure 4
View larger version (142K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 3A —49-year-old woman with hypercoagulable state, shortness of breath, and bilateral leg swelling who underwent MR angiography followed by pulmonary embolism CT angiography within 24 hours. Coronal 3D MR angiogram (A) and source image from fourth phase of acquisition (B) show filling defect in left lower lobe artery (arrow).

 

Figure 5
View larger version (131K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 3B —49-year-old woman with hypercoagulable state, shortness of breath, and bilateral leg swelling who underwent MR angiography followed by pulmonary embolism CT angiography within 24 hours. Coronal 3D MR angiogram (A) and source image from fourth phase of acquisition (B) show filling defect in left lower lobe artery (arrow).

 

Figure 6
View larger version (133K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 3C —49-year-old woman with hypercoagulable state, shortness of breath, and bilateral leg swelling who underwent MR angiography followed by pulmonary embolism CT angiography within 24 hours. Coronal reformatted image from CT angiography confirms presence of pulmonary embolism (arrow) in anatomic area identical to A and B.

 

Figure 7
View larger version (63K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 4A —56-year-old woman with chest pain, dyspnea, and lower extremity edema referred for pulmonary MR angiography. Intermediate-probability ventilation (A)-perfusion (B) lung scan obtained within 24 hours of MR angiography shows moderate ventilation-perfusion mismatch (curved arrow, B) in superior segment of right lower lobe.

 

Figure 8
View larger version (43K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 4B —56-year-old woman with chest pain, dyspnea, and lower extremity edema referred for pulmonary MR angiography. Intermediate-probability ventilation (A)-perfusion (B) lung scan obtained within 24 hours of MR angiography shows moderate ventilation-perfusion mismatch (curved arrow, B) in superior segment of right lower lobe.

 

Figure 9
View larger version (151K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 4C —56-year-old woman with chest pain, dyspnea, and lower extremity edema referred for pulmonary MR angiography. 3D MR angiographic image shows persistent partial filling defect (arrow) in right lower lobe pulmonary artery.

 

Figure 10
View larger version (129K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 4D —56-year-old woman with chest pain, dyspnea, and lower extremity edema referred for pulmonary MR angiography. 3D MR angiographic source image shows abrupt cutoff of superior segmental branch of right lower lobe artery (open arrow).

 

Figure 11
View larger version (132K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 5A —57-year-old man with chest pain, shortness of breath, and known renal cell carcinoma. 3D MR angiographic image shows no pulmonary embolism in pulmonary arterial system.

 

Figure 12
View larger version (157K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 5B —57-year-old man with chest pain, shortness of breath, and known renal cell carcinoma. Contrast-enhanced equilibrium phase 3D fast gradient-echo image shows tumor plaque (arrow) in bronchus intermedius as result of direct invasion through subcarinal metastatic renal cell carcinoma. Atelectasis (open arrows) of right middle and right lower lobes also is evident.

 

Figure 13
View larger version (17K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 6 —Drawing shows k-space segmentation for elliptic centric phase ordering for 3D time-resolved imaging of contrast kinetics MR angiographic acquisition. Segment A represents center of k-space (contrast enhancement). Segments B, C, and D represent periphery of k-space. kz = slice-encoding direction, ky = phase-encoding direction.

 

Figure 14
View larger version (27K):
[in this window]
[in a new window]
[as a PowerPoint slide]
  		Fig. 7 —Schematic shows temporal interpolation and view-sharing algorithm used for reconstruction of time-resolved MR angiographic images.

 

Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati    What's this?



HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2007 by the American Roentgen Ray Society.