CTA PULM VEIN MAPPING/LEFT ATRIUM C+
(last updated 6/20/2016, last reviewed 02/10/2022)
(last updated 6/20/2016, last reviewed 02/10/2022)
INDICATION: Pre-ablation for cardiac arrythmia, preprocedural planning
SERIES
- 0.6 mm Axial CTA
- 3mm Axial Lung Windows
- 3mm Cor and Sag
- 16 mm Cor Thick MIPs (lung)
- 3D left atrium/pulm veins
| | |
|
POSITIONING/MODE
|
supine/helical |
|
kV/mA/rot time
|
120kV/Auto mA/0.5 sec |
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DETECTOR COLLIMATION
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16 x 0.75mm (S16) 64 x 0.6mm (D64) |
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SLICE THICKNESS
|
0.6 mm |
|
PITCH
|
1 to 1.5 |
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TABLE FEED
|
4.8 cm/sec (S16) 5.8 cm/sec (D64) |
|
KERNAL
|
std and lung |
|
SFOV
|
large |
|
COVERAGE
|
aortic arch -> diaphragm |
|
ACQUISITION
|
craniocaudal |
|
ORAL CONTRAST
|
none |
|
IV CONTRAST
|
90 mL Isovue 370 40 mL saline |
|
INJECTION RATE
|
3.5 to 4 mL/sec |
|
SCAN DELAY
|
Care bolus @ Ascending Aorta (100 HU or visual) ~20 sec |
|
RESPIRATION
|
Inspiration |
|
POSTPROCESSING
|
see below |
NOTES: (Using 1.5 x 0.75 axial slices) Coronal and sagittal MPRs, Volume rendered 3D, 3D MIPs of the left atrium alone. Volume rendering can be done with “cut-remove” and/or “thresholding” functions. Endoluminal view of posterior aspect of the left atrium and the entering veins and their ostia, as requested. Send to Terarecon.
For Dr. Alfonso Prieto and Dr. Guillermo Sosa-Suarez’s group please send them two discs with the source axial images (1.5 x 0.75mm) on a CD that does NOT have a DICOM viewer.
ECG gating should only be performed in patients who are in sinus rhythm. ECG gating should not be performed in patients who are NOT in sinus rhythm.
