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Fletcher Allen Health Care carotid, CTA

Philips CT Clinical Science Philips Healthcare USA

Clinical AreaNeck
ExamCardCarotid, CTA
InstitutionFletcher Allen Health Care
Publication DateSep 1, 2004
ScannerBrilliance 40 Channel Version: Brilliance Version 1.2
Carotid, CTA
Scan 1Injection protocol
Scan 2Surview
Scan 3Time lapse locator series
Scan 4Time lapse tracker series
Scan 5Contrast scan
Scan 6Post processing visualization
Scan 7Post processing visualization

Injection protocol
Power InjectorYes with time lapse
RouteRAC/LAC non-affected side
Size of Angiocath20 G / 18 G preferred
Contrast TypeOmnipaque / Isovue
Amount of Contrast100 ml total; 10-12 ml of this used for time lapse
Concentration of Contrast350 mg/ml or 370 mg/ml
Contrast Injection Rate6.0 ml/sec male5.0 ml/sec female
Amount of Saline50 ml
Saline Injection Rate5.0 ml/sec
TipsDelay is depended on time lapse series

Landmark - Head FirstMid sternum: internal laser
Length of Surview500 mm
TipsVertical laser mid neckInjection arm straightened and elevated on 1 or 2 pillows above heart level with arms on chest; use straps to secure arms.

Time Lapse Locator Series
Scan LocationCarotid arteries

Time Lapse Tracker Series
Contrast Amount10-12 (2 seconds for total injection) at 6ml/sec for female and 7ml/sec male
Number of Scans25
Trigger DelayScan is triggered based on results from time lapse tracking series. *see tips
Tips*To avoid venous contamination: use 6 ml/sec for males and 5ml/sec for females. Venous contamination usually occurs in approximately 7 to 10 seconds

Contrast Scan
Scan ModeHelical
Collimation40 x 0.625
FOV120-160 mm (adjust with evolving)
Thickness0.9 mm
Increment0.45 mm
Rotation Time0.5 sec
FilterB - Standard
Window/Level600/100 Soft tissue
Scan DirectionInferior to superior
CoverageArch to Circle of Willis
Approximate Scan Time< 11 seconds
Additonal ReconstructionsAxialFilter: A - SmoothSend to workstation
Planar Generated Data SetsSee post processing visualization
Images to PACSRaw images .9mm

Post Processing Visualization
ApplicationWorkspace - CT Viewer
RenderingMIP (must visualize stent lumen)
OrientationCoronal: 10 x 2'sSagittal: 10 x 2's Oblique: 10 x 2'sOptional-Stent: 2 x 1's
Images to PACSCoronal: 10 x 2'sSagittal: 10 x 2'sOblique: 10 x 2'sOptional-Stent 2 x 1's

Post Processing Visualization
ApplicationWorkspace - CT Viewer
RenderingVolume/Carotid artery preset. Isolate mid carotid arteries by using bone removal and or clipping tools. Perform oblique orientation to visualize and highlight left and right carotid bifurcation in batch series
OrientationCine loop of each carotid artery
Images to PACSBatch/Cine of each carotid artery

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Aug 1, 2005

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Brilliance 40-channel
Brilliance Version 1.2, carotids, CT Viewer, MIP, Neck, Neuro, Vascular

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