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Overview
Overview content for Cone Beam CT is not yet available.
Pre-Procedure
Indications:
• Liver directed therapy
• Prostate artery embolization
• Vertebral augmentation
• Gastrostomy tubes without preoperative cross sectional imaging
• Celiac plexus neurolysis
• Difficult nephrostomy tube access
• And more
How to achieve high quality cone-beam CT - REPETITION
Perform cone-beam CT routinely to get you and staff trained and comfortable
Procedure
Room and patient setup:
• Light sedation vs local only – important for breath holding
• Coach patient on breathing in preprocedural area
• IV location: left arm, away from elbow or locations predisposed to kinking
• BP cuff: left arm or on leg
• Arms by side but not tucked or restrained to allow for quick arms-up position
• C-arm position: left side of patient (as opposed to prop spin) - helps avoid C-arm getting caught on tubes and lines
• Femoral access may be easier for some operators
Cone-beam CT parameters
• Motion trumps photons
• Choose spin with shortest acquisition time
• Low-dose spins may provide better pictures than high dose/high quality spin because of shorter acquisition times
• Breath hold on end expiration
Injection tips - suggests below were taken from Episode 51 - Cone Beam CT Techniques
• Delay time: time from contrast injection to spin acquisition beginning
• 8 second delay for mCRC – parenchymal phase
• Goal: injections with antegrade flow without reflux
Dr. Bourgeois’ approximate injections for right and left lobe
• Dr. Bourgeois’ approximate right hepatic artery: 2.5 mL/s for 25 ml (or 2.0 for 20)
• Dr. Bourgeois’ approximate left hepatic artery: 1 mL/s for 10 ml (or 1.5 for 15)
• Shorter delay times between 2-4 seconds if interested in arterial anatomy or hypervascular tumors
Dr. Beck's approximate injections for right and left lobe
• Injection rates for mCRC: RHA: 2 ml/s for 22 mL with 6 second delay
• Injection rates for mCRC: LHA: 1 ml/s for 11 mL with 6 second delay
Equipment
• Microcatheter
• High Pressure: 1200 PSI
• Shorter length allows for slightly better flow rates
• 130cm length as opposed to 150 cm from wrist
• If using shorter endhole catheter (65 cm instead of 80 cm), can try using 110 cm microcatheter
Contrast
• Contrast dilution: typically 50:50 dilution
• Examples: 50 mL contrast and 50 cc normal saline
• Agitate contrast mixture occasionally so that saline and contrast mix well
Post-Procedure
Post-procedure content for Cone Beam CT is not yet available.
Related Procedures
No related procedures.
References
[1] Lucatelli P, Argirò R, Bascetta S, et al. Single injection dual phase CBCT technique ameliorates results of trans-arterial chemoembolization for hepatocellular cancer. Transl Gastroenterol Hepatol. 2017;2:83. Published 2017 Oct 24. doi:10.21037/tgh.2017.10.03
[2] Wallace MJ, Kuo MD, Glaiberman C, et al. Three-dimensional C-arm cone-beam CT: applications in the interventional suite. J Vasc Interv Radiol. 2008;19(6):799‐813. doi:10.1016/j.jvir.2008.02.018
[3] Issacson A. Get familiar with PAE. Interventional Oncology Learning. Available from
