CT Stealth Guidance

Which code would be most appropriate for CT stealth guidance for the creation of a V-P shunt?

77011 - Computed Tomography guidance for stereotactic guidance

or

61781 - Stereotactic computer-assisted procedure, cranial, intradural
61782 - Stereotactic computer-assisted procedure, cranial, extradural

Any help would be greatly appreciated.

Thanks, Sue

CT Stealth Guidance