Ann: 4DMedical files FDA submission for CTVQ, page-23

1. “CYC’s SPECT scan is better” – Is it really?

That depends on what you’re measuring:

	Feature	CYC SPECT	4DX CT:VQ™
1	Imaging Type	Nuclear medicine	Non-contrast CT + Software
2	Radiation	Requires radioactive tracers	No radiotracers, CT only
3	Image Resolution	Moderate (gamma camera)	High (CT-based)
4	Workflow	Complex, requires nuclear dept	Simplified, uses standard CT
5	Patient Throughput	Slower (60–90 min/patient)	Faster (integrated into CT)
6	Infrastructure Dependency	Needs specialised equipment	Uses existing CT scanners
7	Scalability	Limited to equipped sites	14,500+ CTs in U.S. alone