Hybrid Modality Fusion of Planar Scintigrams and CT Topograms to Localize Sentinel Lymph Nodes in Breast Lymphoscintigraphy: Technical Description and Phantom Studies

Table 2

Measured exposure and calculated CT dose versus kVp and mAs. In CT scans, the CTDI_vol and DLP values are used to convert in-phantom ion chamber measurements to estimated effective dose in the standard CT dosimetry phantoms (μSv).

KVp	mAs	location	Exposure [R]	CTDI_vol [mGy]	DLP [mGy∗cm]	Effective dose [mSv]
80	20	center	0.00395	0.453	18.137	0.308
		Periphery	0.00928
110	10	center	0.00588	0.576	23.057	0.392
		Periphery	0.01137
110	20	center	0.01177	1.153	46.115	0.784
		Periphery	0.02274
130	20	center	0.01791	1.720	68.818	1.170
		Periphery	0.03376
130	90	center	0.08059	7.742	309.681	5.265
		Periphery	0.15192