Improve definition of titanium tandems in MR-guided high dose rate brachytherapy for cervical cancer using proton density weighted MRI

Table 2 Measured tandem diameters

Patient	Tandem Curvature	Diameter of ovoid (cm)	Measured diameter (cm)		Difference from physical diameter (cm)
			T2W	PDW	T2W	PDW
1	30°	2.0	0.42	0.37	0.075	0.025
2	30°	2.0	0.32	0.29	−0.025	−0.055
3	30°	2.0	0.35	0.31	0.005	−0.035
4	45°	2.0	0.62	0.53	0.275	0.185
5	45°	1.6	0.49	0.39	0.145	0.045
6	45°	2.5	0.79	0.58	0.445	0.235
7	45°	2.5	0.61	0.53	0.265	0.185
8	45°	1.6	0.62	0.53	0.275	0.185
9	45°	2.5	0.68	0.55	0.335	0.205
10	45°	2.0	0.52	0.39	0.175	0.045
AVE±STD			0.54±0.15	0.45±0.11	0.20±0.15	0.10±0.11
Paired student t-test			0.0003		0.0003

The curvature of the tandem, the physical diameter of the ovoid, the measured diameter of the tandem, as well as the difference between the measured diameter and the physical diameter (0.345 cm) from the T2W and PDW images for each patient are listed.

ISSN: 1748-717X