Whole Prostate Volume and Shape Changes with the Use of an Inflatable and Flexible Endorectal Coil

Table 2

Whole prostate volume, PSA density, and maximum AP, LR, and CC prostate dimensions measured using T2 weighted MR images acquired with and without ERC.

	ERC	Non-ERC	Difference; (ERC-nonERC)	Percentage difference over non-ERC
Whole prostate volume (mL)
Mean ± std. dev.	57.9 ± 29.2	57.5 ± 28.4	0.4 ± 3.1	0.6 ± 5.7
Median	50.2	50.6	0.1	0.5
Range	17.4–146	17.7–139	−6.0–12.0	−12.2–16.7
PSA density (ng/mL)
Mean ± std. dev.	0.246 ± 0.583	0.245 ± 0.563	0.001 ± 0.026	−0.2 ± 5.6
Median	0.146	0.143	0.000	−0.3
Range	0.027–5.16	0.028–4.97	−0.075–0.19	−14.3–13.9
Maximum anterior posterior distance (mm)
Mean ± std. dev.	31.5 ± 8.2	34.4 ± 8.0	−2.9 ± 2.5	−8.6 ± 7.8
Median	30.4	32.4	−2.7	−8.1
Range	18.6–50.6	20.7–52.8	−8.9–2.50	−9.7–21.1
Maximum left to right distance (mm)
Mean ± std. dev.	51.0 ± 6.8	48.9 ± 6.8	2.1 ± 2.6	4.5 ± 5.8
Median	51.1	48.9	2.0	4.1
Range	33.1–68.6	31.2–65.1	−3.4–11.1	−7.4–26.0
Maximum craniocaudal distance (mm)
Mean ± std. dev.	42.8 ± 8.3	39.6 ± 8.5	3.2 ± 2.6	8.8 ± 7.0
Median	41.6	37.9	3.1	8.1
Range	23.9–62.8	21.5–59.6	−5.27–9.5	−8.84–26.7