Image Quality and Patient-Specific Organ Doses in Stone Protocol CT: A Comparison of Traditional CT to Low Dose CT with Iterative Reconstruction

Table 3

CT radiation dose estimates and differences between modalities.

	FBP-CT	IR-CT	(%)	p value
	(n=250)	(n=90)
OSD Stomach (mGy)			18.1 (62)	p < .001
OSD Small bowel (mGy)			13.8 (60)	p < .001
OSD Colon (mGy)			14.7 (61)	p < .001
OSD Skin (mGy)			18.7 (54)	p < .001
dose (mGy)			15.0 (52)	p < .001

Key: CT, computed tomography; FBP, filtered back projection; IR, iterative reconstruction; SD, standard deviation; OSD: organ specific dose; : measured volumetric CT dose index.