Development and implementation of an ultralow-dose CT protocol for the assessment of cerebrospinal shunts in adult hydrocephalus

European Radiology Experimental

Table 2 Objective image noise: pure versus hybrid iterative reconstruction

Anatomical cavity	Mean IN-pure IR	Mean IN-hybrid IR	Noise reduction	p-value
Head	7.81 ± 3.06	52.94 ± 14.46	85.3%	p < 0.0001
Neck	9.52 ± 9.98	57.13 ± 44.65	83.3%	p < 0.0001
Thorax	8.69 ± 4.95	84.24 ± 38.52	89.7%	p < 0.0001
Abdomen	12.5 ± 7.18	98.59 ± 43.29	87.3%	p < 0.0001
Pelvis	9.23 ± 5.55	87.15 ± 48.1	89.4%	p < 0.0001

IN Image noise, IR Iterative reconstruction
Data represent mean ± standard deviation. Difference in means was assessed using a paired sample t-test. A p-value < 0.05 was considered statistically significant