Oblique Axis Rib Stretch and Curved Planar Reformats in Patients for Rib Fracture Detection and Characterization: Feasibility and Clinical Application

Table 1

The number of fractures detected in each site and diagnostic performance with different reconstruction methods of each group.

Group	Anterior	Lateral	Posterior	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Accuracy (%)
OARS1^#	184	69	78	95.94	99.96	99.70	99.38	99.46
OARS2^#	184	70	79	96.52	99.91	99.40	99.47	99.54
CPRs1	153	70	68	84.35	98.17	87.39	97.65	97.92
CPRs2	148	70	70	83.48	98.08	86.75	97.53	97.80
CR	150	55	69	79.42	99.91	99.28	96.94	97.26

OARS: oblique axis rib stretch; CPRs: curved planar reformats; CR: conventional reconstruction.  < 0.05, when compared with the gold standard. ^#A total of 813 and 815 whole ribs (anterior, lateral, and posterior) are shown on the same CT images (about 31.37 percent of all ribs) could be displayed using OARS A step in groups 1 and 2, 1776 and 1763 ribs (anterior and lateral) are shown on the same CT images using OARS A step in groups 1 and 2, respectively. OARS B step can be used to display almost every posterior rib (2588 and 2586 posteriors ribs in groups 1 and 2, respectively), which makes up 99.86% of all ribs. OARS A + B steps can show each complete rib.