A Study of Imaging Techniques of 3-Dimennsional CT Diagnosis for Rib Fractures

Rib fracture is a common disease occurring in patients with blunt chest trauma and can cause variable complications. However, the sensitivity of simple chest X-ray for the diagnosis of rib fracture is not high and the use of axial CT images of multi-detector computed tomography make us to spend so much time and effort to detect rib fracture. Multidetector CT is increasingly used for the evaluation of trauma patients and 3-dimensional CT image is known to be effective to detect rib fractures. The purpose of our study is to investigate the appropriate techniques including slice thickness and increment intervals for reconstructing 3D CT images in the diagnosis of rib fractures. From the raw CT data of 30 patients who were admitted to our emergency department due to blunt chest trauma and performed thoracic multidetector CT, 3 sets of axial images and 4 kinds of volume rendering images were reconstructed. VR1 was reconstructed from the axial images of 2mm slice thickness and 1mm increment interval. VR2 was from the axial images of 1mm slice thickness and 1mm increment interval and VR3 from 1mm slice thickness and 0.5mm increment interval. VR1` was from the axial images of 2mm slice thickness and 1mm increment interval and the right and left side were reconstructed separately. Two radiologists independently interpreted the 4 sets of volume rendering images for the presence and the location of rib fractures and the image quality. Gold standard were from the results of consensus reading by 2 radiologists of axial images with 1mm slice thickness and 0.5mm increment interval. The radionuclide images and volume rendering 3D CT images were also included if available. In comparing with VR1,2 and 3, reader 1 showed the highest sensitivity (60.3%) on VR3 and reader 2 on VR2 and VR3(66.7%) . VR3 showed significantly higher sensitivity than VR1 in both readers(p=0.000). There were significantly differences of sensitivities between VR2 and VR3 in reader 1 and between VR1 and VR2 in reader 2. VR1` showed significantly higher sensitivity than VR1 in both readers (p=0.000).Both readers had higher sensitivity in the displaced fractures than in undisplaced or incomplete fractures. Sensitivity for the fractures in the anterior arcs is significantly lower than in the lateral or posterior arcs. Because higher sensitivities were shown on the volume rendering images reconstructed from axial images with 1mm-thick/0.5mm interval and on the images in which each half of the thorax was separately reconstructed, we expect that volume rendering images of 1mm-thick/0.5mm interval reconstructed for each half of the thorax will be the most accurate and efficient method for the diagnosis of rib fractures on clinical setting.

Author dc:creator

• 김, 태희

Contributors dc:contributor

• 박, 경주
• 대학원 의학과
• 104565

• 늑골 골절
• volumerendering
• 민감도
• 절편 두께
• 재구성 간격

Language dc:language

ko

Identifier

http://dcoll.ajou.ac.kr:9080/dcollection/jsp/common/DcLoOrgPer.jsp?sItemId=000000000774
000000000774

OAI identifier oai:identifier

oai:repository.ajou.ac.kr:201003/1516