Kayo Amiko, Tsuchiya Nanae, Yonemoto Koji, Nakamura Masato, Murayama Sadayuki, Uechi Masaki, Kinjo Shota, Sato Masaki, Moromizato Hidekazu, Toyosato Shun, Ganaha Fumikiyo, Kawakami Yuka, Matayoshi Takashi, Nishie Akihiro
Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Okinawa, Japan.
Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Okinawa, Japan;
In Vivo. 2025 Jan-Feb;39(1):390-395. doi: 10.21873/invivo.13840.
BACKGROUND/AIM: Costal cartilage fractures are associated with poor prognosis in patients with blunt chest trauma. A Computer-Aided Detection (CAD) system for detecting rib fractures has been used in practice, but it is unclear whether this system recognizes costal cartilage fractures. This study investigated whether the CAD system for rib fracture can detect costal cartilage fractures.
A total of 89 patients with costal cartilage fractures from participating hospitals over an 18-year period were included in the study. The presence of a costal cartilage fracture was determined by three radiologists. We reviewed fracture location, cartilage calcification, dislocation, and callus formation. The percentage of agreement between the radiologists and the CAD system (Rib fracture CAD, Fujifilm Medical Co., Ltd) was assessed.
We detected 246 costal cartilage fractures in 89 patients. The costal cartilage of rib 7 was injured most frequently. Costal cartilage fractures were categorized as either mid-chondral, costochondral, or chondro-sternal. The CAD system detected 33 lesions; 16 were consistent with the costal cartilage fractures determined by the radiologists (costochondral junction 13, mid-chondral 2, chondro-sternal 1).
The CAD system for rib fracture can detect costal cartilage fractures at the costochondral junction but is not sufficiently sensitive to detect costal cartilage fractures without calcification. The CAD system for rib fracture needs further development before it can be used to detect rib cartilage fractures.
背景/目的：在钝性胸部创伤患者中，肋软骨骨折与预后不良相关。一种用于检测肋骨骨折的计算机辅助检测（CAD）系统已在实际中使用，但尚不清楚该系统能否识别肋软骨骨折。本研究调查了用于肋骨骨折的CAD系统是否能检测肋软骨骨折。
本研究纳入了18年间来自参与研究医院的89例肋软骨骨折患者。由三位放射科医生确定肋软骨骨折的存在情况。我们评估了骨折部位、软骨钙化、脱位和骨痂形成情况。评估了放射科医生与CAD系统（富士胶片医疗株式会社的肋骨骨折CAD系统）之间的一致性百分比。
我们在89例患者中检测到246处肋软骨骨折。第7肋的肋软骨损伤最为常见。肋软骨骨折分为软骨中段、肋软骨结合部或软骨胸骨部骨折。CAD系统检测到33处病变；其中16处与放射科医生确定的肋软骨骨折一致（肋软骨结合部13处、软骨中段2处、软骨胸骨部1处）。
用于肋骨骨折的CAD系统能够检测肋软骨结合部的肋软骨骨折，但对于未钙化的肋软骨骨折检测敏感性不足。用于肋骨骨折的CAD系统在可用于检测肋软骨骨折之前还需要进一步发展。
