Shape and location of calcified carotid atheroma on panoramic radiographs compared with CT images

Atherosclerosis;Carotid artery;Panoramic radiography;Computed tomography;Vascular calcification;617

치과대학 치의과학과 ;

University:서울대학교 대학원

关键词: Atherosclerosis;    Carotid artery;    Panoramic radiography;    Computed tomography;    Vascular calcification;    617;   

Others  :  http://s-space.snu.ac.kr/bitstream/10371/131105/1/000000003761.pdf

美国|英语

来源: Seoul National University Open Repository

【 摘 要 】

1. ObjectivesA number of reports have suggested that panoramic radiography might be useful to aid in detecting calcified carotid atheroma (CCA). The shape and location of calcified carotid atheroma on panoramic radiographs were described by many authors, based on the experimental knowledge, but there has been no report present objective evidence. Therefore the objective of this study was the evaluation of the location and shape of CCA on panoramic radiograph. Computed tomographic (CT) images were regarded as the gold standard. 2. Materials and MethodsThe CT images of 342 patients (124 men, 218 women: average age 66.9 years, range 55-95 years) at the Seoul National University Dental Hospital from January 2010 to December 2011 were reviewed by an oral and maxillofacial radiologist. Panoramic radiographs of the patients were also reviewed to detect CCAs with aid of the corresponding CT images. The correlation of radiographic findings between CT images and panoramic radiographs were evaluated. The shape of the CCAs on the panoramic radiographs were allocated to one of 6 types such as single plaque-like,multiple plaque-like, tubular, oval, linear and amorphous type. The relative position tohyoid bone, cervical vertebra, and mandibular angle were evaluated on panoramic radiographs. 3. ResultsThe 223 sides of 143 patients were diagnosed from CT images as having CCAs and the 114 sides of 82 patients were diagnosed from panoramic radiographs also. The most common location on the CT images was common carotid artery only (75 sides), but 33.3% of them were also detected on panoramic radiographs. Meanwhile, 14 sides of CCAs were detected on the CT images at the common, internal, external carotid artery simultaneously, and 70% of them were also detected on panoramic radiographs. The detection of CCAs on panoramic radiographs was significantly associated with maximum Hounsfield unit value on CT images, the maximum diameter, the number of cuts and vertical location on CT images.Regarding the shape of CCAs on the panoramic radiographs, the multiple plaque-like type was most common, followed by single plaque-like, amorphous, tubular, linear and the oval type was least. The most frequent location of CCAs relative to cervical vertebra was at the level of C3 (43.0%) and followed by the level of intervertebral space C3-4 (35.1%). Regarding the location relative to the tip of greater horn of hyoid bone, CCAs were located at the superior to the tip in 50% vertically and the same level of the tip in 58.8% horizontally. Regarding the locationrelative to the mandibular angle horizontally, CCAs were located medially in 6.1% medially, 14.0% at the same level, and 79.9% laterally. 4. ConclusionAlthough the shape of calcified atheroma on panoramic radiographs varied, the ;;Plaque-like’ type was most common. The most common location of the CCAs was at the level of C3 and superior to the tip of greater horn of hyoid bone vertically and same level of the tip of greater horn of hyoid bone, posterior of mandibular angle horizontally.